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  1. /**
  2.   ******************************************************************************
  3.   * @file    stm32f0xx_hal_uart.c
  4.   * @author  MCD Application Team
  5.   * @brief   UART HAL module driver.
  6.   *          This file provides firmware functions to manage the following
  7.   *          functionalities of the Universal Asynchronous Receiver Transmitter Peripheral (UART).
  8.   *           + Initialization and de-initialization functions
  9.   *           + IO operation functions
  10.   *           + Peripheral Control functions
  11.   *
  12.   *
  13.   @verbatim
  14.  ===============================================================================
  15.                         ##### How to use this driver #####
  16.  ===============================================================================
  17.   [..]
  18.     The UART HAL driver can be used as follows:
  19.  
  20.     (#) Declare a UART_HandleTypeDef handle structure (eg. UART_HandleTypeDef huart).
  21.     (#) Initialize the UART low level resources by implementing the HAL_UART_MspInit() API:
  22.         (++) Enable the USARTx interface clock.
  23.         (++) UART pins configuration:
  24.             (+++) Enable the clock for the UART GPIOs.
  25.             (+++) Configure these UART pins as alternate function pull-up.
  26.         (++) NVIC configuration if you need to use interrupt process (HAL_UART_Transmit_IT()
  27.              and HAL_UART_Receive_IT() APIs):
  28.             (+++) Configure the USARTx interrupt priority.
  29.             (+++) Enable the NVIC USART IRQ handle.
  30.         (++) UART interrupts handling:
  31.               -@@-  The specific UART interrupts (Transmission complete interrupt,
  32.                 RXNE interrupt, RX/TX FIFOs related interrupts and Error Interrupts)
  33.                 are managed using the macros __HAL_UART_ENABLE_IT() and __HAL_UART_DISABLE_IT()
  34.                 inside the transmit and receive processes.
  35.         (++) DMA Configuration if you need to use DMA process (HAL_UART_Transmit_DMA()
  36.              and HAL_UART_Receive_DMA() APIs):
  37.             (+++) Declare a DMA handle structure for the Tx/Rx channel.
  38.             (+++) Enable the DMAx interface clock.
  39.             (+++) Configure the declared DMA handle structure with the required Tx/Rx parameters.
  40.             (+++) Configure the DMA Tx/Rx channel.
  41.             (+++) Associate the initialized DMA handle to the UART DMA Tx/Rx handle.
  42.             (+++) Configure the priority and enable the NVIC for the transfer complete
  43.                   interrupt on the DMA Tx/Rx channel.
  44.  
  45.     (#) Program the Baud Rate, Word Length, Stop Bit, Parity, Hardware
  46.         flow control and Mode (Receiver/Transmitter) in the huart handle Init structure.
  47.  
  48.     (#) If required, program UART advanced features (TX/RX pins swap, auto Baud rate detection,...)
  49.         in the huart handle AdvancedInit structure.
  50.  
  51.     (#) For the UART asynchronous mode, initialize the UART registers by calling
  52.         the HAL_UART_Init() API.
  53.  
  54.     (#) For the UART Half duplex mode, initialize the UART registers by calling
  55.         the HAL_HalfDuplex_Init() API.
  56.  
  57.     (#) For the UART LIN (Local Interconnection Network) mode, initialize the UART registers
  58.         by calling the HAL_LIN_Init() API.
  59.  
  60.     (#) For the UART Multiprocessor mode, initialize the UART registers
  61.         by calling the HAL_MultiProcessor_Init() API.
  62.  
  63.     (#) For the UART RS485 Driver Enabled mode, initialize the UART registers
  64.         by calling the HAL_RS485Ex_Init() API.
  65.  
  66.     [..]
  67.     (@) These API's (HAL_UART_Init(), HAL_HalfDuplex_Init(), HAL_LIN_Init(), HAL_MultiProcessor_Init(),
  68.         also configure the low level Hardware GPIO, CLOCK, CORTEX...etc) by
  69.         calling the customized HAL_UART_MspInit() API.
  70.  
  71.     ##### Callback registration #####
  72.     ==================================
  73.  
  74.     [..]
  75.     The compilation define USE_HAL_UART_REGISTER_CALLBACKS when set to 1
  76.     allows the user to configure dynamically the driver callbacks.
  77.  
  78.     [..]
  79.     Use Function HAL_UART_RegisterCallback() to register a user callback.
  80.     Function HAL_UART_RegisterCallback() allows to register following callbacks:
  81.     (+) TxHalfCpltCallback        : Tx Half Complete Callback.
  82.     (+) TxCpltCallback            : Tx Complete Callback.
  83.     (+) RxHalfCpltCallback        : Rx Half Complete Callback.
  84.     (+) RxCpltCallback            : Rx Complete Callback.
  85.     (+) ErrorCallback             : Error Callback.
  86.     (+) AbortCpltCallback         : Abort Complete Callback.
  87.     (+) AbortTransmitCpltCallback : Abort Transmit Complete Callback.
  88.     (+) AbortReceiveCpltCallback  : Abort Receive Complete Callback.
  89.     (+) WakeupCallback            : Wakeup Callback.
  90.     (+) MspInitCallback           : UART MspInit.
  91.     (+) MspDeInitCallback         : UART MspDeInit.
  92.     This function takes as parameters the HAL peripheral handle, the Callback ID
  93.     and a pointer to the user callback function.
  94.  
  95.     [..]
  96.     Use function HAL_UART_UnRegisterCallback() to reset a callback to the default
  97.     weak (surcharged) function.
  98.     HAL_UART_UnRegisterCallback() takes as parameters the HAL peripheral handle,
  99.     and the Callback ID.
  100.     This function allows to reset following callbacks:
  101.     (+) TxHalfCpltCallback        : Tx Half Complete Callback.
  102.     (+) TxCpltCallback            : Tx Complete Callback.
  103.     (+) RxHalfCpltCallback        : Rx Half Complete Callback.
  104.     (+) RxCpltCallback            : Rx Complete Callback.
  105.     (+) ErrorCallback             : Error Callback.
  106.     (+) AbortCpltCallback         : Abort Complete Callback.
  107.     (+) AbortTransmitCpltCallback : Abort Transmit Complete Callback.
  108.     (+) AbortReceiveCpltCallback  : Abort Receive Complete Callback.
  109.     (+) WakeupCallback            : Wakeup Callback.
  110.     (+) MspInitCallback           : UART MspInit.
  111.     (+) MspDeInitCallback         : UART MspDeInit.
  112.  
  113.     [..]
  114.     For specific callback RxEventCallback, use dedicated registration/reset functions:
  115.     respectively HAL_UART_RegisterRxEventCallback() , HAL_UART_UnRegisterRxEventCallback().
  116.  
  117.     [..]
  118.     By default, after the HAL_UART_Init() and when the state is HAL_UART_STATE_RESET
  119.     all callbacks are set to the corresponding weak (surcharged) functions:
  120.     examples HAL_UART_TxCpltCallback(), HAL_UART_RxHalfCpltCallback().
  121.     Exception done for MspInit and MspDeInit functions that are respectively
  122.     reset to the legacy weak (surcharged) functions in the HAL_UART_Init()
  123.     and HAL_UART_DeInit() only when these callbacks are null (not registered beforehand).
  124.     If not, MspInit or MspDeInit are not null, the HAL_UART_Init() and HAL_UART_DeInit()
  125.     keep and use the user MspInit/MspDeInit callbacks (registered beforehand).
  126.  
  127.     [..]
  128.     Callbacks can be registered/unregistered in HAL_UART_STATE_READY state only.
  129.     Exception done MspInit/MspDeInit that can be registered/unregistered
  130.     in HAL_UART_STATE_READY or HAL_UART_STATE_RESET state, thus registered (user)
  131.     MspInit/DeInit callbacks can be used during the Init/DeInit.
  132.     In that case first register the MspInit/MspDeInit user callbacks
  133.     using HAL_UART_RegisterCallback() before calling HAL_UART_DeInit()
  134.     or HAL_UART_Init() function.
  135.  
  136.     [..]
  137.     When The compilation define USE_HAL_UART_REGISTER_CALLBACKS is set to 0 or
  138.     not defined, the callback registration feature is not available
  139.     and weak (surcharged) callbacks are used.
  140.  
  141.  
  142.   @endverbatim
  143.   ******************************************************************************
  144.   * @attention
  145.   *
  146.   * <h2><center>&copy; Copyright (c) 2016 STMicroelectronics.
  147.   * All rights reserved.</center></h2>
  148.   *
  149.   * This software component is licensed by ST under BSD 3-Clause license,
  150.   * the "License"; You may not use this file except in compliance with the
  151.   * License. You may obtain a copy of the License at:
  152.   *                        opensource.org/licenses/BSD-3-Clause
  153.   *
  154.   ******************************************************************************
  155.   */
  156.  
  157. /* Includes ------------------------------------------------------------------*/
  158. #include "stm32f0xx_hal.h"
  159.  
  160. /** @addtogroup STM32F0xx_HAL_Driver
  161.   * @{
  162.   */
  163.  
  164. /** @defgroup UART UART
  165.   * @brief HAL UART module driver
  166.   * @{
  167.   */
  168.  
  169. #ifdef HAL_UART_MODULE_ENABLED
  170.  
  171. /* Private typedef -----------------------------------------------------------*/
  172. /* Private define ------------------------------------------------------------*/
  173. /** @defgroup UART_Private_Constants UART Private Constants
  174.   * @{
  175.   */
  176. #define USART_CR1_FIELDS  ((uint32_t)(USART_CR1_M | USART_CR1_PCE | USART_CR1_PS | USART_CR1_TE | USART_CR1_RE | \
  177.                                       USART_CR1_OVER8)) /*!< UART or USART CR1 fields of parameters set by UART_SetConfig API */
  178.  
  179. #define USART_CR3_FIELDS  ((uint32_t)(USART_CR3_RTSE | USART_CR3_CTSE |\
  180.                             USART_CR3_ONEBIT)) /*!< UART or USART CR3 fields of parameters set by UART_SetConfig API */
  181.  
  182.  
  183. #define UART_BRR_MIN    0x10U        /* UART BRR minimum authorized value */
  184. #define UART_BRR_MAX    0x0000FFFFU  /* UART BRR maximum authorized value */
  185. /**
  186.   * @}
  187.   */
  188.  
  189. /* Private macros ------------------------------------------------------------*/
  190. /* Private function prototypes -----------------------------------------------*/
  191. /** @addtogroup UART_Private_Functions
  192.   * @{
  193.   */
  194. static void UART_EndTxTransfer(UART_HandleTypeDef *huart);
  195. static void UART_EndRxTransfer(UART_HandleTypeDef *huart);
  196. static void UART_DMATransmitCplt(DMA_HandleTypeDef *hdma);
  197. static void UART_DMAReceiveCplt(DMA_HandleTypeDef *hdma);
  198. static void UART_DMARxHalfCplt(DMA_HandleTypeDef *hdma);
  199. static void UART_DMATxHalfCplt(DMA_HandleTypeDef *hdma);
  200. static void UART_DMAError(DMA_HandleTypeDef *hdma);
  201. static void UART_DMAAbortOnError(DMA_HandleTypeDef *hdma);
  202. static void UART_DMATxAbortCallback(DMA_HandleTypeDef *hdma);
  203. static void UART_DMARxAbortCallback(DMA_HandleTypeDef *hdma);
  204. static void UART_DMATxOnlyAbortCallback(DMA_HandleTypeDef *hdma);
  205. static void UART_DMARxOnlyAbortCallback(DMA_HandleTypeDef *hdma);
  206. static void UART_TxISR_8BIT(UART_HandleTypeDef *huart);
  207. static void UART_TxISR_16BIT(UART_HandleTypeDef *huart);
  208. static void UART_EndTransmit_IT(UART_HandleTypeDef *huart);
  209. static void UART_RxISR_8BIT(UART_HandleTypeDef *huart);
  210. static void UART_RxISR_16BIT(UART_HandleTypeDef *huart);
  211. /**
  212.   * @}
  213.   */
  214.  
  215. /* Private variables ---------------------------------------------------------*/
  216. /* Exported Constants --------------------------------------------------------*/
  217. /* Exported functions --------------------------------------------------------*/
  218.  
  219. /** @defgroup UART_Exported_Functions UART Exported Functions
  220.   * @{
  221.   */
  222.  
  223. /** @defgroup UART_Exported_Functions_Group1 Initialization and de-initialization functions
  224.   *  @brief    Initialization and Configuration functions
  225.   *
  226. @verbatim
  227. ===============================================================================
  228.             ##### Initialization and Configuration functions #####
  229.  ===============================================================================
  230.     [..]
  231.     This subsection provides a set of functions allowing to initialize the USARTx or the UARTy
  232.     in asynchronous mode.
  233.       (+) For the asynchronous mode the parameters below can be configured:
  234.         (++) Baud Rate
  235.         (++) Word Length
  236.         (++) Stop Bit
  237.         (++) Parity: If the parity is enabled, then the MSB bit of the data written
  238.              in the data register is transmitted but is changed by the parity bit.
  239.         (++) Hardware flow control
  240.         (++) Receiver/transmitter modes
  241.         (++) Over Sampling Method
  242.         (++) One-Bit Sampling Method
  243.       (+) For the asynchronous mode, the following advanced features can be configured as well:
  244.         (++) TX and/or RX pin level inversion
  245.         (++) data logical level inversion
  246.         (++) RX and TX pins swap
  247.         (++) RX overrun detection disabling
  248.         (++) DMA disabling on RX error
  249.         (++) MSB first on communication line
  250.         (++) auto Baud rate detection
  251.     [..]
  252.     The HAL_UART_Init(), HAL_HalfDuplex_Init(), HAL_LIN_Init()and HAL_MultiProcessor_Init()API
  253.     follow respectively the UART asynchronous, UART Half duplex, UART LIN mode
  254.     and UART multiprocessor mode configuration procedures (details for the procedures
  255.     are available in reference manual).
  256.  
  257. @endverbatim
  258.  
  259.   Depending on the frame length defined by the M1 and M0 bits (7-bit,
  260.   8-bit or 9-bit), the possible UART formats are listed in the
  261.   following table.
  262.  
  263.   Table 1. UART frame format.
  264.     +-----------------------------------------------------------------------+
  265.     |  M1 bit |  M0 bit |  PCE bit  |             UART frame                |
  266.     |---------|---------|-----------|---------------------------------------|
  267.     |    0    |    0    |    0      |    | SB |    8 bit data   | STB |     |
  268.     |---------|---------|-----------|---------------------------------------|
  269.     |    0    |    0    |    1      |    | SB | 7 bit data | PB | STB |     |
  270.     |---------|---------|-----------|---------------------------------------|
  271.     |    0    |    1    |    0      |    | SB |    9 bit data   | STB |     |
  272.     |---------|---------|-----------|---------------------------------------|
  273.     |    0    |    1    |    1      |    | SB | 8 bit data | PB | STB |     |
  274.     |---------|---------|-----------|---------------------------------------|
  275.     |    1    |    0    |    0      |    | SB |    7 bit data   | STB |     |
  276.     |---------|---------|-----------|---------------------------------------|
  277.     |    1    |    0    |    1      |    | SB | 6 bit data | PB | STB |     |
  278.     +-----------------------------------------------------------------------+
  279.  
  280.   * @{
  281.   */
  282.  
  283. /**
  284.   * @brief Initialize the UART mode according to the specified
  285.   *        parameters in the UART_InitTypeDef and initialize the associated handle.
  286.   * @param huart UART handle.
  287.   * @retval HAL status
  288.   */
  289. HAL_StatusTypeDef HAL_UART_Init(UART_HandleTypeDef *huart)
  290. {
  291.   /* Check the UART handle allocation */
  292.   if (huart == NULL)
  293.   {
  294.     return HAL_ERROR;
  295.   }
  296.  
  297.   if (huart->Init.HwFlowCtl != UART_HWCONTROL_NONE)
  298.   {
  299.     /* Check the parameters */
  300.     assert_param(IS_UART_HWFLOW_INSTANCE(huart->Instance));
  301.   }
  302.   else
  303.   {
  304.     /* Check the parameters */
  305.     assert_param(IS_UART_INSTANCE(huart->Instance));
  306.   }
  307.  
  308.   if (huart->gState == HAL_UART_STATE_RESET)
  309.   {
  310.     /* Allocate lock resource and initialize it */
  311.     huart->Lock = HAL_UNLOCKED;
  312.  
  313. #if (USE_HAL_UART_REGISTER_CALLBACKS == 1)
  314.     UART_InitCallbacksToDefault(huart);
  315.  
  316.     if (huart->MspInitCallback == NULL)
  317.     {
  318.       huart->MspInitCallback = HAL_UART_MspInit;
  319.     }
  320.  
  321.     /* Init the low level hardware */
  322.     huart->MspInitCallback(huart);
  323. #else
  324.     /* Init the low level hardware : GPIO, CLOCK */
  325.     HAL_UART_MspInit(huart);
  326. #endif /* (USE_HAL_UART_REGISTER_CALLBACKS) */
  327.   }
  328.  
  329.   huart->gState = HAL_UART_STATE_BUSY;
  330.  
  331.   __HAL_UART_DISABLE(huart);
  332.  
  333.   /* Set the UART Communication parameters */
  334.   if (UART_SetConfig(huart) == HAL_ERROR)
  335.   {
  336.     return HAL_ERROR;
  337.   }
  338.  
  339.   if (huart->AdvancedInit.AdvFeatureInit != UART_ADVFEATURE_NO_INIT)
  340.   {
  341.     UART_AdvFeatureConfig(huart);
  342.   }
  343.  
  344.   /* In asynchronous mode, the following bits must be kept cleared:
  345.   - LINEN (if LIN is supported) and CLKEN bits in the USART_CR2 register,
  346.   - SCEN (if Smartcard is supported), HDSEL and IREN (if IrDA is supported)  bits in the USART_CR3 register.*/
  347. #if defined (USART_CR2_LINEN)
  348.   CLEAR_BIT(huart->Instance->CR2, (USART_CR2_LINEN | USART_CR2_CLKEN));
  349. #else
  350.   CLEAR_BIT(huart->Instance->CR2, USART_CR2_CLKEN);
  351. #endif /* USART_CR2_LINEN */
  352. #if defined (USART_CR3_SCEN)
  353. #if defined (USART_CR3_IREN)
  354.   CLEAR_BIT(huart->Instance->CR3, (USART_CR3_SCEN | USART_CR3_HDSEL | USART_CR3_IREN));
  355. #else
  356.   CLEAR_BIT(huart->Instance->CR3, (USART_CR3_SCEN | USART_CR3_HDSEL));
  357. #endif /* USART_CR3_IREN */
  358. #else
  359. #if defined (USART_CR3_IREN)
  360.   CLEAR_BIT(huart->Instance->CR3, (USART_CR3_HDSEL | USART_CR3_IREN));
  361. #else
  362.   CLEAR_BIT(huart->Instance->CR3, USART_CR3_HDSEL);
  363. #endif /* USART_CR3_IREN*/
  364. #endif /* USART_CR3_SCEN */
  365.  
  366.   __HAL_UART_ENABLE(huart);
  367.  
  368.   /* TEACK and/or REACK to check before moving huart->gState and huart->RxState to Ready */
  369.   return (UART_CheckIdleState(huart));
  370. }
  371.  
  372. /**
  373.   * @brief Initialize the half-duplex mode according to the specified
  374.   *        parameters in the UART_InitTypeDef and creates the associated handle.
  375.   * @param huart UART handle.
  376.   * @retval HAL status
  377.   */
  378. HAL_StatusTypeDef HAL_HalfDuplex_Init(UART_HandleTypeDef *huart)
  379. {
  380.   /* Check the UART handle allocation */
  381.   if (huart == NULL)
  382.   {
  383.     return HAL_ERROR;
  384.   }
  385.  
  386.   /* Check UART instance */
  387.   assert_param(IS_UART_HALFDUPLEX_INSTANCE(huart->Instance));
  388.  
  389.   if (huart->gState == HAL_UART_STATE_RESET)
  390.   {
  391.     /* Allocate lock resource and initialize it */
  392.     huart->Lock = HAL_UNLOCKED;
  393.  
  394. #if (USE_HAL_UART_REGISTER_CALLBACKS == 1)
  395.     UART_InitCallbacksToDefault(huart);
  396.  
  397.     if (huart->MspInitCallback == NULL)
  398.     {
  399.       huart->MspInitCallback = HAL_UART_MspInit;
  400.     }
  401.  
  402.     /* Init the low level hardware */
  403.     huart->MspInitCallback(huart);
  404. #else
  405.     /* Init the low level hardware : GPIO, CLOCK */
  406.     HAL_UART_MspInit(huart);
  407. #endif /* (USE_HAL_UART_REGISTER_CALLBACKS) */
  408.   }
  409.  
  410.   huart->gState = HAL_UART_STATE_BUSY;
  411.  
  412.   __HAL_UART_DISABLE(huart);
  413.  
  414.   /* Set the UART Communication parameters */
  415.   if (UART_SetConfig(huart) == HAL_ERROR)
  416.   {
  417.     return HAL_ERROR;
  418.   }
  419.  
  420.   if (huart->AdvancedInit.AdvFeatureInit != UART_ADVFEATURE_NO_INIT)
  421.   {
  422.     UART_AdvFeatureConfig(huart);
  423.   }
  424.  
  425.   /* In half-duplex mode, the following bits must be kept cleared:
  426.   - LINEN (if LIN is supported) and CLKEN bits in the USART_CR2 register,
  427.   - SCEN (if Smartcard is supported) and IREN (if IrDA is supported) bits in the USART_CR3 register.*/
  428. #if defined (USART_CR2_LINEN)
  429.   CLEAR_BIT(huart->Instance->CR2, (USART_CR2_LINEN | USART_CR2_CLKEN));
  430. #else
  431.   CLEAR_BIT(huart->Instance->CR2, USART_CR2_CLKEN);
  432. #endif /* USART_CR2_LINEN */
  433. #if defined (USART_CR3_SCEN)
  434. #if defined (USART_CR3_IREN)
  435.   CLEAR_BIT(huart->Instance->CR3, (USART_CR3_IREN | USART_CR3_SCEN));
  436. #else
  437.   CLEAR_BIT(huart->Instance->CR3, USART_CR3_SCEN);
  438. #endif /* USART_CR3_IREN */
  439. #else
  440. #if defined (USART_CR3_IREN)
  441.   CLEAR_BIT(huart->Instance->CR3, USART_CR3_IREN);
  442. #endif /* USART_CR3_IREN */
  443. #endif /* USART_CR3_SCEN */
  444.  
  445.   /* Enable the Half-Duplex mode by setting the HDSEL bit in the CR3 register */
  446.   SET_BIT(huart->Instance->CR3, USART_CR3_HDSEL);
  447.  
  448.   __HAL_UART_ENABLE(huart);
  449.  
  450.   /* TEACK and/or REACK to check before moving huart->gState and huart->RxState to Ready */
  451.   return (UART_CheckIdleState(huart));
  452. }
  453.  
  454.  
  455. #if   defined(USART_CR2_LINEN)
  456. /**
  457.   * @brief Initialize the LIN mode according to the specified
  458.   *        parameters in the UART_InitTypeDef and creates the associated handle.
  459.   * @param huart             UART handle.
  460.   * @param BreakDetectLength Specifies the LIN break detection length.
  461.   *        This parameter can be one of the following values:
  462.   *          @arg @ref UART_LINBREAKDETECTLENGTH_10B 10-bit break detection
  463.   *          @arg @ref UART_LINBREAKDETECTLENGTH_11B 11-bit break detection
  464.   * @retval HAL status
  465.   */
  466. HAL_StatusTypeDef HAL_LIN_Init(UART_HandleTypeDef *huart, uint32_t BreakDetectLength)
  467. {
  468.   /* Check the UART handle allocation */
  469.   if (huart == NULL)
  470.   {
  471.     return HAL_ERROR;
  472.   }
  473.  
  474.   /* Check the LIN UART instance */
  475.   assert_param(IS_UART_LIN_INSTANCE(huart->Instance));
  476.   /* Check the Break detection length parameter */
  477.   assert_param(IS_UART_LIN_BREAK_DETECT_LENGTH(BreakDetectLength));
  478.  
  479.   /* LIN mode limited to 16-bit oversampling only */
  480.   if (huart->Init.OverSampling == UART_OVERSAMPLING_8)
  481.   {
  482.     return HAL_ERROR;
  483.   }
  484.   /* LIN mode limited to 8-bit data length */
  485.   if (huart->Init.WordLength != UART_WORDLENGTH_8B)
  486.   {
  487.     return HAL_ERROR;
  488.   }
  489.  
  490.   if (huart->gState == HAL_UART_STATE_RESET)
  491.   {
  492.     /* Allocate lock resource and initialize it */
  493.     huart->Lock = HAL_UNLOCKED;
  494.  
  495. #if (USE_HAL_UART_REGISTER_CALLBACKS == 1)
  496.     UART_InitCallbacksToDefault(huart);
  497.  
  498.     if (huart->MspInitCallback == NULL)
  499.     {
  500.       huart->MspInitCallback = HAL_UART_MspInit;
  501.     }
  502.  
  503.     /* Init the low level hardware */
  504.     huart->MspInitCallback(huart);
  505. #else
  506.     /* Init the low level hardware : GPIO, CLOCK */
  507.     HAL_UART_MspInit(huart);
  508. #endif /* (USE_HAL_UART_REGISTER_CALLBACKS) */
  509.   }
  510.  
  511.   huart->gState = HAL_UART_STATE_BUSY;
  512.  
  513.   __HAL_UART_DISABLE(huart);
  514.  
  515.   /* Set the UART Communication parameters */
  516.   if (UART_SetConfig(huart) == HAL_ERROR)
  517.   {
  518.     return HAL_ERROR;
  519.   }
  520.  
  521.   if (huart->AdvancedInit.AdvFeatureInit != UART_ADVFEATURE_NO_INIT)
  522.   {
  523.     UART_AdvFeatureConfig(huart);
  524.   }
  525.  
  526.   /* In LIN mode, the following bits must be kept cleared:
  527.   - LINEN and CLKEN bits in the USART_CR2 register,
  528.   - SCEN(if Smartcard is supported) and IREN(if IrDA is supported) bits in the USART_CR3 register.*/
  529.   CLEAR_BIT(huart->Instance->CR2, (USART_CR2_LINEN | USART_CR2_CLKEN));
  530. #if defined (USART_CR3_SCEN)
  531. #if defined (USART_CR3_IREN)
  532.   CLEAR_BIT(huart->Instance->CR3, (USART_CR3_SCEN | USART_CR3_HDSEL | USART_CR3_IREN));
  533. #else
  534.   CLEAR_BIT(huart->Instance->CR3, (USART_CR3_SCEN | USART_CR3_HDSEL));
  535. #endif /* USART_CR3_IREN */
  536. #else
  537. #if defined (USART_CR3_IREN)
  538.   CLEAR_BIT(huart->Instance->CR3, (USART_CR3_HDSEL | USART_CR3_IREN));
  539. #else
  540.   CLEAR_BIT(huart->Instance->CR3, USART_CR3_HDSEL);
  541. #endif /* USART_CR3_IREN*/
  542. #endif /* USART_CR3_SCEN */
  543.  
  544.   /* Enable the LIN mode by setting the LINEN bit in the CR2 register */
  545.   SET_BIT(huart->Instance->CR2, USART_CR2_LINEN);
  546.  
  547.   /* Set the USART LIN Break detection length. */
  548.   MODIFY_REG(huart->Instance->CR2, USART_CR2_LBDL, BreakDetectLength);
  549.  
  550.   __HAL_UART_ENABLE(huart);
  551.  
  552.   /* TEACK and/or REACK to check before moving huart->gState and huart->RxState to Ready */
  553.   return (UART_CheckIdleState(huart));
  554. }
  555. #endif /* USART_CR2_LINEN */
  556.  
  557.  
  558. /**
  559.   * @brief Initialize the multiprocessor mode according to the specified
  560.   *        parameters in the UART_InitTypeDef and initialize the associated handle.
  561.   * @param huart        UART handle.
  562.   * @param Address      UART node address (4-, 6-, 7- or 8-bit long).
  563.   * @param WakeUpMethod Specifies the UART wakeup method.
  564.   *        This parameter can be one of the following values:
  565.   *          @arg @ref UART_WAKEUPMETHOD_IDLELINE WakeUp by an idle line detection
  566.   *          @arg @ref UART_WAKEUPMETHOD_ADDRESSMARK WakeUp by an address mark
  567.   * @note  If the user resorts to idle line detection wake up, the Address parameter
  568.   *        is useless and ignored by the initialization function.
  569.   * @note  If the user resorts to address mark wake up, the address length detection
  570.   *        is configured by default to 4 bits only. For the UART to be able to
  571.   *        manage 6-, 7- or 8-bit long addresses detection, the API
  572.   *        HAL_MultiProcessorEx_AddressLength_Set() must be called after
  573.   *        HAL_MultiProcessor_Init().
  574.   * @retval HAL status
  575.   */
  576. HAL_StatusTypeDef HAL_MultiProcessor_Init(UART_HandleTypeDef *huart, uint8_t Address, uint32_t WakeUpMethod)
  577. {
  578.   /* Check the UART handle allocation */
  579.   if (huart == NULL)
  580.   {
  581.     return HAL_ERROR;
  582.   }
  583.  
  584.   /* Check the wake up method parameter */
  585.   assert_param(IS_UART_WAKEUPMETHOD(WakeUpMethod));
  586.  
  587.   if (huart->gState == HAL_UART_STATE_RESET)
  588.   {
  589.     /* Allocate lock resource and initialize it */
  590.     huart->Lock = HAL_UNLOCKED;
  591.  
  592. #if (USE_HAL_UART_REGISTER_CALLBACKS == 1)
  593.     UART_InitCallbacksToDefault(huart);
  594.  
  595.     if (huart->MspInitCallback == NULL)
  596.     {
  597.       huart->MspInitCallback = HAL_UART_MspInit;
  598.     }
  599.  
  600.     /* Init the low level hardware */
  601.     huart->MspInitCallback(huart);
  602. #else
  603.     /* Init the low level hardware : GPIO, CLOCK */
  604.     HAL_UART_MspInit(huart);
  605. #endif /* (USE_HAL_UART_REGISTER_CALLBACKS) */
  606.   }
  607.  
  608.   huart->gState = HAL_UART_STATE_BUSY;
  609.  
  610.   __HAL_UART_DISABLE(huart);
  611.  
  612.   /* Set the UART Communication parameters */
  613.   if (UART_SetConfig(huart) == HAL_ERROR)
  614.   {
  615.     return HAL_ERROR;
  616.   }
  617.  
  618.   if (huart->AdvancedInit.AdvFeatureInit != UART_ADVFEATURE_NO_INIT)
  619.   {
  620.     UART_AdvFeatureConfig(huart);
  621.   }
  622.  
  623.   /* In multiprocessor mode, the following bits must be kept cleared:
  624.   - LINEN (if LIN is supported) and CLKEN bits in the USART_CR2 register,
  625.   - SCEN (if Smartcard is supported), HDSEL and IREN (if IrDA is supported) bits in the USART_CR3 register. */
  626. #if defined (USART_CR2_LINEN)
  627.   CLEAR_BIT(huart->Instance->CR2, (USART_CR2_LINEN | USART_CR2_CLKEN));
  628. #else
  629.   CLEAR_BIT(huart->Instance->CR2, USART_CR2_CLKEN);
  630. #endif /* USART_CR2_LINEN */
  631. #if defined (USART_CR3_SCEN)
  632. #if defined (USART_CR3_IREN)
  633.   CLEAR_BIT(huart->Instance->CR3, (USART_CR3_SCEN | USART_CR3_HDSEL | USART_CR3_IREN));
  634. #else
  635.   CLEAR_BIT(huart->Instance->CR3, (USART_CR3_SCEN | USART_CR3_HDSEL));
  636. #endif /* USART_CR3_IREN */
  637. #else
  638. #if defined (USART_CR3_IREN)
  639.   CLEAR_BIT(huart->Instance->CR3, (USART_CR3_HDSEL | USART_CR3_IREN));
  640. #else
  641.   CLEAR_BIT(huart->Instance->CR3, USART_CR3_HDSEL);
  642. #endif /* USART_CR3_IREN */
  643. #endif /* USART_CR3_SCEN */
  644.  
  645.   if (WakeUpMethod == UART_WAKEUPMETHOD_ADDRESSMARK)
  646.   {
  647.     /* If address mark wake up method is chosen, set the USART address node */
  648.     MODIFY_REG(huart->Instance->CR2, USART_CR2_ADD, ((uint32_t)Address << UART_CR2_ADDRESS_LSB_POS));
  649.   }
  650.  
  651.   /* Set the wake up method by setting the WAKE bit in the CR1 register */
  652.   MODIFY_REG(huart->Instance->CR1, USART_CR1_WAKE, WakeUpMethod);
  653.  
  654.   __HAL_UART_ENABLE(huart);
  655.  
  656.   /* TEACK and/or REACK to check before moving huart->gState and huart->RxState to Ready */
  657.   return (UART_CheckIdleState(huart));
  658. }
  659.  
  660.  
  661. /**
  662.   * @brief DeInitialize the UART peripheral.
  663.   * @param huart UART handle.
  664.   * @retval HAL status
  665.   */
  666. HAL_StatusTypeDef HAL_UART_DeInit(UART_HandleTypeDef *huart)
  667. {
  668.   /* Check the UART handle allocation */
  669.   if (huart == NULL)
  670.   {
  671.     return HAL_ERROR;
  672.   }
  673.  
  674.   /* Check the parameters */
  675.   assert_param(IS_UART_INSTANCE(huart->Instance));
  676.  
  677.   huart->gState = HAL_UART_STATE_BUSY;
  678.  
  679.   __HAL_UART_DISABLE(huart);
  680.  
  681.   huart->Instance->CR1 = 0x0U;
  682.   huart->Instance->CR2 = 0x0U;
  683.   huart->Instance->CR3 = 0x0U;
  684.  
  685. #if (USE_HAL_UART_REGISTER_CALLBACKS == 1)
  686.   if (huart->MspDeInitCallback == NULL)
  687.   {
  688.     huart->MspDeInitCallback = HAL_UART_MspDeInit;
  689.   }
  690.   /* DeInit the low level hardware */
  691.   huart->MspDeInitCallback(huart);
  692. #else
  693.   /* DeInit the low level hardware */
  694.   HAL_UART_MspDeInit(huart);
  695. #endif /* (USE_HAL_UART_REGISTER_CALLBACKS) */
  696.  
  697.   huart->ErrorCode = HAL_UART_ERROR_NONE;
  698.   huart->gState = HAL_UART_STATE_RESET;
  699.   huart->RxState = HAL_UART_STATE_RESET;
  700.   huart->ReceptionType = HAL_UART_RECEPTION_STANDARD;
  701.  
  702.   __HAL_UNLOCK(huart);
  703.  
  704.   return HAL_OK;
  705. }
  706.  
  707. /**
  708.   * @brief Initialize the UART MSP.
  709.   * @param huart UART handle.
  710.   * @retval None
  711.   */
  712. __weak void HAL_UART_MspInit(UART_HandleTypeDef *huart)
  713. {
  714.   /* Prevent unused argument(s) compilation warning */
  715.   UNUSED(huart);
  716.  
  717.   /* NOTE : This function should not be modified, when the callback is needed,
  718.             the HAL_UART_MspInit can be implemented in the user file
  719.    */
  720. }
  721.  
  722. /**
  723.   * @brief DeInitialize the UART MSP.
  724.   * @param huart UART handle.
  725.   * @retval None
  726.   */
  727. __weak void HAL_UART_MspDeInit(UART_HandleTypeDef *huart)
  728. {
  729.   /* Prevent unused argument(s) compilation warning */
  730.   UNUSED(huart);
  731.  
  732.   /* NOTE : This function should not be modified, when the callback is needed,
  733.             the HAL_UART_MspDeInit can be implemented in the user file
  734.    */
  735. }
  736.  
  737. #if (USE_HAL_UART_REGISTER_CALLBACKS == 1)
  738. /**
  739.   * @brief  Register a User UART Callback
  740.   *         To be used instead of the weak predefined callback
  741.   * @param  huart uart handle
  742.   * @param  CallbackID ID of the callback to be registered
  743.   *         This parameter can be one of the following values:
  744.   *           @arg @ref HAL_UART_TX_HALFCOMPLETE_CB_ID Tx Half Complete Callback ID
  745.   *           @arg @ref HAL_UART_TX_COMPLETE_CB_ID Tx Complete Callback ID
  746.   *           @arg @ref HAL_UART_RX_HALFCOMPLETE_CB_ID Rx Half Complete Callback ID
  747.   *           @arg @ref HAL_UART_RX_COMPLETE_CB_ID Rx Complete Callback ID
  748.   *           @arg @ref HAL_UART_ERROR_CB_ID Error Callback ID
  749.   *           @arg @ref HAL_UART_ABORT_COMPLETE_CB_ID Abort Complete Callback ID
  750.   *           @arg @ref HAL_UART_ABORT_TRANSMIT_COMPLETE_CB_ID Abort Transmit Complete Callback ID
  751.   *           @arg @ref HAL_UART_ABORT_RECEIVE_COMPLETE_CB_ID Abort Receive Complete Callback ID
  752.   *           @arg @ref HAL_UART_WAKEUP_CB_ID Wakeup Callback ID
  753.   *           @arg @ref HAL_UART_MSPINIT_CB_ID MspInit Callback ID
  754.   *           @arg @ref HAL_UART_MSPDEINIT_CB_ID MspDeInit Callback ID
  755.   * @param  pCallback pointer to the Callback function
  756.   * @retval HAL status
  757.   */
  758. HAL_StatusTypeDef HAL_UART_RegisterCallback(UART_HandleTypeDef *huart, HAL_UART_CallbackIDTypeDef CallbackID,
  759.                                             pUART_CallbackTypeDef pCallback)
  760. {
  761.   HAL_StatusTypeDef status = HAL_OK;
  762.  
  763.   if (pCallback == NULL)
  764.   {
  765.     huart->ErrorCode |= HAL_UART_ERROR_INVALID_CALLBACK;
  766.  
  767.     return HAL_ERROR;
  768.   }
  769.  
  770.   __HAL_LOCK(huart);
  771.  
  772.   if (huart->gState == HAL_UART_STATE_READY)
  773.   {
  774.     switch (CallbackID)
  775.     {
  776.       case HAL_UART_TX_HALFCOMPLETE_CB_ID :
  777.         huart->TxHalfCpltCallback = pCallback;
  778.         break;
  779.  
  780.       case HAL_UART_TX_COMPLETE_CB_ID :
  781.         huart->TxCpltCallback = pCallback;
  782.         break;
  783.  
  784.       case HAL_UART_RX_HALFCOMPLETE_CB_ID :
  785.         huart->RxHalfCpltCallback = pCallback;
  786.         break;
  787.  
  788.       case HAL_UART_RX_COMPLETE_CB_ID :
  789.         huart->RxCpltCallback = pCallback;
  790.         break;
  791.  
  792.       case HAL_UART_ERROR_CB_ID :
  793.         huart->ErrorCallback = pCallback;
  794.         break;
  795.  
  796.       case HAL_UART_ABORT_COMPLETE_CB_ID :
  797.         huart->AbortCpltCallback = pCallback;
  798.         break;
  799.  
  800.       case HAL_UART_ABORT_TRANSMIT_COMPLETE_CB_ID :
  801.         huart->AbortTransmitCpltCallback = pCallback;
  802.         break;
  803.  
  804.       case HAL_UART_ABORT_RECEIVE_COMPLETE_CB_ID :
  805.         huart->AbortReceiveCpltCallback = pCallback;
  806.         break;
  807.  
  808. #if defined(USART_CR1_UESM)
  809. #if defined(USART_CR3_WUFIE)
  810.       case HAL_UART_WAKEUP_CB_ID :
  811.         huart->WakeupCallback = pCallback;
  812.         break;
  813.  
  814. #endif /* USART_CR3_WUFIE */
  815. #endif /* USART_CR1_UESM */
  816.  
  817.       case HAL_UART_MSPINIT_CB_ID :
  818.         huart->MspInitCallback = pCallback;
  819.         break;
  820.  
  821.       case HAL_UART_MSPDEINIT_CB_ID :
  822.         huart->MspDeInitCallback = pCallback;
  823.         break;
  824.  
  825.       default :
  826.         huart->ErrorCode |= HAL_UART_ERROR_INVALID_CALLBACK;
  827.  
  828.         status =  HAL_ERROR;
  829.         break;
  830.     }
  831.   }
  832.   else if (huart->gState == HAL_UART_STATE_RESET)
  833.   {
  834.     switch (CallbackID)
  835.     {
  836.       case HAL_UART_MSPINIT_CB_ID :
  837.         huart->MspInitCallback = pCallback;
  838.         break;
  839.  
  840.       case HAL_UART_MSPDEINIT_CB_ID :
  841.         huart->MspDeInitCallback = pCallback;
  842.         break;
  843.  
  844.       default :
  845.         huart->ErrorCode |= HAL_UART_ERROR_INVALID_CALLBACK;
  846.  
  847.         status =  HAL_ERROR;
  848.         break;
  849.     }
  850.   }
  851.   else
  852.   {
  853.     huart->ErrorCode |= HAL_UART_ERROR_INVALID_CALLBACK;
  854.  
  855.     status =  HAL_ERROR;
  856.   }
  857.  
  858.   __HAL_UNLOCK(huart);
  859.  
  860.   return status;
  861. }
  862.  
  863. /**
  864.   * @brief  Unregister an UART Callback
  865.   *         UART callaback is redirected to the weak predefined callback
  866.   * @param  huart uart handle
  867.   * @param  CallbackID ID of the callback to be unregistered
  868.   *         This parameter can be one of the following values:
  869.   *           @arg @ref HAL_UART_TX_HALFCOMPLETE_CB_ID Tx Half Complete Callback ID
  870.   *           @arg @ref HAL_UART_TX_COMPLETE_CB_ID Tx Complete Callback ID
  871.   *           @arg @ref HAL_UART_RX_HALFCOMPLETE_CB_ID Rx Half Complete Callback ID
  872.   *           @arg @ref HAL_UART_RX_COMPLETE_CB_ID Rx Complete Callback ID
  873.   *           @arg @ref HAL_UART_ERROR_CB_ID Error Callback ID
  874.   *           @arg @ref HAL_UART_ABORT_COMPLETE_CB_ID Abort Complete Callback ID
  875.   *           @arg @ref HAL_UART_ABORT_TRANSMIT_COMPLETE_CB_ID Abort Transmit Complete Callback ID
  876.   *           @arg @ref HAL_UART_ABORT_RECEIVE_COMPLETE_CB_ID Abort Receive Complete Callback ID
  877.   *           @arg @ref HAL_UART_WAKEUP_CB_ID Wakeup Callback ID
  878.   *           @arg @ref HAL_UART_MSPINIT_CB_ID MspInit Callback ID
  879.   *           @arg @ref HAL_UART_MSPDEINIT_CB_ID MspDeInit Callback ID
  880.   * @retval HAL status
  881.   */
  882. HAL_StatusTypeDef HAL_UART_UnRegisterCallback(UART_HandleTypeDef *huart, HAL_UART_CallbackIDTypeDef CallbackID)
  883. {
  884.   HAL_StatusTypeDef status = HAL_OK;
  885.  
  886.   __HAL_LOCK(huart);
  887.  
  888.   if (HAL_UART_STATE_READY == huart->gState)
  889.   {
  890.     switch (CallbackID)
  891.     {
  892.       case HAL_UART_TX_HALFCOMPLETE_CB_ID :
  893.         huart->TxHalfCpltCallback = HAL_UART_TxHalfCpltCallback;               /* Legacy weak  TxHalfCpltCallback    */
  894.         break;
  895.  
  896.       case HAL_UART_TX_COMPLETE_CB_ID :
  897.         huart->TxCpltCallback = HAL_UART_TxCpltCallback;                       /* Legacy weak TxCpltCallback         */
  898.         break;
  899.  
  900.       case HAL_UART_RX_HALFCOMPLETE_CB_ID :
  901.         huart->RxHalfCpltCallback = HAL_UART_RxHalfCpltCallback;               /* Legacy weak RxHalfCpltCallback     */
  902.         break;
  903.  
  904.       case HAL_UART_RX_COMPLETE_CB_ID :
  905.         huart->RxCpltCallback = HAL_UART_RxCpltCallback;                       /* Legacy weak RxCpltCallback         */
  906.         break;
  907.  
  908.       case HAL_UART_ERROR_CB_ID :
  909.         huart->ErrorCallback = HAL_UART_ErrorCallback;                         /* Legacy weak ErrorCallback          */
  910.         break;
  911.  
  912.       case HAL_UART_ABORT_COMPLETE_CB_ID :
  913.         huart->AbortCpltCallback = HAL_UART_AbortCpltCallback;                 /* Legacy weak AbortCpltCallback      */
  914.         break;
  915.  
  916.       case HAL_UART_ABORT_TRANSMIT_COMPLETE_CB_ID :
  917.         huart->AbortTransmitCpltCallback = HAL_UART_AbortTransmitCpltCallback; /* Legacy weak
  918.                                                                                   AbortTransmitCpltCallback          */
  919.         break;
  920.  
  921.       case HAL_UART_ABORT_RECEIVE_COMPLETE_CB_ID :
  922.         huart->AbortReceiveCpltCallback = HAL_UART_AbortReceiveCpltCallback;   /* Legacy weak
  923.                                                                                   AbortReceiveCpltCallback           */
  924.         break;
  925.  
  926. #if defined(USART_CR1_UESM)
  927. #if defined(USART_CR3_WUFIE)
  928.       case HAL_UART_WAKEUP_CB_ID :
  929.         huart->WakeupCallback = HAL_UARTEx_WakeupCallback;                     /* Legacy weak WakeupCallback         */
  930.         break;
  931.  
  932. #endif /* USART_CR3_WUFIE */
  933. #endif /* USART_CR1_UESM */
  934.       case HAL_UART_MSPINIT_CB_ID :
  935.         huart->MspInitCallback = HAL_UART_MspInit;                             /* Legacy weak MspInitCallback        */
  936.         break;
  937.  
  938.       case HAL_UART_MSPDEINIT_CB_ID :
  939.         huart->MspDeInitCallback = HAL_UART_MspDeInit;                         /* Legacy weak MspDeInitCallback      */
  940.         break;
  941.  
  942.       default :
  943.         huart->ErrorCode |= HAL_UART_ERROR_INVALID_CALLBACK;
  944.  
  945.         status =  HAL_ERROR;
  946.         break;
  947.     }
  948.   }
  949.   else if (HAL_UART_STATE_RESET == huart->gState)
  950.   {
  951.     switch (CallbackID)
  952.     {
  953.       case HAL_UART_MSPINIT_CB_ID :
  954.         huart->MspInitCallback = HAL_UART_MspInit;
  955.         break;
  956.  
  957.       case HAL_UART_MSPDEINIT_CB_ID :
  958.         huart->MspDeInitCallback = HAL_UART_MspDeInit;
  959.         break;
  960.  
  961.       default :
  962.         huart->ErrorCode |= HAL_UART_ERROR_INVALID_CALLBACK;
  963.  
  964.         status =  HAL_ERROR;
  965.         break;
  966.     }
  967.   }
  968.   else
  969.   {
  970.     huart->ErrorCode |= HAL_UART_ERROR_INVALID_CALLBACK;
  971.  
  972.     status =  HAL_ERROR;
  973.   }
  974.  
  975.   __HAL_UNLOCK(huart);
  976.  
  977.   return status;
  978. }
  979.  
  980. /**
  981.   * @brief  Register a User UART Rx Event Callback
  982.   *         To be used instead of the weak predefined callback
  983.   * @param  huart     Uart handle
  984.   * @param  pCallback Pointer to the Rx Event Callback function
  985.   * @retval HAL status
  986.   */
  987. HAL_StatusTypeDef HAL_UART_RegisterRxEventCallback(UART_HandleTypeDef *huart, pUART_RxEventCallbackTypeDef pCallback)
  988. {
  989.   HAL_StatusTypeDef status = HAL_OK;
  990.  
  991.   if (pCallback == NULL)
  992.   {
  993.     huart->ErrorCode |= HAL_UART_ERROR_INVALID_CALLBACK;
  994.  
  995.     return HAL_ERROR;
  996.   }
  997.  
  998.   /* Process locked */
  999.   __HAL_LOCK(huart);
  1000.  
  1001.   if (huart->gState == HAL_UART_STATE_READY)
  1002.   {
  1003.     huart->RxEventCallback = pCallback;
  1004.   }
  1005.   else
  1006.   {
  1007.     huart->ErrorCode |= HAL_UART_ERROR_INVALID_CALLBACK;
  1008.  
  1009.     status =  HAL_ERROR;
  1010.   }
  1011.  
  1012.   /* Release Lock */
  1013.   __HAL_UNLOCK(huart);
  1014.  
  1015.   return status;
  1016. }
  1017.  
  1018. /**
  1019.   * @brief  UnRegister the UART Rx Event Callback
  1020.   *         UART Rx Event Callback is redirected to the weak HAL_UARTEx_RxEventCallback() predefined callback
  1021.   * @param  huart     Uart handle
  1022.   * @retval HAL status
  1023.   */
  1024. HAL_StatusTypeDef HAL_UART_UnRegisterRxEventCallback(UART_HandleTypeDef *huart)
  1025. {
  1026.   HAL_StatusTypeDef status = HAL_OK;
  1027.  
  1028.   /* Process locked */
  1029.   __HAL_LOCK(huart);
  1030.  
  1031.   if (huart->gState == HAL_UART_STATE_READY)
  1032.   {
  1033.     huart->RxEventCallback = HAL_UARTEx_RxEventCallback; /* Legacy weak UART Rx Event Callback  */
  1034.   }
  1035.   else
  1036.   {
  1037.     huart->ErrorCode |= HAL_UART_ERROR_INVALID_CALLBACK;
  1038.  
  1039.     status =  HAL_ERROR;
  1040.   }
  1041.  
  1042.   /* Release Lock */
  1043.   __HAL_UNLOCK(huart);
  1044.   return status;
  1045. }
  1046.  
  1047. #endif /* USE_HAL_UART_REGISTER_CALLBACKS */
  1048.  
  1049. /**
  1050.   * @}
  1051.   */
  1052.  
  1053. /** @defgroup UART_Exported_Functions_Group2 IO operation functions
  1054.   * @brief UART Transmit/Receive functions
  1055.   *
  1056. @verbatim
  1057.  ===============================================================================
  1058.                       ##### IO operation functions #####
  1059.  ===============================================================================
  1060.     This subsection provides a set of functions allowing to manage the UART asynchronous
  1061.     and Half duplex data transfers.
  1062.  
  1063.     (#) There are two mode of transfer:
  1064.        (+) Blocking mode: The communication is performed in polling mode.
  1065.            The HAL status of all data processing is returned by the same function
  1066.            after finishing transfer.
  1067.        (+) Non-Blocking mode: The communication is performed using Interrupts
  1068.            or DMA, These API's return the HAL status.
  1069.            The end of the data processing will be indicated through the
  1070.            dedicated UART IRQ when using Interrupt mode or the DMA IRQ when
  1071.            using DMA mode.
  1072.            The HAL_UART_TxCpltCallback(), HAL_UART_RxCpltCallback() user callbacks
  1073.            will be executed respectively at the end of the transmit or Receive process
  1074.            The HAL_UART_ErrorCallback()user callback will be executed when a communication error is detected
  1075.  
  1076.     (#) Blocking mode API's are :
  1077.         (+) HAL_UART_Transmit()
  1078.         (+) HAL_UART_Receive()
  1079.  
  1080.     (#) Non-Blocking mode API's with Interrupt are :
  1081.         (+) HAL_UART_Transmit_IT()
  1082.         (+) HAL_UART_Receive_IT()
  1083.         (+) HAL_UART_IRQHandler()
  1084.  
  1085.     (#) Non-Blocking mode API's with DMA are :
  1086.         (+) HAL_UART_Transmit_DMA()
  1087.         (+) HAL_UART_Receive_DMA()
  1088.         (+) HAL_UART_DMAPause()
  1089.         (+) HAL_UART_DMAResume()
  1090.         (+) HAL_UART_DMAStop()
  1091.  
  1092.     (#) A set of Transfer Complete Callbacks are provided in Non_Blocking mode:
  1093.         (+) HAL_UART_TxHalfCpltCallback()
  1094.         (+) HAL_UART_TxCpltCallback()
  1095.         (+) HAL_UART_RxHalfCpltCallback()
  1096.         (+) HAL_UART_RxCpltCallback()
  1097.         (+) HAL_UART_ErrorCallback()
  1098.  
  1099.     (#) Non-Blocking mode transfers could be aborted using Abort API's :
  1100.         (+) HAL_UART_Abort()
  1101.         (+) HAL_UART_AbortTransmit()
  1102.         (+) HAL_UART_AbortReceive()
  1103.         (+) HAL_UART_Abort_IT()
  1104.         (+) HAL_UART_AbortTransmit_IT()
  1105.         (+) HAL_UART_AbortReceive_IT()
  1106.  
  1107.     (#) For Abort services based on interrupts (HAL_UART_Abortxxx_IT), a set of Abort Complete Callbacks are provided:
  1108.         (+) HAL_UART_AbortCpltCallback()
  1109.         (+) HAL_UART_AbortTransmitCpltCallback()
  1110.         (+) HAL_UART_AbortReceiveCpltCallback()
  1111.  
  1112.     (#) A Rx Event Reception Callback (Rx event notification) is available for Non_Blocking modes of enhanced
  1113.         reception services:
  1114.         (+) HAL_UARTEx_RxEventCallback()
  1115.  
  1116.     (#) In Non-Blocking mode transfers, possible errors are split into 2 categories.
  1117.         Errors are handled as follows :
  1118.        (+) Error is considered as Recoverable and non blocking : Transfer could go till end, but error severity is
  1119.            to be evaluated by user : this concerns Frame Error, Parity Error or Noise Error
  1120.            in Interrupt mode reception .
  1121.            Received character is then retrieved and stored in Rx buffer, Error code is set to allow user
  1122.            to identify error type, and HAL_UART_ErrorCallback() user callback is executed.
  1123.            Transfer is kept ongoing on UART side.
  1124.            If user wants to abort it, Abort services should be called by user.
  1125.        (+) Error is considered as Blocking : Transfer could not be completed properly and is aborted.
  1126.            This concerns Overrun Error In Interrupt mode reception and all errors in DMA mode.
  1127.            Error code is set to allow user to identify error type, and HAL_UART_ErrorCallback()
  1128.            user callback is executed.
  1129.  
  1130.     -@- In the Half duplex communication, it is forbidden to run the transmit
  1131.         and receive process in parallel, the UART state HAL_UART_STATE_BUSY_TX_RX can't be useful.
  1132.  
  1133. @endverbatim
  1134.   * @{
  1135.   */
  1136.  
  1137. /**
  1138.   * @brief Send an amount of data in blocking mode.
  1139.   * @note   When UART parity is not enabled (PCE = 0), and Word Length is configured to 9 bits (M1-M0 = 01),
  1140.   *         the sent data is handled as a set of u16. In this case, Size must indicate the number
  1141.   *         of u16 provided through pData.
  1142.   * @note   When UART parity is not enabled (PCE = 0), and Word Length is configured to 9 bits (M1-M0 = 01),
  1143.   *         address of user data buffer containing data to be sent, should be aligned on a half word frontier (16 bits)
  1144.   *         (as sent data will be handled using u16 pointer cast). Depending on compilation chain,
  1145.   *         use of specific alignment compilation directives or pragmas might be required
  1146.   *         to ensure proper alignment for pData.
  1147.   * @param huart   UART handle.
  1148.   * @param pData   Pointer to data buffer (u8 or u16 data elements).
  1149.   * @param Size    Amount of data elements (u8 or u16) to be sent.
  1150.   * @param Timeout Timeout duration.
  1151.   * @retval HAL status
  1152.   */
  1153. HAL_StatusTypeDef HAL_UART_Transmit(UART_HandleTypeDef *huart, uint8_t *pData, uint16_t Size, uint32_t Timeout)
  1154. {
  1155.   uint8_t  *pdata8bits;
  1156.   uint16_t *pdata16bits;
  1157.   uint32_t tickstart;
  1158.  
  1159.   /* Check that a Tx process is not already ongoing */
  1160.   if (huart->gState == HAL_UART_STATE_READY)
  1161.   {
  1162.     if ((pData == NULL) || (Size == 0U))
  1163.     {
  1164.       return  HAL_ERROR;
  1165.     }
  1166.  
  1167.     /* In case of 9bits/No Parity transfer, pData buffer provided as input parameter
  1168.        should be aligned on a u16 frontier, as data to be filled into TDR will be
  1169.        handled through a u16 cast. */
  1170.     if ((huart->Init.WordLength == UART_WORDLENGTH_9B) && (huart->Init.Parity == UART_PARITY_NONE))
  1171.     {
  1172.       if ((((uint32_t)pData) & 1U) != 0U)
  1173.       {
  1174.         return  HAL_ERROR;
  1175.       }
  1176.     }
  1177.  
  1178.     __HAL_LOCK(huart);
  1179.  
  1180.     huart->ErrorCode = HAL_UART_ERROR_NONE;
  1181.     huart->gState = HAL_UART_STATE_BUSY_TX;
  1182.  
  1183.     /* Init tickstart for timeout management */
  1184.     tickstart = HAL_GetTick();
  1185.  
  1186.     huart->TxXferSize  = Size;
  1187.     huart->TxXferCount = Size;
  1188.  
  1189.     /* In case of 9bits/No Parity transfer, pData needs to be handled as a uint16_t pointer */
  1190.     if ((huart->Init.WordLength == UART_WORDLENGTH_9B) && (huart->Init.Parity == UART_PARITY_NONE))
  1191.     {
  1192.       pdata8bits  = NULL;
  1193.       pdata16bits = (uint16_t *) pData;
  1194.     }
  1195.     else
  1196.     {
  1197.       pdata8bits  = pData;
  1198.       pdata16bits = NULL;
  1199.     }
  1200.  
  1201.     __HAL_UNLOCK(huart);
  1202.  
  1203.     while (huart->TxXferCount > 0U)
  1204.     {
  1205.       if (UART_WaitOnFlagUntilTimeout(huart, UART_FLAG_TXE, RESET, tickstart, Timeout) != HAL_OK)
  1206.       {
  1207.         return HAL_TIMEOUT;
  1208.       }
  1209.       if (pdata8bits == NULL)
  1210.       {
  1211.         huart->Instance->TDR = (uint16_t)(*pdata16bits & 0x01FFU);
  1212.         pdata16bits++;
  1213.       }
  1214.       else
  1215.       {
  1216.         huart->Instance->TDR = (uint8_t)(*pdata8bits & 0xFFU);
  1217.         pdata8bits++;
  1218.       }
  1219.       huart->TxXferCount--;
  1220.     }
  1221.  
  1222.     if (UART_WaitOnFlagUntilTimeout(huart, UART_FLAG_TC, RESET, tickstart, Timeout) != HAL_OK)
  1223.     {
  1224.       return HAL_TIMEOUT;
  1225.     }
  1226.  
  1227.     /* At end of Tx process, restore huart->gState to Ready */
  1228.     huart->gState = HAL_UART_STATE_READY;
  1229.  
  1230.     return HAL_OK;
  1231.   }
  1232.   else
  1233.   {
  1234.     return HAL_BUSY;
  1235.   }
  1236. }
  1237.  
  1238. /**
  1239.   * @brief Receive an amount of data in blocking mode.
  1240.   * @note   When UART parity is not enabled (PCE = 0), and Word Length is configured to 9 bits (M1-M0 = 01),
  1241.   *         the received data is handled as a set of u16. In this case, Size must indicate the number
  1242.   *         of u16 available through pData.
  1243.   * @note   When UART parity is not enabled (PCE = 0), and Word Length is configured to 9 bits (M1-M0 = 01),
  1244.   *         address of user data buffer for storing data to be received, should be aligned on a half word frontier
  1245.   *         (16 bits) (as received data will be handled using u16 pointer cast). Depending on compilation chain,
  1246.   *         use of specific alignment compilation directives or pragmas might be required
  1247.   *         to ensure proper alignment for pData.
  1248.   * @param huart   UART handle.
  1249.   * @param pData   Pointer to data buffer (u8 or u16 data elements).
  1250.   * @param Size    Amount of data elements (u8 or u16) to be received.
  1251.   * @param Timeout Timeout duration.
  1252.   * @retval HAL status
  1253.   */
  1254. HAL_StatusTypeDef HAL_UART_Receive(UART_HandleTypeDef *huart, uint8_t *pData, uint16_t Size, uint32_t Timeout)
  1255. {
  1256.   uint8_t  *pdata8bits;
  1257.   uint16_t *pdata16bits;
  1258.   uint16_t uhMask;
  1259.   uint32_t tickstart;
  1260.  
  1261.   /* Check that a Rx process is not already ongoing */
  1262.   if (huart->RxState == HAL_UART_STATE_READY)
  1263.   {
  1264.     if ((pData == NULL) || (Size == 0U))
  1265.     {
  1266.       return  HAL_ERROR;
  1267.     }
  1268.  
  1269.     /* In case of 9bits/No Parity transfer, pData buffer provided as input parameter
  1270.        should be aligned on a u16 frontier, as data to be received from RDR will be
  1271.        handled through a u16 cast. */
  1272.     if ((huart->Init.WordLength == UART_WORDLENGTH_9B) && (huart->Init.Parity == UART_PARITY_NONE))
  1273.     {
  1274.       if ((((uint32_t)pData) & 1U) != 0U)
  1275.       {
  1276.         return  HAL_ERROR;
  1277.       }
  1278.     }
  1279.  
  1280.     __HAL_LOCK(huart);
  1281.  
  1282.     huart->ErrorCode = HAL_UART_ERROR_NONE;
  1283.     huart->RxState = HAL_UART_STATE_BUSY_RX;
  1284.     huart->ReceptionType = HAL_UART_RECEPTION_STANDARD;
  1285.  
  1286.     /* Init tickstart for timeout management */
  1287.     tickstart = HAL_GetTick();
  1288.  
  1289.     huart->RxXferSize  = Size;
  1290.     huart->RxXferCount = Size;
  1291.  
  1292.     /* Computation of UART mask to apply to RDR register */
  1293.     UART_MASK_COMPUTATION(huart);
  1294.     uhMask = huart->Mask;
  1295.  
  1296.     /* In case of 9bits/No Parity transfer, pRxData needs to be handled as a uint16_t pointer */
  1297.     if ((huart->Init.WordLength == UART_WORDLENGTH_9B) && (huart->Init.Parity == UART_PARITY_NONE))
  1298.     {
  1299.       pdata8bits  = NULL;
  1300.       pdata16bits = (uint16_t *) pData;
  1301.     }
  1302.     else
  1303.     {
  1304.       pdata8bits  = pData;
  1305.       pdata16bits = NULL;
  1306.     }
  1307.  
  1308.     __HAL_UNLOCK(huart);
  1309.  
  1310.     /* as long as data have to be received */
  1311.     while (huart->RxXferCount > 0U)
  1312.     {
  1313.       if (UART_WaitOnFlagUntilTimeout(huart, UART_FLAG_RXNE, RESET, tickstart, Timeout) != HAL_OK)
  1314.       {
  1315.         return HAL_TIMEOUT;
  1316.       }
  1317.       if (pdata8bits == NULL)
  1318.       {
  1319.         *pdata16bits = (uint16_t)(huart->Instance->RDR & uhMask);
  1320.         pdata16bits++;
  1321.       }
  1322.       else
  1323.       {
  1324.         *pdata8bits = (uint8_t)(huart->Instance->RDR & (uint8_t)uhMask);
  1325.         pdata8bits++;
  1326.       }
  1327.       huart->RxXferCount--;
  1328.     }
  1329.  
  1330.     /* At end of Rx process, restore huart->RxState to Ready */
  1331.     huart->RxState = HAL_UART_STATE_READY;
  1332.  
  1333.     return HAL_OK;
  1334.   }
  1335.   else
  1336.   {
  1337.     return HAL_BUSY;
  1338.   }
  1339. }
  1340.  
  1341. /**
  1342.   * @brief Send an amount of data in interrupt mode.
  1343.   * @note   When UART parity is not enabled (PCE = 0), and Word Length is configured to 9 bits (M1-M0 = 01),
  1344.   *         the sent data is handled as a set of u16. In this case, Size must indicate the number
  1345.   *         of u16 provided through pData.
  1346.   * @note   When UART parity is not enabled (PCE = 0), and Word Length is configured to 9 bits (M1-M0 = 01),
  1347.   *         address of user data buffer containing data to be sent, should be aligned on a half word frontier (16 bits)
  1348.   *         (as sent data will be handled using u16 pointer cast). Depending on compilation chain,
  1349.   *         use of specific alignment compilation directives or pragmas might be required
  1350.   *         to ensure proper alignment for pData.
  1351.   * @param huart UART handle.
  1352.   * @param pData Pointer to data buffer (u8 or u16 data elements).
  1353.   * @param Size  Amount of data elements (u8 or u16) to be sent.
  1354.   * @retval HAL status
  1355.   */
  1356. HAL_StatusTypeDef HAL_UART_Transmit_IT(UART_HandleTypeDef *huart, uint8_t *pData, uint16_t Size)
  1357. {
  1358.   /* Check that a Tx process is not already ongoing */
  1359.   if (huart->gState == HAL_UART_STATE_READY)
  1360.   {
  1361.     if ((pData == NULL) || (Size == 0U))
  1362.     {
  1363.       return HAL_ERROR;
  1364.     }
  1365.  
  1366.     /* In case of 9bits/No Parity transfer, pData buffer provided as input parameter
  1367.        should be aligned on a u16 frontier, as data to be filled into TDR will be
  1368.        handled through a u16 cast. */
  1369.     if ((huart->Init.WordLength == UART_WORDLENGTH_9B) && (huart->Init.Parity == UART_PARITY_NONE))
  1370.     {
  1371.       if ((((uint32_t)pData) & 1U) != 0U)
  1372.       {
  1373.         return  HAL_ERROR;
  1374.       }
  1375.     }
  1376.  
  1377.     __HAL_LOCK(huart);
  1378.  
  1379.     huart->pTxBuffPtr  = pData;
  1380.     huart->TxXferSize  = Size;
  1381.     huart->TxXferCount = Size;
  1382.     huart->TxISR       = NULL;
  1383.  
  1384.     huart->ErrorCode = HAL_UART_ERROR_NONE;
  1385.     huart->gState = HAL_UART_STATE_BUSY_TX;
  1386.  
  1387.     /* Set the Tx ISR function pointer according to the data word length */
  1388.     if ((huart->Init.WordLength == UART_WORDLENGTH_9B) && (huart->Init.Parity == UART_PARITY_NONE))
  1389.     {
  1390.       huart->TxISR = UART_TxISR_16BIT;
  1391.     }
  1392.     else
  1393.     {
  1394.       huart->TxISR = UART_TxISR_8BIT;
  1395.     }
  1396.  
  1397.     __HAL_UNLOCK(huart);
  1398.  
  1399.     /* Enable the Transmit Data Register Empty interrupt */
  1400.     ATOMIC_SET_BIT(huart->Instance->CR1, USART_CR1_TXEIE);
  1401.  
  1402.     return HAL_OK;
  1403.   }
  1404.   else
  1405.   {
  1406.     return HAL_BUSY;
  1407.   }
  1408. }
  1409.  
  1410. /**
  1411.   * @brief Receive an amount of data in interrupt mode.
  1412.   * @note   When UART parity is not enabled (PCE = 0), and Word Length is configured to 9 bits (M1-M0 = 01),
  1413.   *         the received data is handled as a set of u16. In this case, Size must indicate the number
  1414.   *         of u16 available through pData.
  1415.   * @note   When UART parity is not enabled (PCE = 0), and Word Length is configured to 9 bits (M1-M0 = 01),
  1416.   *         address of user data buffer for storing data to be received, should be aligned on a half word frontier
  1417.   *         (16 bits) (as received data will be handled using u16 pointer cast). Depending on compilation chain,
  1418.   *         use of specific alignment compilation directives or pragmas might be required
  1419.   *         to ensure proper alignment for pData.
  1420.   * @param huart UART handle.
  1421.   * @param pData Pointer to data buffer (u8 or u16 data elements).
  1422.   * @param Size  Amount of data elements (u8 or u16) to be received.
  1423.   * @retval HAL status
  1424.   */
  1425. HAL_StatusTypeDef HAL_UART_Receive_IT(UART_HandleTypeDef *huart, uint8_t *pData, uint16_t Size)
  1426. {
  1427.   /* Check that a Rx process is not already ongoing */
  1428.   if (huart->RxState == HAL_UART_STATE_READY)
  1429.   {
  1430.     if ((pData == NULL) || (Size == 0U))
  1431.     {
  1432.       return HAL_ERROR;
  1433.     }
  1434.  
  1435.     /* In case of 9bits/No Parity transfer, pData buffer provided as input parameter
  1436.        should be aligned on a u16 frontier, as data to be received from RDR will be
  1437.        handled through a u16 cast. */
  1438.     if ((huart->Init.WordLength == UART_WORDLENGTH_9B) && (huart->Init.Parity == UART_PARITY_NONE))
  1439.     {
  1440.       if ((((uint32_t)pData) & 1U) != 0U)
  1441.       {
  1442.         return  HAL_ERROR;
  1443.       }
  1444.     }
  1445.  
  1446.     __HAL_LOCK(huart);
  1447.  
  1448.     /* Set Reception type to Standard reception */
  1449.     huart->ReceptionType = HAL_UART_RECEPTION_STANDARD;
  1450.  
  1451.     /* Check that USART RTOEN bit is set */
  1452.     if (READ_BIT(huart->Instance->CR2, USART_CR2_RTOEN) != 0U)
  1453.     {
  1454.       /* Enable the UART Receiver Timeout Interrupt */
  1455.       ATOMIC_SET_BIT(huart->Instance->CR1, USART_CR1_RTOIE);
  1456.     }
  1457.  
  1458.     return (UART_Start_Receive_IT(huart, pData, Size));
  1459.   }
  1460.   else
  1461.   {
  1462.     return HAL_BUSY;
  1463.   }
  1464. }
  1465.  
  1466. /**
  1467.   * @brief Send an amount of data in DMA mode.
  1468.   * @note   When UART parity is not enabled (PCE = 0), and Word Length is configured to 9 bits (M1-M0 = 01),
  1469.   *         the sent data is handled as a set of u16. In this case, Size must indicate the number
  1470.   *         of u16 provided through pData.
  1471.   * @note   When UART parity is not enabled (PCE = 0), and Word Length is configured to 9 bits (M1-M0 = 01),
  1472.   *         address of user data buffer containing data to be sent, should be aligned on a half word frontier (16 bits)
  1473.   *         (as sent data will be handled by DMA from halfword frontier). Depending on compilation chain,
  1474.   *         use of specific alignment compilation directives or pragmas might be required
  1475.   *         to ensure proper alignment for pData.
  1476.   * @param huart UART handle.
  1477.   * @param pData Pointer to data buffer (u8 or u16 data elements).
  1478.   * @param Size  Amount of data elements (u8 or u16) to be sent.
  1479.   * @retval HAL status
  1480.   */
  1481. HAL_StatusTypeDef HAL_UART_Transmit_DMA(UART_HandleTypeDef *huart, uint8_t *pData, uint16_t Size)
  1482. {
  1483.   /* Check that a Tx process is not already ongoing */
  1484.   if (huart->gState == HAL_UART_STATE_READY)
  1485.   {
  1486.     if ((pData == NULL) || (Size == 0U))
  1487.     {
  1488.       return HAL_ERROR;
  1489.     }
  1490.  
  1491.     /* In case of 9bits/No Parity transfer, pData buffer provided as input parameter
  1492.        should be aligned on a u16 frontier, as data copy into TDR will be
  1493.        handled by DMA from a u16 frontier. */
  1494.     if ((huart->Init.WordLength == UART_WORDLENGTH_9B) && (huart->Init.Parity == UART_PARITY_NONE))
  1495.     {
  1496.       if ((((uint32_t)pData) & 1U) != 0U)
  1497.       {
  1498.         return  HAL_ERROR;
  1499.       }
  1500.     }
  1501.  
  1502.     __HAL_LOCK(huart);
  1503.  
  1504.     huart->pTxBuffPtr  = pData;
  1505.     huart->TxXferSize  = Size;
  1506.     huart->TxXferCount = Size;
  1507.  
  1508.     huart->ErrorCode = HAL_UART_ERROR_NONE;
  1509.     huart->gState = HAL_UART_STATE_BUSY_TX;
  1510.  
  1511.     if (huart->hdmatx != NULL)
  1512.     {
  1513.       /* Set the UART DMA transfer complete callback */
  1514.       huart->hdmatx->XferCpltCallback = UART_DMATransmitCplt;
  1515.  
  1516.       /* Set the UART DMA Half transfer complete callback */
  1517.       huart->hdmatx->XferHalfCpltCallback = UART_DMATxHalfCplt;
  1518.  
  1519.       /* Set the DMA error callback */
  1520.       huart->hdmatx->XferErrorCallback = UART_DMAError;
  1521.  
  1522.       /* Set the DMA abort callback */
  1523.       huart->hdmatx->XferAbortCallback = NULL;
  1524.  
  1525.       /* Enable the UART transmit DMA channel */
  1526.       if (HAL_DMA_Start_IT(huart->hdmatx, (uint32_t)huart->pTxBuffPtr, (uint32_t)&huart->Instance->TDR, Size) != HAL_OK)
  1527.       {
  1528.         /* Set error code to DMA */
  1529.         huart->ErrorCode = HAL_UART_ERROR_DMA;
  1530.  
  1531.         __HAL_UNLOCK(huart);
  1532.  
  1533.         /* Restore huart->gState to ready */
  1534.         huart->gState = HAL_UART_STATE_READY;
  1535.  
  1536.         return HAL_ERROR;
  1537.       }
  1538.     }
  1539.     /* Clear the TC flag in the ICR register */
  1540.     __HAL_UART_CLEAR_FLAG(huart, UART_CLEAR_TCF);
  1541.  
  1542.     __HAL_UNLOCK(huart);
  1543.  
  1544.     /* Enable the DMA transfer for transmit request by setting the DMAT bit
  1545.     in the UART CR3 register */
  1546.     ATOMIC_SET_BIT(huart->Instance->CR3, USART_CR3_DMAT);
  1547.  
  1548.     return HAL_OK;
  1549.   }
  1550.   else
  1551.   {
  1552.     return HAL_BUSY;
  1553.   }
  1554. }
  1555.  
  1556. /**
  1557.   * @brief Receive an amount of data in DMA mode.
  1558.   * @note   When the UART parity is enabled (PCE = 1), the received data contain
  1559.   *         the parity bit (MSB position).
  1560.   * @note   When UART parity is not enabled (PCE = 0), and Word Length is configured to 9 bits (M1-M0 = 01),
  1561.   *         the received data is handled as a set of u16. In this case, Size must indicate the number
  1562.   *         of u16 available through pData.
  1563.   * @note   When UART parity is not enabled (PCE = 0), and Word Length is configured to 9 bits (M1-M0 = 01),
  1564.   *         address of user data buffer for storing data to be received, should be aligned on a half word frontier
  1565.   *         (16 bits) (as received data will be handled by DMA from halfword frontier). Depending on compilation chain,
  1566.   *         use of specific alignment compilation directives or pragmas might be required
  1567.   *         to ensure proper alignment for pData.
  1568.   * @param huart UART handle.
  1569.   * @param pData Pointer to data buffer (u8 or u16 data elements).
  1570.   * @param Size  Amount of data elements (u8 or u16) to be received.
  1571.   * @retval HAL status
  1572.   */
  1573. HAL_StatusTypeDef HAL_UART_Receive_DMA(UART_HandleTypeDef *huart, uint8_t *pData, uint16_t Size)
  1574. {
  1575.   /* Check that a Rx process is not already ongoing */
  1576.   if (huart->RxState == HAL_UART_STATE_READY)
  1577.   {
  1578.     if ((pData == NULL) || (Size == 0U))
  1579.     {
  1580.       return HAL_ERROR;
  1581.     }
  1582.  
  1583.     /* In case of 9bits/No Parity transfer, pData buffer provided as input parameter
  1584.        should be aligned on a u16 frontier, as data copy from RDR will be
  1585.        handled by DMA from a u16 frontier. */
  1586.     if ((huart->Init.WordLength == UART_WORDLENGTH_9B) && (huart->Init.Parity == UART_PARITY_NONE))
  1587.     {
  1588.       if ((((uint32_t)pData) & 1U) != 0U)
  1589.       {
  1590.         return  HAL_ERROR;
  1591.       }
  1592.     }
  1593.  
  1594.     __HAL_LOCK(huart);
  1595.  
  1596.     /* Set Reception type to Standard reception */
  1597.     huart->ReceptionType = HAL_UART_RECEPTION_STANDARD;
  1598.  
  1599.     /* Check that USART RTOEN bit is set */
  1600.     if (READ_BIT(huart->Instance->CR2, USART_CR2_RTOEN) != 0U)
  1601.     {
  1602.       /* Enable the UART Receiver Timeout Interrupt */
  1603.       ATOMIC_SET_BIT(huart->Instance->CR1, USART_CR1_RTOIE);
  1604.     }
  1605.  
  1606.     return (UART_Start_Receive_DMA(huart, pData, Size));
  1607.   }
  1608.   else
  1609.   {
  1610.     return HAL_BUSY;
  1611.   }
  1612. }
  1613.  
  1614. /**
  1615.   * @brief Pause the DMA Transfer.
  1616.   * @param huart UART handle.
  1617.   * @retval HAL status
  1618.   */
  1619. HAL_StatusTypeDef HAL_UART_DMAPause(UART_HandleTypeDef *huart)
  1620. {
  1621.   const HAL_UART_StateTypeDef gstate = huart->gState;
  1622.   const HAL_UART_StateTypeDef rxstate = huart->RxState;
  1623.  
  1624.   __HAL_LOCK(huart);
  1625.  
  1626.   if ((HAL_IS_BIT_SET(huart->Instance->CR3, USART_CR3_DMAT)) &&
  1627.       (gstate == HAL_UART_STATE_BUSY_TX))
  1628.   {
  1629.     /* Disable the UART DMA Tx request */
  1630.     ATOMIC_CLEAR_BIT(huart->Instance->CR3, USART_CR3_DMAT);
  1631.   }
  1632.   if ((HAL_IS_BIT_SET(huart->Instance->CR3, USART_CR3_DMAR)) &&
  1633.       (rxstate == HAL_UART_STATE_BUSY_RX))
  1634.   {
  1635.     /* Disable PE and ERR (Frame error, noise error, overrun error) interrupts */
  1636.     ATOMIC_CLEAR_BIT(huart->Instance->CR1, USART_CR1_PEIE);
  1637.     ATOMIC_CLEAR_BIT(huart->Instance->CR3, USART_CR3_EIE);
  1638.  
  1639.     /* Disable the UART DMA Rx request */
  1640.     ATOMIC_CLEAR_BIT(huart->Instance->CR3, USART_CR3_DMAR);
  1641.   }
  1642.  
  1643.   __HAL_UNLOCK(huart);
  1644.  
  1645.   return HAL_OK;
  1646. }
  1647.  
  1648. /**
  1649.   * @brief Resume the DMA Transfer.
  1650.   * @param huart UART handle.
  1651.   * @retval HAL status
  1652.   */
  1653. HAL_StatusTypeDef HAL_UART_DMAResume(UART_HandleTypeDef *huart)
  1654. {
  1655.   __HAL_LOCK(huart);
  1656.  
  1657.   if (huart->gState == HAL_UART_STATE_BUSY_TX)
  1658.   {
  1659.     /* Enable the UART DMA Tx request */
  1660.     ATOMIC_SET_BIT(huart->Instance->CR3, USART_CR3_DMAT);
  1661.   }
  1662.   if (huart->RxState == HAL_UART_STATE_BUSY_RX)
  1663.   {
  1664.     /* Clear the Overrun flag before resuming the Rx transfer */
  1665.     __HAL_UART_CLEAR_FLAG(huart, UART_CLEAR_OREF);
  1666.  
  1667.     /* Re-enable PE and ERR (Frame error, noise error, overrun error) interrupts */
  1668.     ATOMIC_SET_BIT(huart->Instance->CR1, USART_CR1_PEIE);
  1669.     ATOMIC_SET_BIT(huart->Instance->CR3, USART_CR3_EIE);
  1670.  
  1671.     /* Enable the UART DMA Rx request */
  1672.     ATOMIC_SET_BIT(huart->Instance->CR3, USART_CR3_DMAR);
  1673.   }
  1674.  
  1675.   __HAL_UNLOCK(huart);
  1676.  
  1677.   return HAL_OK;
  1678. }
  1679.  
  1680. /**
  1681.   * @brief Stop the DMA Transfer.
  1682.   * @param huart UART handle.
  1683.   * @retval HAL status
  1684.   */
  1685. HAL_StatusTypeDef HAL_UART_DMAStop(UART_HandleTypeDef *huart)
  1686. {
  1687.   /* The Lock is not implemented on this API to allow the user application
  1688.      to call the HAL UART API under callbacks HAL_UART_TxCpltCallback() / HAL_UART_RxCpltCallback() /
  1689.      HAL_UART_TxHalfCpltCallback / HAL_UART_RxHalfCpltCallback:
  1690.      indeed, when HAL_DMA_Abort() API is called, the DMA TX/RX Transfer or Half Transfer complete
  1691.      interrupt is generated if the DMA transfer interruption occurs at the middle or at the end of
  1692.      the stream and the corresponding call back is executed. */
  1693.  
  1694.   const HAL_UART_StateTypeDef gstate = huart->gState;
  1695.   const HAL_UART_StateTypeDef rxstate = huart->RxState;
  1696.  
  1697.   /* Stop UART DMA Tx request if ongoing */
  1698.   if ((HAL_IS_BIT_SET(huart->Instance->CR3, USART_CR3_DMAT)) &&
  1699.       (gstate == HAL_UART_STATE_BUSY_TX))
  1700.   {
  1701.     ATOMIC_CLEAR_BIT(huart->Instance->CR3, USART_CR3_DMAT);
  1702.  
  1703.     /* Abort the UART DMA Tx channel */
  1704.     if (huart->hdmatx != NULL)
  1705.     {
  1706.       if (HAL_DMA_Abort(huart->hdmatx) != HAL_OK)
  1707.       {
  1708.         if (HAL_DMA_GetError(huart->hdmatx) == HAL_DMA_ERROR_TIMEOUT)
  1709.         {
  1710.           /* Set error code to DMA */
  1711.           huart->ErrorCode = HAL_UART_ERROR_DMA;
  1712.  
  1713.           return HAL_TIMEOUT;
  1714.         }
  1715.       }
  1716.     }
  1717.  
  1718.     UART_EndTxTransfer(huart);
  1719.   }
  1720.  
  1721.   /* Stop UART DMA Rx request if ongoing */
  1722.   if ((HAL_IS_BIT_SET(huart->Instance->CR3, USART_CR3_DMAR)) &&
  1723.       (rxstate == HAL_UART_STATE_BUSY_RX))
  1724.   {
  1725.     ATOMIC_CLEAR_BIT(huart->Instance->CR3, USART_CR3_DMAR);
  1726.  
  1727.     /* Abort the UART DMA Rx channel */
  1728.     if (huart->hdmarx != NULL)
  1729.     {
  1730.       if (HAL_DMA_Abort(huart->hdmarx) != HAL_OK)
  1731.       {
  1732.         if (HAL_DMA_GetError(huart->hdmarx) == HAL_DMA_ERROR_TIMEOUT)
  1733.         {
  1734.           /* Set error code to DMA */
  1735.           huart->ErrorCode = HAL_UART_ERROR_DMA;
  1736.  
  1737.           return HAL_TIMEOUT;
  1738.         }
  1739.       }
  1740.     }
  1741.  
  1742.     UART_EndRxTransfer(huart);
  1743.   }
  1744.  
  1745.   return HAL_OK;
  1746. }
  1747.  
  1748. /**
  1749.   * @brief  Abort ongoing transfers (blocking mode).
  1750.   * @param  huart UART handle.
  1751.   * @note   This procedure could be used for aborting any ongoing transfer started in Interrupt or DMA mode.
  1752.   *         This procedure performs following operations :
  1753.   *           - Disable UART Interrupts (Tx and Rx)
  1754.   *           - Disable the DMA transfer in the peripheral register (if enabled)
  1755.   *           - Abort DMA transfer by calling HAL_DMA_Abort (in case of transfer in DMA mode)
  1756.   *           - Set handle State to READY
  1757.   * @note   This procedure is executed in blocking mode : when exiting function, Abort is considered as completed.
  1758.   * @retval HAL status
  1759.   */
  1760. HAL_StatusTypeDef HAL_UART_Abort(UART_HandleTypeDef *huart)
  1761. {
  1762.   /* Disable TXEIE, TCIE, RXNE, PE and ERR (Frame error, noise error, overrun error) interrupts */
  1763.   ATOMIC_CLEAR_BIT(huart->Instance->CR1, (USART_CR1_RXNEIE | USART_CR1_PEIE | USART_CR1_TXEIE | USART_CR1_TCIE));
  1764.   ATOMIC_CLEAR_BIT(huart->Instance->CR3, USART_CR3_EIE);
  1765.  
  1766.   /* If Reception till IDLE event was ongoing, disable IDLEIE interrupt */
  1767.   if (huart->ReceptionType == HAL_UART_RECEPTION_TOIDLE)
  1768.   {
  1769.     ATOMIC_CLEAR_BIT(huart->Instance->CR1, (USART_CR1_IDLEIE));
  1770.   }
  1771.  
  1772.   /* Disable the UART DMA Tx request if enabled */
  1773.   if (HAL_IS_BIT_SET(huart->Instance->CR3, USART_CR3_DMAT))
  1774.   {
  1775.     ATOMIC_CLEAR_BIT(huart->Instance->CR3, USART_CR3_DMAT);
  1776.  
  1777.     /* Abort the UART DMA Tx channel : use blocking DMA Abort API (no callback) */
  1778.     if (huart->hdmatx != NULL)
  1779.     {
  1780.       /* Set the UART DMA Abort callback to Null.
  1781.          No call back execution at end of DMA abort procedure */
  1782.       huart->hdmatx->XferAbortCallback = NULL;
  1783.  
  1784.       if (HAL_DMA_Abort(huart->hdmatx) != HAL_OK)
  1785.       {
  1786.         if (HAL_DMA_GetError(huart->hdmatx) == HAL_DMA_ERROR_TIMEOUT)
  1787.         {
  1788.           /* Set error code to DMA */
  1789.           huart->ErrorCode = HAL_UART_ERROR_DMA;
  1790.  
  1791.           return HAL_TIMEOUT;
  1792.         }
  1793.       }
  1794.     }
  1795.   }
  1796.  
  1797.   /* Disable the UART DMA Rx request if enabled */
  1798.   if (HAL_IS_BIT_SET(huart->Instance->CR3, USART_CR3_DMAR))
  1799.   {
  1800.     ATOMIC_CLEAR_BIT(huart->Instance->CR3, USART_CR3_DMAR);
  1801.  
  1802.     /* Abort the UART DMA Rx channel : use blocking DMA Abort API (no callback) */
  1803.     if (huart->hdmarx != NULL)
  1804.     {
  1805.       /* Set the UART DMA Abort callback to Null.
  1806.          No call back execution at end of DMA abort procedure */
  1807.       huart->hdmarx->XferAbortCallback = NULL;
  1808.  
  1809.       if (HAL_DMA_Abort(huart->hdmarx) != HAL_OK)
  1810.       {
  1811.         if (HAL_DMA_GetError(huart->hdmarx) == HAL_DMA_ERROR_TIMEOUT)
  1812.         {
  1813.           /* Set error code to DMA */
  1814.           huart->ErrorCode = HAL_UART_ERROR_DMA;
  1815.  
  1816.           return HAL_TIMEOUT;
  1817.         }
  1818.       }
  1819.     }
  1820.   }
  1821.  
  1822.   /* Reset Tx and Rx transfer counters */
  1823.   huart->TxXferCount = 0U;
  1824.   huart->RxXferCount = 0U;
  1825.  
  1826.   /* Clear the Error flags in the ICR register */
  1827.   __HAL_UART_CLEAR_FLAG(huart, UART_CLEAR_OREF | UART_CLEAR_NEF | UART_CLEAR_PEF | UART_CLEAR_FEF);
  1828.  
  1829.  
  1830.   /* Discard the received data */
  1831.   __HAL_UART_SEND_REQ(huart, UART_RXDATA_FLUSH_REQUEST);
  1832.  
  1833.   /* Restore huart->gState and huart->RxState to Ready */
  1834.   huart->gState  = HAL_UART_STATE_READY;
  1835.   huart->RxState = HAL_UART_STATE_READY;
  1836.   huart->ReceptionType = HAL_UART_RECEPTION_STANDARD;
  1837.  
  1838.   huart->ErrorCode = HAL_UART_ERROR_NONE;
  1839.  
  1840.   return HAL_OK;
  1841. }
  1842.  
  1843. /**
  1844.   * @brief  Abort ongoing Transmit transfer (blocking mode).
  1845.   * @param  huart UART handle.
  1846.   * @note   This procedure could be used for aborting any ongoing Tx transfer started in Interrupt or DMA mode.
  1847.   *         This procedure performs following operations :
  1848.   *           - Disable UART Interrupts (Tx)
  1849.   *           - Disable the DMA transfer in the peripheral register (if enabled)
  1850.   *           - Abort DMA transfer by calling HAL_DMA_Abort (in case of transfer in DMA mode)
  1851.   *           - Set handle State to READY
  1852.   * @note   This procedure is executed in blocking mode : when exiting function, Abort is considered as completed.
  1853.   * @retval HAL status
  1854.   */
  1855. HAL_StatusTypeDef HAL_UART_AbortTransmit(UART_HandleTypeDef *huart)
  1856. {
  1857.   /* Disable TXEIE and TCIE interrupts */
  1858.   ATOMIC_CLEAR_BIT(huart->Instance->CR1, (USART_CR1_TXEIE | USART_CR1_TCIE));
  1859.  
  1860.   /* Disable the UART DMA Tx request if enabled */
  1861.   if (HAL_IS_BIT_SET(huart->Instance->CR3, USART_CR3_DMAT))
  1862.   {
  1863.     ATOMIC_CLEAR_BIT(huart->Instance->CR3, USART_CR3_DMAT);
  1864.  
  1865.     /* Abort the UART DMA Tx channel : use blocking DMA Abort API (no callback) */
  1866.     if (huart->hdmatx != NULL)
  1867.     {
  1868.       /* Set the UART DMA Abort callback to Null.
  1869.          No call back execution at end of DMA abort procedure */
  1870.       huart->hdmatx->XferAbortCallback = NULL;
  1871.  
  1872.       if (HAL_DMA_Abort(huart->hdmatx) != HAL_OK)
  1873.       {
  1874.         if (HAL_DMA_GetError(huart->hdmatx) == HAL_DMA_ERROR_TIMEOUT)
  1875.         {
  1876.           /* Set error code to DMA */
  1877.           huart->ErrorCode = HAL_UART_ERROR_DMA;
  1878.  
  1879.           return HAL_TIMEOUT;
  1880.         }
  1881.       }
  1882.     }
  1883.   }
  1884.  
  1885.   /* Reset Tx transfer counter */
  1886.   huart->TxXferCount = 0U;
  1887.  
  1888.  
  1889.   /* Restore huart->gState to Ready */
  1890.   huart->gState = HAL_UART_STATE_READY;
  1891.  
  1892.   return HAL_OK;
  1893. }
  1894.  
  1895. /**
  1896.   * @brief  Abort ongoing Receive transfer (blocking mode).
  1897.   * @param  huart UART handle.
  1898.   * @note   This procedure could be used for aborting any ongoing Rx transfer started in Interrupt or DMA mode.
  1899.   *         This procedure performs following operations :
  1900.   *           - Disable UART Interrupts (Rx)
  1901.   *           - Disable the DMA transfer in the peripheral register (if enabled)
  1902.   *           - Abort DMA transfer by calling HAL_DMA_Abort (in case of transfer in DMA mode)
  1903.   *           - Set handle State to READY
  1904.   * @note   This procedure is executed in blocking mode : when exiting function, Abort is considered as completed.
  1905.   * @retval HAL status
  1906.   */
  1907. HAL_StatusTypeDef HAL_UART_AbortReceive(UART_HandleTypeDef *huart)
  1908. {
  1909.   /* Disable RXNE, PE and ERR (Frame error, noise error, overrun error) interrupts */
  1910.   ATOMIC_CLEAR_BIT(huart->Instance->CR1, (USART_CR1_RXNEIE | USART_CR1_PEIE));
  1911.   ATOMIC_CLEAR_BIT(huart->Instance->CR3, USART_CR3_EIE);
  1912.  
  1913.   /* If Reception till IDLE event was ongoing, disable IDLEIE interrupt */
  1914.   if (huart->ReceptionType == HAL_UART_RECEPTION_TOIDLE)
  1915.   {
  1916.     ATOMIC_CLEAR_BIT(huart->Instance->CR1, (USART_CR1_IDLEIE));
  1917.   }
  1918.  
  1919.   /* Disable the UART DMA Rx request if enabled */
  1920.   if (HAL_IS_BIT_SET(huart->Instance->CR3, USART_CR3_DMAR))
  1921.   {
  1922.     ATOMIC_CLEAR_BIT(huart->Instance->CR3, USART_CR3_DMAR);
  1923.  
  1924.     /* Abort the UART DMA Rx channel : use blocking DMA Abort API (no callback) */
  1925.     if (huart->hdmarx != NULL)
  1926.     {
  1927.       /* Set the UART DMA Abort callback to Null.
  1928.          No call back execution at end of DMA abort procedure */
  1929.       huart->hdmarx->XferAbortCallback = NULL;
  1930.  
  1931.       if (HAL_DMA_Abort(huart->hdmarx) != HAL_OK)
  1932.       {
  1933.         if (HAL_DMA_GetError(huart->hdmarx) == HAL_DMA_ERROR_TIMEOUT)
  1934.         {
  1935.           /* Set error code to DMA */
  1936.           huart->ErrorCode = HAL_UART_ERROR_DMA;
  1937.  
  1938.           return HAL_TIMEOUT;
  1939.         }
  1940.       }
  1941.     }
  1942.   }
  1943.  
  1944.   /* Reset Rx transfer counter */
  1945.   huart->RxXferCount = 0U;
  1946.  
  1947.   /* Clear the Error flags in the ICR register */
  1948.   __HAL_UART_CLEAR_FLAG(huart, UART_CLEAR_OREF | UART_CLEAR_NEF | UART_CLEAR_PEF | UART_CLEAR_FEF);
  1949.  
  1950.   /* Discard the received data */
  1951.   __HAL_UART_SEND_REQ(huart, UART_RXDATA_FLUSH_REQUEST);
  1952.  
  1953.   /* Restore huart->RxState to Ready */
  1954.   huart->RxState = HAL_UART_STATE_READY;
  1955.   huart->ReceptionType = HAL_UART_RECEPTION_STANDARD;
  1956.  
  1957.   return HAL_OK;
  1958. }
  1959.  
  1960. /**
  1961.   * @brief  Abort ongoing transfers (Interrupt mode).
  1962.   * @param  huart UART handle.
  1963.   * @note   This procedure could be used for aborting any ongoing transfer started in Interrupt or DMA mode.
  1964.   *         This procedure performs following operations :
  1965.   *           - Disable UART Interrupts (Tx and Rx)
  1966.   *           - Disable the DMA transfer in the peripheral register (if enabled)
  1967.   *           - Abort DMA transfer by calling HAL_DMA_Abort_IT (in case of transfer in DMA mode)
  1968.   *           - Set handle State to READY
  1969.   *           - At abort completion, call user abort complete callback
  1970.   * @note   This procedure is executed in Interrupt mode, meaning that abort procedure could be
  1971.   *         considered as completed only when user abort complete callback is executed (not when exiting function).
  1972.   * @retval HAL status
  1973.   */
  1974. HAL_StatusTypeDef HAL_UART_Abort_IT(UART_HandleTypeDef *huart)
  1975. {
  1976.   uint32_t abortcplt = 1U;
  1977.  
  1978.   /* Disable interrupts */
  1979.   ATOMIC_CLEAR_BIT(huart->Instance->CR1, (USART_CR1_RXNEIE | USART_CR1_PEIE | USART_CR1_TXEIE | USART_CR1_TCIE));
  1980.   ATOMIC_CLEAR_BIT(huart->Instance->CR3, USART_CR3_EIE);
  1981.  
  1982.   /* If Reception till IDLE event was ongoing, disable IDLEIE interrupt */
  1983.   if (huart->ReceptionType == HAL_UART_RECEPTION_TOIDLE)
  1984.   {
  1985.     ATOMIC_CLEAR_BIT(huart->Instance->CR1, (USART_CR1_IDLEIE));
  1986.   }
  1987.  
  1988.   /* If DMA Tx and/or DMA Rx Handles are associated to UART Handle, DMA Abort complete callbacks should be initialised
  1989.      before any call to DMA Abort functions */
  1990.   /* DMA Tx Handle is valid */
  1991.   if (huart->hdmatx != NULL)
  1992.   {
  1993.     /* Set DMA Abort Complete callback if UART DMA Tx request if enabled.
  1994.        Otherwise, set it to NULL */
  1995.     if (HAL_IS_BIT_SET(huart->Instance->CR3, USART_CR3_DMAT))
  1996.     {
  1997.       huart->hdmatx->XferAbortCallback = UART_DMATxAbortCallback;
  1998.     }
  1999.     else
  2000.     {
  2001.       huart->hdmatx->XferAbortCallback = NULL;
  2002.     }
  2003.   }
  2004.   /* DMA Rx Handle is valid */
  2005.   if (huart->hdmarx != NULL)
  2006.   {
  2007.     /* Set DMA Abort Complete callback if UART DMA Rx request if enabled.
  2008.        Otherwise, set it to NULL */
  2009.     if (HAL_IS_BIT_SET(huart->Instance->CR3, USART_CR3_DMAR))
  2010.     {
  2011.       huart->hdmarx->XferAbortCallback = UART_DMARxAbortCallback;
  2012.     }
  2013.     else
  2014.     {
  2015.       huart->hdmarx->XferAbortCallback = NULL;
  2016.     }
  2017.   }
  2018.  
  2019.   /* Disable the UART DMA Tx request if enabled */
  2020.   if (HAL_IS_BIT_SET(huart->Instance->CR3, USART_CR3_DMAT))
  2021.   {
  2022.     /* Disable DMA Tx at UART level */
  2023.     ATOMIC_CLEAR_BIT(huart->Instance->CR3, USART_CR3_DMAT);
  2024.  
  2025.     /* Abort the UART DMA Tx channel : use non blocking DMA Abort API (callback) */
  2026.     if (huart->hdmatx != NULL)
  2027.     {
  2028.       /* UART Tx DMA Abort callback has already been initialised :
  2029.          will lead to call HAL_UART_AbortCpltCallback() at end of DMA abort procedure */
  2030.  
  2031.       /* Abort DMA TX */
  2032.       if (HAL_DMA_Abort_IT(huart->hdmatx) != HAL_OK)
  2033.       {
  2034.         huart->hdmatx->XferAbortCallback = NULL;
  2035.       }
  2036.       else
  2037.       {
  2038.         abortcplt = 0U;
  2039.       }
  2040.     }
  2041.   }
  2042.  
  2043.   /* Disable the UART DMA Rx request if enabled */
  2044.   if (HAL_IS_BIT_SET(huart->Instance->CR3, USART_CR3_DMAR))
  2045.   {
  2046.     ATOMIC_CLEAR_BIT(huart->Instance->CR3, USART_CR3_DMAR);
  2047.  
  2048.     /* Abort the UART DMA Rx channel : use non blocking DMA Abort API (callback) */
  2049.     if (huart->hdmarx != NULL)
  2050.     {
  2051.       /* UART Rx DMA Abort callback has already been initialised :
  2052.          will lead to call HAL_UART_AbortCpltCallback() at end of DMA abort procedure */
  2053.  
  2054.       /* Abort DMA RX */
  2055.       if (HAL_DMA_Abort_IT(huart->hdmarx) != HAL_OK)
  2056.       {
  2057.         huart->hdmarx->XferAbortCallback = NULL;
  2058.         abortcplt = 1U;
  2059.       }
  2060.       else
  2061.       {
  2062.         abortcplt = 0U;
  2063.       }
  2064.     }
  2065.   }
  2066.  
  2067.   /* if no DMA abort complete callback execution is required => call user Abort Complete callback */
  2068.   if (abortcplt == 1U)
  2069.   {
  2070.     /* Reset Tx and Rx transfer counters */
  2071.     huart->TxXferCount = 0U;
  2072.     huart->RxXferCount = 0U;
  2073.  
  2074.     /* Clear ISR function pointers */
  2075.     huart->RxISR = NULL;
  2076.     huart->TxISR = NULL;
  2077.  
  2078.     /* Reset errorCode */
  2079.     huart->ErrorCode = HAL_UART_ERROR_NONE;
  2080.  
  2081.     /* Clear the Error flags in the ICR register */
  2082.     __HAL_UART_CLEAR_FLAG(huart, UART_CLEAR_OREF | UART_CLEAR_NEF | UART_CLEAR_PEF | UART_CLEAR_FEF);
  2083.  
  2084.  
  2085.     /* Discard the received data */
  2086.     __HAL_UART_SEND_REQ(huart, UART_RXDATA_FLUSH_REQUEST);
  2087.  
  2088.     /* Restore huart->gState and huart->RxState to Ready */
  2089.     huart->gState  = HAL_UART_STATE_READY;
  2090.     huart->RxState = HAL_UART_STATE_READY;
  2091.     huart->ReceptionType = HAL_UART_RECEPTION_STANDARD;
  2092.  
  2093.     /* As no DMA to be aborted, call directly user Abort complete callback */
  2094. #if (USE_HAL_UART_REGISTER_CALLBACKS == 1)
  2095.     /* Call registered Abort complete callback */
  2096.     huart->AbortCpltCallback(huart);
  2097. #else
  2098.     /* Call legacy weak Abort complete callback */
  2099.     HAL_UART_AbortCpltCallback(huart);
  2100. #endif /* USE_HAL_UART_REGISTER_CALLBACKS */
  2101.   }
  2102.  
  2103.   return HAL_OK;
  2104. }
  2105.  
  2106. /**
  2107.   * @brief  Abort ongoing Transmit transfer (Interrupt mode).
  2108.   * @param  huart UART handle.
  2109.   * @note   This procedure could be used for aborting any ongoing Tx transfer started in Interrupt or DMA mode.
  2110.   *         This procedure performs following operations :
  2111.   *           - Disable UART Interrupts (Tx)
  2112.   *           - Disable the DMA transfer in the peripheral register (if enabled)
  2113.   *           - Abort DMA transfer by calling HAL_DMA_Abort_IT (in case of transfer in DMA mode)
  2114.   *           - Set handle State to READY
  2115.   *           - At abort completion, call user abort complete callback
  2116.   * @note   This procedure is executed in Interrupt mode, meaning that abort procedure could be
  2117.   *         considered as completed only when user abort complete callback is executed (not when exiting function).
  2118.   * @retval HAL status
  2119.   */
  2120. HAL_StatusTypeDef HAL_UART_AbortTransmit_IT(UART_HandleTypeDef *huart)
  2121. {
  2122.   /* Disable interrupts */
  2123.   ATOMIC_CLEAR_BIT(huart->Instance->CR1, (USART_CR1_TXEIE | USART_CR1_TCIE));
  2124.  
  2125.   /* Disable the UART DMA Tx request if enabled */
  2126.   if (HAL_IS_BIT_SET(huart->Instance->CR3, USART_CR3_DMAT))
  2127.   {
  2128.     ATOMIC_CLEAR_BIT(huart->Instance->CR3, USART_CR3_DMAT);
  2129.  
  2130.     /* Abort the UART DMA Tx channel : use non blocking DMA Abort API (callback) */
  2131.     if (huart->hdmatx != NULL)
  2132.     {
  2133.       /* Set the UART DMA Abort callback :
  2134.          will lead to call HAL_UART_AbortCpltCallback() at end of DMA abort procedure */
  2135.       huart->hdmatx->XferAbortCallback = UART_DMATxOnlyAbortCallback;
  2136.  
  2137.       /* Abort DMA TX */
  2138.       if (HAL_DMA_Abort_IT(huart->hdmatx) != HAL_OK)
  2139.       {
  2140.         /* Call Directly huart->hdmatx->XferAbortCallback function in case of error */
  2141.         huart->hdmatx->XferAbortCallback(huart->hdmatx);
  2142.       }
  2143.     }
  2144.     else
  2145.     {
  2146.       /* Reset Tx transfer counter */
  2147.       huart->TxXferCount = 0U;
  2148.  
  2149.       /* Clear TxISR function pointers */
  2150.       huart->TxISR = NULL;
  2151.  
  2152.       /* Restore huart->gState to Ready */
  2153.       huart->gState = HAL_UART_STATE_READY;
  2154.  
  2155.       /* As no DMA to be aborted, call directly user Abort complete callback */
  2156. #if (USE_HAL_UART_REGISTER_CALLBACKS == 1)
  2157.       /* Call registered Abort Transmit Complete Callback */
  2158.       huart->AbortTransmitCpltCallback(huart);
  2159. #else
  2160.       /* Call legacy weak Abort Transmit Complete Callback */
  2161.       HAL_UART_AbortTransmitCpltCallback(huart);
  2162. #endif /* USE_HAL_UART_REGISTER_CALLBACKS */
  2163.     }
  2164.   }
  2165.   else
  2166.   {
  2167.     /* Reset Tx transfer counter */
  2168.     huart->TxXferCount = 0U;
  2169.  
  2170.     /* Clear TxISR function pointers */
  2171.     huart->TxISR = NULL;
  2172.  
  2173.  
  2174.     /* Restore huart->gState to Ready */
  2175.     huart->gState = HAL_UART_STATE_READY;
  2176.  
  2177.     /* As no DMA to be aborted, call directly user Abort complete callback */
  2178. #if (USE_HAL_UART_REGISTER_CALLBACKS == 1)
  2179.     /* Call registered Abort Transmit Complete Callback */
  2180.     huart->AbortTransmitCpltCallback(huart);
  2181. #else
  2182.     /* Call legacy weak Abort Transmit Complete Callback */
  2183.     HAL_UART_AbortTransmitCpltCallback(huart);
  2184. #endif /* USE_HAL_UART_REGISTER_CALLBACKS */
  2185.   }
  2186.  
  2187.   return HAL_OK;
  2188. }
  2189.  
  2190. /**
  2191.   * @brief  Abort ongoing Receive transfer (Interrupt mode).
  2192.   * @param  huart UART handle.
  2193.   * @note   This procedure could be used for aborting any ongoing Rx transfer started in Interrupt or DMA mode.
  2194.   *         This procedure performs following operations :
  2195.   *           - Disable UART Interrupts (Rx)
  2196.   *           - Disable the DMA transfer in the peripheral register (if enabled)
  2197.   *           - Abort DMA transfer by calling HAL_DMA_Abort_IT (in case of transfer in DMA mode)
  2198.   *           - Set handle State to READY
  2199.   *           - At abort completion, call user abort complete callback
  2200.   * @note   This procedure is executed in Interrupt mode, meaning that abort procedure could be
  2201.   *         considered as completed only when user abort complete callback is executed (not when exiting function).
  2202.   * @retval HAL status
  2203.   */
  2204. HAL_StatusTypeDef HAL_UART_AbortReceive_IT(UART_HandleTypeDef *huart)
  2205. {
  2206.   /* Disable RXNE, PE and ERR (Frame error, noise error, overrun error) interrupts */
  2207.   ATOMIC_CLEAR_BIT(huart->Instance->CR1, (USART_CR1_RXNEIE | USART_CR1_PEIE));
  2208.   ATOMIC_CLEAR_BIT(huart->Instance->CR3, USART_CR3_EIE);
  2209.  
  2210.   /* If Reception till IDLE event was ongoing, disable IDLEIE interrupt */
  2211.   if (huart->ReceptionType == HAL_UART_RECEPTION_TOIDLE)
  2212.   {
  2213.     ATOMIC_CLEAR_BIT(huart->Instance->CR1, (USART_CR1_IDLEIE));
  2214.   }
  2215.  
  2216.   /* Disable the UART DMA Rx request if enabled */
  2217.   if (HAL_IS_BIT_SET(huart->Instance->CR3, USART_CR3_DMAR))
  2218.   {
  2219.     ATOMIC_CLEAR_BIT(huart->Instance->CR3, USART_CR3_DMAR);
  2220.  
  2221.     /* Abort the UART DMA Rx channel : use non blocking DMA Abort API (callback) */
  2222.     if (huart->hdmarx != NULL)
  2223.     {
  2224.       /* Set the UART DMA Abort callback :
  2225.          will lead to call HAL_UART_AbortCpltCallback() at end of DMA abort procedure */
  2226.       huart->hdmarx->XferAbortCallback = UART_DMARxOnlyAbortCallback;
  2227.  
  2228.       /* Abort DMA RX */
  2229.       if (HAL_DMA_Abort_IT(huart->hdmarx) != HAL_OK)
  2230.       {
  2231.         /* Call Directly huart->hdmarx->XferAbortCallback function in case of error */
  2232.         huart->hdmarx->XferAbortCallback(huart->hdmarx);
  2233.       }
  2234.     }
  2235.     else
  2236.     {
  2237.       /* Reset Rx transfer counter */
  2238.       huart->RxXferCount = 0U;
  2239.  
  2240.       /* Clear RxISR function pointer */
  2241.       huart->pRxBuffPtr = NULL;
  2242.  
  2243.       /* Clear the Error flags in the ICR register */
  2244.       __HAL_UART_CLEAR_FLAG(huart, UART_CLEAR_OREF | UART_CLEAR_NEF | UART_CLEAR_PEF | UART_CLEAR_FEF);
  2245.  
  2246.       /* Discard the received data */
  2247.       __HAL_UART_SEND_REQ(huart, UART_RXDATA_FLUSH_REQUEST);
  2248.  
  2249.       /* Restore huart->RxState to Ready */
  2250.       huart->RxState = HAL_UART_STATE_READY;
  2251.       huart->ReceptionType = HAL_UART_RECEPTION_STANDARD;
  2252.  
  2253.       /* As no DMA to be aborted, call directly user Abort complete callback */
  2254. #if (USE_HAL_UART_REGISTER_CALLBACKS == 1)
  2255.       /* Call registered Abort Receive Complete Callback */
  2256.       huart->AbortReceiveCpltCallback(huart);
  2257. #else
  2258.       /* Call legacy weak Abort Receive Complete Callback */
  2259.       HAL_UART_AbortReceiveCpltCallback(huart);
  2260. #endif /* USE_HAL_UART_REGISTER_CALLBACKS */
  2261.     }
  2262.   }
  2263.   else
  2264.   {
  2265.     /* Reset Rx transfer counter */
  2266.     huart->RxXferCount = 0U;
  2267.  
  2268.     /* Clear RxISR function pointer */
  2269.     huart->pRxBuffPtr = NULL;
  2270.  
  2271.     /* Clear the Error flags in the ICR register */
  2272.     __HAL_UART_CLEAR_FLAG(huart, UART_CLEAR_OREF | UART_CLEAR_NEF | UART_CLEAR_PEF | UART_CLEAR_FEF);
  2273.  
  2274.     /* Restore huart->RxState to Ready */
  2275.     huart->RxState = HAL_UART_STATE_READY;
  2276.     huart->ReceptionType = HAL_UART_RECEPTION_STANDARD;
  2277.  
  2278.     /* As no DMA to be aborted, call directly user Abort complete callback */
  2279. #if (USE_HAL_UART_REGISTER_CALLBACKS == 1)
  2280.     /* Call registered Abort Receive Complete Callback */
  2281.     huart->AbortReceiveCpltCallback(huart);
  2282. #else
  2283.     /* Call legacy weak Abort Receive Complete Callback */
  2284.     HAL_UART_AbortReceiveCpltCallback(huart);
  2285. #endif /* USE_HAL_UART_REGISTER_CALLBACKS */
  2286.   }
  2287.  
  2288.   return HAL_OK;
  2289. }
  2290.  
  2291. /**
  2292.   * @brief Handle UART interrupt request.
  2293.   * @param huart UART handle.
  2294.   * @retval None
  2295.   */
  2296. void HAL_UART_IRQHandler(UART_HandleTypeDef *huart)
  2297. {
  2298.   uint32_t isrflags   = READ_REG(huart->Instance->ISR);
  2299.   uint32_t cr1its     = READ_REG(huart->Instance->CR1);
  2300.   uint32_t cr3its     = READ_REG(huart->Instance->CR3);
  2301.  
  2302.   uint32_t errorflags;
  2303.   uint32_t errorcode;
  2304.  
  2305.   /* If no error occurs */
  2306.   errorflags = (isrflags & (uint32_t)(USART_ISR_PE | USART_ISR_FE | USART_ISR_ORE | USART_ISR_NE | USART_ISR_RTOF));
  2307.   if (errorflags == 0U)
  2308.   {
  2309.     /* UART in mode Receiver ---------------------------------------------------*/
  2310.     if (((isrflags & USART_ISR_RXNE) != 0U)
  2311.         && ((cr1its & USART_CR1_RXNEIE) != 0U))
  2312.     {
  2313.       if (huart->RxISR != NULL)
  2314.       {
  2315.         huart->RxISR(huart);
  2316.       }
  2317.       return;
  2318.     }
  2319.   }
  2320.  
  2321.   /* If some errors occur */
  2322.   if ((errorflags != 0U)
  2323.       && (((cr3its & USART_CR3_EIE) != 0U)
  2324.           || ((cr1its & (USART_CR1_RXNEIE | USART_CR1_PEIE | USART_CR1_RTOIE)) != 0U)))
  2325.   {
  2326.     /* UART parity error interrupt occurred -------------------------------------*/
  2327.     if (((isrflags & USART_ISR_PE) != 0U) && ((cr1its & USART_CR1_PEIE) != 0U))
  2328.     {
  2329.       __HAL_UART_CLEAR_FLAG(huart, UART_CLEAR_PEF);
  2330.  
  2331.       huart->ErrorCode |= HAL_UART_ERROR_PE;
  2332.     }
  2333.  
  2334.     /* UART frame error interrupt occurred --------------------------------------*/
  2335.     if (((isrflags & USART_ISR_FE) != 0U) && ((cr3its & USART_CR3_EIE) != 0U))
  2336.     {
  2337.       __HAL_UART_CLEAR_FLAG(huart, UART_CLEAR_FEF);
  2338.  
  2339.       huart->ErrorCode |= HAL_UART_ERROR_FE;
  2340.     }
  2341.  
  2342.     /* UART noise error interrupt occurred --------------------------------------*/
  2343.     if (((isrflags & USART_ISR_NE) != 0U) && ((cr3its & USART_CR3_EIE) != 0U))
  2344.     {
  2345.       __HAL_UART_CLEAR_FLAG(huart, UART_CLEAR_NEF);
  2346.  
  2347.       huart->ErrorCode |= HAL_UART_ERROR_NE;
  2348.     }
  2349.  
  2350.     /* UART Over-Run interrupt occurred -----------------------------------------*/
  2351.     if (((isrflags & USART_ISR_ORE) != 0U)
  2352.         && (((cr1its & USART_CR1_RXNEIE) != 0U) ||
  2353.             ((cr3its & USART_CR3_EIE) != 0U)))
  2354.     {
  2355.       __HAL_UART_CLEAR_FLAG(huart, UART_CLEAR_OREF);
  2356.  
  2357.       huart->ErrorCode |= HAL_UART_ERROR_ORE;
  2358.     }
  2359.  
  2360.     /* UART Receiver Timeout interrupt occurred ---------------------------------*/
  2361.     if (((isrflags & USART_ISR_RTOF) != 0U) && ((cr1its & USART_CR1_RTOIE) != 0U))
  2362.     {
  2363.       __HAL_UART_CLEAR_FLAG(huart, UART_CLEAR_RTOF);
  2364.  
  2365.       huart->ErrorCode |= HAL_UART_ERROR_RTO;
  2366.     }
  2367.  
  2368.     /* Call UART Error Call back function if need be ----------------------------*/
  2369.     if (huart->ErrorCode != HAL_UART_ERROR_NONE)
  2370.     {
  2371.       /* UART in mode Receiver --------------------------------------------------*/
  2372.       if (((isrflags & USART_ISR_RXNE) != 0U)
  2373.           && ((cr1its & USART_CR1_RXNEIE) != 0U))
  2374.       {
  2375.         if (huart->RxISR != NULL)
  2376.         {
  2377.           huart->RxISR(huart);
  2378.         }
  2379.       }
  2380.  
  2381.       /* If Error is to be considered as blocking :
  2382.           - Receiver Timeout error in Reception
  2383.           - Overrun error in Reception
  2384.           - any error occurs in DMA mode reception
  2385.       */
  2386.       errorcode = huart->ErrorCode;
  2387.       if ((HAL_IS_BIT_SET(huart->Instance->CR3, USART_CR3_DMAR)) ||
  2388.           ((errorcode & (HAL_UART_ERROR_RTO | HAL_UART_ERROR_ORE)) != 0U))
  2389.       {
  2390.         /* Blocking error : transfer is aborted
  2391.            Set the UART state ready to be able to start again the process,
  2392.            Disable Rx Interrupts, and disable Rx DMA request, if ongoing */
  2393.         UART_EndRxTransfer(huart);
  2394.  
  2395.         /* Disable the UART DMA Rx request if enabled */
  2396.         if (HAL_IS_BIT_SET(huart->Instance->CR3, USART_CR3_DMAR))
  2397.         {
  2398.           ATOMIC_CLEAR_BIT(huart->Instance->CR3, USART_CR3_DMAR);
  2399.  
  2400.           /* Abort the UART DMA Rx channel */
  2401.           if (huart->hdmarx != NULL)
  2402.           {
  2403.             /* Set the UART DMA Abort callback :
  2404.                will lead to call HAL_UART_ErrorCallback() at end of DMA abort procedure */
  2405.             huart->hdmarx->XferAbortCallback = UART_DMAAbortOnError;
  2406.  
  2407.             /* Abort DMA RX */
  2408.             if (HAL_DMA_Abort_IT(huart->hdmarx) != HAL_OK)
  2409.             {
  2410.               /* Call Directly huart->hdmarx->XferAbortCallback function in case of error */
  2411.               huart->hdmarx->XferAbortCallback(huart->hdmarx);
  2412.             }
  2413.           }
  2414.           else
  2415.           {
  2416.             /* Call user error callback */
  2417. #if (USE_HAL_UART_REGISTER_CALLBACKS == 1)
  2418.             /*Call registered error callback*/
  2419.             huart->ErrorCallback(huart);
  2420. #else
  2421.             /*Call legacy weak error callback*/
  2422.             HAL_UART_ErrorCallback(huart);
  2423. #endif /* USE_HAL_UART_REGISTER_CALLBACKS */
  2424.  
  2425.           }
  2426.         }
  2427.         else
  2428.         {
  2429.           /* Call user error callback */
  2430. #if (USE_HAL_UART_REGISTER_CALLBACKS == 1)
  2431.           /*Call registered error callback*/
  2432.           huart->ErrorCallback(huart);
  2433. #else
  2434.           /*Call legacy weak error callback*/
  2435.           HAL_UART_ErrorCallback(huart);
  2436. #endif /* USE_HAL_UART_REGISTER_CALLBACKS */
  2437.         }
  2438.       }
  2439.       else
  2440.       {
  2441.         /* Non Blocking error : transfer could go on.
  2442.            Error is notified to user through user error callback */
  2443. #if (USE_HAL_UART_REGISTER_CALLBACKS == 1)
  2444.         /*Call registered error callback*/
  2445.         huart->ErrorCallback(huart);
  2446. #else
  2447.         /*Call legacy weak error callback*/
  2448.         HAL_UART_ErrorCallback(huart);
  2449. #endif /* USE_HAL_UART_REGISTER_CALLBACKS */
  2450.         huart->ErrorCode = HAL_UART_ERROR_NONE;
  2451.       }
  2452.     }
  2453.     return;
  2454.  
  2455.   } /* End if some error occurs */
  2456.  
  2457.   /* Check current reception Mode :
  2458.      If Reception till IDLE event has been selected : */
  2459.   if ((huart->ReceptionType == HAL_UART_RECEPTION_TOIDLE)
  2460.       && ((isrflags & USART_ISR_IDLE) != 0U)
  2461.       && ((cr1its & USART_ISR_IDLE) != 0U))
  2462.   {
  2463.     __HAL_UART_CLEAR_FLAG(huart, UART_CLEAR_IDLEF);
  2464.  
  2465.     /* Check if DMA mode is enabled in UART */
  2466.     if (HAL_IS_BIT_SET(huart->Instance->CR3, USART_CR3_DMAR))
  2467.     {
  2468.       /* DMA mode enabled */
  2469.       /* Check received length : If all expected data are received, do nothing,
  2470.          (DMA cplt callback will be called).
  2471.          Otherwise, if at least one data has already been received, IDLE event is to be notified to user */
  2472.       uint16_t nb_remaining_rx_data = (uint16_t) __HAL_DMA_GET_COUNTER(huart->hdmarx);
  2473.       if ((nb_remaining_rx_data > 0U)
  2474.           && (nb_remaining_rx_data < huart->RxXferSize))
  2475.       {
  2476.         /* Reception is not complete */
  2477.         huart->RxXferCount = nb_remaining_rx_data;
  2478.  
  2479.         /* In Normal mode, end DMA xfer and HAL UART Rx process*/
  2480.         if (huart->hdmarx->Init.Mode != DMA_CIRCULAR)
  2481.         {
  2482.           /* Disable PE and ERR (Frame error, noise error, overrun error) interrupts */
  2483.           ATOMIC_CLEAR_BIT(huart->Instance->CR1, USART_CR1_PEIE);
  2484.           ATOMIC_CLEAR_BIT(huart->Instance->CR3, USART_CR3_EIE);
  2485.  
  2486.           /* Disable the DMA transfer for the receiver request by resetting the DMAR bit
  2487.              in the UART CR3 register */
  2488.           ATOMIC_CLEAR_BIT(huart->Instance->CR3, USART_CR3_DMAR);
  2489.  
  2490.           /* At end of Rx process, restore huart->RxState to Ready */
  2491.           huart->RxState = HAL_UART_STATE_READY;
  2492.           huart->ReceptionType = HAL_UART_RECEPTION_STANDARD;
  2493.  
  2494.           ATOMIC_CLEAR_BIT(huart->Instance->CR1, USART_CR1_IDLEIE);
  2495.  
  2496.           /* Last bytes received, so no need as the abort is immediate */
  2497.           (void)HAL_DMA_Abort(huart->hdmarx);
  2498.         }
  2499. #if (USE_HAL_UART_REGISTER_CALLBACKS == 1)
  2500.         /*Call registered Rx Event callback*/
  2501.         huart->RxEventCallback(huart, (huart->RxXferSize - huart->RxXferCount));
  2502. #else
  2503.         /*Call legacy weak Rx Event callback*/
  2504.         HAL_UARTEx_RxEventCallback(huart, (huart->RxXferSize - huart->RxXferCount));
  2505. #endif /* (USE_HAL_UART_REGISTER_CALLBACKS) */
  2506.       }
  2507.       return;
  2508.     }
  2509.     else
  2510.     {
  2511.       /* DMA mode not enabled */
  2512.       /* Check received length : If all expected data are received, do nothing.
  2513.          Otherwise, if at least one data has already been received, IDLE event is to be notified to user */
  2514.       uint16_t nb_rx_data = huart->RxXferSize - huart->RxXferCount;
  2515.       if ((huart->RxXferCount > 0U)
  2516.           && (nb_rx_data > 0U))
  2517.       {
  2518.         /* Disable the UART Parity Error Interrupt and RXNE interrupts */
  2519.         ATOMIC_CLEAR_BIT(huart->Instance->CR1, (USART_CR1_RXNEIE | USART_CR1_PEIE));
  2520.  
  2521.         /* Disable the UART Error Interrupt: (Frame error, noise error, overrun error) */
  2522.         ATOMIC_CLEAR_BIT(huart->Instance->CR3, USART_CR3_EIE);
  2523.  
  2524.         /* Rx process is completed, restore huart->RxState to Ready */
  2525.         huart->RxState = HAL_UART_STATE_READY;
  2526.         huart->ReceptionType = HAL_UART_RECEPTION_STANDARD;
  2527.  
  2528.         /* Clear RxISR function pointer */
  2529.         huart->RxISR = NULL;
  2530.  
  2531.         ATOMIC_CLEAR_BIT(huart->Instance->CR1, USART_CR1_IDLEIE);
  2532. #if (USE_HAL_UART_REGISTER_CALLBACKS == 1)
  2533.         /*Call registered Rx complete callback*/
  2534.         huart->RxEventCallback(huart, nb_rx_data);
  2535. #else
  2536.         /*Call legacy weak Rx Event callback*/
  2537.         HAL_UARTEx_RxEventCallback(huart, nb_rx_data);
  2538. #endif /* (USE_HAL_UART_REGISTER_CALLBACKS) */
  2539.       }
  2540.       return;
  2541.     }
  2542.   }
  2543. #if defined(USART_CR1_UESM)
  2544. #if defined(USART_CR3_WUFIE)
  2545.  
  2546.   /* UART wakeup from Stop mode interrupt occurred ---------------------------*/
  2547.   if (((isrflags & USART_ISR_WUF) != 0U) && ((cr3its & USART_CR3_WUFIE) != 0U))
  2548.   {
  2549.     __HAL_UART_CLEAR_FLAG(huart, UART_CLEAR_WUF);
  2550.  
  2551.     /* UART Rx state is not reset as a reception process might be ongoing.
  2552.        If UART handle state fields need to be reset to READY, this could be done in Wakeup callback */
  2553.  
  2554. #if (USE_HAL_UART_REGISTER_CALLBACKS == 1)
  2555.     /* Call registered Wakeup Callback */
  2556.     huart->WakeupCallback(huart);
  2557. #else
  2558.     /* Call legacy weak Wakeup Callback */
  2559.     HAL_UARTEx_WakeupCallback(huart);
  2560. #endif /* USE_HAL_UART_REGISTER_CALLBACKS */
  2561.     return;
  2562.   }
  2563. #endif /* USART_CR3_WUFIE */
  2564. #endif /* USART_CR1_UESM */
  2565.  
  2566.   /* UART in mode Transmitter ------------------------------------------------*/
  2567.   if (((isrflags & USART_ISR_TXE) != 0U)
  2568.       && ((cr1its & USART_CR1_TXEIE) != 0U))
  2569.   {
  2570.     if (huart->TxISR != NULL)
  2571.     {
  2572.       huart->TxISR(huart);
  2573.     }
  2574.     return;
  2575.   }
  2576.  
  2577.   /* UART in mode Transmitter (transmission end) -----------------------------*/
  2578.   if (((isrflags & USART_ISR_TC) != 0U) && ((cr1its & USART_CR1_TCIE) != 0U))
  2579.   {
  2580.     UART_EndTransmit_IT(huart);
  2581.     return;
  2582.   }
  2583.  
  2584. }
  2585.  
  2586. /**
  2587.   * @brief Tx Transfer completed callback.
  2588.   * @param huart UART handle.
  2589.   * @retval None
  2590.   */
  2591. __weak void HAL_UART_TxCpltCallback(UART_HandleTypeDef *huart)
  2592. {
  2593.   /* Prevent unused argument(s) compilation warning */
  2594.   UNUSED(huart);
  2595.  
  2596.   /* NOTE : This function should not be modified, when the callback is needed,
  2597.             the HAL_UART_TxCpltCallback can be implemented in the user file.
  2598.    */
  2599. }
  2600.  
  2601. /**
  2602.   * @brief  Tx Half Transfer completed callback.
  2603.   * @param  huart UART handle.
  2604.   * @retval None
  2605.   */
  2606. __weak void HAL_UART_TxHalfCpltCallback(UART_HandleTypeDef *huart)
  2607. {
  2608.   /* Prevent unused argument(s) compilation warning */
  2609.   UNUSED(huart);
  2610.  
  2611.   /* NOTE: This function should not be modified, when the callback is needed,
  2612.            the HAL_UART_TxHalfCpltCallback can be implemented in the user file.
  2613.    */
  2614. }
  2615.  
  2616. /**
  2617.   * @brief  Rx Transfer completed callback.
  2618.   * @param  huart UART handle.
  2619.   * @retval None
  2620.   */
  2621. __weak void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart)
  2622. {
  2623.   /* Prevent unused argument(s) compilation warning */
  2624.   UNUSED(huart);
  2625.  
  2626.   /* NOTE : This function should not be modified, when the callback is needed,
  2627.             the HAL_UART_RxCpltCallback can be implemented in the user file.
  2628.    */
  2629. }
  2630.  
  2631. /**
  2632.   * @brief  Rx Half Transfer completed callback.
  2633.   * @param  huart UART handle.
  2634.   * @retval None
  2635.   */
  2636. __weak void HAL_UART_RxHalfCpltCallback(UART_HandleTypeDef *huart)
  2637. {
  2638.   /* Prevent unused argument(s) compilation warning */
  2639.   UNUSED(huart);
  2640.  
  2641.   /* NOTE: This function should not be modified, when the callback is needed,
  2642.            the HAL_UART_RxHalfCpltCallback can be implemented in the user file.
  2643.    */
  2644. }
  2645.  
  2646. /**
  2647.   * @brief  UART error callback.
  2648.   * @param  huart UART handle.
  2649.   * @retval None
  2650.   */
  2651. __weak void HAL_UART_ErrorCallback(UART_HandleTypeDef *huart)
  2652. {
  2653.   /* Prevent unused argument(s) compilation warning */
  2654.   UNUSED(huart);
  2655.  
  2656.   /* NOTE : This function should not be modified, when the callback is needed,
  2657.             the HAL_UART_ErrorCallback can be implemented in the user file.
  2658.    */
  2659. }
  2660.  
  2661. /**
  2662.   * @brief  UART Abort Complete callback.
  2663.   * @param  huart UART handle.
  2664.   * @retval None
  2665.   */
  2666. __weak void HAL_UART_AbortCpltCallback(UART_HandleTypeDef *huart)
  2667. {
  2668.   /* Prevent unused argument(s) compilation warning */
  2669.   UNUSED(huart);
  2670.  
  2671.   /* NOTE : This function should not be modified, when the callback is needed,
  2672.             the HAL_UART_AbortCpltCallback can be implemented in the user file.
  2673.    */
  2674. }
  2675.  
  2676. /**
  2677.   * @brief  UART Abort Complete callback.
  2678.   * @param  huart UART handle.
  2679.   * @retval None
  2680.   */
  2681. __weak void HAL_UART_AbortTransmitCpltCallback(UART_HandleTypeDef *huart)
  2682. {
  2683.   /* Prevent unused argument(s) compilation warning */
  2684.   UNUSED(huart);
  2685.  
  2686.   /* NOTE : This function should not be modified, when the callback is needed,
  2687.             the HAL_UART_AbortTransmitCpltCallback can be implemented in the user file.
  2688.    */
  2689. }
  2690.  
  2691. /**
  2692.   * @brief  UART Abort Receive Complete callback.
  2693.   * @param  huart UART handle.
  2694.   * @retval None
  2695.   */
  2696. __weak void HAL_UART_AbortReceiveCpltCallback(UART_HandleTypeDef *huart)
  2697. {
  2698.   /* Prevent unused argument(s) compilation warning */
  2699.   UNUSED(huart);
  2700.  
  2701.   /* NOTE : This function should not be modified, when the callback is needed,
  2702.             the HAL_UART_AbortReceiveCpltCallback can be implemented in the user file.
  2703.    */
  2704. }
  2705.  
  2706. /**
  2707.   * @brief  Reception Event Callback (Rx event notification called after use of advanced reception service).
  2708.   * @param  huart UART handle
  2709.   * @param  Size  Number of data available in application reception buffer (indicates a position in
  2710.   *               reception buffer until which, data are available)
  2711.   * @retval None
  2712.   */
  2713. __weak void HAL_UARTEx_RxEventCallback(UART_HandleTypeDef *huart, uint16_t Size)
  2714. {
  2715.   /* Prevent unused argument(s) compilation warning */
  2716.   UNUSED(huart);
  2717.   UNUSED(Size);
  2718.  
  2719.   /* NOTE : This function should not be modified, when the callback is needed,
  2720.             the HAL_UARTEx_RxEventCallback can be implemented in the user file.
  2721.    */
  2722. }
  2723.  
  2724. /**
  2725.   * @}
  2726.   */
  2727.  
  2728. /** @defgroup UART_Exported_Functions_Group3 Peripheral Control functions
  2729.   *  @brief   UART control functions
  2730.   *
  2731. @verbatim
  2732.  ===============================================================================
  2733.                       ##### Peripheral Control functions #####
  2734.  ===============================================================================
  2735.     [..]
  2736.     This subsection provides a set of functions allowing to control the UART.
  2737.      (+) HAL_UART_ReceiverTimeout_Config() API allows to configure the receiver timeout value on the fly
  2738.      (+) HAL_UART_EnableReceiverTimeout() API enables the receiver timeout feature
  2739.      (+) HAL_UART_DisableReceiverTimeout() API disables the receiver timeout feature
  2740.      (+) HAL_MultiProcessor_EnableMuteMode() API enables mute mode
  2741.      (+) HAL_MultiProcessor_DisableMuteMode() API disables mute mode
  2742.      (+) HAL_MultiProcessor_EnterMuteMode() API enters mute mode
  2743.      (+) UART_SetConfig() API configures the UART peripheral
  2744.      (+) UART_AdvFeatureConfig() API optionally configures the UART advanced features
  2745.      (+) UART_CheckIdleState() API ensures that TEACK and/or REACK are set after initialization
  2746.      (+) HAL_HalfDuplex_EnableTransmitter() API disables receiver and enables transmitter
  2747.      (+) HAL_HalfDuplex_EnableReceiver() API disables transmitter and enables receiver
  2748.      (+) HAL_LIN_SendBreak() API transmits the break characters
  2749. @endverbatim
  2750.   * @{
  2751.   */
  2752.  
  2753. /**
  2754.   * @brief  Update on the fly the receiver timeout value in RTOR register.
  2755.   * @param  huart Pointer to a UART_HandleTypeDef structure that contains
  2756.   *                    the configuration information for the specified UART module.
  2757.   * @param  TimeoutValue receiver timeout value in number of baud blocks. The timeout
  2758.   *                     value must be less or equal to 0x0FFFFFFFF.
  2759.   * @retval None
  2760.   */
  2761. void HAL_UART_ReceiverTimeout_Config(UART_HandleTypeDef *huart, uint32_t TimeoutValue)
  2762. {
  2763.   assert_param(IS_UART_RECEIVER_TIMEOUT_VALUE(TimeoutValue));
  2764.   MODIFY_REG(huart->Instance->RTOR, USART_RTOR_RTO, TimeoutValue);
  2765. }
  2766.  
  2767. /**
  2768.   * @brief  Enable the UART receiver timeout feature.
  2769.   * @param  huart Pointer to a UART_HandleTypeDef structure that contains
  2770.   *                    the configuration information for the specified UART module.
  2771.   * @retval HAL status
  2772.   */
  2773. HAL_StatusTypeDef HAL_UART_EnableReceiverTimeout(UART_HandleTypeDef *huart)
  2774. {
  2775.   if (huart->gState == HAL_UART_STATE_READY)
  2776.   {
  2777.     /* Process Locked */
  2778.     __HAL_LOCK(huart);
  2779.  
  2780.     huart->gState = HAL_UART_STATE_BUSY;
  2781.  
  2782.     /* Set the USART RTOEN bit */
  2783.     SET_BIT(huart->Instance->CR2, USART_CR2_RTOEN);
  2784.  
  2785.     huart->gState = HAL_UART_STATE_READY;
  2786.  
  2787.     /* Process Unlocked */
  2788.     __HAL_UNLOCK(huart);
  2789.  
  2790.     return HAL_OK;
  2791.   }
  2792.   else
  2793.   {
  2794.     return HAL_BUSY;
  2795.   }
  2796. }
  2797.  
  2798. /**
  2799.   * @brief  Disable the UART receiver timeout feature.
  2800.   * @param  huart Pointer to a UART_HandleTypeDef structure that contains
  2801.   *                    the configuration information for the specified UART module.
  2802.   * @retval HAL status
  2803.   */
  2804. HAL_StatusTypeDef HAL_UART_DisableReceiverTimeout(UART_HandleTypeDef *huart)
  2805. {
  2806.   if (huart->gState == HAL_UART_STATE_READY)
  2807.   {
  2808.     /* Process Locked */
  2809.     __HAL_LOCK(huart);
  2810.  
  2811.     huart->gState = HAL_UART_STATE_BUSY;
  2812.  
  2813.     /* Clear the USART RTOEN bit */
  2814.     CLEAR_BIT(huart->Instance->CR2, USART_CR2_RTOEN);
  2815.  
  2816.     huart->gState = HAL_UART_STATE_READY;
  2817.  
  2818.     /* Process Unlocked */
  2819.     __HAL_UNLOCK(huart);
  2820.  
  2821.     return HAL_OK;
  2822.   }
  2823.   else
  2824.   {
  2825.     return HAL_BUSY;
  2826.   }
  2827. }
  2828.  
  2829. /**
  2830.   * @brief  Enable UART in mute mode (does not mean UART enters mute mode;
  2831.   *         to enter mute mode, HAL_MultiProcessor_EnterMuteMode() API must be called).
  2832.   * @param  huart UART handle.
  2833.   * @retval HAL status
  2834.   */
  2835. HAL_StatusTypeDef HAL_MultiProcessor_EnableMuteMode(UART_HandleTypeDef *huart)
  2836. {
  2837.   __HAL_LOCK(huart);
  2838.  
  2839.   huart->gState = HAL_UART_STATE_BUSY;
  2840.  
  2841.   /* Enable USART mute mode by setting the MME bit in the CR1 register */
  2842.   ATOMIC_SET_BIT(huart->Instance->CR1, USART_CR1_MME);
  2843.  
  2844.   huart->gState = HAL_UART_STATE_READY;
  2845.  
  2846.   return (UART_CheckIdleState(huart));
  2847. }
  2848.  
  2849. /**
  2850.   * @brief  Disable UART mute mode (does not mean the UART actually exits mute mode
  2851.   *         as it may not have been in mute mode at this very moment).
  2852.   * @param  huart UART handle.
  2853.   * @retval HAL status
  2854.   */
  2855. HAL_StatusTypeDef HAL_MultiProcessor_DisableMuteMode(UART_HandleTypeDef *huart)
  2856. {
  2857.   __HAL_LOCK(huart);
  2858.  
  2859.   huart->gState = HAL_UART_STATE_BUSY;
  2860.  
  2861.   /* Disable USART mute mode by clearing the MME bit in the CR1 register */
  2862.   ATOMIC_CLEAR_BIT(huart->Instance->CR1, USART_CR1_MME);
  2863.  
  2864.   huart->gState = HAL_UART_STATE_READY;
  2865.  
  2866.   return (UART_CheckIdleState(huart));
  2867. }
  2868.  
  2869. /**
  2870.   * @brief Enter UART mute mode (means UART actually enters mute mode).
  2871.   * @note  To exit from mute mode, HAL_MultiProcessor_DisableMuteMode() API must be called.
  2872.   * @param huart UART handle.
  2873.   * @retval None
  2874.   */
  2875. void HAL_MultiProcessor_EnterMuteMode(UART_HandleTypeDef *huart)
  2876. {
  2877.   __HAL_UART_SEND_REQ(huart, UART_MUTE_MODE_REQUEST);
  2878. }
  2879.  
  2880. /**
  2881.   * @brief  Enable the UART transmitter and disable the UART receiver.
  2882.   * @param  huart UART handle.
  2883.   * @retval HAL status
  2884.   */
  2885. HAL_StatusTypeDef HAL_HalfDuplex_EnableTransmitter(UART_HandleTypeDef *huart)
  2886. {
  2887.   __HAL_LOCK(huart);
  2888.   huart->gState = HAL_UART_STATE_BUSY;
  2889.  
  2890.   /* Clear TE and RE bits */
  2891.   ATOMIC_CLEAR_BIT(huart->Instance->CR1, (USART_CR1_TE | USART_CR1_RE));
  2892.  
  2893.   /* Enable the USART's transmit interface by setting the TE bit in the USART CR1 register */
  2894.   ATOMIC_SET_BIT(huart->Instance->CR1, USART_CR1_TE);
  2895.  
  2896.   huart->gState = HAL_UART_STATE_READY;
  2897.  
  2898.   __HAL_UNLOCK(huart);
  2899.  
  2900.   return HAL_OK;
  2901. }
  2902.  
  2903. /**
  2904.   * @brief  Enable the UART receiver and disable the UART transmitter.
  2905.   * @param  huart UART handle.
  2906.   * @retval HAL status.
  2907.   */
  2908. HAL_StatusTypeDef HAL_HalfDuplex_EnableReceiver(UART_HandleTypeDef *huart)
  2909. {
  2910.   __HAL_LOCK(huart);
  2911.   huart->gState = HAL_UART_STATE_BUSY;
  2912.  
  2913.   /* Clear TE and RE bits */
  2914.   ATOMIC_CLEAR_BIT(huart->Instance->CR1, (USART_CR1_TE | USART_CR1_RE));
  2915.  
  2916.   /* Enable the USART's receive interface by setting the RE bit in the USART CR1 register */
  2917.   ATOMIC_SET_BIT(huart->Instance->CR1, USART_CR1_RE);
  2918.  
  2919.   huart->gState = HAL_UART_STATE_READY;
  2920.  
  2921.   __HAL_UNLOCK(huart);
  2922.  
  2923.   return HAL_OK;
  2924. }
  2925.  
  2926.  
  2927. #if   defined(USART_CR2_LINEN)
  2928. /**
  2929.   * @brief  Transmit break characters.
  2930.   * @param  huart UART handle.
  2931.   * @retval HAL status
  2932.   */
  2933. HAL_StatusTypeDef HAL_LIN_SendBreak(UART_HandleTypeDef *huart)
  2934. {
  2935.   /* Check the parameters */
  2936.   assert_param(IS_UART_LIN_INSTANCE(huart->Instance));
  2937.  
  2938.   __HAL_LOCK(huart);
  2939.  
  2940.   huart->gState = HAL_UART_STATE_BUSY;
  2941.  
  2942.   /* Send break characters */
  2943.   __HAL_UART_SEND_REQ(huart, UART_SENDBREAK_REQUEST);
  2944.  
  2945.   huart->gState = HAL_UART_STATE_READY;
  2946.  
  2947.   __HAL_UNLOCK(huart);
  2948.  
  2949.   return HAL_OK;
  2950. }
  2951. #endif /* USART_CR2_LINEN */
  2952.  
  2953. /**
  2954.   * @}
  2955.   */
  2956.  
  2957. /** @defgroup UART_Exported_Functions_Group4 Peripheral State and Error functions
  2958.   *  @brief   UART Peripheral State functions
  2959.   *
  2960. @verbatim
  2961.   ==============================================================================
  2962.             ##### Peripheral State and Error functions #####
  2963.   ==============================================================================
  2964.     [..]
  2965.     This subsection provides functions allowing to :
  2966.       (+) Return the UART handle state.
  2967.       (+) Return the UART handle error code
  2968.  
  2969. @endverbatim
  2970.   * @{
  2971.   */
  2972.  
  2973. /**
  2974.   * @brief Return the UART handle state.
  2975.   * @param  huart Pointer to a UART_HandleTypeDef structure that contains
  2976.   *               the configuration information for the specified UART.
  2977.   * @retval HAL state
  2978.   */
  2979. HAL_UART_StateTypeDef HAL_UART_GetState(UART_HandleTypeDef *huart)
  2980. {
  2981.   uint32_t temp1;
  2982.   uint32_t temp2;
  2983.   temp1 = huart->gState;
  2984.   temp2 = huart->RxState;
  2985.  
  2986.   return (HAL_UART_StateTypeDef)(temp1 | temp2);
  2987. }
  2988.  
  2989. /**
  2990.   * @brief  Return the UART handle error code.
  2991.   * @param  huart Pointer to a UART_HandleTypeDef structure that contains
  2992.   *               the configuration information for the specified UART.
  2993.   * @retval UART Error Code
  2994.   */
  2995. uint32_t HAL_UART_GetError(UART_HandleTypeDef *huart)
  2996. {
  2997.   return huart->ErrorCode;
  2998. }
  2999. /**
  3000.   * @}
  3001.   */
  3002.  
  3003. /**
  3004.   * @}
  3005.   */
  3006.  
  3007. /** @defgroup UART_Private_Functions UART Private Functions
  3008.   * @{
  3009.   */
  3010.  
  3011. /**
  3012.   * @brief  Initialize the callbacks to their default values.
  3013.   * @param  huart UART handle.
  3014.   * @retval none
  3015.   */
  3016. #if (USE_HAL_UART_REGISTER_CALLBACKS == 1)
  3017. void UART_InitCallbacksToDefault(UART_HandleTypeDef *huart)
  3018. {
  3019.   /* Init the UART Callback settings */
  3020.   huart->TxHalfCpltCallback        = HAL_UART_TxHalfCpltCallback;        /* Legacy weak TxHalfCpltCallback        */
  3021.   huart->TxCpltCallback            = HAL_UART_TxCpltCallback;            /* Legacy weak TxCpltCallback            */
  3022.   huart->RxHalfCpltCallback        = HAL_UART_RxHalfCpltCallback;        /* Legacy weak RxHalfCpltCallback        */
  3023.   huart->RxCpltCallback            = HAL_UART_RxCpltCallback;            /* Legacy weak RxCpltCallback            */
  3024.   huart->ErrorCallback             = HAL_UART_ErrorCallback;             /* Legacy weak ErrorCallback             */
  3025.   huart->AbortCpltCallback         = HAL_UART_AbortCpltCallback;         /* Legacy weak AbortCpltCallback         */
  3026.   huart->AbortTransmitCpltCallback = HAL_UART_AbortTransmitCpltCallback; /* Legacy weak AbortTransmitCpltCallback */
  3027.   huart->AbortReceiveCpltCallback  = HAL_UART_AbortReceiveCpltCallback;  /* Legacy weak AbortReceiveCpltCallback  */
  3028. #if defined(USART_CR1_UESM)
  3029. #if defined(USART_CR3_WUFIE)
  3030.   huart->WakeupCallback            = HAL_UARTEx_WakeupCallback;          /* Legacy weak WakeupCallback            */
  3031. #endif /* USART_CR3_WUFIE */
  3032. #endif /* USART_CR1_UESM */
  3033.   huart->RxEventCallback           = HAL_UARTEx_RxEventCallback;         /* Legacy weak RxEventCallback           */
  3034.  
  3035. }
  3036. #endif /* USE_HAL_UART_REGISTER_CALLBACKS */
  3037.  
  3038. /**
  3039.   * @brief Configure the UART peripheral.
  3040.   * @param huart UART handle.
  3041.   * @retval HAL status
  3042.   */
  3043. HAL_StatusTypeDef UART_SetConfig(UART_HandleTypeDef *huart)
  3044. {
  3045.   uint32_t tmpreg;
  3046.   uint16_t brrtemp;
  3047.   UART_ClockSourceTypeDef clocksource;
  3048.   uint32_t usartdiv;
  3049.   HAL_StatusTypeDef ret               = HAL_OK;
  3050.   uint32_t pclk;
  3051.  
  3052.   /* Check the parameters */
  3053.   assert_param(IS_UART_BAUDRATE(huart->Init.BaudRate));
  3054.   assert_param(IS_UART_WORD_LENGTH(huart->Init.WordLength));
  3055.   assert_param(IS_UART_STOPBITS(huart->Init.StopBits));
  3056.   assert_param(IS_UART_ONE_BIT_SAMPLE(huart->Init.OneBitSampling));
  3057.  
  3058.   assert_param(IS_UART_PARITY(huart->Init.Parity));
  3059.   assert_param(IS_UART_MODE(huart->Init.Mode));
  3060.   assert_param(IS_UART_HARDWARE_FLOW_CONTROL(huart->Init.HwFlowCtl));
  3061.   assert_param(IS_UART_OVERSAMPLING(huart->Init.OverSampling));
  3062.  
  3063.   /*-------------------------- USART CR1 Configuration -----------------------*/
  3064.   /* Clear M, PCE, PS, TE, RE and OVER8 bits and configure
  3065.   *  the UART Word Length, Parity, Mode and oversampling:
  3066.   *  set the M bits according to huart->Init.WordLength value
  3067.   *  set PCE and PS bits according to huart->Init.Parity value
  3068.   *  set TE and RE bits according to huart->Init.Mode value
  3069.   *  set OVER8 bit according to huart->Init.OverSampling value */
  3070.   tmpreg = (uint32_t)huart->Init.WordLength | huart->Init.Parity | huart->Init.Mode | huart->Init.OverSampling ;
  3071.   MODIFY_REG(huart->Instance->CR1, USART_CR1_FIELDS, tmpreg);
  3072.  
  3073.   /*-------------------------- USART CR2 Configuration -----------------------*/
  3074.   /* Configure the UART Stop Bits: Set STOP[13:12] bits according
  3075.   * to huart->Init.StopBits value */
  3076.   MODIFY_REG(huart->Instance->CR2, USART_CR2_STOP, huart->Init.StopBits);
  3077.  
  3078.   /*-------------------------- USART CR3 Configuration -----------------------*/
  3079.   /* Configure
  3080.   * - UART HardWare Flow Control: set CTSE and RTSE bits according
  3081.   *   to huart->Init.HwFlowCtl value
  3082.   * - one-bit sampling method versus three samples' majority rule according
  3083.   *   to huart->Init.OneBitSampling (not applicable to LPUART) */
  3084.   tmpreg = (uint32_t)huart->Init.HwFlowCtl;
  3085.  
  3086.   tmpreg |= huart->Init.OneBitSampling;
  3087.   MODIFY_REG(huart->Instance->CR3, USART_CR3_FIELDS, tmpreg);
  3088.  
  3089.  
  3090.   /*-------------------------- USART BRR Configuration -----------------------*/
  3091.   UART_GETCLOCKSOURCE(huart, clocksource);
  3092.  
  3093.   if (huart->Init.OverSampling == UART_OVERSAMPLING_8)
  3094.   {
  3095.     switch (clocksource)
  3096.     {
  3097.       case UART_CLOCKSOURCE_PCLK1:
  3098.         pclk = HAL_RCC_GetPCLK1Freq();
  3099.         break;
  3100.       case UART_CLOCKSOURCE_HSI:
  3101.         pclk = (uint32_t) HSI_VALUE;
  3102.         break;
  3103.       case UART_CLOCKSOURCE_SYSCLK:
  3104.         pclk = HAL_RCC_GetSysClockFreq();
  3105.         break;
  3106.       case UART_CLOCKSOURCE_LSE:
  3107.         pclk = (uint32_t) LSE_VALUE;
  3108.         break;
  3109.       default:
  3110.         pclk = 0U;
  3111.         ret = HAL_ERROR;
  3112.         break;
  3113.     }
  3114.  
  3115.     /* USARTDIV must be greater than or equal to 0d16 */
  3116.     if (pclk != 0U)
  3117.     {
  3118.       usartdiv = (uint16_t)(UART_DIV_SAMPLING8(pclk, huart->Init.BaudRate));
  3119.       if ((usartdiv >= UART_BRR_MIN) && (usartdiv <= UART_BRR_MAX))
  3120.       {
  3121.         brrtemp = (uint16_t)(usartdiv & 0xFFF0U);
  3122.         brrtemp |= (uint16_t)((usartdiv & (uint16_t)0x000FU) >> 1U);
  3123.         huart->Instance->BRR = brrtemp;
  3124.       }
  3125.       else
  3126.       {
  3127.         ret = HAL_ERROR;
  3128.       }
  3129.     }
  3130.   }
  3131.   else
  3132.   {
  3133.     switch (clocksource)
  3134.     {
  3135.       case UART_CLOCKSOURCE_PCLK1:
  3136.         pclk = HAL_RCC_GetPCLK1Freq();
  3137.         break;
  3138.       case UART_CLOCKSOURCE_HSI:
  3139.         pclk = (uint32_t) HSI_VALUE;
  3140.         break;
  3141.       case UART_CLOCKSOURCE_SYSCLK:
  3142.         pclk = HAL_RCC_GetSysClockFreq();
  3143.         break;
  3144.       case UART_CLOCKSOURCE_LSE:
  3145.         pclk = (uint32_t) LSE_VALUE;
  3146.         break;
  3147.       default:
  3148.         pclk = 0U;
  3149.         ret = HAL_ERROR;
  3150.         break;
  3151.     }
  3152.  
  3153.     if (pclk != 0U)
  3154.     {
  3155.       /* USARTDIV must be greater than or equal to 0d16 */
  3156.       usartdiv = (uint16_t)(UART_DIV_SAMPLING16(pclk, huart->Init.BaudRate));
  3157.       if ((usartdiv >= UART_BRR_MIN) && (usartdiv <= UART_BRR_MAX))
  3158.       {
  3159.         huart->Instance->BRR = usartdiv;
  3160.       }
  3161.       else
  3162.       {
  3163.         ret = HAL_ERROR;
  3164.       }
  3165.     }
  3166.   }
  3167.  
  3168.  
  3169.   /* Clear ISR function pointers */
  3170.   huart->RxISR = NULL;
  3171.   huart->TxISR = NULL;
  3172.  
  3173.   return ret;
  3174. }
  3175.  
  3176. /**
  3177.   * @brief Configure the UART peripheral advanced features.
  3178.   * @param huart UART handle.
  3179.   * @retval None
  3180.   */
  3181. void UART_AdvFeatureConfig(UART_HandleTypeDef *huart)
  3182. {
  3183.   /* Check whether the set of advanced features to configure is properly set */
  3184.   assert_param(IS_UART_ADVFEATURE_INIT(huart->AdvancedInit.AdvFeatureInit));
  3185.  
  3186.   /* if required, configure TX pin active level inversion */
  3187.   if (HAL_IS_BIT_SET(huart->AdvancedInit.AdvFeatureInit, UART_ADVFEATURE_TXINVERT_INIT))
  3188.   {
  3189.     assert_param(IS_UART_ADVFEATURE_TXINV(huart->AdvancedInit.TxPinLevelInvert));
  3190.     MODIFY_REG(huart->Instance->CR2, USART_CR2_TXINV, huart->AdvancedInit.TxPinLevelInvert);
  3191.   }
  3192.  
  3193.   /* if required, configure RX pin active level inversion */
  3194.   if (HAL_IS_BIT_SET(huart->AdvancedInit.AdvFeatureInit, UART_ADVFEATURE_RXINVERT_INIT))
  3195.   {
  3196.     assert_param(IS_UART_ADVFEATURE_RXINV(huart->AdvancedInit.RxPinLevelInvert));
  3197.     MODIFY_REG(huart->Instance->CR2, USART_CR2_RXINV, huart->AdvancedInit.RxPinLevelInvert);
  3198.   }
  3199.  
  3200.   /* if required, configure data inversion */
  3201.   if (HAL_IS_BIT_SET(huart->AdvancedInit.AdvFeatureInit, UART_ADVFEATURE_DATAINVERT_INIT))
  3202.   {
  3203.     assert_param(IS_UART_ADVFEATURE_DATAINV(huart->AdvancedInit.DataInvert));
  3204.     MODIFY_REG(huart->Instance->CR2, USART_CR2_DATAINV, huart->AdvancedInit.DataInvert);
  3205.   }
  3206.  
  3207.   /* if required, configure RX/TX pins swap */
  3208.   if (HAL_IS_BIT_SET(huart->AdvancedInit.AdvFeatureInit, UART_ADVFEATURE_SWAP_INIT))
  3209.   {
  3210.     assert_param(IS_UART_ADVFEATURE_SWAP(huart->AdvancedInit.Swap));
  3211.     MODIFY_REG(huart->Instance->CR2, USART_CR2_SWAP, huart->AdvancedInit.Swap);
  3212.   }
  3213.  
  3214.   /* if required, configure RX overrun detection disabling */
  3215.   if (HAL_IS_BIT_SET(huart->AdvancedInit.AdvFeatureInit, UART_ADVFEATURE_RXOVERRUNDISABLE_INIT))
  3216.   {
  3217.     assert_param(IS_UART_OVERRUN(huart->AdvancedInit.OverrunDisable));
  3218.     MODIFY_REG(huart->Instance->CR3, USART_CR3_OVRDIS, huart->AdvancedInit.OverrunDisable);
  3219.   }
  3220.  
  3221.   /* if required, configure DMA disabling on reception error */
  3222.   if (HAL_IS_BIT_SET(huart->AdvancedInit.AdvFeatureInit, UART_ADVFEATURE_DMADISABLEONERROR_INIT))
  3223.   {
  3224.     assert_param(IS_UART_ADVFEATURE_DMAONRXERROR(huart->AdvancedInit.DMADisableonRxError));
  3225.     MODIFY_REG(huart->Instance->CR3, USART_CR3_DDRE, huart->AdvancedInit.DMADisableonRxError);
  3226.   }
  3227.  
  3228.   /* if required, configure auto Baud rate detection scheme */
  3229.   if (HAL_IS_BIT_SET(huart->AdvancedInit.AdvFeatureInit, UART_ADVFEATURE_AUTOBAUDRATE_INIT))
  3230.   {
  3231.     assert_param(IS_USART_AUTOBAUDRATE_DETECTION_INSTANCE(huart->Instance));
  3232.     assert_param(IS_UART_ADVFEATURE_AUTOBAUDRATE(huart->AdvancedInit.AutoBaudRateEnable));
  3233.     MODIFY_REG(huart->Instance->CR2, USART_CR2_ABREN, huart->AdvancedInit.AutoBaudRateEnable);
  3234.     /* set auto Baudrate detection parameters if detection is enabled */
  3235.     if (huart->AdvancedInit.AutoBaudRateEnable == UART_ADVFEATURE_AUTOBAUDRATE_ENABLE)
  3236.     {
  3237.       assert_param(IS_UART_ADVFEATURE_AUTOBAUDRATEMODE(huart->AdvancedInit.AutoBaudRateMode));
  3238.       MODIFY_REG(huart->Instance->CR2, USART_CR2_ABRMODE, huart->AdvancedInit.AutoBaudRateMode);
  3239.     }
  3240.   }
  3241.  
  3242.   /* if required, configure MSB first on communication line */
  3243.   if (HAL_IS_BIT_SET(huart->AdvancedInit.AdvFeatureInit, UART_ADVFEATURE_MSBFIRST_INIT))
  3244.   {
  3245.     assert_param(IS_UART_ADVFEATURE_MSBFIRST(huart->AdvancedInit.MSBFirst));
  3246.     MODIFY_REG(huart->Instance->CR2, USART_CR2_MSBFIRST, huart->AdvancedInit.MSBFirst);
  3247.   }
  3248. }
  3249.  
  3250. /**
  3251.   * @brief Check the UART Idle State.
  3252.   * @param huart UART handle.
  3253.   * @retval HAL status
  3254.   */
  3255. HAL_StatusTypeDef UART_CheckIdleState(UART_HandleTypeDef *huart)
  3256. {
  3257.   uint32_t tickstart;
  3258.  
  3259.   /* Initialize the UART ErrorCode */
  3260.   huart->ErrorCode = HAL_UART_ERROR_NONE;
  3261.  
  3262.   /* Init tickstart for timeout management */
  3263.   tickstart = HAL_GetTick();
  3264.  
  3265.   /* Check if the Transmitter is enabled */
  3266.   if ((huart->Instance->CR1 & USART_CR1_TE) == USART_CR1_TE)
  3267.   {
  3268.     /* Wait until TEACK flag is set */
  3269.     if (UART_WaitOnFlagUntilTimeout(huart, USART_ISR_TEACK, RESET, tickstart, HAL_UART_TIMEOUT_VALUE) != HAL_OK)
  3270.     {
  3271.       /* Timeout occurred */
  3272.       return HAL_TIMEOUT;
  3273.     }
  3274.   }
  3275.  
  3276.   /* Check if the Receiver is enabled */
  3277.   if ((huart->Instance->CR1 & USART_CR1_RE) == USART_CR1_RE)
  3278.   {
  3279.     /* Wait until REACK flag is set */
  3280.     if (UART_WaitOnFlagUntilTimeout(huart, USART_ISR_REACK, RESET, tickstart, HAL_UART_TIMEOUT_VALUE) != HAL_OK)
  3281.     {
  3282.       /* Timeout occurred */
  3283.       return HAL_TIMEOUT;
  3284.     }
  3285.   }
  3286.  
  3287.   /* Initialize the UART State */
  3288.   huart->gState = HAL_UART_STATE_READY;
  3289.   huart->RxState = HAL_UART_STATE_READY;
  3290.   huart->ReceptionType = HAL_UART_RECEPTION_STANDARD;
  3291.  
  3292.   __HAL_UNLOCK(huart);
  3293.  
  3294.   return HAL_OK;
  3295. }
  3296.  
  3297. /**
  3298.   * @brief  Handle UART Communication Timeout.
  3299.   * @param huart     UART handle.
  3300.   * @param Flag      Specifies the UART flag to check
  3301.   * @param Status    Flag status (SET or RESET)
  3302.   * @param Tickstart Tick start value
  3303.   * @param Timeout   Timeout duration
  3304.   * @retval HAL status
  3305.   */
  3306. HAL_StatusTypeDef UART_WaitOnFlagUntilTimeout(UART_HandleTypeDef *huart, uint32_t Flag, FlagStatus Status,
  3307.                                               uint32_t Tickstart, uint32_t Timeout)
  3308. {
  3309.   /* Wait until flag is set */
  3310.   while ((__HAL_UART_GET_FLAG(huart, Flag) ? SET : RESET) == Status)
  3311.   {
  3312.     /* Check for the Timeout */
  3313.     if (Timeout != HAL_MAX_DELAY)
  3314.     {
  3315.       if (((HAL_GetTick() - Tickstart) > Timeout) || (Timeout == 0U))
  3316.       {
  3317.         /* Disable TXE, RXNE, PE and ERR (Frame error, noise error, overrun error)
  3318.            interrupts for the interrupt process */
  3319.         ATOMIC_CLEAR_BIT(huart->Instance->CR1, (USART_CR1_RXNEIE | USART_CR1_PEIE | USART_CR1_TXEIE));
  3320.         ATOMIC_CLEAR_BIT(huart->Instance->CR3, USART_CR3_EIE);
  3321.  
  3322.         huart->gState = HAL_UART_STATE_READY;
  3323.         huart->RxState = HAL_UART_STATE_READY;
  3324.  
  3325.         __HAL_UNLOCK(huart);
  3326.  
  3327.         return HAL_TIMEOUT;
  3328.       }
  3329.  
  3330.       if (READ_BIT(huart->Instance->CR1, USART_CR1_RE) != 0U)
  3331.       {
  3332.         if (__HAL_UART_GET_FLAG(huart, UART_FLAG_RTOF) == SET)
  3333.         {
  3334.           /* Clear Receiver Timeout flag*/
  3335.           __HAL_UART_CLEAR_FLAG(huart, UART_CLEAR_RTOF);
  3336.  
  3337.           /* Disable TXE, RXNE, PE and ERR (Frame error, noise error, overrun error)
  3338.              interrupts for the interrupt process */
  3339.           ATOMIC_CLEAR_BIT(huart->Instance->CR1, (USART_CR1_RXNEIE | USART_CR1_PEIE | USART_CR1_TXEIE));
  3340.           ATOMIC_CLEAR_BIT(huart->Instance->CR3, USART_CR3_EIE);
  3341.  
  3342.           huart->gState = HAL_UART_STATE_READY;
  3343.           huart->RxState = HAL_UART_STATE_READY;
  3344.           huart->ErrorCode = HAL_UART_ERROR_RTO;
  3345.  
  3346.           /* Process Unlocked */
  3347.           __HAL_UNLOCK(huart);
  3348.  
  3349.           return HAL_TIMEOUT;
  3350.         }
  3351.       }
  3352.     }
  3353.   }
  3354.   return HAL_OK;
  3355. }
  3356.  
  3357. /**
  3358.   * @brief  Start Receive operation in interrupt mode.
  3359.   * @note   This function could be called by all HAL UART API providing reception in Interrupt mode.
  3360.   * @note   When calling this function, parameters validity is considered as already checked,
  3361.   *         i.e. Rx State, buffer address, ...
  3362.   *         UART Handle is assumed as Locked.
  3363.   * @param  huart UART handle.
  3364.   * @param  pData Pointer to data buffer (u8 or u16 data elements).
  3365.   * @param  Size  Amount of data elements (u8 or u16) to be received.
  3366.   * @retval HAL status
  3367.   */
  3368. HAL_StatusTypeDef UART_Start_Receive_IT(UART_HandleTypeDef *huart, uint8_t *pData, uint16_t Size)
  3369. {
  3370.   huart->pRxBuffPtr  = pData;
  3371.   huart->RxXferSize  = Size;
  3372.   huart->RxXferCount = Size;
  3373.   huart->RxISR       = NULL;
  3374.  
  3375.   /* Computation of UART mask to apply to RDR register */
  3376.   UART_MASK_COMPUTATION(huart);
  3377.  
  3378.   huart->ErrorCode = HAL_UART_ERROR_NONE;
  3379.   huart->RxState = HAL_UART_STATE_BUSY_RX;
  3380.  
  3381.   /* Enable the UART Error Interrupt: (Frame error, noise error, overrun error) */
  3382.   ATOMIC_SET_BIT(huart->Instance->CR3, USART_CR3_EIE);
  3383.  
  3384.   /* Set the Rx ISR function pointer according to the data word length */
  3385.   if ((huart->Init.WordLength == UART_WORDLENGTH_9B) && (huart->Init.Parity == UART_PARITY_NONE))
  3386.   {
  3387.     huart->RxISR = UART_RxISR_16BIT;
  3388.   }
  3389.   else
  3390.   {
  3391.     huart->RxISR = UART_RxISR_8BIT;
  3392.   }
  3393.  
  3394.   __HAL_UNLOCK(huart);
  3395.  
  3396.   /* Enable the UART Parity Error interrupt and Data Register Not Empty interrupt */
  3397.   ATOMIC_SET_BIT(huart->Instance->CR1, USART_CR1_PEIE | USART_CR1_RXNEIE);
  3398.   return HAL_OK;
  3399. }
  3400.  
  3401. /**
  3402.   * @brief  Start Receive operation in DMA mode.
  3403.   * @note   This function could be called by all HAL UART API providing reception in DMA mode.
  3404.   * @note   When calling this function, parameters validity is considered as already checked,
  3405.   *         i.e. Rx State, buffer address, ...
  3406.   *         UART Handle is assumed as Locked.
  3407.   * @param  huart UART handle.
  3408.   * @param  pData Pointer to data buffer (u8 or u16 data elements).
  3409.   * @param  Size  Amount of data elements (u8 or u16) to be received.
  3410.   * @retval HAL status
  3411.   */
  3412. HAL_StatusTypeDef UART_Start_Receive_DMA(UART_HandleTypeDef *huart, uint8_t *pData, uint16_t Size)
  3413. {
  3414.   huart->pRxBuffPtr = pData;
  3415.   huart->RxXferSize = Size;
  3416.  
  3417.   huart->ErrorCode = HAL_UART_ERROR_NONE;
  3418.   huart->RxState = HAL_UART_STATE_BUSY_RX;
  3419.  
  3420.   if (huart->hdmarx != NULL)
  3421.   {
  3422.     /* Set the UART DMA transfer complete callback */
  3423.     huart->hdmarx->XferCpltCallback = UART_DMAReceiveCplt;
  3424.  
  3425.     /* Set the UART DMA Half transfer complete callback */
  3426.     huart->hdmarx->XferHalfCpltCallback = UART_DMARxHalfCplt;
  3427.  
  3428.     /* Set the DMA error callback */
  3429.     huart->hdmarx->XferErrorCallback = UART_DMAError;
  3430.  
  3431.     /* Set the DMA abort callback */
  3432.     huart->hdmarx->XferAbortCallback = NULL;
  3433.  
  3434.     /* Enable the DMA channel */
  3435.     if (HAL_DMA_Start_IT(huart->hdmarx, (uint32_t)&huart->Instance->RDR, (uint32_t)huart->pRxBuffPtr, Size) != HAL_OK)
  3436.     {
  3437.       /* Set error code to DMA */
  3438.       huart->ErrorCode = HAL_UART_ERROR_DMA;
  3439.  
  3440.       __HAL_UNLOCK(huart);
  3441.  
  3442.       /* Restore huart->RxState to ready */
  3443.       huart->RxState = HAL_UART_STATE_READY;
  3444.  
  3445.       return HAL_ERROR;
  3446.     }
  3447.   }
  3448.   __HAL_UNLOCK(huart);
  3449.  
  3450.   /* Enable the UART Parity Error Interrupt */
  3451.   ATOMIC_SET_BIT(huart->Instance->CR1, USART_CR1_PEIE);
  3452.  
  3453.   /* Enable the UART Error Interrupt: (Frame error, noise error, overrun error) */
  3454.   ATOMIC_SET_BIT(huart->Instance->CR3, USART_CR3_EIE);
  3455.  
  3456.   /* Enable the DMA transfer for the receiver request by setting the DMAR bit
  3457.   in the UART CR3 register */
  3458.   ATOMIC_SET_BIT(huart->Instance->CR3, USART_CR3_DMAR);
  3459.  
  3460.   return HAL_OK;
  3461. }
  3462.  
  3463.  
  3464. /**
  3465.   * @brief  End ongoing Tx transfer on UART peripheral (following error detection or Transmit completion).
  3466.   * @param  huart UART handle.
  3467.   * @retval None
  3468.   */
  3469. static void UART_EndTxTransfer(UART_HandleTypeDef *huart)
  3470. {
  3471.   /* Disable TXEIE and TCIE interrupts */
  3472.   ATOMIC_CLEAR_BIT(huart->Instance->CR1, (USART_CR1_TXEIE | USART_CR1_TCIE));
  3473.  
  3474.   /* At end of Tx process, restore huart->gState to Ready */
  3475.   huart->gState = HAL_UART_STATE_READY;
  3476. }
  3477.  
  3478.  
  3479. /**
  3480.   * @brief  End ongoing Rx transfer on UART peripheral (following error detection or Reception completion).
  3481.   * @param  huart UART handle.
  3482.   * @retval None
  3483.   */
  3484. static void UART_EndRxTransfer(UART_HandleTypeDef *huart)
  3485. {
  3486.   /* Disable RXNE, PE and ERR (Frame error, noise error, overrun error) interrupts */
  3487.   ATOMIC_CLEAR_BIT(huart->Instance->CR1, (USART_CR1_RXNEIE | USART_CR1_PEIE));
  3488.   ATOMIC_CLEAR_BIT(huart->Instance->CR3, USART_CR3_EIE);
  3489.  
  3490.   /* In case of reception waiting for IDLE event, disable also the IDLE IE interrupt source */
  3491.   if (huart->ReceptionType == HAL_UART_RECEPTION_TOIDLE)
  3492.   {
  3493.     ATOMIC_CLEAR_BIT(huart->Instance->CR1, USART_CR1_IDLEIE);
  3494.   }
  3495.  
  3496.   /* At end of Rx process, restore huart->RxState to Ready */
  3497.   huart->RxState = HAL_UART_STATE_READY;
  3498.   huart->ReceptionType = HAL_UART_RECEPTION_STANDARD;
  3499.  
  3500.   /* Reset RxIsr function pointer */
  3501.   huart->RxISR = NULL;
  3502. }
  3503.  
  3504.  
  3505. /**
  3506.   * @brief DMA UART transmit process complete callback.
  3507.   * @param hdma DMA handle.
  3508.   * @retval None
  3509.   */
  3510. static void UART_DMATransmitCplt(DMA_HandleTypeDef *hdma)
  3511. {
  3512.   UART_HandleTypeDef *huart = (UART_HandleTypeDef *)(hdma->Parent);
  3513.  
  3514.   /* DMA Normal mode */
  3515.   if (hdma->Init.Mode != DMA_CIRCULAR)
  3516.   {
  3517.     huart->TxXferCount = 0U;
  3518.  
  3519.     /* Disable the DMA transfer for transmit request by resetting the DMAT bit
  3520.        in the UART CR3 register */
  3521.     ATOMIC_CLEAR_BIT(huart->Instance->CR3, USART_CR3_DMAT);
  3522.  
  3523.     /* Enable the UART Transmit Complete Interrupt */
  3524.     ATOMIC_SET_BIT(huart->Instance->CR1, USART_CR1_TCIE);
  3525.   }
  3526.   /* DMA Circular mode */
  3527.   else
  3528.   {
  3529. #if (USE_HAL_UART_REGISTER_CALLBACKS == 1)
  3530.     /*Call registered Tx complete callback*/
  3531.     huart->TxCpltCallback(huart);
  3532. #else
  3533.     /*Call legacy weak Tx complete callback*/
  3534.     HAL_UART_TxCpltCallback(huart);
  3535. #endif /* USE_HAL_UART_REGISTER_CALLBACKS */
  3536.   }
  3537. }
  3538.  
  3539. /**
  3540.   * @brief DMA UART transmit process half complete callback.
  3541.   * @param hdma DMA handle.
  3542.   * @retval None
  3543.   */
  3544. static void UART_DMATxHalfCplt(DMA_HandleTypeDef *hdma)
  3545. {
  3546.   UART_HandleTypeDef *huart = (UART_HandleTypeDef *)(hdma->Parent);
  3547.  
  3548. #if (USE_HAL_UART_REGISTER_CALLBACKS == 1)
  3549.   /*Call registered Tx Half complete callback*/
  3550.   huart->TxHalfCpltCallback(huart);
  3551. #else
  3552.   /*Call legacy weak Tx Half complete callback*/
  3553.   HAL_UART_TxHalfCpltCallback(huart);
  3554. #endif /* USE_HAL_UART_REGISTER_CALLBACKS */
  3555. }
  3556.  
  3557. /**
  3558.   * @brief DMA UART receive process complete callback.
  3559.   * @param hdma DMA handle.
  3560.   * @retval None
  3561.   */
  3562. static void UART_DMAReceiveCplt(DMA_HandleTypeDef *hdma)
  3563. {
  3564.   UART_HandleTypeDef *huart = (UART_HandleTypeDef *)(hdma->Parent);
  3565.  
  3566.   /* DMA Normal mode */
  3567.   if (hdma->Init.Mode != DMA_CIRCULAR)
  3568.   {
  3569.     huart->RxXferCount = 0U;
  3570.  
  3571.     /* Disable PE and ERR (Frame error, noise error, overrun error) interrupts */
  3572.     ATOMIC_CLEAR_BIT(huart->Instance->CR1, USART_CR1_PEIE);
  3573.     ATOMIC_CLEAR_BIT(huart->Instance->CR3, USART_CR3_EIE);
  3574.  
  3575.     /* Disable the DMA transfer for the receiver request by resetting the DMAR bit
  3576.        in the UART CR3 register */
  3577.     ATOMIC_CLEAR_BIT(huart->Instance->CR3, USART_CR3_DMAR);
  3578.  
  3579.     /* At end of Rx process, restore huart->RxState to Ready */
  3580.     huart->RxState = HAL_UART_STATE_READY;
  3581.  
  3582.     /* If Reception till IDLE event has been selected, Disable IDLE Interrupt */
  3583.     if (huart->ReceptionType == HAL_UART_RECEPTION_TOIDLE)
  3584.     {
  3585.       ATOMIC_CLEAR_BIT(huart->Instance->CR1, USART_CR1_IDLEIE);
  3586.     }
  3587.   }
  3588.  
  3589.   /* Check current reception Mode :
  3590.      If Reception till IDLE event has been selected : use Rx Event callback */
  3591.   if (huart->ReceptionType == HAL_UART_RECEPTION_TOIDLE)
  3592.   {
  3593. #if (USE_HAL_UART_REGISTER_CALLBACKS == 1)
  3594.     /*Call registered Rx Event callback*/
  3595.     huart->RxEventCallback(huart, huart->RxXferSize);
  3596. #else
  3597.     /*Call legacy weak Rx Event callback*/
  3598.     HAL_UARTEx_RxEventCallback(huart, huart->RxXferSize);
  3599. #endif /* USE_HAL_UART_REGISTER_CALLBACKS */
  3600.   }
  3601.   else
  3602.   {
  3603.     /* In other cases : use Rx Complete callback */
  3604. #if (USE_HAL_UART_REGISTER_CALLBACKS == 1)
  3605.     /*Call registered Rx complete callback*/
  3606.     huart->RxCpltCallback(huart);
  3607. #else
  3608.     /*Call legacy weak Rx complete callback*/
  3609.     HAL_UART_RxCpltCallback(huart);
  3610. #endif /* USE_HAL_UART_REGISTER_CALLBACKS */
  3611.   }
  3612. }
  3613.  
  3614. /**
  3615.   * @brief DMA UART receive process half complete callback.
  3616.   * @param hdma DMA handle.
  3617.   * @retval None
  3618.   */
  3619. static void UART_DMARxHalfCplt(DMA_HandleTypeDef *hdma)
  3620. {
  3621.   UART_HandleTypeDef *huart = (UART_HandleTypeDef *)(hdma->Parent);
  3622.  
  3623.   /* Check current reception Mode :
  3624.      If Reception till IDLE event has been selected : use Rx Event callback */
  3625.   if (huart->ReceptionType == HAL_UART_RECEPTION_TOIDLE)
  3626.   {
  3627. #if (USE_HAL_UART_REGISTER_CALLBACKS == 1)
  3628.     /*Call registered Rx Event callback*/
  3629.     huart->RxEventCallback(huart, huart->RxXferSize / 2U);
  3630. #else
  3631.     /*Call legacy weak Rx Event callback*/
  3632.     HAL_UARTEx_RxEventCallback(huart, huart->RxXferSize / 2U);
  3633. #endif /* USE_HAL_UART_REGISTER_CALLBACKS */
  3634.   }
  3635.   else
  3636.   {
  3637.     /* In other cases : use Rx Half Complete callback */
  3638. #if (USE_HAL_UART_REGISTER_CALLBACKS == 1)
  3639.     /*Call registered Rx Half complete callback*/
  3640.     huart->RxHalfCpltCallback(huart);
  3641. #else
  3642.     /*Call legacy weak Rx Half complete callback*/
  3643.     HAL_UART_RxHalfCpltCallback(huart);
  3644. #endif /* USE_HAL_UART_REGISTER_CALLBACKS */
  3645.   }
  3646. }
  3647.  
  3648. /**
  3649.   * @brief DMA UART communication error callback.
  3650.   * @param hdma DMA handle.
  3651.   * @retval None
  3652.   */
  3653. static void UART_DMAError(DMA_HandleTypeDef *hdma)
  3654. {
  3655.   UART_HandleTypeDef *huart = (UART_HandleTypeDef *)(hdma->Parent);
  3656.  
  3657.   const HAL_UART_StateTypeDef gstate = huart->gState;
  3658.   const HAL_UART_StateTypeDef rxstate = huart->RxState;
  3659.  
  3660.   /* Stop UART DMA Tx request if ongoing */
  3661.   if ((HAL_IS_BIT_SET(huart->Instance->CR3, USART_CR3_DMAT)) &&
  3662.       (gstate == HAL_UART_STATE_BUSY_TX))
  3663.   {
  3664.     huart->TxXferCount = 0U;
  3665.     UART_EndTxTransfer(huart);
  3666.   }
  3667.  
  3668.   /* Stop UART DMA Rx request if ongoing */
  3669.   if ((HAL_IS_BIT_SET(huart->Instance->CR3, USART_CR3_DMAR)) &&
  3670.       (rxstate == HAL_UART_STATE_BUSY_RX))
  3671.   {
  3672.     huart->RxXferCount = 0U;
  3673.     UART_EndRxTransfer(huart);
  3674.   }
  3675.  
  3676.   huart->ErrorCode |= HAL_UART_ERROR_DMA;
  3677.  
  3678. #if (USE_HAL_UART_REGISTER_CALLBACKS == 1)
  3679.   /*Call registered error callback*/
  3680.   huart->ErrorCallback(huart);
  3681. #else
  3682.   /*Call legacy weak error callback*/
  3683.   HAL_UART_ErrorCallback(huart);
  3684. #endif /* USE_HAL_UART_REGISTER_CALLBACKS */
  3685. }
  3686.  
  3687. /**
  3688.   * @brief  DMA UART communication abort callback, when initiated by HAL services on Error
  3689.   *         (To be called at end of DMA Abort procedure following error occurrence).
  3690.   * @param  hdma DMA handle.
  3691.   * @retval None
  3692.   */
  3693. static void UART_DMAAbortOnError(DMA_HandleTypeDef *hdma)
  3694. {
  3695.   UART_HandleTypeDef *huart = (UART_HandleTypeDef *)(hdma->Parent);
  3696.   huart->RxXferCount = 0U;
  3697.   huart->TxXferCount = 0U;
  3698.  
  3699. #if (USE_HAL_UART_REGISTER_CALLBACKS == 1)
  3700.   /*Call registered error callback*/
  3701.   huart->ErrorCallback(huart);
  3702. #else
  3703.   /*Call legacy weak error callback*/
  3704.   HAL_UART_ErrorCallback(huart);
  3705. #endif /* USE_HAL_UART_REGISTER_CALLBACKS */
  3706. }
  3707.  
  3708. /**
  3709.   * @brief  DMA UART Tx communication abort callback, when initiated by user
  3710.   *         (To be called at end of DMA Tx Abort procedure following user abort request).
  3711.   * @note   When this callback is executed, User Abort complete call back is called only if no
  3712.   *         Abort still ongoing for Rx DMA Handle.
  3713.   * @param  hdma DMA handle.
  3714.   * @retval None
  3715.   */
  3716. static void UART_DMATxAbortCallback(DMA_HandleTypeDef *hdma)
  3717. {
  3718.   UART_HandleTypeDef *huart = (UART_HandleTypeDef *)(hdma->Parent);
  3719.  
  3720.   huart->hdmatx->XferAbortCallback = NULL;
  3721.  
  3722.   /* Check if an Abort process is still ongoing */
  3723.   if (huart->hdmarx != NULL)
  3724.   {
  3725.     if (huart->hdmarx->XferAbortCallback != NULL)
  3726.     {
  3727.       return;
  3728.     }
  3729.   }
  3730.  
  3731.   /* No Abort process still ongoing : All DMA channels are aborted, call user Abort Complete callback */
  3732.   huart->TxXferCount = 0U;
  3733.   huart->RxXferCount = 0U;
  3734.  
  3735.   /* Reset errorCode */
  3736.   huart->ErrorCode = HAL_UART_ERROR_NONE;
  3737.  
  3738.   /* Clear the Error flags in the ICR register */
  3739.   __HAL_UART_CLEAR_FLAG(huart, UART_CLEAR_OREF | UART_CLEAR_NEF | UART_CLEAR_PEF | UART_CLEAR_FEF);
  3740.  
  3741.  
  3742.   /* Restore huart->gState and huart->RxState to Ready */
  3743.   huart->gState  = HAL_UART_STATE_READY;
  3744.   huart->RxState = HAL_UART_STATE_READY;
  3745.   huart->ReceptionType = HAL_UART_RECEPTION_STANDARD;
  3746.  
  3747.   /* Call user Abort complete callback */
  3748. #if (USE_HAL_UART_REGISTER_CALLBACKS == 1)
  3749.   /* Call registered Abort complete callback */
  3750.   huart->AbortCpltCallback(huart);
  3751. #else
  3752.   /* Call legacy weak Abort complete callback */
  3753.   HAL_UART_AbortCpltCallback(huart);
  3754. #endif /* USE_HAL_UART_REGISTER_CALLBACKS */
  3755. }
  3756.  
  3757.  
  3758. /**
  3759.   * @brief  DMA UART Rx communication abort callback, when initiated by user
  3760.   *         (To be called at end of DMA Rx Abort procedure following user abort request).
  3761.   * @note   When this callback is executed, User Abort complete call back is called only if no
  3762.   *         Abort still ongoing for Tx DMA Handle.
  3763.   * @param  hdma DMA handle.
  3764.   * @retval None
  3765.   */
  3766. static void UART_DMARxAbortCallback(DMA_HandleTypeDef *hdma)
  3767. {
  3768.   UART_HandleTypeDef *huart = (UART_HandleTypeDef *)(hdma->Parent);
  3769.  
  3770.   huart->hdmarx->XferAbortCallback = NULL;
  3771.  
  3772.   /* Check if an Abort process is still ongoing */
  3773.   if (huart->hdmatx != NULL)
  3774.   {
  3775.     if (huart->hdmatx->XferAbortCallback != NULL)
  3776.     {
  3777.       return;
  3778.     }
  3779.   }
  3780.  
  3781.   /* No Abort process still ongoing : All DMA channels are aborted, call user Abort Complete callback */
  3782.   huart->TxXferCount = 0U;
  3783.   huart->RxXferCount = 0U;
  3784.  
  3785.   /* Reset errorCode */
  3786.   huart->ErrorCode = HAL_UART_ERROR_NONE;
  3787.  
  3788.   /* Clear the Error flags in the ICR register */
  3789.   __HAL_UART_CLEAR_FLAG(huart, UART_CLEAR_OREF | UART_CLEAR_NEF | UART_CLEAR_PEF | UART_CLEAR_FEF);
  3790.  
  3791.   /* Discard the received data */
  3792.   __HAL_UART_SEND_REQ(huart, UART_RXDATA_FLUSH_REQUEST);
  3793.  
  3794.   /* Restore huart->gState and huart->RxState to Ready */
  3795.   huart->gState  = HAL_UART_STATE_READY;
  3796.   huart->RxState = HAL_UART_STATE_READY;
  3797.   huart->ReceptionType = HAL_UART_RECEPTION_STANDARD;
  3798.  
  3799.   /* Call user Abort complete callback */
  3800. #if (USE_HAL_UART_REGISTER_CALLBACKS == 1)
  3801.   /* Call registered Abort complete callback */
  3802.   huart->AbortCpltCallback(huart);
  3803. #else
  3804.   /* Call legacy weak Abort complete callback */
  3805.   HAL_UART_AbortCpltCallback(huart);
  3806. #endif /* USE_HAL_UART_REGISTER_CALLBACKS */
  3807. }
  3808.  
  3809.  
  3810. /**
  3811.   * @brief  DMA UART Tx communication abort callback, when initiated by user by a call to
  3812.   *         HAL_UART_AbortTransmit_IT API (Abort only Tx transfer)
  3813.   *         (This callback is executed at end of DMA Tx Abort procedure following user abort request,
  3814.   *         and leads to user Tx Abort Complete callback execution).
  3815.   * @param  hdma DMA handle.
  3816.   * @retval None
  3817.   */
  3818. static void UART_DMATxOnlyAbortCallback(DMA_HandleTypeDef *hdma)
  3819. {
  3820.   UART_HandleTypeDef *huart = (UART_HandleTypeDef *)(hdma->Parent);
  3821.  
  3822.   huart->TxXferCount = 0U;
  3823.  
  3824.  
  3825.   /* Restore huart->gState to Ready */
  3826.   huart->gState = HAL_UART_STATE_READY;
  3827.  
  3828.   /* Call user Abort complete callback */
  3829. #if (USE_HAL_UART_REGISTER_CALLBACKS == 1)
  3830.   /* Call registered Abort Transmit Complete Callback */
  3831.   huart->AbortTransmitCpltCallback(huart);
  3832. #else
  3833.   /* Call legacy weak Abort Transmit Complete Callback */
  3834.   HAL_UART_AbortTransmitCpltCallback(huart);
  3835. #endif /* USE_HAL_UART_REGISTER_CALLBACKS */
  3836. }
  3837.  
  3838. /**
  3839.   * @brief  DMA UART Rx communication abort callback, when initiated by user by a call to
  3840.   *         HAL_UART_AbortReceive_IT API (Abort only Rx transfer)
  3841.   *         (This callback is executed at end of DMA Rx Abort procedure following user abort request,
  3842.   *         and leads to user Rx Abort Complete callback execution).
  3843.   * @param  hdma DMA handle.
  3844.   * @retval None
  3845.   */
  3846. static void UART_DMARxOnlyAbortCallback(DMA_HandleTypeDef *hdma)
  3847. {
  3848.   UART_HandleTypeDef *huart = (UART_HandleTypeDef *)((DMA_HandleTypeDef *)hdma)->Parent;
  3849.  
  3850.   huart->RxXferCount = 0U;
  3851.  
  3852.   /* Clear the Error flags in the ICR register */
  3853.   __HAL_UART_CLEAR_FLAG(huart, UART_CLEAR_OREF | UART_CLEAR_NEF | UART_CLEAR_PEF | UART_CLEAR_FEF);
  3854.  
  3855.   /* Discard the received data */
  3856.   __HAL_UART_SEND_REQ(huart, UART_RXDATA_FLUSH_REQUEST);
  3857.  
  3858.   /* Restore huart->RxState to Ready */
  3859.   huart->RxState = HAL_UART_STATE_READY;
  3860.   huart->ReceptionType = HAL_UART_RECEPTION_STANDARD;
  3861.  
  3862.   /* Call user Abort complete callback */
  3863. #if (USE_HAL_UART_REGISTER_CALLBACKS == 1)
  3864.   /* Call registered Abort Receive Complete Callback */
  3865.   huart->AbortReceiveCpltCallback(huart);
  3866. #else
  3867.   /* Call legacy weak Abort Receive Complete Callback */
  3868.   HAL_UART_AbortReceiveCpltCallback(huart);
  3869. #endif /* USE_HAL_UART_REGISTER_CALLBACKS */
  3870. }
  3871.  
  3872. /**
  3873.   * @brief TX interrupt handler for 7 or 8 bits data word length .
  3874.   * @note   Function is called under interruption only, once
  3875.   *         interruptions have been enabled by HAL_UART_Transmit_IT().
  3876.   * @param huart UART handle.
  3877.   * @retval None
  3878.   */
  3879. static void UART_TxISR_8BIT(UART_HandleTypeDef *huart)
  3880. {
  3881.   /* Check that a Tx process is ongoing */
  3882.   if (huart->gState == HAL_UART_STATE_BUSY_TX)
  3883.   {
  3884.     if (huart->TxXferCount == 0U)
  3885.     {
  3886.       /* Disable the UART Transmit Data Register Empty Interrupt */
  3887.       ATOMIC_CLEAR_BIT(huart->Instance->CR1, USART_CR1_TXEIE);
  3888.  
  3889.       /* Enable the UART Transmit Complete Interrupt */
  3890.       ATOMIC_SET_BIT(huart->Instance->CR1, USART_CR1_TCIE);
  3891.     }
  3892.     else
  3893.     {
  3894.       huart->Instance->TDR = (uint8_t)(*huart->pTxBuffPtr & (uint8_t)0xFF);
  3895.       huart->pTxBuffPtr++;
  3896.       huart->TxXferCount--;
  3897.     }
  3898.   }
  3899. }
  3900.  
  3901. /**
  3902.   * @brief TX interrupt handler for 9 bits data word length.
  3903.   * @note   Function is called under interruption only, once
  3904.   *         interruptions have been enabled by HAL_UART_Transmit_IT().
  3905.   * @param huart UART handle.
  3906.   * @retval None
  3907.   */
  3908. static void UART_TxISR_16BIT(UART_HandleTypeDef *huart)
  3909. {
  3910.   uint16_t *tmp;
  3911.  
  3912.   /* Check that a Tx process is ongoing */
  3913.   if (huart->gState == HAL_UART_STATE_BUSY_TX)
  3914.   {
  3915.     if (huart->TxXferCount == 0U)
  3916.     {
  3917.       /* Disable the UART Transmit Data Register Empty Interrupt */
  3918.       ATOMIC_CLEAR_BIT(huart->Instance->CR1, USART_CR1_TXEIE);
  3919.  
  3920.       /* Enable the UART Transmit Complete Interrupt */
  3921.       ATOMIC_SET_BIT(huart->Instance->CR1, USART_CR1_TCIE);
  3922.     }
  3923.     else
  3924.     {
  3925.       tmp = (uint16_t *) huart->pTxBuffPtr;
  3926.       huart->Instance->TDR = (((uint32_t)(*tmp)) & 0x01FFUL);
  3927.       huart->pTxBuffPtr += 2U;
  3928.       huart->TxXferCount--;
  3929.     }
  3930.   }
  3931. }
  3932.  
  3933.  
  3934. /**
  3935.   * @brief  Wrap up transmission in non-blocking mode.
  3936.   * @param  huart pointer to a UART_HandleTypeDef structure that contains
  3937.   *                the configuration information for the specified UART module.
  3938.   * @retval None
  3939.   */
  3940. static void UART_EndTransmit_IT(UART_HandleTypeDef *huart)
  3941. {
  3942.   /* Disable the UART Transmit Complete Interrupt */
  3943.   ATOMIC_CLEAR_BIT(huart->Instance->CR1, USART_CR1_TCIE);
  3944.  
  3945.   /* Tx process is ended, restore huart->gState to Ready */
  3946.   huart->gState = HAL_UART_STATE_READY;
  3947.  
  3948.   /* Cleat TxISR function pointer */
  3949.   huart->TxISR = NULL;
  3950.  
  3951. #if (USE_HAL_UART_REGISTER_CALLBACKS == 1)
  3952.   /*Call registered Tx complete callback*/
  3953.   huart->TxCpltCallback(huart);
  3954. #else
  3955.   /*Call legacy weak Tx complete callback*/
  3956.   HAL_UART_TxCpltCallback(huart);
  3957. #endif /* USE_HAL_UART_REGISTER_CALLBACKS */
  3958. }
  3959.  
  3960. /**
  3961.   * @brief RX interrupt handler for 7 or 8 bits data word length .
  3962.   * @param huart UART handle.
  3963.   * @retval None
  3964.   */
  3965. static void UART_RxISR_8BIT(UART_HandleTypeDef *huart)
  3966. {
  3967.   uint16_t uhMask = huart->Mask;
  3968.   uint16_t  uhdata;
  3969.  
  3970.   /* Check that a Rx process is ongoing */
  3971.   if (huart->RxState == HAL_UART_STATE_BUSY_RX)
  3972.   {
  3973.     uhdata = (uint16_t) READ_REG(huart->Instance->RDR);
  3974.     *huart->pRxBuffPtr = (uint8_t)(uhdata & (uint8_t)uhMask);
  3975.     huart->pRxBuffPtr++;
  3976.     huart->RxXferCount--;
  3977.  
  3978.     if (huart->RxXferCount == 0U)
  3979.     {
  3980.       /* Disable the UART Parity Error Interrupt and RXNE interrupts */
  3981.       ATOMIC_CLEAR_BIT(huart->Instance->CR1, (USART_CR1_RXNEIE | USART_CR1_PEIE));
  3982.  
  3983.       /* Disable the UART Error Interrupt: (Frame error, noise error, overrun error) */
  3984.       ATOMIC_CLEAR_BIT(huart->Instance->CR3, USART_CR3_EIE);
  3985.  
  3986.       /* Rx process is completed, restore huart->RxState to Ready */
  3987.       huart->RxState = HAL_UART_STATE_READY;
  3988.  
  3989.       /* Clear RxISR function pointer */
  3990.       huart->RxISR = NULL;
  3991.  
  3992.       /* Check current reception Mode :
  3993.          If Reception till IDLE event has been selected : */
  3994.       if (huart->ReceptionType == HAL_UART_RECEPTION_TOIDLE)
  3995.       {
  3996.         /* Set reception type to Standard */
  3997.         huart->ReceptionType = HAL_UART_RECEPTION_STANDARD;
  3998.  
  3999.         /* Disable IDLE interrupt */
  4000.         ATOMIC_CLEAR_BIT(huart->Instance->CR1, USART_CR1_IDLEIE);
  4001.  
  4002.         if (__HAL_UART_GET_FLAG(huart, UART_FLAG_IDLE) == SET)
  4003.         {
  4004.           /* Clear IDLE Flag */
  4005.           __HAL_UART_CLEAR_FLAG(huart, UART_CLEAR_IDLEF);
  4006.         }
  4007. #if (USE_HAL_UART_REGISTER_CALLBACKS == 1)
  4008.         /*Call registered Rx Event callback*/
  4009.         huart->RxEventCallback(huart, huart->RxXferSize);
  4010. #else
  4011.         /*Call legacy weak Rx Event callback*/
  4012.         HAL_UARTEx_RxEventCallback(huart, huart->RxXferSize);
  4013. #endif /* (USE_HAL_UART_REGISTER_CALLBACKS) */
  4014.       }
  4015.       else
  4016.       {
  4017.         /* Standard reception API called */
  4018. #if (USE_HAL_UART_REGISTER_CALLBACKS == 1)
  4019.         /*Call registered Rx complete callback*/
  4020.         huart->RxCpltCallback(huart);
  4021. #else
  4022.         /*Call legacy weak Rx complete callback*/
  4023.         HAL_UART_RxCpltCallback(huart);
  4024. #endif /* USE_HAL_UART_REGISTER_CALLBACKS */
  4025.       }
  4026.     }
  4027.   }
  4028.   else
  4029.   {
  4030.     /* Clear RXNE interrupt flag */
  4031.     __HAL_UART_SEND_REQ(huart, UART_RXDATA_FLUSH_REQUEST);
  4032.   }
  4033. }
  4034.  
  4035. /**
  4036.   * @brief RX interrupt handler for 9 bits data word length .
  4037.   * @note   Function is called under interruption only, once
  4038.   *         interruptions have been enabled by HAL_UART_Receive_IT()
  4039.   * @param huart UART handle.
  4040.   * @retval None
  4041.   */
  4042. static void UART_RxISR_16BIT(UART_HandleTypeDef *huart)
  4043. {
  4044.   uint16_t *tmp;
  4045.   uint16_t uhMask = huart->Mask;
  4046.   uint16_t  uhdata;
  4047.  
  4048.   /* Check that a Rx process is ongoing */
  4049.   if (huart->RxState == HAL_UART_STATE_BUSY_RX)
  4050.   {
  4051.     uhdata = (uint16_t) READ_REG(huart->Instance->RDR);
  4052.     tmp = (uint16_t *) huart->pRxBuffPtr ;
  4053.     *tmp = (uint16_t)(uhdata & uhMask);
  4054.     huart->pRxBuffPtr += 2U;
  4055.     huart->RxXferCount--;
  4056.  
  4057.     if (huart->RxXferCount == 0U)
  4058.     {
  4059.       /* Disable the UART Parity Error Interrupt and RXNE interrupt*/
  4060.       ATOMIC_CLEAR_BIT(huart->Instance->CR1, (USART_CR1_RXNEIE | USART_CR1_PEIE));
  4061.  
  4062.       /* Disable the UART Error Interrupt: (Frame error, noise error, overrun error) */
  4063.       ATOMIC_CLEAR_BIT(huart->Instance->CR3, USART_CR3_EIE);
  4064.  
  4065.       /* Rx process is completed, restore huart->RxState to Ready */
  4066.       huart->RxState = HAL_UART_STATE_READY;
  4067.  
  4068.       /* Clear RxISR function pointer */
  4069.       huart->RxISR = NULL;
  4070.  
  4071.       /* Check current reception Mode :
  4072.          If Reception till IDLE event has been selected : */
  4073.       if (huart->ReceptionType == HAL_UART_RECEPTION_TOIDLE)
  4074.       {
  4075.         /* Set reception type to Standard */
  4076.         huart->ReceptionType = HAL_UART_RECEPTION_STANDARD;
  4077.  
  4078.         /* Disable IDLE interrupt */
  4079.         ATOMIC_CLEAR_BIT(huart->Instance->CR1, USART_CR1_IDLEIE);
  4080.  
  4081.         if (__HAL_UART_GET_FLAG(huart, UART_FLAG_IDLE) == SET)
  4082.         {
  4083.           /* Clear IDLE Flag */
  4084.           __HAL_UART_CLEAR_FLAG(huart, UART_CLEAR_IDLEF);
  4085.         }
  4086. #if (USE_HAL_UART_REGISTER_CALLBACKS == 1)
  4087.         /*Call registered Rx Event callback*/
  4088.         huart->RxEventCallback(huart, huart->RxXferSize);
  4089. #else
  4090.         /*Call legacy weak Rx Event callback*/
  4091.         HAL_UARTEx_RxEventCallback(huart, huart->RxXferSize);
  4092. #endif /* (USE_HAL_UART_REGISTER_CALLBACKS) */
  4093.       }
  4094.       else
  4095.       {
  4096.         /* Standard reception API called */
  4097. #if (USE_HAL_UART_REGISTER_CALLBACKS == 1)
  4098.         /*Call registered Rx complete callback*/
  4099.         huart->RxCpltCallback(huart);
  4100. #else
  4101.         /*Call legacy weak Rx complete callback*/
  4102.         HAL_UART_RxCpltCallback(huart);
  4103. #endif /* USE_HAL_UART_REGISTER_CALLBACKS */
  4104.       }
  4105.     }
  4106.   }
  4107.   else
  4108.   {
  4109.     /* Clear RXNE interrupt flag */
  4110.     __HAL_UART_SEND_REQ(huart, UART_RXDATA_FLUSH_REQUEST);
  4111.   }
  4112. }
  4113.  
  4114.  
  4115. /**
  4116.   * @}
  4117.   */
  4118.  
  4119. #endif /* HAL_UART_MODULE_ENABLED */
  4120. /**
  4121.   * @}
  4122.   */
  4123.  
  4124. /**
  4125.   * @}
  4126.   */
  4127.  
  4128. /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
  4129.