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  1. /**
  2.   ******************************************************************************
  3.   * @file    stm32l1xx_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.   *           + Peripheral State and Errors functions
  12.   *
  13.   ******************************************************************************
  14.   * @attention
  15.   *
  16.   * Copyright (c) 2016 STMicroelectronics.
  17.   * All rights reserved.
  18.   *
  19.   * This software is licensed under terms that can be found in the LICENSE file
  20.   * in the root directory of this software component.
  21.   * If no LICENSE file comes with this software, it is provided AS-IS.
  22.   *
  23.   ******************************************************************************
  24.   @verbatim
  25.   ==============================================================================
  26.                         ##### How to use this driver #####
  27.   ==============================================================================
  28.   [..]
  29.     The UART HAL driver can be used as follows:
  30.  
  31.     (#) Declare a UART_HandleTypeDef handle structure (eg. UART_HandleTypeDef huart).
  32.     (#) Initialize the UART low level resources by implementing the HAL_UART_MspInit() API:
  33.         (##) Enable the USARTx interface clock.
  34.         (##) UART pins configuration:
  35.             (+++) Enable the clock for the UART GPIOs.
  36.             (+++) Configure the UART TX/RX pins as alternate function pull-up.
  37.         (##) NVIC configuration if you need to use interrupt process (HAL_UART_Transmit_IT()
  38.              and HAL_UART_Receive_IT() APIs):
  39.             (+++) Configure the USARTx interrupt priority.
  40.             (+++) Enable the NVIC USART IRQ handle.
  41.         (##) DMA Configuration if you need to use DMA process (HAL_UART_Transmit_DMA()
  42.              and HAL_UART_Receive_DMA() APIs):
  43.             (+++) Declare a DMA handle structure for the Tx/Rx channel.
  44.             (+++) Enable the DMAx interface clock.
  45.             (+++) Configure the declared DMA handle structure with the required
  46.                   Tx/Rx parameters.
  47.             (+++) Configure the DMA Tx/Rx channel.
  48.             (+++) Associate the initialized DMA handle to the UART DMA Tx/Rx handle.
  49.             (+++) Configure the priority and enable the NVIC for the transfer complete
  50.                   interrupt on the DMA Tx/Rx channel.
  51.             (+++) Configure the USARTx interrupt priority and enable the NVIC USART IRQ handle
  52.                   (used for last byte sending completion detection in DMA non circular mode)
  53.  
  54.     (#) Program the Baud Rate, Word Length, Stop Bit, Parity, Hardware
  55.         flow control and Mode(Receiver/Transmitter) in the huart Init structure.
  56.  
  57.     (#) For the UART asynchronous mode, initialize the UART registers by calling
  58.         the HAL_UART_Init() API.
  59.  
  60.     (#) For the UART Half duplex mode, initialize the UART registers by calling
  61.         the HAL_HalfDuplex_Init() API.
  62.  
  63.     (#) For the LIN mode, initialize the UART registers by calling the HAL_LIN_Init() API.
  64.  
  65.     (#) For the Multi-Processor mode, initialize the UART registers by calling
  66.         the HAL_MultiProcessor_Init() API.
  67.  
  68.      [..]
  69.        (@) The specific UART interrupts (Transmission complete interrupt,
  70.             RXNE interrupt and Error Interrupts) will be managed using the macros
  71.             __HAL_UART_ENABLE_IT() and __HAL_UART_DISABLE_IT() inside the transmit
  72.             and receive process.
  73.  
  74.      [..]
  75.        (@) These APIs (HAL_UART_Init() and HAL_HalfDuplex_Init()) configure also the
  76.             low level Hardware GPIO, CLOCK, CORTEX...etc) by calling the customized
  77.             HAL_UART_MspInit() API.
  78.  
  79.     ##### Callback registration #####
  80.     ==================================
  81.  
  82.     [..]
  83.     The compilation define USE_HAL_UART_REGISTER_CALLBACKS when set to 1
  84.     allows the user to configure dynamically the driver callbacks.
  85.  
  86.     [..]
  87.     Use Function HAL_UART_RegisterCallback() to register a user callback.
  88.     Function HAL_UART_RegisterCallback() allows to register following callbacks:
  89.     (+) TxHalfCpltCallback        : Tx Half Complete Callback.
  90.     (+) TxCpltCallback            : Tx Complete Callback.
  91.     (+) RxHalfCpltCallback        : Rx Half Complete Callback.
  92.     (+) RxCpltCallback            : Rx Complete Callback.
  93.     (+) ErrorCallback             : Error Callback.
  94.     (+) AbortCpltCallback         : Abort Complete Callback.
  95.     (+) AbortTransmitCpltCallback : Abort Transmit Complete Callback.
  96.     (+) AbortReceiveCpltCallback  : Abort Receive Complete Callback.
  97.     (+) MspInitCallback           : UART MspInit.
  98.     (+) MspDeInitCallback         : UART MspDeInit.
  99.     This function takes as parameters the HAL peripheral handle, the Callback ID
  100.     and a pointer to the user callback function.
  101.  
  102.     [..]
  103.     Use function HAL_UART_UnRegisterCallback() to reset a callback to the default
  104.     weak (surcharged) function.
  105.     HAL_UART_UnRegisterCallback() takes as parameters the HAL peripheral handle,
  106.     and the Callback ID.
  107.     This function allows to reset following callbacks:
  108.     (+) TxHalfCpltCallback        : Tx Half Complete Callback.
  109.     (+) TxCpltCallback            : Tx Complete Callback.
  110.     (+) RxHalfCpltCallback        : Rx Half Complete Callback.
  111.     (+) RxCpltCallback            : Rx Complete Callback.
  112.     (+) ErrorCallback             : Error Callback.
  113.     (+) AbortCpltCallback         : Abort Complete Callback.
  114.     (+) AbortTransmitCpltCallback : Abort Transmit Complete Callback.
  115.     (+) AbortReceiveCpltCallback  : Abort Receive Complete Callback.
  116.     (+) MspInitCallback           : UART MspInit.
  117.     (+) MspDeInitCallback         : UART MspDeInit.
  118.  
  119.     [..]
  120.     For specific callback RxEventCallback, use dedicated registration/reset functions:
  121.     respectively HAL_UART_RegisterRxEventCallback() , HAL_UART_UnRegisterRxEventCallback().
  122.  
  123.     [..]
  124.     By default, after the HAL_UART_Init() and when the state is HAL_UART_STATE_RESET
  125.     all callbacks are set to the corresponding weak (surcharged) functions:
  126.     examples HAL_UART_TxCpltCallback(), HAL_UART_RxHalfCpltCallback().
  127.     Exception done for MspInit and MspDeInit functions that are respectively
  128.     reset to the legacy weak (surcharged) functions in the HAL_UART_Init()
  129.     and HAL_UART_DeInit() only when these callbacks are null (not registered beforehand).
  130.     If not, MspInit or MspDeInit are not null, the HAL_UART_Init() and HAL_UART_DeInit()
  131.     keep and use the user MspInit/MspDeInit callbacks (registered beforehand).
  132.  
  133.     [..]
  134.     Callbacks can be registered/unregistered in HAL_UART_STATE_READY state only.
  135.     Exception done MspInit/MspDeInit that can be registered/unregistered
  136.     in HAL_UART_STATE_READY or HAL_UART_STATE_RESET state, thus registered (user)
  137.     MspInit/DeInit callbacks can be used during the Init/DeInit.
  138.     In that case first register the MspInit/MspDeInit user callbacks
  139.     using HAL_UART_RegisterCallback() before calling HAL_UART_DeInit()
  140.     or HAL_UART_Init() function.
  141.  
  142.     [..]
  143.     When The compilation define USE_HAL_UART_REGISTER_CALLBACKS is set to 0 or
  144.     not defined, the callback registration feature is not available
  145.     and weak (surcharged) callbacks are used.
  146.  
  147.      [..]
  148.         Three operation modes are available within this driver :
  149.  
  150.      *** Polling mode IO operation ***
  151.      =================================
  152.      [..]
  153.        (+) Send an amount of data in blocking mode using HAL_UART_Transmit()
  154.        (+) Receive an amount of data in blocking mode using HAL_UART_Receive()
  155.  
  156.      *** Interrupt mode IO operation ***
  157.      ===================================
  158.      [..]
  159.        (+) Send an amount of data in non blocking mode using HAL_UART_Transmit_IT()
  160.        (+) At transmission end of transfer HAL_UART_TxCpltCallback is executed and user can
  161.             add his own code by customization of function pointer HAL_UART_TxCpltCallback
  162.        (+) Receive an amount of data in non blocking mode using HAL_UART_Receive_IT()
  163.        (+) At reception end of transfer HAL_UART_RxCpltCallback is executed and user can
  164.             add his own code by customization of function pointer HAL_UART_RxCpltCallback
  165.        (+) In case of transfer Error, HAL_UART_ErrorCallback() function is executed and user can
  166.             add his own code by customization of function pointer HAL_UART_ErrorCallback
  167.  
  168.      *** DMA mode IO operation ***
  169.      ==============================
  170.      [..]
  171.        (+) Send an amount of data in non blocking mode (DMA) using HAL_UART_Transmit_DMA()
  172.        (+) At transmission end of half transfer HAL_UART_TxHalfCpltCallback is executed and user can
  173.             add his own code by customization of function pointer HAL_UART_TxHalfCpltCallback
  174.        (+) At transmission end of transfer HAL_UART_TxCpltCallback is executed and user can
  175.             add his own code by customization of function pointer HAL_UART_TxCpltCallback
  176.        (+) Receive an amount of data in non blocking mode (DMA) using HAL_UART_Receive_DMA()
  177.        (+) At reception end of half transfer HAL_UART_RxHalfCpltCallback is executed and user can
  178.             add his own code by customization of function pointer HAL_UART_RxHalfCpltCallback
  179.        (+) At reception end of transfer HAL_UART_RxCpltCallback is executed and user can
  180.             add his own code by customization of function pointer HAL_UART_RxCpltCallback
  181.        (+) In case of transfer Error, HAL_UART_ErrorCallback() function is executed and user can
  182.             add his own code by customization of function pointer HAL_UART_ErrorCallback
  183.        (+) Pause the DMA Transfer using HAL_UART_DMAPause()
  184.        (+) Resume the DMA Transfer using HAL_UART_DMAResume()
  185.        (+) Stop the DMA Transfer using HAL_UART_DMAStop()
  186.  
  187.  
  188.     [..] This subsection also provides a set of additional functions providing enhanced reception
  189.     services to user. (For example, these functions allow application to handle use cases
  190.     where number of data to be received is unknown).
  191.  
  192.     (#) Compared to standard reception services which only consider number of received
  193.         data elements as reception completion criteria, these functions also consider additional events
  194.         as triggers for updating reception status to caller :
  195.        (+) Detection of inactivity period (RX line has not been active for a given period).
  196.           (++) RX inactivity detected by IDLE event, i.e. RX line has been in idle state (normally high state)
  197.                for 1 frame time, after last received byte.
  198.  
  199.     (#) There are two mode of transfer:
  200.        (+) Blocking mode: The reception is performed in polling mode, until either expected number of data is received,
  201.            or till IDLE event occurs. Reception is handled only during function execution.
  202.            When function exits, no data reception could occur. HAL status and number of actually received data elements,
  203.            are returned by function after finishing transfer.
  204.        (+) Non-Blocking mode: The reception is performed using Interrupts or DMA.
  205.            These API's return the HAL status.
  206.            The end of the data processing will be indicated through the
  207.            dedicated UART IRQ when using Interrupt mode or the DMA IRQ when using DMA mode.
  208.            The HAL_UARTEx_RxEventCallback() user callback will be executed during Receive process
  209.            The HAL_UART_ErrorCallback()user callback will be executed when a reception error is detected.
  210.  
  211.     (#) Blocking mode API:
  212.         (+) HAL_UARTEx_ReceiveToIdle()
  213.  
  214.     (#) Non-Blocking mode API with Interrupt:
  215.         (+) HAL_UARTEx_ReceiveToIdle_IT()
  216.  
  217.     (#) Non-Blocking mode API with DMA:
  218.         (+) HAL_UARTEx_ReceiveToIdle_DMA()
  219.  
  220.  
  221.      *** UART HAL driver macros list ***
  222.      =============================================
  223.      [..]
  224.        Below the list of most used macros in UART HAL driver.
  225.  
  226.       (+) __HAL_UART_ENABLE: Enable the UART peripheral
  227.       (+) __HAL_UART_DISABLE: Disable the UART peripheral
  228.       (+) __HAL_UART_GET_FLAG : Check whether the specified UART flag is set or not
  229.       (+) __HAL_UART_CLEAR_FLAG : Clear the specified UART pending flag
  230.       (+) __HAL_UART_ENABLE_IT: Enable the specified UART interrupt
  231.       (+) __HAL_UART_DISABLE_IT: Disable the specified UART interrupt
  232.       (+) __HAL_UART_GET_IT_SOURCE: Check whether the specified UART interrupt has occurred or not
  233.  
  234.      [..]
  235.        (@) You can refer to the UART HAL driver header file for more useful macros
  236.  
  237.   @endverbatim
  238.      [..]
  239.        (@) Additional remark: If the parity is enabled, then the MSB bit of the data written
  240.            in the data register is transmitted but is changed by the parity bit.
  241.            Depending on the frame length defined by the M bit (8-bits or 9-bits),
  242.            the possible UART frame formats are as listed in the following table:
  243.     +-------------------------------------------------------------+
  244.     |   M bit |  PCE bit  |            UART frame                 |
  245.     |---------------------|---------------------------------------|
  246.     |    0    |    0      |    | SB | 8 bit data | STB |          |
  247.     |---------|-----------|---------------------------------------|
  248.     |    0    |    1      |    | SB | 7 bit data | PB | STB |     |
  249.     |---------|-----------|---------------------------------------|
  250.     |    1    |    0      |    | SB | 9 bit data | STB |          |
  251.     |---------|-----------|---------------------------------------|
  252.     |    1    |    1      |    | SB | 8 bit data | PB | STB |     |
  253.     +-------------------------------------------------------------+
  254.   ******************************************************************************
  255.   */
  256.  
  257. /* Includes ------------------------------------------------------------------*/
  258. #include "stm32l1xx_hal.h"
  259.  
  260. /** @addtogroup STM32L1xx_HAL_Driver
  261.   * @{
  262.   */
  263.  
  264. /** @defgroup UART UART
  265.   * @brief HAL UART module driver
  266.   * @{
  267.   */
  268. #ifdef HAL_UART_MODULE_ENABLED
  269.  
  270. /* Private typedef -----------------------------------------------------------*/
  271. /* Private define ------------------------------------------------------------*/
  272. /** @addtogroup UART_Private_Constants
  273.   * @{
  274.   */
  275. /**
  276.   * @}
  277.   */
  278. /* Private macro -------------------------------------------------------------*/
  279. /* Private variables ---------------------------------------------------------*/
  280. /* Private function prototypes -----------------------------------------------*/
  281. /** @addtogroup UART_Private_Functions  UART Private Functions
  282.   * @{
  283.   */
  284.  
  285. #if (USE_HAL_UART_REGISTER_CALLBACKS == 1)
  286. void UART_InitCallbacksToDefault(UART_HandleTypeDef *huart);
  287. #endif /* USE_HAL_UART_REGISTER_CALLBACKS */
  288. static void UART_EndTxTransfer(UART_HandleTypeDef *huart);
  289. static void UART_EndRxTransfer(UART_HandleTypeDef *huart);
  290. static void UART_DMATransmitCplt(DMA_HandleTypeDef *hdma);
  291. static void UART_DMAReceiveCplt(DMA_HandleTypeDef *hdma);
  292. static void UART_DMATxHalfCplt(DMA_HandleTypeDef *hdma);
  293. static void UART_DMARxHalfCplt(DMA_HandleTypeDef *hdma);
  294. static void UART_DMAError(DMA_HandleTypeDef *hdma);
  295. static void UART_DMAAbortOnError(DMA_HandleTypeDef *hdma);
  296. static void UART_DMATxAbortCallback(DMA_HandleTypeDef *hdma);
  297. static void UART_DMARxAbortCallback(DMA_HandleTypeDef *hdma);
  298. static void UART_DMATxOnlyAbortCallback(DMA_HandleTypeDef *hdma);
  299. static void UART_DMARxOnlyAbortCallback(DMA_HandleTypeDef *hdma);
  300. static HAL_StatusTypeDef UART_Transmit_IT(UART_HandleTypeDef *huart);
  301. static HAL_StatusTypeDef UART_EndTransmit_IT(UART_HandleTypeDef *huart);
  302. static HAL_StatusTypeDef UART_Receive_IT(UART_HandleTypeDef *huart);
  303. static HAL_StatusTypeDef UART_WaitOnFlagUntilTimeout(UART_HandleTypeDef *huart, uint32_t Flag, FlagStatus Status,
  304.                                                      uint32_t Tickstart, uint32_t Timeout);
  305. static void UART_SetConfig(UART_HandleTypeDef *huart);
  306.  
  307. /**
  308.   * @}
  309.   */
  310.  
  311. /* Exported functions ---------------------------------------------------------*/
  312. /** @defgroup UART_Exported_Functions UART Exported Functions
  313.   * @{
  314.   */
  315.  
  316. /** @defgroup UART_Exported_Functions_Group1 Initialization and de-initialization functions
  317.   *  @brief    Initialization and Configuration functions
  318.   *
  319. @verbatim
  320.  ===============================================================================
  321.             ##### Initialization and Configuration functions #####
  322.  ===============================================================================
  323.     [..]
  324.     This subsection provides a set of functions allowing to initialize the USARTx or the UARTy
  325.     in asynchronous mode.
  326.       (+) For the asynchronous mode only these parameters can be configured:
  327.         (++) Baud Rate
  328.         (++) Word Length
  329.         (++) Stop Bit
  330.         (++) Parity: If the parity is enabled, then the MSB bit of the data written
  331.              in the data register is transmitted but is changed by the parity bit.
  332.              Depending on the frame length defined by the M bit (8-bits or 9-bits),
  333.              please refer to Reference manual for possible UART frame formats.
  334.         (++) Hardware flow control
  335.         (++) Receiver/transmitter modes
  336.         (++) Over Sampling Method
  337.     [..]
  338.     The HAL_UART_Init(), HAL_HalfDuplex_Init(), HAL_LIN_Init() and HAL_MultiProcessor_Init() APIs
  339.     follow respectively the UART asynchronous, UART Half duplex, LIN and Multi-Processor configuration
  340.     procedures (details for the procedures are available in reference manual (RM0038)).
  341.  
  342. @endverbatim
  343.   * @{
  344.   */
  345.  
  346. /**
  347.   * @brief  Initializes the UART mode according to the specified parameters in
  348.   *         the UART_InitTypeDef and create the associated handle.
  349.   * @param  huart  Pointer to a UART_HandleTypeDef structure that contains
  350.   *                the configuration information for the specified UART module.
  351.   * @retval HAL status
  352.   */
  353. HAL_StatusTypeDef HAL_UART_Init(UART_HandleTypeDef *huart)
  354. {
  355.   /* Check the UART handle allocation */
  356.   if (huart == NULL)
  357.   {
  358.     return HAL_ERROR;
  359.   }
  360.  
  361.   /* Check the parameters */
  362.   if (huart->Init.HwFlowCtl != UART_HWCONTROL_NONE)
  363.   {
  364.     /* The hardware flow control is available only for USART1, USART2 and USART3 */
  365.     assert_param(IS_UART_HWFLOW_INSTANCE(huart->Instance));
  366.     assert_param(IS_UART_HARDWARE_FLOW_CONTROL(huart->Init.HwFlowCtl));
  367.   }
  368.   else
  369.   {
  370.     assert_param(IS_UART_INSTANCE(huart->Instance));
  371.   }
  372.   assert_param(IS_UART_WORD_LENGTH(huart->Init.WordLength));
  373.   assert_param(IS_UART_OVERSAMPLING(huart->Init.OverSampling));
  374.  
  375.   if (huart->gState == HAL_UART_STATE_RESET)
  376.   {
  377.     /* Allocate lock resource and initialize it */
  378.     huart->Lock = HAL_UNLOCKED;
  379.  
  380. #if (USE_HAL_UART_REGISTER_CALLBACKS == 1)
  381.     UART_InitCallbacksToDefault(huart);
  382.  
  383.     if (huart->MspInitCallback == NULL)
  384.     {
  385.       huart->MspInitCallback = HAL_UART_MspInit;
  386.     }
  387.  
  388.     /* Init the low level hardware */
  389.     huart->MspInitCallback(huart);
  390. #else
  391.     /* Init the low level hardware : GPIO, CLOCK */
  392.     HAL_UART_MspInit(huart);
  393. #endif /* (USE_HAL_UART_REGISTER_CALLBACKS) */
  394.   }
  395.  
  396.   huart->gState = HAL_UART_STATE_BUSY;
  397.  
  398.   /* Disable the peripheral */
  399.   __HAL_UART_DISABLE(huart);
  400.  
  401.   /* Set the UART Communication parameters */
  402.   UART_SetConfig(huart);
  403.  
  404.   /* In asynchronous mode, the following bits must be kept cleared:
  405.      - LINEN and CLKEN bits in the USART_CR2 register,
  406.      - SCEN, HDSEL and IREN  bits in the USART_CR3 register.*/
  407.   CLEAR_BIT(huart->Instance->CR2, (USART_CR2_LINEN | USART_CR2_CLKEN));
  408.   CLEAR_BIT(huart->Instance->CR3, (USART_CR3_SCEN | USART_CR3_HDSEL | USART_CR3_IREN));
  409.  
  410.   /* Enable the peripheral */
  411.   __HAL_UART_ENABLE(huart);
  412.  
  413.   /* Initialize the UART state */
  414.   huart->ErrorCode = HAL_UART_ERROR_NONE;
  415.   huart->gState = HAL_UART_STATE_READY;
  416.   huart->RxState = HAL_UART_STATE_READY;
  417.   huart->RxEventType = HAL_UART_RXEVENT_TC;
  418.  
  419.   return HAL_OK;
  420. }
  421.  
  422. /**
  423.   * @brief  Initializes the half-duplex mode according to the specified
  424.   *         parameters in the UART_InitTypeDef and create the associated handle.
  425.   * @param  huart  Pointer to a UART_HandleTypeDef structure that contains
  426.   *                the configuration information for the specified UART module.
  427.   * @retval HAL status
  428.   */
  429. HAL_StatusTypeDef HAL_HalfDuplex_Init(UART_HandleTypeDef *huart)
  430. {
  431.   /* Check the UART handle allocation */
  432.   if (huart == NULL)
  433.   {
  434.     return HAL_ERROR;
  435.   }
  436.  
  437.   /* Check the parameters */
  438.   assert_param(IS_UART_HALFDUPLEX_INSTANCE(huart->Instance));
  439.   assert_param(IS_UART_WORD_LENGTH(huart->Init.WordLength));
  440.   assert_param(IS_UART_OVERSAMPLING(huart->Init.OverSampling));
  441.  
  442.   if (huart->gState == HAL_UART_STATE_RESET)
  443.   {
  444.     /* Allocate lock resource and initialize it */
  445.     huart->Lock = HAL_UNLOCKED;
  446.  
  447. #if (USE_HAL_UART_REGISTER_CALLBACKS == 1)
  448.     UART_InitCallbacksToDefault(huart);
  449.  
  450.     if (huart->MspInitCallback == NULL)
  451.     {
  452.       huart->MspInitCallback = HAL_UART_MspInit;
  453.     }
  454.  
  455.     /* Init the low level hardware */
  456.     huart->MspInitCallback(huart);
  457. #else
  458.     /* Init the low level hardware : GPIO, CLOCK */
  459.     HAL_UART_MspInit(huart);
  460. #endif /* (USE_HAL_UART_REGISTER_CALLBACKS) */
  461.   }
  462.  
  463.   huart->gState = HAL_UART_STATE_BUSY;
  464.  
  465.   /* Disable the peripheral */
  466.   __HAL_UART_DISABLE(huart);
  467.  
  468.   /* Set the UART Communication parameters */
  469.   UART_SetConfig(huart);
  470.  
  471.   /* In half-duplex mode, the following bits must be kept cleared:
  472.      - LINEN and CLKEN bits in the USART_CR2 register,
  473.      - SCEN and IREN bits in the USART_CR3 register.*/
  474.   CLEAR_BIT(huart->Instance->CR2, (USART_CR2_LINEN | USART_CR2_CLKEN));
  475.   CLEAR_BIT(huart->Instance->CR3, (USART_CR3_IREN | USART_CR3_SCEN));
  476.  
  477.   /* Enable the Half-Duplex mode by setting the HDSEL bit in the CR3 register */
  478.   SET_BIT(huart->Instance->CR3, USART_CR3_HDSEL);
  479.  
  480.   /* Enable the peripheral */
  481.   __HAL_UART_ENABLE(huart);
  482.  
  483.   /* Initialize the UART state*/
  484.   huart->ErrorCode = HAL_UART_ERROR_NONE;
  485.   huart->gState = HAL_UART_STATE_READY;
  486.   huart->RxState = HAL_UART_STATE_READY;
  487.   huart->RxEventType = HAL_UART_RXEVENT_TC;
  488.  
  489.   return HAL_OK;
  490. }
  491.  
  492. /**
  493.   * @brief  Initializes the LIN mode according to the specified
  494.   *         parameters in the UART_InitTypeDef and create the associated handle.
  495.   * @param  huart  Pointer to a UART_HandleTypeDef structure that contains
  496.   *                the configuration information for the specified UART module.
  497.   * @param  BreakDetectLength Specifies the LIN break detection length.
  498.   *         This parameter can be one of the following values:
  499.   *            @arg UART_LINBREAKDETECTLENGTH_10B: 10-bit break detection
  500.   *            @arg UART_LINBREAKDETECTLENGTH_11B: 11-bit break detection
  501.   * @retval HAL status
  502.   */
  503. HAL_StatusTypeDef HAL_LIN_Init(UART_HandleTypeDef *huart, uint32_t BreakDetectLength)
  504. {
  505.   /* Check the UART handle allocation */
  506.   if (huart == NULL)
  507.   {
  508.     return HAL_ERROR;
  509.   }
  510.  
  511.   /* Check the LIN UART instance */
  512.   assert_param(IS_UART_LIN_INSTANCE(huart->Instance));
  513.  
  514.   /* Check the Break detection length parameter */
  515.   assert_param(IS_UART_LIN_BREAK_DETECT_LENGTH(BreakDetectLength));
  516.   assert_param(IS_UART_LIN_WORD_LENGTH(huart->Init.WordLength));
  517.   assert_param(IS_UART_LIN_OVERSAMPLING(huart->Init.OverSampling));
  518.  
  519.   if (huart->gState == HAL_UART_STATE_RESET)
  520.   {
  521.     /* Allocate lock resource and initialize it */
  522.     huart->Lock = HAL_UNLOCKED;
  523.  
  524. #if (USE_HAL_UART_REGISTER_CALLBACKS == 1)
  525.     UART_InitCallbacksToDefault(huart);
  526.  
  527.     if (huart->MspInitCallback == NULL)
  528.     {
  529.       huart->MspInitCallback = HAL_UART_MspInit;
  530.     }
  531.  
  532.     /* Init the low level hardware */
  533.     huart->MspInitCallback(huart);
  534. #else
  535.     /* Init the low level hardware : GPIO, CLOCK */
  536.     HAL_UART_MspInit(huart);
  537. #endif /* (USE_HAL_UART_REGISTER_CALLBACKS) */
  538.   }
  539.  
  540.   huart->gState = HAL_UART_STATE_BUSY;
  541.  
  542.   /* Disable the peripheral */
  543.   __HAL_UART_DISABLE(huart);
  544.  
  545.   /* Set the UART Communication parameters */
  546.   UART_SetConfig(huart);
  547.  
  548.   /* In LIN mode, the following bits must be kept cleared:
  549.      - CLKEN bits in the USART_CR2 register,
  550.      - SCEN, HDSEL and IREN bits in the USART_CR3 register.*/
  551.   CLEAR_BIT(huart->Instance->CR2, (USART_CR2_CLKEN));
  552.   CLEAR_BIT(huart->Instance->CR3, (USART_CR3_HDSEL | USART_CR3_IREN | USART_CR3_SCEN));
  553.  
  554.   /* Enable the LIN mode by setting the LINEN bit in the CR2 register */
  555.   SET_BIT(huart->Instance->CR2, USART_CR2_LINEN);
  556.  
  557.   /* Set the USART LIN Break detection length. */
  558.   CLEAR_BIT(huart->Instance->CR2, USART_CR2_LBDL);
  559.   SET_BIT(huart->Instance->CR2, BreakDetectLength);
  560.  
  561.   /* Enable the peripheral */
  562.   __HAL_UART_ENABLE(huart);
  563.  
  564.   /* Initialize the UART state*/
  565.   huart->ErrorCode = HAL_UART_ERROR_NONE;
  566.   huart->gState = HAL_UART_STATE_READY;
  567.   huart->RxState = HAL_UART_STATE_READY;
  568.   huart->RxEventType = HAL_UART_RXEVENT_TC;
  569.  
  570.   return HAL_OK;
  571. }
  572.  
  573. /**
  574.   * @brief  Initializes the Multi-Processor mode according to the specified
  575.   *         parameters in the UART_InitTypeDef and create the associated handle.
  576.   * @param  huart  Pointer to a UART_HandleTypeDef structure that contains
  577.   *                the configuration information for the specified UART module.
  578.   * @param  Address USART address
  579.   * @param  WakeUpMethod specifies the USART wake-up method.
  580.   *         This parameter can be one of the following values:
  581.   *            @arg UART_WAKEUPMETHOD_IDLELINE: Wake-up by an idle line detection
  582.   *            @arg UART_WAKEUPMETHOD_ADDRESSMARK: Wake-up by an address mark
  583.   * @retval HAL status
  584.   */
  585. HAL_StatusTypeDef HAL_MultiProcessor_Init(UART_HandleTypeDef *huart, uint8_t Address, uint32_t WakeUpMethod)
  586. {
  587.   /* Check the UART handle allocation */
  588.   if (huart == NULL)
  589.   {
  590.     return HAL_ERROR;
  591.   }
  592.  
  593.   /* Check the parameters */
  594.   assert_param(IS_UART_MULTIPROCESSOR_INSTANCE(huart->Instance));
  595.  
  596.   /* Check the Address & wake up method parameters */
  597.   assert_param(IS_UART_WAKEUPMETHOD(WakeUpMethod));
  598.   assert_param(IS_UART_ADDRESS(Address));
  599.   assert_param(IS_UART_WORD_LENGTH(huart->Init.WordLength));
  600.   assert_param(IS_UART_OVERSAMPLING(huart->Init.OverSampling));
  601.  
  602.   if (huart->gState == HAL_UART_STATE_RESET)
  603.   {
  604.     /* Allocate lock resource and initialize it */
  605.     huart->Lock = HAL_UNLOCKED;
  606.  
  607. #if (USE_HAL_UART_REGISTER_CALLBACKS == 1)
  608.     UART_InitCallbacksToDefault(huart);
  609.  
  610.     if (huart->MspInitCallback == NULL)
  611.     {
  612.       huart->MspInitCallback = HAL_UART_MspInit;
  613.     }
  614.  
  615.     /* Init the low level hardware */
  616.     huart->MspInitCallback(huart);
  617. #else
  618.     /* Init the low level hardware : GPIO, CLOCK */
  619.     HAL_UART_MspInit(huart);
  620. #endif /* (USE_HAL_UART_REGISTER_CALLBACKS) */
  621.   }
  622.  
  623.   huart->gState = HAL_UART_STATE_BUSY;
  624.  
  625.   /* Disable the peripheral */
  626.   __HAL_UART_DISABLE(huart);
  627.  
  628.   /* Set the UART Communication parameters */
  629.   UART_SetConfig(huart);
  630.  
  631.   /* In Multi-Processor mode, the following bits must be kept cleared:
  632.      - LINEN and CLKEN bits in the USART_CR2 register,
  633.      - SCEN, HDSEL and IREN  bits in the USART_CR3 register */
  634.   CLEAR_BIT(huart->Instance->CR2, (USART_CR2_LINEN | USART_CR2_CLKEN));
  635.   CLEAR_BIT(huart->Instance->CR3, (USART_CR3_SCEN | USART_CR3_HDSEL | USART_CR3_IREN));
  636.  
  637.   /* Set the USART address node */
  638.   CLEAR_BIT(huart->Instance->CR2, USART_CR2_ADD);
  639.   SET_BIT(huart->Instance->CR2, Address);
  640.  
  641.   /* Set the wake up method by setting the WAKE bit in the CR1 register */
  642.   CLEAR_BIT(huart->Instance->CR1, USART_CR1_WAKE);
  643.   SET_BIT(huart->Instance->CR1, WakeUpMethod);
  644.  
  645.   /* Enable the peripheral */
  646.   __HAL_UART_ENABLE(huart);
  647.  
  648.   /* Initialize the UART state */
  649.   huart->ErrorCode = HAL_UART_ERROR_NONE;
  650.   huart->gState = HAL_UART_STATE_READY;
  651.   huart->RxState = HAL_UART_STATE_READY;
  652.   huart->RxEventType = HAL_UART_RXEVENT_TC;
  653.  
  654.   return HAL_OK;
  655. }
  656.  
  657. /**
  658.   * @brief  DeInitializes the UART peripheral.
  659.   * @param  huart  Pointer to a UART_HandleTypeDef structure that contains
  660.   *                the configuration information for the specified UART module.
  661.   * @retval HAL status
  662.   */
  663. HAL_StatusTypeDef HAL_UART_DeInit(UART_HandleTypeDef *huart)
  664. {
  665.   /* Check the UART handle allocation */
  666.   if (huart == NULL)
  667.   {
  668.     return HAL_ERROR;
  669.   }
  670.  
  671.   /* Check the parameters */
  672.   assert_param(IS_UART_INSTANCE(huart->Instance));
  673.  
  674.   huart->gState = HAL_UART_STATE_BUSY;
  675.  
  676.   /* Disable the Peripheral */
  677.   __HAL_UART_DISABLE(huart);
  678.  
  679. #if (USE_HAL_UART_REGISTER_CALLBACKS == 1)
  680.   if (huart->MspDeInitCallback == NULL)
  681.   {
  682.     huart->MspDeInitCallback = HAL_UART_MspDeInit;
  683.   }
  684.   /* DeInit the low level hardware */
  685.   huart->MspDeInitCallback(huart);
  686. #else
  687.   /* DeInit the low level hardware */
  688.   HAL_UART_MspDeInit(huart);
  689. #endif /* (USE_HAL_UART_REGISTER_CALLBACKS) */
  690.  
  691.   huart->ErrorCode = HAL_UART_ERROR_NONE;
  692.   huart->gState = HAL_UART_STATE_RESET;
  693.   huart->RxState = HAL_UART_STATE_RESET;
  694.   huart->ReceptionType = HAL_UART_RECEPTION_STANDARD;
  695.   huart->RxEventType = HAL_UART_RXEVENT_TC;
  696.  
  697.   /* Process Unlock */
  698.   __HAL_UNLOCK(huart);
  699.  
  700.   return HAL_OK;
  701. }
  702.  
  703. /**
  704.   * @brief  UART MSP Init.
  705.   * @param  huart  Pointer to a UART_HandleTypeDef structure that contains
  706.   *                the configuration information for the specified UART module.
  707.   * @retval None
  708.   */
  709. __weak void HAL_UART_MspInit(UART_HandleTypeDef *huart)
  710. {
  711.   /* Prevent unused argument(s) compilation warning */
  712.   UNUSED(huart);
  713.   /* NOTE: This function should not be modified, when the callback is needed,
  714.            the HAL_UART_MspInit could be implemented in the user file
  715.    */
  716. }
  717.  
  718. /**
  719.   * @brief  UART MSP DeInit.
  720.   * @param  huart  Pointer to a UART_HandleTypeDef structure that contains
  721.   *                the configuration information for the specified UART module.
  722.   * @retval None
  723.   */
  724. __weak void HAL_UART_MspDeInit(UART_HandleTypeDef *huart)
  725. {
  726.   /* Prevent unused argument(s) compilation warning */
  727.   UNUSED(huart);
  728.   /* NOTE: This function should not be modified, when the callback is needed,
  729.            the HAL_UART_MspDeInit could be implemented in the user file
  730.    */
  731. }
  732.  
  733. #if (USE_HAL_UART_REGISTER_CALLBACKS == 1)
  734. /**
  735.   * @brief  Register a User UART Callback
  736.   *         To be used instead of the weak predefined callback
  737.   * @note   The HAL_UART_RegisterCallback() may be called before HAL_UART_Init(), HAL_HalfDuplex_Init(), HAL_LIN_Init(),
  738.   *         HAL_MultiProcessor_Init() to register callbacks for HAL_UART_MSPINIT_CB_ID and HAL_UART_MSPDEINIT_CB_ID
  739.   * @param  huart uart handle
  740.   * @param  CallbackID ID of the callback to be registered
  741.   *         This parameter can be one of the following values:
  742.   *           @arg @ref HAL_UART_TX_HALFCOMPLETE_CB_ID Tx Half Complete Callback ID
  743.   *           @arg @ref HAL_UART_TX_COMPLETE_CB_ID Tx Complete Callback ID
  744.   *           @arg @ref HAL_UART_RX_HALFCOMPLETE_CB_ID Rx Half Complete Callback ID
  745.   *           @arg @ref HAL_UART_RX_COMPLETE_CB_ID Rx Complete Callback ID
  746.   *           @arg @ref HAL_UART_ERROR_CB_ID Error Callback ID
  747.   *           @arg @ref HAL_UART_ABORT_COMPLETE_CB_ID Abort Complete Callback ID
  748.   *           @arg @ref HAL_UART_ABORT_TRANSMIT_COMPLETE_CB_ID Abort Transmit Complete Callback ID
  749.   *           @arg @ref HAL_UART_ABORT_RECEIVE_COMPLETE_CB_ID Abort Receive Complete Callback ID
  750.   *           @arg @ref HAL_UART_MSPINIT_CB_ID MspInit Callback ID
  751.   *           @arg @ref HAL_UART_MSPDEINIT_CB_ID MspDeInit Callback ID
  752.   * @param  pCallback pointer to the Callback function
  753.   * @retval HAL status
  754.   */
  755. HAL_StatusTypeDef HAL_UART_RegisterCallback(UART_HandleTypeDef *huart, HAL_UART_CallbackIDTypeDef CallbackID,
  756.                                             pUART_CallbackTypeDef pCallback)
  757. {
  758.   HAL_StatusTypeDef status = HAL_OK;
  759.  
  760.   if (pCallback == NULL)
  761.   {
  762.     /* Update the error code */
  763.     huart->ErrorCode |= HAL_UART_ERROR_INVALID_CALLBACK;
  764.  
  765.     return HAL_ERROR;
  766.   }
  767.  
  768.   if (huart->gState == HAL_UART_STATE_READY)
  769.   {
  770.     switch (CallbackID)
  771.     {
  772.       case HAL_UART_TX_HALFCOMPLETE_CB_ID :
  773.         huart->TxHalfCpltCallback = pCallback;
  774.         break;
  775.  
  776.       case HAL_UART_TX_COMPLETE_CB_ID :
  777.         huart->TxCpltCallback = pCallback;
  778.         break;
  779.  
  780.       case HAL_UART_RX_HALFCOMPLETE_CB_ID :
  781.         huart->RxHalfCpltCallback = pCallback;
  782.         break;
  783.  
  784.       case HAL_UART_RX_COMPLETE_CB_ID :
  785.         huart->RxCpltCallback = pCallback;
  786.         break;
  787.  
  788.       case HAL_UART_ERROR_CB_ID :
  789.         huart->ErrorCallback = pCallback;
  790.         break;
  791.  
  792.       case HAL_UART_ABORT_COMPLETE_CB_ID :
  793.         huart->AbortCpltCallback = pCallback;
  794.         break;
  795.  
  796.       case HAL_UART_ABORT_TRANSMIT_COMPLETE_CB_ID :
  797.         huart->AbortTransmitCpltCallback = pCallback;
  798.         break;
  799.  
  800.       case HAL_UART_ABORT_RECEIVE_COMPLETE_CB_ID :
  801.         huart->AbortReceiveCpltCallback = pCallback;
  802.         break;
  803.  
  804.       case HAL_UART_MSPINIT_CB_ID :
  805.         huart->MspInitCallback = pCallback;
  806.         break;
  807.  
  808.       case HAL_UART_MSPDEINIT_CB_ID :
  809.         huart->MspDeInitCallback = pCallback;
  810.         break;
  811.  
  812.       default :
  813.         /* Update the error code */
  814.         huart->ErrorCode |= HAL_UART_ERROR_INVALID_CALLBACK;
  815.  
  816.         /* Return error status */
  817.         status =  HAL_ERROR;
  818.         break;
  819.     }
  820.   }
  821.   else if (huart->gState == HAL_UART_STATE_RESET)
  822.   {
  823.     switch (CallbackID)
  824.     {
  825.       case HAL_UART_MSPINIT_CB_ID :
  826.         huart->MspInitCallback = pCallback;
  827.         break;
  828.  
  829.       case HAL_UART_MSPDEINIT_CB_ID :
  830.         huart->MspDeInitCallback = pCallback;
  831.         break;
  832.  
  833.       default :
  834.         /* Update the error code */
  835.         huart->ErrorCode |= HAL_UART_ERROR_INVALID_CALLBACK;
  836.  
  837.         /* Return error status */
  838.         status =  HAL_ERROR;
  839.         break;
  840.     }
  841.   }
  842.   else
  843.   {
  844.     /* Update the error code */
  845.     huart->ErrorCode |= HAL_UART_ERROR_INVALID_CALLBACK;
  846.  
  847.     /* Return error status */
  848.     status =  HAL_ERROR;
  849.   }
  850.  
  851.   return status;
  852. }
  853.  
  854. /**
  855.   * @brief  Unregister an UART Callback
  856.   *         UART callaback is redirected to the weak predefined callback
  857.   * @note   The HAL_UART_UnRegisterCallback() may be called before HAL_UART_Init(), HAL_HalfDuplex_Init(),
  858.   *         HAL_LIN_Init(), HAL_MultiProcessor_Init() to un-register callbacks for HAL_UART_MSPINIT_CB_ID
  859.   *         and HAL_UART_MSPDEINIT_CB_ID
  860.   * @param  huart uart handle
  861.   * @param  CallbackID ID of the callback to be unregistered
  862.   *         This parameter can be one of the following values:
  863.   *           @arg @ref HAL_UART_TX_HALFCOMPLETE_CB_ID Tx Half Complete Callback ID
  864.   *           @arg @ref HAL_UART_TX_COMPLETE_CB_ID Tx Complete Callback ID
  865.   *           @arg @ref HAL_UART_RX_HALFCOMPLETE_CB_ID Rx Half Complete Callback ID
  866.   *           @arg @ref HAL_UART_RX_COMPLETE_CB_ID Rx Complete Callback ID
  867.   *           @arg @ref HAL_UART_ERROR_CB_ID Error Callback ID
  868.   *           @arg @ref HAL_UART_ABORT_COMPLETE_CB_ID Abort Complete Callback ID
  869.   *           @arg @ref HAL_UART_ABORT_TRANSMIT_COMPLETE_CB_ID Abort Transmit Complete Callback ID
  870.   *           @arg @ref HAL_UART_ABORT_RECEIVE_COMPLETE_CB_ID Abort Receive Complete Callback ID
  871.   *           @arg @ref HAL_UART_MSPINIT_CB_ID MspInit Callback ID
  872.   *           @arg @ref HAL_UART_MSPDEINIT_CB_ID MspDeInit Callback ID
  873.   * @retval HAL status
  874.   */
  875. HAL_StatusTypeDef HAL_UART_UnRegisterCallback(UART_HandleTypeDef *huart, HAL_UART_CallbackIDTypeDef CallbackID)
  876. {
  877.   HAL_StatusTypeDef status = HAL_OK;
  878.  
  879.   if (HAL_UART_STATE_READY == huart->gState)
  880.   {
  881.     switch (CallbackID)
  882.     {
  883.       case HAL_UART_TX_HALFCOMPLETE_CB_ID :
  884.         huart->TxHalfCpltCallback = HAL_UART_TxHalfCpltCallback;               /* Legacy weak  TxHalfCpltCallback       */
  885.         break;
  886.  
  887.       case HAL_UART_TX_COMPLETE_CB_ID :
  888.         huart->TxCpltCallback = HAL_UART_TxCpltCallback;                       /* Legacy weak TxCpltCallback            */
  889.         break;
  890.  
  891.       case HAL_UART_RX_HALFCOMPLETE_CB_ID :
  892.         huart->RxHalfCpltCallback = HAL_UART_RxHalfCpltCallback;               /* Legacy weak RxHalfCpltCallback        */
  893.         break;
  894.  
  895.       case HAL_UART_RX_COMPLETE_CB_ID :
  896.         huart->RxCpltCallback = HAL_UART_RxCpltCallback;                       /* Legacy weak RxCpltCallback            */
  897.         break;
  898.  
  899.       case HAL_UART_ERROR_CB_ID :
  900.         huart->ErrorCallback = HAL_UART_ErrorCallback;                         /* Legacy weak ErrorCallback             */
  901.         break;
  902.  
  903.       case HAL_UART_ABORT_COMPLETE_CB_ID :
  904.         huart->AbortCpltCallback = HAL_UART_AbortCpltCallback;                 /* Legacy weak AbortCpltCallback         */
  905.         break;
  906.  
  907.       case HAL_UART_ABORT_TRANSMIT_COMPLETE_CB_ID :
  908.         huart->AbortTransmitCpltCallback = HAL_UART_AbortTransmitCpltCallback; /* Legacy weak AbortTransmitCpltCallback */
  909.         break;
  910.  
  911.       case HAL_UART_ABORT_RECEIVE_COMPLETE_CB_ID :
  912.         huart->AbortReceiveCpltCallback = HAL_UART_AbortReceiveCpltCallback;   /* Legacy weak AbortReceiveCpltCallback  */
  913.         break;
  914.  
  915.       case HAL_UART_MSPINIT_CB_ID :
  916.         huart->MspInitCallback = HAL_UART_MspInit;                             /* Legacy weak MspInitCallback           */
  917.         break;
  918.  
  919.       case HAL_UART_MSPDEINIT_CB_ID :
  920.         huart->MspDeInitCallback = HAL_UART_MspDeInit;                         /* Legacy weak MspDeInitCallback         */
  921.         break;
  922.  
  923.       default :
  924.         /* Update the error code */
  925.         huart->ErrorCode |= HAL_UART_ERROR_INVALID_CALLBACK;
  926.  
  927.         /* Return error status */
  928.         status =  HAL_ERROR;
  929.         break;
  930.     }
  931.   }
  932.   else if (HAL_UART_STATE_RESET == huart->gState)
  933.   {
  934.     switch (CallbackID)
  935.     {
  936.       case HAL_UART_MSPINIT_CB_ID :
  937.         huart->MspInitCallback = HAL_UART_MspInit;
  938.         break;
  939.  
  940.       case HAL_UART_MSPDEINIT_CB_ID :
  941.         huart->MspDeInitCallback = HAL_UART_MspDeInit;
  942.         break;
  943.  
  944.       default :
  945.         /* Update the error code */
  946.         huart->ErrorCode |= HAL_UART_ERROR_INVALID_CALLBACK;
  947.  
  948.         /* Return error status */
  949.         status =  HAL_ERROR;
  950.         break;
  951.     }
  952.   }
  953.   else
  954.   {
  955.     /* Update the error code */
  956.     huart->ErrorCode |= HAL_UART_ERROR_INVALID_CALLBACK;
  957.  
  958.     /* Return error status */
  959.     status =  HAL_ERROR;
  960.   }
  961.  
  962.   return status;
  963. }
  964.  
  965. /**
  966.   * @brief  Register a User UART Rx Event Callback
  967.   *         To be used instead of the weak predefined callback
  968.   * @param  huart     Uart handle
  969.   * @param  pCallback Pointer to the Rx Event Callback function
  970.   * @retval HAL status
  971.   */
  972. HAL_StatusTypeDef HAL_UART_RegisterRxEventCallback(UART_HandleTypeDef *huart, pUART_RxEventCallbackTypeDef pCallback)
  973. {
  974.   HAL_StatusTypeDef status = HAL_OK;
  975.  
  976.   if (pCallback == NULL)
  977.   {
  978.     huart->ErrorCode |= HAL_UART_ERROR_INVALID_CALLBACK;
  979.  
  980.     return HAL_ERROR;
  981.   }
  982.  
  983.   /* Process locked */
  984.   __HAL_LOCK(huart);
  985.  
  986.   if (huart->gState == HAL_UART_STATE_READY)
  987.   {
  988.     huart->RxEventCallback = pCallback;
  989.   }
  990.   else
  991.   {
  992.     huart->ErrorCode |= HAL_UART_ERROR_INVALID_CALLBACK;
  993.  
  994.     status =  HAL_ERROR;
  995.   }
  996.  
  997.   /* Release Lock */
  998.   __HAL_UNLOCK(huart);
  999.  
  1000.   return status;
  1001. }
  1002.  
  1003. /**
  1004.   * @brief  UnRegister the UART Rx Event Callback
  1005.   *         UART Rx Event Callback is redirected to the weak HAL_UARTEx_RxEventCallback() predefined callback
  1006.   * @param  huart     Uart handle
  1007.   * @retval HAL status
  1008.   */
  1009. HAL_StatusTypeDef HAL_UART_UnRegisterRxEventCallback(UART_HandleTypeDef *huart)
  1010. {
  1011.   HAL_StatusTypeDef status = HAL_OK;
  1012.  
  1013.   /* Process locked */
  1014.   __HAL_LOCK(huart);
  1015.  
  1016.   if (huart->gState == HAL_UART_STATE_READY)
  1017.   {
  1018.     huart->RxEventCallback = HAL_UARTEx_RxEventCallback; /* Legacy weak UART Rx Event Callback  */
  1019.   }
  1020.   else
  1021.   {
  1022.     huart->ErrorCode |= HAL_UART_ERROR_INVALID_CALLBACK;
  1023.  
  1024.     status =  HAL_ERROR;
  1025.   }
  1026.  
  1027.   /* Release Lock */
  1028.   __HAL_UNLOCK(huart);
  1029.   return status;
  1030. }
  1031. #endif /* USE_HAL_UART_REGISTER_CALLBACKS */
  1032.  
  1033. /**
  1034.   * @}
  1035.   */
  1036.  
  1037. /** @defgroup UART_Exported_Functions_Group2 IO operation functions
  1038.   *  @brief UART Transmit and Receive functions
  1039.   *
  1040. @verbatim
  1041.  ===============================================================================
  1042.                       ##### IO operation functions #####
  1043.  ===============================================================================
  1044.     This subsection provides a set of functions allowing to manage the UART asynchronous
  1045.     and Half duplex data transfers.
  1046.  
  1047.     (#) There are two modes of transfer:
  1048.        (+) Blocking mode: The communication is performed in polling mode.
  1049.            The HAL status of all data processing is returned by the same function
  1050.            after finishing transfer.
  1051.        (+) Non-Blocking mode: The communication is performed using Interrupts
  1052.            or DMA, these API's return the HAL status.
  1053.            The end of the data processing will be indicated through the
  1054.            dedicated UART IRQ when using Interrupt mode or the DMA IRQ when
  1055.            using DMA mode.
  1056.            The HAL_UART_TxCpltCallback(), HAL_UART_RxCpltCallback() user callbacks
  1057.            will be executed respectively at the end of the transmit or receive process
  1058.            The HAL_UART_ErrorCallback()user callback will be executed when a communication error is detected.
  1059.  
  1060.     (#) Blocking mode API's are :
  1061.         (+) HAL_UART_Transmit()
  1062.         (+) HAL_UART_Receive()
  1063.  
  1064.     (#) Non-Blocking mode API's with Interrupt are :
  1065.         (+) HAL_UART_Transmit_IT()
  1066.         (+) HAL_UART_Receive_IT()
  1067.         (+) HAL_UART_IRQHandler()
  1068.  
  1069.     (#) Non-Blocking mode API's with DMA are :
  1070.         (+) HAL_UART_Transmit_DMA()
  1071.         (+) HAL_UART_Receive_DMA()
  1072.         (+) HAL_UART_DMAPause()
  1073.         (+) HAL_UART_DMAResume()
  1074.         (+) HAL_UART_DMAStop()
  1075.  
  1076.     (#) A set of Transfer Complete Callbacks are provided in Non_Blocking mode:
  1077.         (+) HAL_UART_TxHalfCpltCallback()
  1078.         (+) HAL_UART_TxCpltCallback()
  1079.         (+) HAL_UART_RxHalfCpltCallback()
  1080.         (+) HAL_UART_RxCpltCallback()
  1081.         (+) HAL_UART_ErrorCallback()
  1082.  
  1083.     (#) Non-Blocking mode transfers could be aborted using Abort API's :
  1084.         (+) HAL_UART_Abort()
  1085.         (+) HAL_UART_AbortTransmit()
  1086.         (+) HAL_UART_AbortReceive()
  1087.         (+) HAL_UART_Abort_IT()
  1088.         (+) HAL_UART_AbortTransmit_IT()
  1089.         (+) HAL_UART_AbortReceive_IT()
  1090.  
  1091.     (#) For Abort services based on interrupts (HAL_UART_Abortxxx_IT), a set of Abort Complete Callbacks are provided:
  1092.         (+) HAL_UART_AbortCpltCallback()
  1093.         (+) HAL_UART_AbortTransmitCpltCallback()
  1094.         (+) HAL_UART_AbortReceiveCpltCallback()
  1095.  
  1096.     (#) A Rx Event Reception Callback (Rx event notification) is available for Non_Blocking modes of enhanced reception services:
  1097.         (+) HAL_UARTEx_RxEventCallback()
  1098.  
  1099.     (#) In Non-Blocking mode transfers, possible errors are split into 2 categories.
  1100.         Errors are handled as follows :
  1101.        (+) Error is considered as Recoverable and non blocking : Transfer could go till end, but error severity is
  1102.            to be evaluated by user : this concerns Frame Error, Parity Error or Noise Error in Interrupt mode reception .
  1103.            Received character is then retrieved and stored in Rx buffer, Error code is set to allow user to identify error type,
  1104.            and HAL_UART_ErrorCallback() user callback is executed. Transfer is kept ongoing on UART side.
  1105.            If user wants to abort it, Abort services should be called by user.
  1106.        (+) Error is considered as Blocking : Transfer could not be completed properly and is aborted.
  1107.            This concerns Overrun Error In Interrupt mode reception and all errors in DMA mode.
  1108.            Error code is set to allow user to identify error type, and HAL_UART_ErrorCallback() user callback is executed.
  1109.  
  1110.     -@- In the Half duplex communication, it is forbidden to run the transmit
  1111.         and receive process in parallel, the UART state HAL_UART_STATE_BUSY_TX_RX can't be useful.
  1112.  
  1113. @endverbatim
  1114.   * @{
  1115.   */
  1116.  
  1117. /**
  1118.   * @brief  Sends an amount of data in blocking mode.
  1119.   * @note   When UART parity is not enabled (PCE = 0), and Word Length is configured to 9 bits (M1-M0 = 01),
  1120.   *         the sent data is handled as a set of u16. In this case, Size must indicate the number
  1121.   *         of u16 provided through pData.
  1122.   * @param  huart Pointer to a UART_HandleTypeDef structure that contains
  1123.   *               the configuration information for the specified UART module.
  1124.   * @param  pData Pointer to data buffer (u8 or u16 data elements).
  1125.   * @param  Size  Amount of data elements (u8 or u16) to be sent
  1126.   * @param  Timeout Timeout duration
  1127.   * @retval HAL status
  1128.   */
  1129. HAL_StatusTypeDef HAL_UART_Transmit(UART_HandleTypeDef *huart, const uint8_t *pData, uint16_t Size, uint32_t Timeout)
  1130. {
  1131.   const uint8_t  *pdata8bits;
  1132.   const uint16_t *pdata16bits;
  1133.   uint32_t tickstart = 0U;
  1134.  
  1135.   /* Check that a Tx process is not already ongoing */
  1136.   if (huart->gState == HAL_UART_STATE_READY)
  1137.   {
  1138.     if ((pData == NULL) || (Size == 0U))
  1139.     {
  1140.       return  HAL_ERROR;
  1141.     }
  1142.  
  1143.     huart->ErrorCode = HAL_UART_ERROR_NONE;
  1144.     huart->gState = HAL_UART_STATE_BUSY_TX;
  1145.  
  1146.     /* Init tickstart for timeout management */
  1147.     tickstart = HAL_GetTick();
  1148.  
  1149.     huart->TxXferSize = Size;
  1150.     huart->TxXferCount = Size;
  1151.  
  1152.     /* In case of 9bits/No Parity transfer, pData needs to be handled as a uint16_t pointer */
  1153.     if ((huart->Init.WordLength == UART_WORDLENGTH_9B) && (huart->Init.Parity == UART_PARITY_NONE))
  1154.     {
  1155.       pdata8bits  = NULL;
  1156.       pdata16bits = (const uint16_t *) pData;
  1157.     }
  1158.     else
  1159.     {
  1160.       pdata8bits  = pData;
  1161.       pdata16bits = NULL;
  1162.     }
  1163.  
  1164.     while (huart->TxXferCount > 0U)
  1165.     {
  1166.       if (UART_WaitOnFlagUntilTimeout(huart, UART_FLAG_TXE, RESET, tickstart, Timeout) != HAL_OK)
  1167.       {
  1168.         return HAL_TIMEOUT;
  1169.       }
  1170.       if (pdata8bits == NULL)
  1171.       {
  1172.         huart->Instance->DR = (uint16_t)(*pdata16bits & 0x01FFU);
  1173.         pdata16bits++;
  1174.       }
  1175.       else
  1176.       {
  1177.         huart->Instance->DR = (uint8_t)(*pdata8bits & 0xFFU);
  1178.         pdata8bits++;
  1179.       }
  1180.       huart->TxXferCount--;
  1181.     }
  1182.  
  1183.     if (UART_WaitOnFlagUntilTimeout(huart, UART_FLAG_TC, RESET, tickstart, Timeout) != HAL_OK)
  1184.     {
  1185.       return HAL_TIMEOUT;
  1186.     }
  1187.  
  1188.     /* At end of Tx process, restore huart->gState to Ready */
  1189.     huart->gState = HAL_UART_STATE_READY;
  1190.  
  1191.     return HAL_OK;
  1192.   }
  1193.   else
  1194.   {
  1195.     return HAL_BUSY;
  1196.   }
  1197. }
  1198.  
  1199. /**
  1200.   * @brief  Receives an amount of data in blocking mode.
  1201.   * @note   When UART parity is not enabled (PCE = 0), and Word Length is configured to 9 bits (M1-M0 = 01),
  1202.   *         the received data is handled as a set of u16. In this case, Size must indicate the number
  1203.   *         of u16 available through pData.
  1204.   * @param  huart Pointer to a UART_HandleTypeDef structure that contains
  1205.   *               the configuration information for the specified UART module.
  1206.   * @param  pData Pointer to data buffer (u8 or u16 data elements).
  1207.   * @param  Size  Amount of data elements (u8 or u16) to be received.
  1208.   * @param  Timeout Timeout duration
  1209.   * @retval HAL status
  1210.   */
  1211. HAL_StatusTypeDef HAL_UART_Receive(UART_HandleTypeDef *huart, uint8_t *pData, uint16_t Size, uint32_t Timeout)
  1212. {
  1213.   uint8_t  *pdata8bits;
  1214.   uint16_t *pdata16bits;
  1215.   uint32_t tickstart = 0U;
  1216.  
  1217.   /* Check that a Rx process is not already ongoing */
  1218.   if (huart->RxState == HAL_UART_STATE_READY)
  1219.   {
  1220.     if ((pData == NULL) || (Size == 0U))
  1221.     {
  1222.       return  HAL_ERROR;
  1223.     }
  1224.  
  1225.     huart->ErrorCode = HAL_UART_ERROR_NONE;
  1226.     huart->RxState = HAL_UART_STATE_BUSY_RX;
  1227.     huart->ReceptionType = HAL_UART_RECEPTION_STANDARD;
  1228.  
  1229.     /* Init tickstart for timeout management */
  1230.     tickstart = HAL_GetTick();
  1231.  
  1232.     huart->RxXferSize = Size;
  1233.     huart->RxXferCount = Size;
  1234.  
  1235.     /* In case of 9bits/No Parity transfer, pRxData needs to be handled as a uint16_t pointer */
  1236.     if ((huart->Init.WordLength == UART_WORDLENGTH_9B) && (huart->Init.Parity == UART_PARITY_NONE))
  1237.     {
  1238.       pdata8bits  = NULL;
  1239.       pdata16bits = (uint16_t *) pData;
  1240.     }
  1241.     else
  1242.     {
  1243.       pdata8bits  = pData;
  1244.       pdata16bits = NULL;
  1245.     }
  1246.  
  1247.     /* Check the remain data to be received */
  1248.     while (huart->RxXferCount > 0U)
  1249.     {
  1250.       if (UART_WaitOnFlagUntilTimeout(huart, UART_FLAG_RXNE, RESET, tickstart, Timeout) != HAL_OK)
  1251.       {
  1252.         return HAL_TIMEOUT;
  1253.       }
  1254.       if (pdata8bits == NULL)
  1255.       {
  1256.         *pdata16bits = (uint16_t)(huart->Instance->DR & 0x01FF);
  1257.         pdata16bits++;
  1258.       }
  1259.       else
  1260.       {
  1261.         if ((huart->Init.WordLength == UART_WORDLENGTH_9B) || ((huart->Init.WordLength == UART_WORDLENGTH_8B) && (huart->Init.Parity == UART_PARITY_NONE)))
  1262.         {
  1263.           *pdata8bits = (uint8_t)(huart->Instance->DR & (uint8_t)0x00FF);
  1264.         }
  1265.         else
  1266.         {
  1267.           *pdata8bits = (uint8_t)(huart->Instance->DR & (uint8_t)0x007F);
  1268.         }
  1269.         pdata8bits++;
  1270.       }
  1271.       huart->RxXferCount--;
  1272.     }
  1273.  
  1274.     /* At end of Rx process, restore huart->RxState to Ready */
  1275.     huart->RxState = HAL_UART_STATE_READY;
  1276.  
  1277.     return HAL_OK;
  1278.   }
  1279.   else
  1280.   {
  1281.     return HAL_BUSY;
  1282.   }
  1283. }
  1284.  
  1285. /**
  1286.   * @brief  Sends an amount of data in non blocking mode.
  1287.   * @note   When UART parity is not enabled (PCE = 0), and Word Length is configured to 9 bits (M1-M0 = 01),
  1288.   *         the sent data is handled as a set of u16. In this case, Size must indicate the number
  1289.   *         of u16 provided through pData.
  1290.   * @param  huart Pointer to a UART_HandleTypeDef structure that contains
  1291.   *               the configuration information for the specified UART module.
  1292.   * @param  pData Pointer to data buffer (u8 or u16 data elements).
  1293.   * @param  Size  Amount of data elements (u8 or u16) to be sent
  1294.   * @retval HAL status
  1295.   */
  1296. HAL_StatusTypeDef HAL_UART_Transmit_IT(UART_HandleTypeDef *huart, const uint8_t *pData, uint16_t Size)
  1297. {
  1298.   /* Check that a Tx process is not already ongoing */
  1299.   if (huart->gState == HAL_UART_STATE_READY)
  1300.   {
  1301.     if ((pData == NULL) || (Size == 0U))
  1302.     {
  1303.       return HAL_ERROR;
  1304.     }
  1305.  
  1306.     huart->pTxBuffPtr = pData;
  1307.     huart->TxXferSize = Size;
  1308.     huart->TxXferCount = Size;
  1309.  
  1310.     huart->ErrorCode = HAL_UART_ERROR_NONE;
  1311.     huart->gState = HAL_UART_STATE_BUSY_TX;
  1312.  
  1313.     /* Enable the UART Transmit data register empty Interrupt */
  1314.     __HAL_UART_ENABLE_IT(huart, UART_IT_TXE);
  1315.  
  1316.     return HAL_OK;
  1317.   }
  1318.   else
  1319.   {
  1320.     return HAL_BUSY;
  1321.   }
  1322. }
  1323.  
  1324. /**
  1325.   * @brief  Receives an amount of data in non blocking mode.
  1326.   * @note   When UART parity is not enabled (PCE = 0), and Word Length is configured to 9 bits (M1-M0 = 01),
  1327.   *         the received data is handled as a set of u16. In this case, Size must indicate the number
  1328.   *         of u16 available through pData.
  1329.   * @param  huart Pointer to a UART_HandleTypeDef structure that contains
  1330.   *               the configuration information for the specified UART module.
  1331.   * @param  pData Pointer to data buffer (u8 or u16 data elements).
  1332.   * @param  Size  Amount of data elements (u8 or u16) to be received.
  1333.   * @retval HAL status
  1334.   */
  1335. HAL_StatusTypeDef HAL_UART_Receive_IT(UART_HandleTypeDef *huart, uint8_t *pData, uint16_t Size)
  1336. {
  1337.   /* Check that a Rx process is not already ongoing */
  1338.   if (huart->RxState == HAL_UART_STATE_READY)
  1339.   {
  1340.     if ((pData == NULL) || (Size == 0U))
  1341.     {
  1342.       return HAL_ERROR;
  1343.     }
  1344.  
  1345.     /* Set Reception type to Standard reception */
  1346.     huart->ReceptionType = HAL_UART_RECEPTION_STANDARD;
  1347.  
  1348.     return (UART_Start_Receive_IT(huart, pData, Size));
  1349.   }
  1350.   else
  1351.   {
  1352.     return HAL_BUSY;
  1353.   }
  1354. }
  1355.  
  1356. /**
  1357.   * @brief  Sends an amount of data in DMA mode.
  1358.   * @note   When UART parity is not enabled (PCE = 0), and Word Length is configured to 9 bits (M1-M0 = 01),
  1359.   *         the sent data is handled as a set of u16. In this case, Size must indicate the number
  1360.   *         of u16 provided through pData.
  1361.   * @param  huart  Pointer to a UART_HandleTypeDef structure that contains
  1362.   *                the configuration information for the specified UART module.
  1363.   * @param  pData Pointer to data buffer (u8 or u16 data elements).
  1364.   * @param  Size  Amount of data elements (u8 or u16) to be sent
  1365.   * @retval HAL status
  1366.   */
  1367. HAL_StatusTypeDef HAL_UART_Transmit_DMA(UART_HandleTypeDef *huart, const uint8_t *pData, uint16_t Size)
  1368. {
  1369.   const uint32_t *tmp;
  1370.  
  1371.   /* Check that a Tx process is not already ongoing */
  1372.   if (huart->gState == HAL_UART_STATE_READY)
  1373.   {
  1374.     if ((pData == NULL) || (Size == 0U))
  1375.     {
  1376.       return HAL_ERROR;
  1377.     }
  1378.  
  1379.     huart->pTxBuffPtr = pData;
  1380.     huart->TxXferSize = Size;
  1381.     huart->TxXferCount = Size;
  1382.  
  1383.     huart->ErrorCode = HAL_UART_ERROR_NONE;
  1384.     huart->gState = HAL_UART_STATE_BUSY_TX;
  1385.  
  1386.     /* Set the UART DMA transfer complete callback */
  1387.     huart->hdmatx->XferCpltCallback = UART_DMATransmitCplt;
  1388.  
  1389.     /* Set the UART DMA Half transfer complete callback */
  1390.     huart->hdmatx->XferHalfCpltCallback = UART_DMATxHalfCplt;
  1391.  
  1392.     /* Set the DMA error callback */
  1393.     huart->hdmatx->XferErrorCallback = UART_DMAError;
  1394.  
  1395.     /* Set the DMA abort callback */
  1396.     huart->hdmatx->XferAbortCallback = NULL;
  1397.  
  1398.     /* Enable the UART transmit DMA channel */
  1399.     tmp = (const uint32_t *)&pData;
  1400.     HAL_DMA_Start_IT(huart->hdmatx, *(const uint32_t *)tmp, (uint32_t)&huart->Instance->DR, Size);
  1401.  
  1402.     /* Clear the TC flag in the SR register by writing 0 to it */
  1403.     __HAL_UART_CLEAR_FLAG(huart, UART_FLAG_TC);
  1404.  
  1405.     /* Enable the DMA transfer for transmit request by setting the DMAT bit
  1406.        in the UART CR3 register */
  1407.     ATOMIC_SET_BIT(huart->Instance->CR3, USART_CR3_DMAT);
  1408.  
  1409.     return HAL_OK;
  1410.   }
  1411.   else
  1412.   {
  1413.     return HAL_BUSY;
  1414.   }
  1415. }
  1416.  
  1417. /**
  1418.   * @brief  Receives an amount of data in DMA mode.
  1419.   * @note   When UART parity is not enabled (PCE = 0), and Word Length is configured to 9 bits (M1-M0 = 01),
  1420.   *         the received data is handled as a set of u16. In this case, Size must indicate the number
  1421.   *         of u16 available through pData.
  1422.   * @param  huart Pointer to a UART_HandleTypeDef structure that contains
  1423.   *               the configuration information for the specified UART module.
  1424.   * @param  pData Pointer to data buffer (u8 or u16 data elements).
  1425.   * @param  Size  Amount of data elements (u8 or u16) to be received.
  1426.   * @note   When the UART parity is enabled (PCE = 1) the received data contains the parity bit.
  1427.   * @retval HAL status
  1428.   */
  1429. HAL_StatusTypeDef HAL_UART_Receive_DMA(UART_HandleTypeDef *huart, uint8_t *pData, uint16_t Size)
  1430. {
  1431.   /* Check that a Rx process is not already ongoing */
  1432.   if (huart->RxState == HAL_UART_STATE_READY)
  1433.   {
  1434.     if ((pData == NULL) || (Size == 0U))
  1435.     {
  1436.       return HAL_ERROR;
  1437.     }
  1438.  
  1439.     /* Set Reception type to Standard reception */
  1440.     huart->ReceptionType = HAL_UART_RECEPTION_STANDARD;
  1441.  
  1442.     return (UART_Start_Receive_DMA(huart, pData, Size));
  1443.   }
  1444.   else
  1445.   {
  1446.     return HAL_BUSY;
  1447.   }
  1448. }
  1449.  
  1450. /**
  1451.   * @brief Pauses the DMA Transfer.
  1452.   * @param  huart  Pointer to a UART_HandleTypeDef structure that contains
  1453.   *                the configuration information for the specified UART module.
  1454.   * @retval HAL status
  1455.   */
  1456. HAL_StatusTypeDef HAL_UART_DMAPause(UART_HandleTypeDef *huart)
  1457. {
  1458.   uint32_t dmarequest = 0x00U;
  1459.  
  1460.   dmarequest = HAL_IS_BIT_SET(huart->Instance->CR3, USART_CR3_DMAT);
  1461.   if ((huart->gState == HAL_UART_STATE_BUSY_TX) && dmarequest)
  1462.   {
  1463.     /* Disable the UART DMA Tx request */
  1464.     ATOMIC_CLEAR_BIT(huart->Instance->CR3, USART_CR3_DMAT);
  1465.   }
  1466.  
  1467.   dmarequest = HAL_IS_BIT_SET(huart->Instance->CR3, USART_CR3_DMAR);
  1468.   if ((huart->RxState == HAL_UART_STATE_BUSY_RX) && dmarequest)
  1469.   {
  1470.     /* Disable RXNE, PE and ERR (Frame error, noise error, overrun error) interrupts */
  1471.     ATOMIC_CLEAR_BIT(huart->Instance->CR1, USART_CR1_PEIE);
  1472.     ATOMIC_CLEAR_BIT(huart->Instance->CR3, USART_CR3_EIE);
  1473.  
  1474.     /* Disable the UART DMA Rx request */
  1475.     ATOMIC_CLEAR_BIT(huart->Instance->CR3, USART_CR3_DMAR);
  1476.   }
  1477.  
  1478.   return HAL_OK;
  1479. }
  1480.  
  1481. /**
  1482.   * @brief Resumes the DMA Transfer.
  1483.   * @param  huart  Pointer to a UART_HandleTypeDef structure that contains
  1484.   *                the configuration information for the specified UART module.
  1485.   * @retval HAL status
  1486.   */
  1487. HAL_StatusTypeDef HAL_UART_DMAResume(UART_HandleTypeDef *huart)
  1488. {
  1489.  
  1490.   if (huart->gState == HAL_UART_STATE_BUSY_TX)
  1491.   {
  1492.     /* Enable the UART DMA Tx request */
  1493.     ATOMIC_SET_BIT(huart->Instance->CR3, USART_CR3_DMAT);
  1494.   }
  1495.  
  1496.   if (huart->RxState == HAL_UART_STATE_BUSY_RX)
  1497.   {
  1498.     /* Clear the Overrun flag before resuming the Rx transfer*/
  1499.     __HAL_UART_CLEAR_OREFLAG(huart);
  1500.  
  1501.     /* Re-enable PE and ERR (Frame error, noise error, overrun error) interrupts */
  1502.     if (huart->Init.Parity != UART_PARITY_NONE)
  1503.     {
  1504.       ATOMIC_SET_BIT(huart->Instance->CR1, USART_CR1_PEIE);
  1505.     }
  1506.     ATOMIC_SET_BIT(huart->Instance->CR3, USART_CR3_EIE);
  1507.  
  1508.     /* Enable the UART DMA Rx request */
  1509.     ATOMIC_SET_BIT(huart->Instance->CR3, USART_CR3_DMAR);
  1510.   }
  1511.  
  1512.   return HAL_OK;
  1513. }
  1514.  
  1515. /**
  1516.   * @brief Stops the DMA Transfer.
  1517.   * @param  huart  Pointer to a UART_HandleTypeDef structure that contains
  1518.   *                the configuration information for the specified UART module.
  1519.   * @retval HAL status
  1520.   */
  1521. HAL_StatusTypeDef HAL_UART_DMAStop(UART_HandleTypeDef *huart)
  1522. {
  1523.   uint32_t dmarequest = 0x00U;
  1524.   /* The Lock is not implemented on this API to allow the user application
  1525.      to call the HAL UART API under callbacks HAL_UART_TxCpltCallback() / HAL_UART_RxCpltCallback():
  1526.      when calling HAL_DMA_Abort() API the DMA TX/RX Transfer complete interrupt is generated
  1527.      and the correspond call back is executed HAL_UART_TxCpltCallback() / HAL_UART_RxCpltCallback()
  1528.      */
  1529.  
  1530.   /* Stop UART DMA Tx request if ongoing */
  1531.   dmarequest = HAL_IS_BIT_SET(huart->Instance->CR3, USART_CR3_DMAT);
  1532.   if ((huart->gState == HAL_UART_STATE_BUSY_TX) && dmarequest)
  1533.   {
  1534.     ATOMIC_CLEAR_BIT(huart->Instance->CR3, USART_CR3_DMAT);
  1535.  
  1536.     /* Abort the UART DMA Tx channel */
  1537.     if (huart->hdmatx != NULL)
  1538.     {
  1539.       HAL_DMA_Abort(huart->hdmatx);
  1540.     }
  1541.     UART_EndTxTransfer(huart);
  1542.   }
  1543.  
  1544.   /* Stop UART DMA Rx request if ongoing */
  1545.   dmarequest = HAL_IS_BIT_SET(huart->Instance->CR3, USART_CR3_DMAR);
  1546.   if ((huart->RxState == HAL_UART_STATE_BUSY_RX) && dmarequest)
  1547.   {
  1548.     ATOMIC_CLEAR_BIT(huart->Instance->CR3, USART_CR3_DMAR);
  1549.  
  1550.     /* Abort the UART DMA Rx channel */
  1551.     if (huart->hdmarx != NULL)
  1552.     {
  1553.       HAL_DMA_Abort(huart->hdmarx);
  1554.     }
  1555.     UART_EndRxTransfer(huart);
  1556.   }
  1557.  
  1558.   return HAL_OK;
  1559. }
  1560.  
  1561. /**
  1562.   * @brief Receive an amount of data in blocking mode till either the expected number of data is received or an IDLE event occurs.
  1563.   * @note   HAL_OK is returned if reception is completed (expected number of data has been received)
  1564.   *         or if reception is stopped after IDLE event (less than the expected number of data has been received)
  1565.   *         In this case, RxLen output parameter indicates number of data available in reception buffer.
  1566.   * @note   When UART parity is not enabled (PCE = 0), and Word Length is configured to 9 bits (M = 01),
  1567.   *         the received data is handled as a set of uint16_t. In this case, Size must indicate the number
  1568.   *         of uint16_t available through pData.
  1569.   * @param huart   UART handle.
  1570.   * @param pData   Pointer to data buffer (uint8_t or uint16_t data elements).
  1571.   * @param Size    Amount of data elements (uint8_t or uint16_t) to be received.
  1572.   * @param RxLen   Number of data elements finally received (could be lower than Size, in case reception ends on IDLE event)
  1573.   * @param Timeout Timeout duration expressed in ms (covers the whole reception sequence).
  1574.   * @retval HAL status
  1575.   */
  1576. HAL_StatusTypeDef HAL_UARTEx_ReceiveToIdle(UART_HandleTypeDef *huart, uint8_t *pData, uint16_t Size, uint16_t *RxLen,
  1577.                                            uint32_t Timeout)
  1578. {
  1579.   uint8_t  *pdata8bits;
  1580.   uint16_t *pdata16bits;
  1581.   uint32_t tickstart;
  1582.  
  1583.   /* Check that a Rx process is not already ongoing */
  1584.   if (huart->RxState == HAL_UART_STATE_READY)
  1585.   {
  1586.     if ((pData == NULL) || (Size == 0U))
  1587.     {
  1588.       return  HAL_ERROR;
  1589.     }
  1590.  
  1591.     huart->ErrorCode = HAL_UART_ERROR_NONE;
  1592.     huart->RxState = HAL_UART_STATE_BUSY_RX;
  1593.     huart->ReceptionType = HAL_UART_RECEPTION_TOIDLE;
  1594.     huart->RxEventType = HAL_UART_RXEVENT_TC;
  1595.  
  1596.     /* Init tickstart for timeout management */
  1597.     tickstart = HAL_GetTick();
  1598.  
  1599.     huart->RxXferSize  = Size;
  1600.     huart->RxXferCount = Size;
  1601.  
  1602.     /* In case of 9bits/No Parity transfer, pRxData needs to be handled as a uint16_t pointer */
  1603.     if ((huart->Init.WordLength == UART_WORDLENGTH_9B) && (huart->Init.Parity == UART_PARITY_NONE))
  1604.     {
  1605.       pdata8bits  = NULL;
  1606.       pdata16bits = (uint16_t *) pData;
  1607.     }
  1608.     else
  1609.     {
  1610.       pdata8bits  = pData;
  1611.       pdata16bits = NULL;
  1612.     }
  1613.  
  1614.     /* Initialize output number of received elements */
  1615.     *RxLen = 0U;
  1616.  
  1617.     /* as long as data have to be received */
  1618.     while (huart->RxXferCount > 0U)
  1619.     {
  1620.       /* Check if IDLE flag is set */
  1621.       if (__HAL_UART_GET_FLAG(huart, UART_FLAG_IDLE))
  1622.       {
  1623.         /* Clear IDLE flag in ISR */
  1624.         __HAL_UART_CLEAR_IDLEFLAG(huart);
  1625.  
  1626.         /* If Set, but no data ever received, clear flag without exiting loop */
  1627.         /* If Set, and data has already been received, this means Idle Event is valid : End reception */
  1628.         if (*RxLen > 0U)
  1629.         {
  1630.           huart->RxEventType = HAL_UART_RXEVENT_IDLE;
  1631.           huart->RxState = HAL_UART_STATE_READY;
  1632.  
  1633.           return HAL_OK;
  1634.         }
  1635.       }
  1636.  
  1637.       /* Check if RXNE flag is set */
  1638.       if (__HAL_UART_GET_FLAG(huart, UART_FLAG_RXNE))
  1639.       {
  1640.         if (pdata8bits == NULL)
  1641.         {
  1642.           *pdata16bits = (uint16_t)(huart->Instance->DR & (uint16_t)0x01FF);
  1643.           pdata16bits++;
  1644.         }
  1645.         else
  1646.         {
  1647.           if ((huart->Init.WordLength == UART_WORDLENGTH_9B) || ((huart->Init.WordLength == UART_WORDLENGTH_8B) && (huart->Init.Parity == UART_PARITY_NONE)))
  1648.           {
  1649.             *pdata8bits = (uint8_t)(huart->Instance->DR & (uint8_t)0x00FF);
  1650.           }
  1651.           else
  1652.           {
  1653.             *pdata8bits = (uint8_t)(huart->Instance->DR & (uint8_t)0x007F);
  1654.           }
  1655.  
  1656.           pdata8bits++;
  1657.         }
  1658.         /* Increment number of received elements */
  1659.         *RxLen += 1U;
  1660.         huart->RxXferCount--;
  1661.       }
  1662.  
  1663.       /* Check for the Timeout */
  1664.       if (Timeout != HAL_MAX_DELAY)
  1665.       {
  1666.         if (((HAL_GetTick() - tickstart) > Timeout) || (Timeout == 0U))
  1667.         {
  1668.           huart->RxState = HAL_UART_STATE_READY;
  1669.  
  1670.           return HAL_TIMEOUT;
  1671.         }
  1672.       }
  1673.     }
  1674.  
  1675.     /* Set number of received elements in output parameter : RxLen */
  1676.     *RxLen = huart->RxXferSize - huart->RxXferCount;
  1677.     /* At end of Rx process, restore huart->RxState to Ready */
  1678.     huart->RxState = HAL_UART_STATE_READY;
  1679.  
  1680.     return HAL_OK;
  1681.   }
  1682.   else
  1683.   {
  1684.     return HAL_BUSY;
  1685.   }
  1686. }
  1687.  
  1688. /**
  1689.   * @brief Receive an amount of data in interrupt mode till either the expected number of data is received or an IDLE event occurs.
  1690.   * @note   Reception is initiated by this function call. Further progress of reception is achieved thanks
  1691.   *         to UART interrupts raised by RXNE and IDLE events. Callback is called at end of reception indicating
  1692.   *         number of received data elements.
  1693.   * @note   When UART parity is not enabled (PCE = 0), and Word Length is configured to 9 bits (M = 01),
  1694.   *         the received data is handled as a set of uint16_t. In this case, Size must indicate the number
  1695.   *         of uint16_t available through pData.
  1696.   * @param huart UART handle.
  1697.   * @param pData Pointer to data buffer (uint8_t or uint16_t data elements).
  1698.   * @param Size  Amount of data elements (uint8_t or uint16_t) to be received.
  1699.   * @retval HAL status
  1700.   */
  1701. HAL_StatusTypeDef HAL_UARTEx_ReceiveToIdle_IT(UART_HandleTypeDef *huart, uint8_t *pData, uint16_t Size)
  1702. {
  1703.   HAL_StatusTypeDef status;
  1704.  
  1705.   /* Check that a Rx process is not already ongoing */
  1706.   if (huart->RxState == HAL_UART_STATE_READY)
  1707.   {
  1708.     if ((pData == NULL) || (Size == 0U))
  1709.     {
  1710.       return HAL_ERROR;
  1711.     }
  1712.  
  1713.     /* Set Reception type to reception till IDLE Event*/
  1714.     huart->ReceptionType = HAL_UART_RECEPTION_TOIDLE;
  1715.     huart->RxEventType = HAL_UART_RXEVENT_TC;
  1716.  
  1717.     status =  UART_Start_Receive_IT(huart, pData, Size);
  1718.  
  1719.     /* Check Rx process has been successfully started */
  1720.     if (status == HAL_OK)
  1721.     {
  1722.       if (huart->ReceptionType == HAL_UART_RECEPTION_TOIDLE)
  1723.       {
  1724.         __HAL_UART_CLEAR_IDLEFLAG(huart);
  1725.         ATOMIC_SET_BIT(huart->Instance->CR1, USART_CR1_IDLEIE);
  1726.       }
  1727.       else
  1728.       {
  1729.         /* In case of errors already pending when reception is started,
  1730.            Interrupts may have already been raised and lead to reception abortion.
  1731.            (Overrun error for instance).
  1732.            In such case Reception Type has been reset to HAL_UART_RECEPTION_STANDARD. */
  1733.         status = HAL_ERROR;
  1734.       }
  1735.     }
  1736.  
  1737.     return status;
  1738.   }
  1739.   else
  1740.   {
  1741.     return HAL_BUSY;
  1742.   }
  1743. }
  1744.  
  1745. /**
  1746.   * @brief Receive an amount of data in DMA mode till either the expected number of data is received or an IDLE event occurs.
  1747.   * @note   Reception is initiated by this function call. Further progress of reception is achieved thanks
  1748.   *         to DMA services, transferring automatically received data elements in user reception buffer and
  1749.   *         calling registered callbacks at half/end of reception. UART IDLE events are also used to consider
  1750.   *         reception phase as ended. In all cases, callback execution will indicate number of received data elements.
  1751.   * @note   When the UART parity is enabled (PCE = 1), the received data contain
  1752.   *         the parity bit (MSB position).
  1753.   * @note   When UART parity is not enabled (PCE = 0), and Word Length is configured to 9 bits (M = 01),
  1754.   *         the received data is handled as a set of uint16_t. In this case, Size must indicate the number
  1755.   *         of uint16_t available through pData.
  1756.   * @param huart UART handle.
  1757.   * @param pData Pointer to data buffer (uint8_t or uint16_t data elements).
  1758.   * @param Size  Amount of data elements (uint8_t or uint16_t) to be received.
  1759.   * @retval HAL status
  1760.   */
  1761. HAL_StatusTypeDef HAL_UARTEx_ReceiveToIdle_DMA(UART_HandleTypeDef *huart, uint8_t *pData, uint16_t Size)
  1762. {
  1763.   HAL_StatusTypeDef status;
  1764.  
  1765.   /* Check that a Rx process is not already ongoing */
  1766.   if (huart->RxState == HAL_UART_STATE_READY)
  1767.   {
  1768.     if ((pData == NULL) || (Size == 0U))
  1769.     {
  1770.       return HAL_ERROR;
  1771.     }
  1772.  
  1773.     /* Set Reception type to reception till IDLE Event*/
  1774.     huart->ReceptionType = HAL_UART_RECEPTION_TOIDLE;
  1775.     huart->RxEventType = HAL_UART_RXEVENT_TC;
  1776.  
  1777.     status =  UART_Start_Receive_DMA(huart, pData, Size);
  1778.  
  1779.     /* Check Rx process has been successfully started */
  1780.     if (status == HAL_OK)
  1781.     {
  1782.       if (huart->ReceptionType == HAL_UART_RECEPTION_TOIDLE)
  1783.       {
  1784.         __HAL_UART_CLEAR_IDLEFLAG(huart);
  1785.         ATOMIC_SET_BIT(huart->Instance->CR1, USART_CR1_IDLEIE);
  1786.       }
  1787.       else
  1788.       {
  1789.         /* In case of errors already pending when reception is started,
  1790.            Interrupts may have already been raised and lead to reception abortion.
  1791.            (Overrun error for instance).
  1792.            In such case Reception Type has been reset to HAL_UART_RECEPTION_STANDARD. */
  1793.         status = HAL_ERROR;
  1794.       }
  1795.     }
  1796.  
  1797.     return status;
  1798.   }
  1799.   else
  1800.   {
  1801.     return HAL_BUSY;
  1802.   }
  1803. }
  1804.  
  1805. /**
  1806.   * @brief Provide Rx Event type that has lead to RxEvent callback execution.
  1807.   * @note  When HAL_UARTEx_ReceiveToIdle_IT() or HAL_UARTEx_ReceiveToIdle_DMA() API are called, progress
  1808.   *        of reception process is provided to application through calls of Rx Event callback (either default one
  1809.   *        HAL_UARTEx_RxEventCallback() or user registered one). As several types of events could occur (IDLE event,
  1810.   *        Half Transfer, or Transfer Complete), this function allows to retrieve the Rx Event type that has lead
  1811.   *        to Rx Event callback execution.
  1812.   * @note  This function is expected to be called within the user implementation of Rx Event Callback,
  1813.   *        in order to provide the accurate value :
  1814.   *        In Interrupt Mode :
  1815.   *           - HAL_UART_RXEVENT_TC : when Reception has been completed (expected nb of data has been received)
  1816.   *           - HAL_UART_RXEVENT_IDLE : when Idle event occurred prior reception has been completed (nb of
  1817.   *             received data is lower than expected one)
  1818.   *        In DMA Mode :
  1819.   *           - HAL_UART_RXEVENT_TC : when Reception has been completed (expected nb of data has been received)
  1820.   *           - HAL_UART_RXEVENT_HT : when half of expected nb of data has been received
  1821.   *           - HAL_UART_RXEVENT_IDLE : when Idle event occurred prior reception has been completed (nb of
  1822.   *             received data is lower than expected one).
  1823.   *        In DMA mode, RxEvent callback could be called several times;
  1824.   *        When DMA is configured in Normal Mode, HT event does not stop Reception process;
  1825.   *        When DMA is configured in Circular Mode, HT, TC or IDLE events don't stop Reception process;
  1826.   * @param  huart UART handle.
  1827.   * @retval Rx Event Type (returned value will be a value of @ref UART_RxEvent_Type_Values)
  1828.   */
  1829. HAL_UART_RxEventTypeTypeDef HAL_UARTEx_GetRxEventType(UART_HandleTypeDef *huart)
  1830. {
  1831.   /* Return Rx Event type value, as stored in UART handle */
  1832.   return(huart->RxEventType);
  1833. }
  1834.  
  1835. /**
  1836.   * @brief  Abort ongoing transfers (blocking mode).
  1837.   * @param  huart UART handle.
  1838.   * @note   This procedure could be used for aborting any ongoing transfer started in Interrupt or DMA mode.
  1839.   *         This procedure performs following operations :
  1840.   *           - Disable UART Interrupts (Tx and Rx)
  1841.   *           - Disable the DMA transfer in the peripheral register (if enabled)
  1842.   *           - Abort DMA transfer by calling HAL_DMA_Abort (in case of transfer in DMA mode)
  1843.   *           - Set handle State to READY
  1844.   * @note   This procedure is executed in blocking mode : when exiting function, Abort is considered as completed.
  1845.   * @retval HAL status
  1846.   */
  1847. HAL_StatusTypeDef HAL_UART_Abort(UART_HandleTypeDef *huart)
  1848. {
  1849.   /* Disable TXEIE, TCIE, RXNE, PE and ERR (Frame error, noise error, overrun error) interrupts */
  1850.   ATOMIC_CLEAR_BIT(huart->Instance->CR1, (USART_CR1_RXNEIE | USART_CR1_PEIE | USART_CR1_TXEIE | USART_CR1_TCIE));
  1851.   ATOMIC_CLEAR_BIT(huart->Instance->CR3, USART_CR3_EIE);
  1852.  
  1853.   /* If Reception till IDLE event was ongoing, disable IDLEIE interrupt */
  1854.   if (huart->ReceptionType == HAL_UART_RECEPTION_TOIDLE)
  1855.   {
  1856.     ATOMIC_CLEAR_BIT(huart->Instance->CR1, (USART_CR1_IDLEIE));
  1857.   }
  1858.  
  1859.   /* Disable the UART DMA Tx request if enabled */
  1860.   if (HAL_IS_BIT_SET(huart->Instance->CR3, USART_CR3_DMAT))
  1861.   {
  1862.     ATOMIC_CLEAR_BIT(huart->Instance->CR3, USART_CR3_DMAT);
  1863.  
  1864.     /* Abort the UART DMA Tx channel: use blocking DMA Abort API (no callback) */
  1865.     if (huart->hdmatx != NULL)
  1866.     {
  1867.       /* Set the UART DMA Abort callback to Null.
  1868.          No call back execution at end of DMA abort procedure */
  1869.       huart->hdmatx->XferAbortCallback = NULL;
  1870.  
  1871.       if (HAL_DMA_Abort(huart->hdmatx) != HAL_OK)
  1872.       {
  1873.         if (HAL_DMA_GetError(huart->hdmatx) == HAL_DMA_ERROR_TIMEOUT)
  1874.         {
  1875.           /* Set error code to DMA */
  1876.           huart->ErrorCode = HAL_UART_ERROR_DMA;
  1877.  
  1878.           return HAL_TIMEOUT;
  1879.         }
  1880.       }
  1881.     }
  1882.   }
  1883.  
  1884.   /* Disable the UART DMA Rx request if enabled */
  1885.   if (HAL_IS_BIT_SET(huart->Instance->CR3, USART_CR3_DMAR))
  1886.   {
  1887.     ATOMIC_CLEAR_BIT(huart->Instance->CR3, USART_CR3_DMAR);
  1888.  
  1889.     /* Abort the UART DMA Rx channel: use blocking DMA Abort API (no callback) */
  1890.     if (huart->hdmarx != NULL)
  1891.     {
  1892.       /* Set the UART DMA Abort callback to Null.
  1893.          No call back execution at end of DMA abort procedure */
  1894.       huart->hdmarx->XferAbortCallback = NULL;
  1895.  
  1896.       if (HAL_DMA_Abort(huart->hdmarx) != HAL_OK)
  1897.       {
  1898.         if (HAL_DMA_GetError(huart->hdmarx) == HAL_DMA_ERROR_TIMEOUT)
  1899.         {
  1900.           /* Set error code to DMA */
  1901.           huart->ErrorCode = HAL_UART_ERROR_DMA;
  1902.  
  1903.           return HAL_TIMEOUT;
  1904.         }
  1905.       }
  1906.     }
  1907.   }
  1908.  
  1909.   /* Reset Tx and Rx transfer counters */
  1910.   huart->TxXferCount = 0x00U;
  1911.   huart->RxXferCount = 0x00U;
  1912.  
  1913.   /* Reset ErrorCode */
  1914.   huart->ErrorCode = HAL_UART_ERROR_NONE;
  1915.  
  1916.   /* Restore huart->RxState and huart->gState to Ready */
  1917.   huart->RxState = HAL_UART_STATE_READY;
  1918.   huart->gState = HAL_UART_STATE_READY;
  1919.   huart->ReceptionType = HAL_UART_RECEPTION_STANDARD;
  1920.  
  1921.   return HAL_OK;
  1922. }
  1923.  
  1924. /**
  1925.   * @brief  Abort ongoing Transmit transfer (blocking mode).
  1926.   * @param  huart UART handle.
  1927.   * @note   This procedure could be used for aborting any ongoing Tx transfer started in Interrupt or DMA mode.
  1928.   *         This procedure performs following operations :
  1929.   *           - Disable UART Interrupts (Tx)
  1930.   *           - Disable the DMA transfer in the peripheral register (if enabled)
  1931.   *           - Abort DMA transfer by calling HAL_DMA_Abort (in case of transfer in DMA mode)
  1932.   *           - Set handle State to READY
  1933.   * @note   This procedure is executed in blocking mode : when exiting function, Abort is considered as completed.
  1934.   * @retval HAL status
  1935.   */
  1936. HAL_StatusTypeDef HAL_UART_AbortTransmit(UART_HandleTypeDef *huart)
  1937. {
  1938.   /* Disable TXEIE and TCIE interrupts */
  1939.   ATOMIC_CLEAR_BIT(huart->Instance->CR1, (USART_CR1_TXEIE | USART_CR1_TCIE));
  1940.  
  1941.   /* Disable the UART DMA Tx request if enabled */
  1942.   if (HAL_IS_BIT_SET(huart->Instance->CR3, USART_CR3_DMAT))
  1943.   {
  1944.     ATOMIC_CLEAR_BIT(huart->Instance->CR3, USART_CR3_DMAT);
  1945.  
  1946.     /* Abort the UART DMA Tx channel : use blocking DMA Abort API (no callback) */
  1947.     if (huart->hdmatx != NULL)
  1948.     {
  1949.       /* Set the UART DMA Abort callback to Null.
  1950.          No call back execution at end of DMA abort procedure */
  1951.       huart->hdmatx->XferAbortCallback = NULL;
  1952.  
  1953.       if (HAL_DMA_Abort(huart->hdmatx) != HAL_OK)
  1954.       {
  1955.         if (HAL_DMA_GetError(huart->hdmatx) == HAL_DMA_ERROR_TIMEOUT)
  1956.         {
  1957.           /* Set error code to DMA */
  1958.           huart->ErrorCode = HAL_UART_ERROR_DMA;
  1959.  
  1960.           return HAL_TIMEOUT;
  1961.         }
  1962.       }
  1963.     }
  1964.   }
  1965.  
  1966.   /* Reset Tx transfer counter */
  1967.   huart->TxXferCount = 0x00U;
  1968.  
  1969.   /* Restore huart->gState to Ready */
  1970.   huart->gState = HAL_UART_STATE_READY;
  1971.  
  1972.   return HAL_OK;
  1973. }
  1974.  
  1975. /**
  1976.   * @brief  Abort ongoing Receive transfer (blocking mode).
  1977.   * @param  huart UART handle.
  1978.   * @note   This procedure could be used for aborting any ongoing Rx transfer started in Interrupt or DMA mode.
  1979.   *         This procedure performs following operations :
  1980.   *           - Disable UART Interrupts (Rx)
  1981.   *           - Disable the DMA transfer in the peripheral register (if enabled)
  1982.   *           - Abort DMA transfer by calling HAL_DMA_Abort (in case of transfer in DMA mode)
  1983.   *           - Set handle State to READY
  1984.   * @note   This procedure is executed in blocking mode : when exiting function, Abort is considered as completed.
  1985.   * @retval HAL status
  1986.   */
  1987. HAL_StatusTypeDef HAL_UART_AbortReceive(UART_HandleTypeDef *huart)
  1988. {
  1989.   /* Disable RXNE, PE and ERR (Frame error, noise error, overrun error) interrupts */
  1990.   ATOMIC_CLEAR_BIT(huart->Instance->CR1, (USART_CR1_RXNEIE | USART_CR1_PEIE));
  1991.   ATOMIC_CLEAR_BIT(huart->Instance->CR3, USART_CR3_EIE);
  1992.  
  1993.   /* If Reception till IDLE event was ongoing, disable IDLEIE interrupt */
  1994.   if (huart->ReceptionType == HAL_UART_RECEPTION_TOIDLE)
  1995.   {
  1996.     ATOMIC_CLEAR_BIT(huart->Instance->CR1, (USART_CR1_IDLEIE));
  1997.   }
  1998.  
  1999.   /* Disable the UART DMA Rx request if enabled */
  2000.   if (HAL_IS_BIT_SET(huart->Instance->CR3, USART_CR3_DMAR))
  2001.   {
  2002.     ATOMIC_CLEAR_BIT(huart->Instance->CR3, USART_CR3_DMAR);
  2003.  
  2004.     /* Abort the UART DMA Rx channel : use blocking DMA Abort API (no callback) */
  2005.     if (huart->hdmarx != NULL)
  2006.     {
  2007.       /* Set the UART DMA Abort callback to Null.
  2008.          No call back execution at end of DMA abort procedure */
  2009.       huart->hdmarx->XferAbortCallback = NULL;
  2010.  
  2011.       if (HAL_DMA_Abort(huart->hdmarx) != HAL_OK)
  2012.       {
  2013.         if (HAL_DMA_GetError(huart->hdmarx) == HAL_DMA_ERROR_TIMEOUT)
  2014.         {
  2015.           /* Set error code to DMA */
  2016.           huart->ErrorCode = HAL_UART_ERROR_DMA;
  2017.  
  2018.           return HAL_TIMEOUT;
  2019.         }
  2020.       }
  2021.     }
  2022.   }
  2023.  
  2024.   /* Reset Rx transfer counter */
  2025.   huart->RxXferCount = 0x00U;
  2026.  
  2027.   /* Restore huart->RxState to Ready */
  2028.   huart->RxState = HAL_UART_STATE_READY;
  2029.   huart->ReceptionType = HAL_UART_RECEPTION_STANDARD;
  2030.  
  2031.   return HAL_OK;
  2032. }
  2033.  
  2034. /**
  2035.   * @brief  Abort ongoing transfers (Interrupt mode).
  2036.   * @param  huart UART handle.
  2037.   * @note   This procedure could be used for aborting any ongoing transfer started in Interrupt or DMA mode.
  2038.   *         This procedure performs following operations :
  2039.   *           - Disable UART Interrupts (Tx and Rx)
  2040.   *           - Disable the DMA transfer in the peripheral register (if enabled)
  2041.   *           - Abort DMA transfer by calling HAL_DMA_Abort_IT (in case of transfer in DMA mode)
  2042.   *           - Set handle State to READY
  2043.   *           - At abort completion, call user abort complete callback
  2044.   * @note   This procedure is executed in Interrupt mode, meaning that abort procedure could be
  2045.   *         considered as completed only when user abort complete callback is executed (not when exiting function).
  2046.   * @retval HAL status
  2047.   */
  2048. HAL_StatusTypeDef HAL_UART_Abort_IT(UART_HandleTypeDef *huart)
  2049. {
  2050.   uint32_t AbortCplt = 0x01U;
  2051.  
  2052.   /* Disable TXEIE, TCIE, RXNE, PE and ERR (Frame error, noise error, overrun error) interrupts */
  2053.   ATOMIC_CLEAR_BIT(huart->Instance->CR1, (USART_CR1_RXNEIE | USART_CR1_PEIE | USART_CR1_TXEIE | USART_CR1_TCIE));
  2054.   ATOMIC_CLEAR_BIT(huart->Instance->CR3, USART_CR3_EIE);
  2055.  
  2056.   /* If Reception till IDLE event was ongoing, disable IDLEIE interrupt */
  2057.   if (huart->ReceptionType == HAL_UART_RECEPTION_TOIDLE)
  2058.   {
  2059.     ATOMIC_CLEAR_BIT(huart->Instance->CR1, (USART_CR1_IDLEIE));
  2060.   }
  2061.  
  2062.   /* If DMA Tx and/or DMA Rx Handles are associated to UART Handle, DMA Abort complete callbacks should be initialised
  2063.      before any call to DMA Abort functions */
  2064.   /* DMA Tx Handle is valid */
  2065.   if (huart->hdmatx != NULL)
  2066.   {
  2067.     /* Set DMA Abort Complete callback if UART DMA Tx request if enabled.
  2068.        Otherwise, set it to NULL */
  2069.     if (HAL_IS_BIT_SET(huart->Instance->CR3, USART_CR3_DMAT))
  2070.     {
  2071.       huart->hdmatx->XferAbortCallback = UART_DMATxAbortCallback;
  2072.     }
  2073.     else
  2074.     {
  2075.       huart->hdmatx->XferAbortCallback = NULL;
  2076.     }
  2077.   }
  2078.   /* DMA Rx Handle is valid */
  2079.   if (huart->hdmarx != NULL)
  2080.   {
  2081.     /* Set DMA Abort Complete callback if UART DMA Rx request if enabled.
  2082.        Otherwise, set it to NULL */
  2083.     if (HAL_IS_BIT_SET(huart->Instance->CR3, USART_CR3_DMAR))
  2084.     {
  2085.       huart->hdmarx->XferAbortCallback = UART_DMARxAbortCallback;
  2086.     }
  2087.     else
  2088.     {
  2089.       huart->hdmarx->XferAbortCallback = NULL;
  2090.     }
  2091.   }
  2092.  
  2093.   /* Disable the UART DMA Tx request if enabled */
  2094.   if (HAL_IS_BIT_SET(huart->Instance->CR3, USART_CR3_DMAT))
  2095.   {
  2096.     /* Disable DMA Tx at UART level */
  2097.     ATOMIC_CLEAR_BIT(huart->Instance->CR3, USART_CR3_DMAT);
  2098.  
  2099.     /* Abort the UART DMA Tx channel : use non blocking DMA Abort API (callback) */
  2100.     if (huart->hdmatx != NULL)
  2101.     {
  2102.       /* UART Tx DMA Abort callback has already been initialised :
  2103.          will lead to call HAL_UART_AbortCpltCallback() at end of DMA abort procedure */
  2104.  
  2105.       /* Abort DMA TX */
  2106.       if (HAL_DMA_Abort_IT(huart->hdmatx) != HAL_OK)
  2107.       {
  2108.         huart->hdmatx->XferAbortCallback = NULL;
  2109.       }
  2110.       else
  2111.       {
  2112.         AbortCplt = 0x00U;
  2113.       }
  2114.     }
  2115.   }
  2116.  
  2117.   /* Disable the UART DMA Rx request if enabled */
  2118.   if (HAL_IS_BIT_SET(huart->Instance->CR3, USART_CR3_DMAR))
  2119.   {
  2120.     ATOMIC_CLEAR_BIT(huart->Instance->CR3, USART_CR3_DMAR);
  2121.  
  2122.     /* Abort the UART DMA Rx channel : use non blocking DMA Abort API (callback) */
  2123.     if (huart->hdmarx != NULL)
  2124.     {
  2125.       /* UART Rx DMA Abort callback has already been initialised :
  2126.          will lead to call HAL_UART_AbortCpltCallback() at end of DMA abort procedure */
  2127.  
  2128.       /* Abort DMA RX */
  2129.       if (HAL_DMA_Abort_IT(huart->hdmarx) != HAL_OK)
  2130.       {
  2131.         huart->hdmarx->XferAbortCallback = NULL;
  2132.         AbortCplt = 0x01U;
  2133.       }
  2134.       else
  2135.       {
  2136.         AbortCplt = 0x00U;
  2137.       }
  2138.     }
  2139.   }
  2140.  
  2141.   /* if no DMA abort complete callback execution is required => call user Abort Complete callback */
  2142.   if (AbortCplt == 0x01U)
  2143.   {
  2144.     /* Reset Tx and Rx transfer counters */
  2145.     huart->TxXferCount = 0x00U;
  2146.     huart->RxXferCount = 0x00U;
  2147.  
  2148.     /* Reset ErrorCode */
  2149.     huart->ErrorCode = HAL_UART_ERROR_NONE;
  2150.  
  2151.     /* Restore huart->gState and huart->RxState to Ready */
  2152.     huart->gState  = HAL_UART_STATE_READY;
  2153.     huart->RxState = HAL_UART_STATE_READY;
  2154.     huart->ReceptionType = HAL_UART_RECEPTION_STANDARD;
  2155.  
  2156.     /* As no DMA to be aborted, call directly user Abort complete callback */
  2157. #if (USE_HAL_UART_REGISTER_CALLBACKS == 1)
  2158.     /* Call registered Abort complete callback */
  2159.     huart->AbortCpltCallback(huart);
  2160. #else
  2161.     /* Call legacy weak Abort complete callback */
  2162.     HAL_UART_AbortCpltCallback(huart);
  2163. #endif /* USE_HAL_UART_REGISTER_CALLBACKS */
  2164.   }
  2165.  
  2166.   return HAL_OK;
  2167. }
  2168.  
  2169. /**
  2170.   * @brief  Abort ongoing Transmit transfer (Interrupt mode).
  2171.   * @param  huart UART handle.
  2172.   * @note   This procedure could be used for aborting any ongoing Tx transfer started in Interrupt or DMA mode.
  2173.   *         This procedure performs following operations :
  2174.   *           - Disable UART Interrupts (Tx)
  2175.   *           - Disable the DMA transfer in the peripheral register (if enabled)
  2176.   *           - Abort DMA transfer by calling HAL_DMA_Abort_IT (in case of transfer in DMA mode)
  2177.   *           - Set handle State to READY
  2178.   *           - At abort completion, call user abort complete callback
  2179.   * @note   This procedure is executed in Interrupt mode, meaning that abort procedure could be
  2180.   *         considered as completed only when user abort complete callback is executed (not when exiting function).
  2181.   * @retval HAL status
  2182.   */
  2183. HAL_StatusTypeDef HAL_UART_AbortTransmit_IT(UART_HandleTypeDef *huart)
  2184. {
  2185.   /* Disable TXEIE and TCIE interrupts */
  2186.   ATOMIC_CLEAR_BIT(huart->Instance->CR1, (USART_CR1_TXEIE | USART_CR1_TCIE));
  2187.  
  2188.   /* Disable the UART DMA Tx request if enabled */
  2189.   if (HAL_IS_BIT_SET(huart->Instance->CR3, USART_CR3_DMAT))
  2190.   {
  2191.     ATOMIC_CLEAR_BIT(huart->Instance->CR3, USART_CR3_DMAT);
  2192.  
  2193.     /* Abort the UART DMA Tx channel : use blocking DMA Abort API (no callback) */
  2194.     if (huart->hdmatx != NULL)
  2195.     {
  2196.       /* Set the UART DMA Abort callback :
  2197.          will lead to call HAL_UART_AbortCpltCallback() at end of DMA abort procedure */
  2198.       huart->hdmatx->XferAbortCallback = UART_DMATxOnlyAbortCallback;
  2199.  
  2200.       /* Abort DMA TX */
  2201.       if (HAL_DMA_Abort_IT(huart->hdmatx) != HAL_OK)
  2202.       {
  2203.         /* Call Directly huart->hdmatx->XferAbortCallback function in case of error */
  2204.         huart->hdmatx->XferAbortCallback(huart->hdmatx);
  2205.       }
  2206.     }
  2207.     else
  2208.     {
  2209.       /* Reset Tx transfer counter */
  2210.       huart->TxXferCount = 0x00U;
  2211.  
  2212.       /* Restore huart->gState to Ready */
  2213.       huart->gState = HAL_UART_STATE_READY;
  2214.  
  2215.       /* As no DMA to be aborted, call directly user Abort complete callback */
  2216. #if (USE_HAL_UART_REGISTER_CALLBACKS == 1)
  2217.       /* Call registered Abort Transmit Complete Callback */
  2218.       huart->AbortTransmitCpltCallback(huart);
  2219. #else
  2220.       /* Call legacy weak Abort Transmit Complete Callback */
  2221.       HAL_UART_AbortTransmitCpltCallback(huart);
  2222. #endif /* USE_HAL_UART_REGISTER_CALLBACKS */
  2223.     }
  2224.   }
  2225.   else
  2226.   {
  2227.     /* Reset Tx transfer counter */
  2228.     huart->TxXferCount = 0x00U;
  2229.  
  2230.     /* Restore huart->gState to Ready */
  2231.     huart->gState = HAL_UART_STATE_READY;
  2232.  
  2233.     /* As no DMA to be aborted, call directly user Abort complete callback */
  2234. #if (USE_HAL_UART_REGISTER_CALLBACKS == 1)
  2235.     /* Call registered Abort Transmit Complete Callback */
  2236.     huart->AbortTransmitCpltCallback(huart);
  2237. #else
  2238.     /* Call legacy weak Abort Transmit Complete Callback */
  2239.     HAL_UART_AbortTransmitCpltCallback(huart);
  2240. #endif /* USE_HAL_UART_REGISTER_CALLBACKS */
  2241.   }
  2242.  
  2243.   return HAL_OK;
  2244. }
  2245.  
  2246. /**
  2247.   * @brief  Abort ongoing Receive transfer (Interrupt mode).
  2248.   * @param  huart UART handle.
  2249.   * @note   This procedure could be used for aborting any ongoing Rx transfer started in Interrupt or DMA mode.
  2250.   *         This procedure performs following operations :
  2251.   *           - Disable UART Interrupts (Rx)
  2252.   *           - Disable the DMA transfer in the peripheral register (if enabled)
  2253.   *           - Abort DMA transfer by calling HAL_DMA_Abort_IT (in case of transfer in DMA mode)
  2254.   *           - Set handle State to READY
  2255.   *           - At abort completion, call user abort complete callback
  2256.   * @note   This procedure is executed in Interrupt mode, meaning that abort procedure could be
  2257.   *         considered as completed only when user abort complete callback is executed (not when exiting function).
  2258.   * @retval HAL status
  2259.   */
  2260. HAL_StatusTypeDef HAL_UART_AbortReceive_IT(UART_HandleTypeDef *huart)
  2261. {
  2262.   /* Disable RXNE, PE and ERR (Frame error, noise error, overrun error) interrupts */
  2263.   ATOMIC_CLEAR_BIT(huart->Instance->CR1, (USART_CR1_RXNEIE | USART_CR1_PEIE));
  2264.   ATOMIC_CLEAR_BIT(huart->Instance->CR3, USART_CR3_EIE);
  2265.  
  2266.   /* If Reception till IDLE event was ongoing, disable IDLEIE interrupt */
  2267.   if (huart->ReceptionType == HAL_UART_RECEPTION_TOIDLE)
  2268.   {
  2269.     ATOMIC_CLEAR_BIT(huart->Instance->CR1, (USART_CR1_IDLEIE));
  2270.   }
  2271.  
  2272.   /* Disable the UART DMA Rx request if enabled */
  2273.   if (HAL_IS_BIT_SET(huart->Instance->CR3, USART_CR3_DMAR))
  2274.   {
  2275.     ATOMIC_CLEAR_BIT(huart->Instance->CR3, USART_CR3_DMAR);
  2276.  
  2277.     /* Abort the UART DMA Rx channel : use blocking DMA Abort API (no callback) */
  2278.     if (huart->hdmarx != NULL)
  2279.     {
  2280.       /* Set the UART DMA Abort callback :
  2281.          will lead to call HAL_UART_AbortCpltCallback() at end of DMA abort procedure */
  2282.       huart->hdmarx->XferAbortCallback = UART_DMARxOnlyAbortCallback;
  2283.  
  2284.       /* Abort DMA RX */
  2285.       if (HAL_DMA_Abort_IT(huart->hdmarx) != HAL_OK)
  2286.       {
  2287.         /* Call Directly huart->hdmarx->XferAbortCallback function in case of error */
  2288.         huart->hdmarx->XferAbortCallback(huart->hdmarx);
  2289.       }
  2290.     }
  2291.     else
  2292.     {
  2293.       /* Reset Rx transfer counter */
  2294.       huart->RxXferCount = 0x00U;
  2295.  
  2296.       /* Restore huart->RxState to Ready */
  2297.       huart->RxState = HAL_UART_STATE_READY;
  2298.       huart->ReceptionType = HAL_UART_RECEPTION_STANDARD;
  2299.  
  2300.       /* As no DMA to be aborted, call directly user Abort complete callback */
  2301. #if (USE_HAL_UART_REGISTER_CALLBACKS == 1)
  2302.       /* Call registered Abort Receive Complete Callback */
  2303.       huart->AbortReceiveCpltCallback(huart);
  2304. #else
  2305.       /* Call legacy weak Abort Receive Complete Callback */
  2306.       HAL_UART_AbortReceiveCpltCallback(huart);
  2307. #endif /* USE_HAL_UART_REGISTER_CALLBACKS */
  2308.     }
  2309.   }
  2310.   else
  2311.   {
  2312.     /* Reset Rx transfer counter */
  2313.     huart->RxXferCount = 0x00U;
  2314.  
  2315.     /* Restore huart->RxState to Ready */
  2316.     huart->RxState = HAL_UART_STATE_READY;
  2317.     huart->ReceptionType = HAL_UART_RECEPTION_STANDARD;
  2318.  
  2319.     /* As no DMA to be aborted, call directly user Abort complete callback */
  2320. #if (USE_HAL_UART_REGISTER_CALLBACKS == 1)
  2321.     /* Call registered Abort Receive Complete Callback */
  2322.     huart->AbortReceiveCpltCallback(huart);
  2323. #else
  2324.     /* Call legacy weak Abort Receive Complete Callback */
  2325.     HAL_UART_AbortReceiveCpltCallback(huart);
  2326. #endif /* USE_HAL_UART_REGISTER_CALLBACKS */
  2327.   }
  2328.  
  2329.   return HAL_OK;
  2330. }
  2331.  
  2332. /**
  2333.   * @brief  This function handles UART interrupt request.
  2334.   * @param  huart  Pointer to a UART_HandleTypeDef structure that contains
  2335.   *                the configuration information for the specified UART module.
  2336.   * @retval None
  2337.   */
  2338. void HAL_UART_IRQHandler(UART_HandleTypeDef *huart)
  2339. {
  2340.   uint32_t isrflags   = READ_REG(huart->Instance->SR);
  2341.   uint32_t cr1its     = READ_REG(huart->Instance->CR1);
  2342.   uint32_t cr3its     = READ_REG(huart->Instance->CR3);
  2343.   uint32_t errorflags = 0x00U;
  2344.   uint32_t dmarequest = 0x00U;
  2345.  
  2346.   /* If no error occurs */
  2347.   errorflags = (isrflags & (uint32_t)(USART_SR_PE | USART_SR_FE | USART_SR_ORE | USART_SR_NE));
  2348.   if (errorflags == RESET)
  2349.   {
  2350.     /* UART in mode Receiver -------------------------------------------------*/
  2351.     if (((isrflags & USART_SR_RXNE) != RESET) && ((cr1its & USART_CR1_RXNEIE) != RESET))
  2352.     {
  2353.       UART_Receive_IT(huart);
  2354.       return;
  2355.     }
  2356.   }
  2357.  
  2358.   /* If some errors occur */
  2359.   if ((errorflags != RESET) && (((cr3its & USART_CR3_EIE) != RESET)
  2360.                                 || ((cr1its & (USART_CR1_RXNEIE | USART_CR1_PEIE)) != RESET)))
  2361.   {
  2362.     /* UART parity error interrupt occurred ----------------------------------*/
  2363.     if (((isrflags & USART_SR_PE) != RESET) && ((cr1its & USART_CR1_PEIE) != RESET))
  2364.     {
  2365.       huart->ErrorCode |= HAL_UART_ERROR_PE;
  2366.     }
  2367.  
  2368.     /* UART noise error interrupt occurred -----------------------------------*/
  2369.     if (((isrflags & USART_SR_NE) != RESET) && ((cr3its & USART_CR3_EIE) != RESET))
  2370.     {
  2371.       huart->ErrorCode |= HAL_UART_ERROR_NE;
  2372.     }
  2373.  
  2374.     /* UART frame error interrupt occurred -----------------------------------*/
  2375.     if (((isrflags & USART_SR_FE) != RESET) && ((cr3its & USART_CR3_EIE) != RESET))
  2376.     {
  2377.       huart->ErrorCode |= HAL_UART_ERROR_FE;
  2378.     }
  2379.  
  2380.     /* UART Over-Run interrupt occurred --------------------------------------*/
  2381.     if (((isrflags & USART_SR_ORE) != RESET) && (((cr1its & USART_CR1_RXNEIE) != RESET)
  2382.                                                  || ((cr3its & USART_CR3_EIE) != RESET)))
  2383.     {
  2384.       huart->ErrorCode |= HAL_UART_ERROR_ORE;
  2385.     }
  2386.  
  2387.     /* Call UART Error Call back function if need be --------------------------*/
  2388.     if (huart->ErrorCode != HAL_UART_ERROR_NONE)
  2389.     {
  2390.       /* UART in mode Receiver -----------------------------------------------*/
  2391.       if (((isrflags & USART_SR_RXNE) != RESET) && ((cr1its & USART_CR1_RXNEIE) != RESET))
  2392.       {
  2393.         UART_Receive_IT(huart);
  2394.       }
  2395.  
  2396.       /* If Overrun error occurs, or if any error occurs in DMA mode reception,
  2397.          consider error as blocking */
  2398.       dmarequest = HAL_IS_BIT_SET(huart->Instance->CR3, USART_CR3_DMAR);
  2399.       if (((huart->ErrorCode & HAL_UART_ERROR_ORE) != RESET) || dmarequest)
  2400.       {
  2401.         /* Blocking error : transfer is aborted
  2402.            Set the UART state ready to be able to start again the process,
  2403.            Disable Rx Interrupts, and disable Rx DMA request, if ongoing */
  2404.         UART_EndRxTransfer(huart);
  2405.  
  2406.         /* Disable the UART DMA Rx request if enabled */
  2407.         if (HAL_IS_BIT_SET(huart->Instance->CR3, USART_CR3_DMAR))
  2408.         {
  2409.           ATOMIC_CLEAR_BIT(huart->Instance->CR3, USART_CR3_DMAR);
  2410.  
  2411.           /* Abort the UART DMA Rx channel */
  2412.           if (huart->hdmarx != NULL)
  2413.           {
  2414.             /* Set the UART DMA Abort callback :
  2415.                will lead to call HAL_UART_ErrorCallback() at end of DMA abort procedure */
  2416.             huart->hdmarx->XferAbortCallback = UART_DMAAbortOnError;
  2417.             if (HAL_DMA_Abort_IT(huart->hdmarx) != HAL_OK)
  2418.             {
  2419.               /* Call Directly XferAbortCallback function in case of error */
  2420.               huart->hdmarx->XferAbortCallback(huart->hdmarx);
  2421.             }
  2422.           }
  2423.           else
  2424.           {
  2425.             /* Call user error callback */
  2426. #if (USE_HAL_UART_REGISTER_CALLBACKS == 1)
  2427.             /*Call registered error callback*/
  2428.             huart->ErrorCallback(huart);
  2429. #else
  2430.             /*Call legacy weak error callback*/
  2431.             HAL_UART_ErrorCallback(huart);
  2432. #endif /* USE_HAL_UART_REGISTER_CALLBACKS */
  2433.           }
  2434.         }
  2435.         else
  2436.         {
  2437.           /* Call user error callback */
  2438. #if (USE_HAL_UART_REGISTER_CALLBACKS == 1)
  2439.           /*Call registered error callback*/
  2440.           huart->ErrorCallback(huart);
  2441. #else
  2442.           /*Call legacy weak error callback*/
  2443.           HAL_UART_ErrorCallback(huart);
  2444. #endif /* USE_HAL_UART_REGISTER_CALLBACKS */
  2445.         }
  2446.       }
  2447.       else
  2448.       {
  2449.         /* Non Blocking error : transfer could go on.
  2450.            Error is notified to user through user error callback */
  2451. #if (USE_HAL_UART_REGISTER_CALLBACKS == 1)
  2452.         /*Call registered error callback*/
  2453.         huart->ErrorCallback(huart);
  2454. #else
  2455.         /*Call legacy weak error callback*/
  2456.         HAL_UART_ErrorCallback(huart);
  2457. #endif /* USE_HAL_UART_REGISTER_CALLBACKS */
  2458.  
  2459.         huart->ErrorCode = HAL_UART_ERROR_NONE;
  2460.       }
  2461.     }
  2462.     return;
  2463.   } /* End if some error occurs */
  2464.  
  2465.   /* Check current reception Mode :
  2466.      If Reception till IDLE event has been selected : */
  2467.   if ((huart->ReceptionType == HAL_UART_RECEPTION_TOIDLE)
  2468.       && ((isrflags & USART_SR_IDLE) != 0U)
  2469.       && ((cr1its & USART_SR_IDLE) != 0U))
  2470.   {
  2471.     __HAL_UART_CLEAR_IDLEFLAG(huart);
  2472.  
  2473.     /* Check if DMA mode is enabled in UART */
  2474.     if (HAL_IS_BIT_SET(huart->Instance->CR3, USART_CR3_DMAR))
  2475.     {
  2476.       /* DMA mode enabled */
  2477.       /* Check received length : If all expected data are received, do nothing,
  2478.          (DMA cplt callback will be called).
  2479.          Otherwise, if at least one data has already been received, IDLE event is to be notified to user */
  2480.       uint16_t nb_remaining_rx_data = (uint16_t) __HAL_DMA_GET_COUNTER(huart->hdmarx);
  2481.       if ((nb_remaining_rx_data > 0U)
  2482.           && (nb_remaining_rx_data < huart->RxXferSize))
  2483.       {
  2484.         /* Reception is not complete */
  2485.         huart->RxXferCount = nb_remaining_rx_data;
  2486.  
  2487.         /* In Normal mode, end DMA xfer and HAL UART Rx process*/
  2488.         if (huart->hdmarx->Init.Mode != DMA_CIRCULAR)
  2489.         {
  2490.           /* Disable PE and ERR (Frame error, noise error, overrun error) interrupts */
  2491.           ATOMIC_CLEAR_BIT(huart->Instance->CR1, USART_CR1_PEIE);
  2492.           ATOMIC_CLEAR_BIT(huart->Instance->CR3, USART_CR3_EIE);
  2493.  
  2494.           /* Disable the DMA transfer for the receiver request by resetting the DMAR bit
  2495.              in the UART CR3 register */
  2496.           ATOMIC_CLEAR_BIT(huart->Instance->CR3, USART_CR3_DMAR);
  2497.  
  2498.           /* At end of Rx process, restore huart->RxState to Ready */
  2499.           huart->RxState = HAL_UART_STATE_READY;
  2500.           huart->ReceptionType = HAL_UART_RECEPTION_STANDARD;
  2501.  
  2502.           ATOMIC_CLEAR_BIT(huart->Instance->CR1, USART_CR1_IDLEIE);
  2503.  
  2504.           /* Last bytes received, so no need as the abort is immediate */
  2505.           (void)HAL_DMA_Abort(huart->hdmarx);
  2506.         }
  2507.  
  2508.         /* Initialize type of RxEvent that correspond to RxEvent callback execution;
  2509.         In this case, Rx Event type is Idle Event */
  2510.         huart->RxEventType = HAL_UART_RXEVENT_IDLE;
  2511.  
  2512. #if (USE_HAL_UART_REGISTER_CALLBACKS == 1)
  2513.         /*Call registered Rx Event callback*/
  2514.         huart->RxEventCallback(huart, (huart->RxXferSize - huart->RxXferCount));
  2515. #else
  2516.         /*Call legacy weak Rx Event callback*/
  2517.         HAL_UARTEx_RxEventCallback(huart, (huart->RxXferSize - huart->RxXferCount));
  2518. #endif /* USE_HAL_UART_REGISTER_CALLBACKS */
  2519.       }
  2520.       return;
  2521.     }
  2522.     else
  2523.     {
  2524.       /* DMA mode not enabled */
  2525.       /* Check received length : If all expected data are received, do nothing.
  2526.          Otherwise, if at least one data has already been received, IDLE event is to be notified to user */
  2527.       uint16_t nb_rx_data = huart->RxXferSize - huart->RxXferCount;
  2528.       if ((huart->RxXferCount > 0U)
  2529.           && (nb_rx_data > 0U))
  2530.       {
  2531.         /* Disable the UART Parity Error Interrupt and RXNE interrupts */
  2532.         ATOMIC_CLEAR_BIT(huart->Instance->CR1, (USART_CR1_RXNEIE | USART_CR1_PEIE));
  2533.  
  2534.         /* Disable the UART Error Interrupt: (Frame error, noise error, overrun error) */
  2535.         ATOMIC_CLEAR_BIT(huart->Instance->CR3, USART_CR3_EIE);
  2536.  
  2537.         /* Rx process is completed, restore huart->RxState to Ready */
  2538.         huart->RxState = HAL_UART_STATE_READY;
  2539.         huart->ReceptionType = HAL_UART_RECEPTION_STANDARD;
  2540.  
  2541.         ATOMIC_CLEAR_BIT(huart->Instance->CR1, USART_CR1_IDLEIE);
  2542.  
  2543.         /* Initialize type of RxEvent that correspond to RxEvent callback execution;
  2544.            In this case, Rx Event type is Idle Event */
  2545.         huart->RxEventType = HAL_UART_RXEVENT_IDLE;
  2546.  
  2547. #if (USE_HAL_UART_REGISTER_CALLBACKS == 1)
  2548.         /*Call registered Rx complete callback*/
  2549.         huart->RxEventCallback(huart, nb_rx_data);
  2550. #else
  2551.         /*Call legacy weak Rx Event callback*/
  2552.         HAL_UARTEx_RxEventCallback(huart, nb_rx_data);
  2553. #endif /* USE_HAL_UART_REGISTER_CALLBACKS */
  2554.       }
  2555.       return;
  2556.     }
  2557.   }
  2558.  
  2559.   /* UART in mode Transmitter ------------------------------------------------*/
  2560.   if (((isrflags & USART_SR_TXE) != RESET) && ((cr1its & USART_CR1_TXEIE) != RESET))
  2561.   {
  2562.     UART_Transmit_IT(huart);
  2563.     return;
  2564.   }
  2565.  
  2566.   /* UART in mode Transmitter end --------------------------------------------*/
  2567.   if (((isrflags & USART_SR_TC) != RESET) && ((cr1its & USART_CR1_TCIE) != RESET))
  2568.   {
  2569.     UART_EndTransmit_IT(huart);
  2570.     return;
  2571.   }
  2572. }
  2573.  
  2574. /**
  2575.   * @brief  Tx Transfer completed callbacks.
  2576.   * @param  huart  Pointer to a UART_HandleTypeDef structure that contains
  2577.   *                the configuration information for the specified UART module.
  2578.   * @retval None
  2579.   */
  2580. __weak void HAL_UART_TxCpltCallback(UART_HandleTypeDef *huart)
  2581. {
  2582.   /* Prevent unused argument(s) compilation warning */
  2583.   UNUSED(huart);
  2584.   /* NOTE: This function should not be modified, when the callback is needed,
  2585.            the HAL_UART_TxCpltCallback could be implemented in the user file
  2586.    */
  2587. }
  2588.  
  2589. /**
  2590.   * @brief  Tx Half Transfer completed callbacks.
  2591.   * @param  huart  Pointer to a UART_HandleTypeDef structure that contains
  2592.   *                the configuration information for the specified UART module.
  2593.   * @retval None
  2594.   */
  2595. __weak void HAL_UART_TxHalfCpltCallback(UART_HandleTypeDef *huart)
  2596. {
  2597.   /* Prevent unused argument(s) compilation warning */
  2598.   UNUSED(huart);
  2599.   /* NOTE: This function should not be modified, when the callback is needed,
  2600.            the HAL_UART_TxHalfCpltCallback could be implemented in the user file
  2601.    */
  2602. }
  2603.  
  2604. /**
  2605.   * @brief  Rx Transfer completed callbacks.
  2606.   * @param  huart  Pointer to a UART_HandleTypeDef structure that contains
  2607.   *                the configuration information for the specified UART module.
  2608.   * @retval None
  2609.   */
  2610. __weak void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart)
  2611. {
  2612.   /* Prevent unused argument(s) compilation warning */
  2613.   UNUSED(huart);
  2614.   /* NOTE: This function should not be modified, when the callback is needed,
  2615.            the HAL_UART_RxCpltCallback could be implemented in the user file
  2616.    */
  2617. }
  2618.  
  2619. /**
  2620.   * @brief  Rx Half Transfer completed callbacks.
  2621.   * @param  huart  Pointer to a UART_HandleTypeDef structure that contains
  2622.   *                the configuration information for the specified UART module.
  2623.   * @retval None
  2624.   */
  2625. __weak void HAL_UART_RxHalfCpltCallback(UART_HandleTypeDef *huart)
  2626. {
  2627.   /* Prevent unused argument(s) compilation warning */
  2628.   UNUSED(huart);
  2629.   /* NOTE: This function should not be modified, when the callback is needed,
  2630.            the HAL_UART_RxHalfCpltCallback could be implemented in the user file
  2631.    */
  2632. }
  2633.  
  2634. /**
  2635.   * @brief  UART error callbacks.
  2636.   * @param  huart  Pointer to a UART_HandleTypeDef structure that contains
  2637.   *                the configuration information for the specified UART module.
  2638.   * @retval None
  2639.   */
  2640. __weak void HAL_UART_ErrorCallback(UART_HandleTypeDef *huart)
  2641. {
  2642.   /* Prevent unused argument(s) compilation warning */
  2643.   UNUSED(huart);
  2644.   /* NOTE: This function should not be modified, when the callback is needed,
  2645.            the HAL_UART_ErrorCallback could be implemented in the user file
  2646.    */
  2647. }
  2648.  
  2649. /**
  2650.   * @brief  UART Abort Complete callback.
  2651.   * @param  huart UART handle.
  2652.   * @retval None
  2653.   */
  2654. __weak void HAL_UART_AbortCpltCallback(UART_HandleTypeDef *huart)
  2655. {
  2656.   /* Prevent unused argument(s) compilation warning */
  2657.   UNUSED(huart);
  2658.  
  2659.   /* NOTE : This function should not be modified, when the callback is needed,
  2660.             the HAL_UART_AbortCpltCallback can be implemented in the user file.
  2661.    */
  2662. }
  2663.  
  2664. /**
  2665.   * @brief  UART Abort Complete callback.
  2666.   * @param  huart UART handle.
  2667.   * @retval None
  2668.   */
  2669. __weak void HAL_UART_AbortTransmitCpltCallback(UART_HandleTypeDef *huart)
  2670. {
  2671.   /* Prevent unused argument(s) compilation warning */
  2672.   UNUSED(huart);
  2673.  
  2674.   /* NOTE : This function should not be modified, when the callback is needed,
  2675.             the HAL_UART_AbortTransmitCpltCallback can be implemented in the user file.
  2676.    */
  2677. }
  2678.  
  2679. /**
  2680.   * @brief  UART Abort Receive Complete callback.
  2681.   * @param  huart UART handle.
  2682.   * @retval None
  2683.   */
  2684. __weak void HAL_UART_AbortReceiveCpltCallback(UART_HandleTypeDef *huart)
  2685. {
  2686.   /* Prevent unused argument(s) compilation warning */
  2687.   UNUSED(huart);
  2688.  
  2689.   /* NOTE : This function should not be modified, when the callback is needed,
  2690.             the HAL_UART_AbortReceiveCpltCallback can be implemented in the user file.
  2691.    */
  2692. }
  2693.  
  2694. /**
  2695.   * @brief  Reception Event Callback (Rx event notification called after use of advanced reception service).
  2696.   * @param  huart UART handle
  2697.   * @param  Size  Number of data available in application reception buffer (indicates a position in
  2698.   *               reception buffer until which, data are available)
  2699.   * @retval None
  2700.   */
  2701. __weak void HAL_UARTEx_RxEventCallback(UART_HandleTypeDef *huart, uint16_t Size)
  2702. {
  2703.   /* Prevent unused argument(s) compilation warning */
  2704.   UNUSED(huart);
  2705.   UNUSED(Size);
  2706.  
  2707.   /* NOTE : This function should not be modified, when the callback is needed,
  2708.             the HAL_UARTEx_RxEventCallback can be implemented in the user file.
  2709.    */
  2710. }
  2711.  
  2712. /**
  2713.   * @}
  2714.   */
  2715.  
  2716. /** @defgroup UART_Exported_Functions_Group3 Peripheral Control functions
  2717.   *  @brief   UART control functions
  2718.   *
  2719. @verbatim
  2720.   ==============================================================================
  2721.                       ##### Peripheral Control functions #####
  2722.   ==============================================================================
  2723.   [..]
  2724.     This subsection provides a set of functions allowing to control the UART:
  2725.     (+) HAL_LIN_SendBreak() API can be helpful to transmit the break character.
  2726.     (+) HAL_MultiProcessor_EnterMuteMode() API can be helpful to enter the UART in mute mode.
  2727.     (+) HAL_MultiProcessor_ExitMuteMode() API can be helpful to exit the UART mute mode by software.
  2728.     (+) HAL_HalfDuplex_EnableTransmitter() API to enable the UART transmitter and disables the UART receiver in Half Duplex mode
  2729.     (+) HAL_HalfDuplex_EnableReceiver() API to enable the UART receiver and disables the UART transmitter in Half Duplex mode
  2730.  
  2731. @endverbatim
  2732.   * @{
  2733.   */
  2734.  
  2735. /**
  2736.   * @brief  Transmits break characters.
  2737.   * @param  huart  Pointer to a UART_HandleTypeDef structure that contains
  2738.   *                the configuration information for the specified UART module.
  2739.   * @retval HAL status
  2740.   */
  2741. HAL_StatusTypeDef HAL_LIN_SendBreak(UART_HandleTypeDef *huart)
  2742. {
  2743.   /* Check the parameters */
  2744.   assert_param(IS_UART_INSTANCE(huart->Instance));
  2745.  
  2746.   /* Process Locked */
  2747.   __HAL_LOCK(huart);
  2748.  
  2749.   huart->gState = HAL_UART_STATE_BUSY;
  2750.  
  2751.   /* Send break characters */
  2752.   ATOMIC_SET_BIT(huart->Instance->CR1, USART_CR1_SBK);
  2753.  
  2754.   huart->gState = HAL_UART_STATE_READY;
  2755.  
  2756.   /* Process Unlocked */
  2757.   __HAL_UNLOCK(huart);
  2758.  
  2759.   return HAL_OK;
  2760. }
  2761.  
  2762. /**
  2763.   * @brief  Enters the UART in mute mode.
  2764.   * @param  huart  Pointer to a UART_HandleTypeDef structure that contains
  2765.   *                the configuration information for the specified UART module.
  2766.   * @retval HAL status
  2767.   */
  2768. HAL_StatusTypeDef HAL_MultiProcessor_EnterMuteMode(UART_HandleTypeDef *huart)
  2769. {
  2770.   /* Check the parameters */
  2771.   assert_param(IS_UART_INSTANCE(huart->Instance));
  2772.  
  2773.   /* Process Locked */
  2774.   __HAL_LOCK(huart);
  2775.  
  2776.   huart->gState = HAL_UART_STATE_BUSY;
  2777.  
  2778.   /* Enable the USART mute mode  by setting the RWU bit in the CR1 register */
  2779.   ATOMIC_SET_BIT(huart->Instance->CR1, USART_CR1_RWU);
  2780.  
  2781.   huart->gState = HAL_UART_STATE_READY;
  2782.   huart->RxEventType = HAL_UART_RXEVENT_TC;
  2783.  
  2784.   /* Process Unlocked */
  2785.   __HAL_UNLOCK(huart);
  2786.  
  2787.   return HAL_OK;
  2788. }
  2789.  
  2790. /**
  2791.   * @brief  Exits the UART mute mode: wake up software.
  2792.   * @param  huart  Pointer to a UART_HandleTypeDef structure that contains
  2793.   *                the configuration information for the specified UART module.
  2794.   * @retval HAL status
  2795.   */
  2796. HAL_StatusTypeDef HAL_MultiProcessor_ExitMuteMode(UART_HandleTypeDef *huart)
  2797. {
  2798.   /* Check the parameters */
  2799.   assert_param(IS_UART_INSTANCE(huart->Instance));
  2800.  
  2801.   /* Process Locked */
  2802.   __HAL_LOCK(huart);
  2803.  
  2804.   huart->gState = HAL_UART_STATE_BUSY;
  2805.  
  2806.   /* Disable the USART mute mode by clearing the RWU bit in the CR1 register */
  2807.   ATOMIC_CLEAR_BIT(huart->Instance->CR1, USART_CR1_RWU);
  2808.  
  2809.   huart->gState = HAL_UART_STATE_READY;
  2810.   huart->RxEventType = HAL_UART_RXEVENT_TC;
  2811.  
  2812.   /* Process Unlocked */
  2813.   __HAL_UNLOCK(huart);
  2814.  
  2815.   return HAL_OK;
  2816. }
  2817.  
  2818. /**
  2819.   * @brief  Enables the UART transmitter and disables the UART receiver.
  2820.   * @param  huart  Pointer to a UART_HandleTypeDef structure that contains
  2821.   *                the configuration information for the specified UART module.
  2822.   * @retval HAL status
  2823.   */
  2824. HAL_StatusTypeDef HAL_HalfDuplex_EnableTransmitter(UART_HandleTypeDef *huart)
  2825. {
  2826.   uint32_t tmpreg = 0x00U;
  2827.  
  2828.   /* Process Locked */
  2829.   __HAL_LOCK(huart);
  2830.  
  2831.   huart->gState = HAL_UART_STATE_BUSY;
  2832.  
  2833.   /*-------------------------- USART CR1 Configuration -----------------------*/
  2834.   tmpreg = huart->Instance->CR1;
  2835.  
  2836.   /* Clear TE and RE bits */
  2837.   tmpreg &= (uint32_t)~((uint32_t)(USART_CR1_TE | USART_CR1_RE));
  2838.  
  2839.   /* Enable the USART's transmit interface by setting the TE bit in the USART CR1 register */
  2840.   tmpreg |= (uint32_t)USART_CR1_TE;
  2841.  
  2842.   /* Write to USART CR1 */
  2843.   WRITE_REG(huart->Instance->CR1, (uint32_t)tmpreg);
  2844.  
  2845.   huart->gState = HAL_UART_STATE_READY;
  2846.  
  2847.   /* Process Unlocked */
  2848.   __HAL_UNLOCK(huart);
  2849.  
  2850.   return HAL_OK;
  2851. }
  2852.  
  2853. /**
  2854.   * @brief  Enables the UART receiver and disables the UART transmitter.
  2855.   * @param  huart  Pointer to a UART_HandleTypeDef structure that contains
  2856.   *                the configuration information for the specified UART module.
  2857.   * @retval HAL status
  2858.   */
  2859. HAL_StatusTypeDef HAL_HalfDuplex_EnableReceiver(UART_HandleTypeDef *huart)
  2860. {
  2861.   uint32_t tmpreg = 0x00U;
  2862.  
  2863.   /* Process Locked */
  2864.   __HAL_LOCK(huart);
  2865.  
  2866.   huart->gState = HAL_UART_STATE_BUSY;
  2867.  
  2868.   /*-------------------------- USART CR1 Configuration -----------------------*/
  2869.   tmpreg = huart->Instance->CR1;
  2870.  
  2871.   /* Clear TE and RE bits */
  2872.   tmpreg &= (uint32_t)~((uint32_t)(USART_CR1_TE | USART_CR1_RE));
  2873.  
  2874.   /* Enable the USART's receive interface by setting the RE bit in the USART CR1 register */
  2875.   tmpreg |= (uint32_t)USART_CR1_RE;
  2876.  
  2877.   /* Write to USART CR1 */
  2878.   WRITE_REG(huart->Instance->CR1, (uint32_t)tmpreg);
  2879.  
  2880.   huart->gState = HAL_UART_STATE_READY;
  2881.  
  2882.   /* Process Unlocked */
  2883.   __HAL_UNLOCK(huart);
  2884.  
  2885.   return HAL_OK;
  2886. }
  2887.  
  2888. /**
  2889.   * @}
  2890.   */
  2891.  
  2892. /** @defgroup UART_Exported_Functions_Group4 Peripheral State and Errors functions
  2893.   *  @brief   UART State and Errors functions
  2894.   *
  2895. @verbatim
  2896.   ==============================================================================
  2897.                  ##### Peripheral State and Errors functions #####
  2898.   ==============================================================================
  2899.  [..]
  2900.    This subsection provides a set of functions allowing to return the State of
  2901.    UART communication process, return Peripheral Errors occurred during communication
  2902.    process
  2903.    (+) HAL_UART_GetState() API can be helpful to check in run-time the state of the UART peripheral.
  2904.    (+) HAL_UART_GetError() check in run-time errors that could be occurred during communication.
  2905.  
  2906. @endverbatim
  2907.   * @{
  2908.   */
  2909.  
  2910. /**
  2911.   * @brief  Returns the UART state.
  2912.   * @param  huart  Pointer to a UART_HandleTypeDef structure that contains
  2913.   *                the configuration information for the specified UART module.
  2914.   * @retval HAL state
  2915.   */
  2916. HAL_UART_StateTypeDef HAL_UART_GetState(const UART_HandleTypeDef *huart)
  2917. {
  2918.   uint32_t temp1 = 0x00U, temp2 = 0x00U;
  2919.   temp1 = huart->gState;
  2920.   temp2 = huart->RxState;
  2921.  
  2922.   return (HAL_UART_StateTypeDef)(temp1 | temp2);
  2923. }
  2924.  
  2925. /**
  2926.   * @brief  Return the UART error code
  2927.   * @param  huart Pointer to a UART_HandleTypeDef structure that contains
  2928.   *               the configuration information for the specified UART.
  2929.   * @retval UART Error Code
  2930.   */
  2931. uint32_t HAL_UART_GetError(const UART_HandleTypeDef *huart)
  2932. {
  2933.   return huart->ErrorCode;
  2934. }
  2935.  
  2936. /**
  2937.   * @}
  2938.   */
  2939.  
  2940. /**
  2941.   * @}
  2942.   */
  2943.  
  2944. /** @defgroup UART_Private_Functions UART Private Functions
  2945.   * @{
  2946.   */
  2947.  
  2948. /**
  2949.   * @brief  Initialize the callbacks to their default values.
  2950.   * @param  huart UART handle.
  2951.   * @retval none
  2952.   */
  2953. #if (USE_HAL_UART_REGISTER_CALLBACKS == 1)
  2954. void UART_InitCallbacksToDefault(UART_HandleTypeDef *huart)
  2955. {
  2956.   /* Init the UART Callback settings */
  2957.   huart->TxHalfCpltCallback        = HAL_UART_TxHalfCpltCallback;        /* Legacy weak TxHalfCpltCallback        */
  2958.   huart->TxCpltCallback            = HAL_UART_TxCpltCallback;            /* Legacy weak TxCpltCallback            */
  2959.   huart->RxHalfCpltCallback        = HAL_UART_RxHalfCpltCallback;        /* Legacy weak RxHalfCpltCallback        */
  2960.   huart->RxCpltCallback            = HAL_UART_RxCpltCallback;            /* Legacy weak RxCpltCallback            */
  2961.   huart->ErrorCallback             = HAL_UART_ErrorCallback;             /* Legacy weak ErrorCallback             */
  2962.   huart->AbortCpltCallback         = HAL_UART_AbortCpltCallback;         /* Legacy weak AbortCpltCallback         */
  2963.   huart->AbortTransmitCpltCallback = HAL_UART_AbortTransmitCpltCallback; /* Legacy weak AbortTransmitCpltCallback */
  2964.   huart->AbortReceiveCpltCallback  = HAL_UART_AbortReceiveCpltCallback;  /* Legacy weak AbortReceiveCpltCallback  */
  2965.   huart->RxEventCallback           = HAL_UARTEx_RxEventCallback;         /* Legacy weak RxEventCallback           */
  2966.  
  2967. }
  2968. #endif /* USE_HAL_UART_REGISTER_CALLBACKS */
  2969.  
  2970. /**
  2971.   * @brief  DMA UART transmit process complete callback.
  2972.   * @param  hdma  Pointer to a DMA_HandleTypeDef structure that contains
  2973.   *               the configuration information for the specified DMA module.
  2974.   * @retval None
  2975.   */
  2976. static void UART_DMATransmitCplt(DMA_HandleTypeDef *hdma)
  2977. {
  2978.   UART_HandleTypeDef *huart = (UART_HandleTypeDef *)((DMA_HandleTypeDef *)hdma)->Parent;
  2979.   /* DMA Normal mode*/
  2980.   if ((hdma->Instance->CCR & DMA_CCR_CIRC) == 0U)
  2981.   {
  2982.     huart->TxXferCount = 0x00U;
  2983.  
  2984.     /* Disable the DMA transfer for transmit request by setting the DMAT bit
  2985.        in the UART CR3 register */
  2986.     ATOMIC_CLEAR_BIT(huart->Instance->CR3, USART_CR3_DMAT);
  2987.  
  2988.     /* Enable the UART Transmit Complete Interrupt */
  2989.     ATOMIC_SET_BIT(huart->Instance->CR1, USART_CR1_TCIE);
  2990.  
  2991.   }
  2992.   /* DMA Circular mode */
  2993.   else
  2994.   {
  2995. #if (USE_HAL_UART_REGISTER_CALLBACKS == 1)
  2996.     /*Call registered Tx complete callback*/
  2997.     huart->TxCpltCallback(huart);
  2998. #else
  2999.     /*Call legacy weak Tx complete callback*/
  3000.     HAL_UART_TxCpltCallback(huart);
  3001. #endif /* USE_HAL_UART_REGISTER_CALLBACKS */
  3002.   }
  3003. }
  3004.  
  3005. /**
  3006.   * @brief DMA UART transmit process half complete callback
  3007.   * @param  hdma  Pointer to a DMA_HandleTypeDef structure that contains
  3008.   *               the configuration information for the specified DMA module.
  3009.   * @retval None
  3010.   */
  3011. static void UART_DMATxHalfCplt(DMA_HandleTypeDef *hdma)
  3012. {
  3013.   UART_HandleTypeDef *huart = (UART_HandleTypeDef *)((DMA_HandleTypeDef *)hdma)->Parent;
  3014.  
  3015. #if (USE_HAL_UART_REGISTER_CALLBACKS == 1)
  3016.   /*Call registered Tx complete callback*/
  3017.   huart->TxHalfCpltCallback(huart);
  3018. #else
  3019.   /*Call legacy weak Tx complete callback*/
  3020.   HAL_UART_TxHalfCpltCallback(huart);
  3021. #endif /* USE_HAL_UART_REGISTER_CALLBACKS */
  3022. }
  3023.  
  3024. /**
  3025.   * @brief  DMA UART receive process complete callback.
  3026.   * @param  hdma  Pointer to a DMA_HandleTypeDef structure that contains
  3027.   *               the configuration information for the specified DMA module.
  3028.   * @retval None
  3029.   */
  3030. static void UART_DMAReceiveCplt(DMA_HandleTypeDef *hdma)
  3031. {
  3032.   UART_HandleTypeDef *huart = (UART_HandleTypeDef *)((DMA_HandleTypeDef *)hdma)->Parent;
  3033.  
  3034.   /* DMA Normal mode*/
  3035.   if ((hdma->Instance->CCR & DMA_CCR_CIRC) == 0U)
  3036.   {
  3037.     huart->RxXferCount = 0U;
  3038.  
  3039.     /* Disable RXNE, PE and ERR (Frame error, noise error, overrun error) interrupts */
  3040.     ATOMIC_CLEAR_BIT(huart->Instance->CR1, USART_CR1_PEIE);
  3041.     ATOMIC_CLEAR_BIT(huart->Instance->CR3, USART_CR3_EIE);
  3042.  
  3043.     /* Disable the DMA transfer for the receiver request by setting the DMAR bit
  3044.        in the UART CR3 register */
  3045.     ATOMIC_CLEAR_BIT(huart->Instance->CR3, USART_CR3_DMAR);
  3046.  
  3047.     /* At end of Rx process, restore huart->RxState to Ready */
  3048.     huart->RxState = HAL_UART_STATE_READY;
  3049.  
  3050.     /* If Reception till IDLE event has been selected, Disable IDLE Interrupt */
  3051.     if (huart->ReceptionType == HAL_UART_RECEPTION_TOIDLE)
  3052.     {
  3053.       ATOMIC_CLEAR_BIT(huart->Instance->CR1, USART_CR1_IDLEIE);
  3054.     }
  3055.   }
  3056.  
  3057.   /* Initialize type of RxEvent that correspond to RxEvent callback execution;
  3058.    In this case, Rx Event type is Transfer Complete */
  3059.   huart->RxEventType = HAL_UART_RXEVENT_TC;
  3060.  
  3061.   /* Check current reception Mode :
  3062.      If Reception till IDLE event has been selected : use Rx Event callback */
  3063.   if (huart->ReceptionType == HAL_UART_RECEPTION_TOIDLE)
  3064.   {
  3065. #if (USE_HAL_UART_REGISTER_CALLBACKS == 1)
  3066.     /*Call registered Rx Event callback*/
  3067.     huart->RxEventCallback(huart, huart->RxXferSize);
  3068. #else
  3069.     /*Call legacy weak Rx Event callback*/
  3070.     HAL_UARTEx_RxEventCallback(huart, huart->RxXferSize);
  3071. #endif /* USE_HAL_UART_REGISTER_CALLBACKS */
  3072.   }
  3073.   else
  3074.   {
  3075.     /* In other cases : use Rx Complete callback */
  3076. #if (USE_HAL_UART_REGISTER_CALLBACKS == 1)
  3077.     /*Call registered Rx complete callback*/
  3078.     huart->RxCpltCallback(huart);
  3079. #else
  3080.     /*Call legacy weak Rx complete callback*/
  3081.     HAL_UART_RxCpltCallback(huart);
  3082. #endif /* USE_HAL_UART_REGISTER_CALLBACKS */
  3083.   }
  3084. }
  3085.  
  3086. /**
  3087.   * @brief DMA UART receive process half complete callback
  3088.   * @param  hdma  Pointer to a DMA_HandleTypeDef structure that contains
  3089.   *               the configuration information for the specified DMA module.
  3090.   * @retval None
  3091.   */
  3092. static void UART_DMARxHalfCplt(DMA_HandleTypeDef *hdma)
  3093. {
  3094.   UART_HandleTypeDef *huart = (UART_HandleTypeDef *)((DMA_HandleTypeDef *)hdma)->Parent;
  3095.  
  3096.   /* Initialize type of RxEvent that correspond to RxEvent callback execution;
  3097.      In this case, Rx Event type is Half Transfer */
  3098.   huart->RxEventType = HAL_UART_RXEVENT_HT;
  3099.  
  3100.   /* Check current reception Mode :
  3101.      If Reception till IDLE event has been selected : use Rx Event callback */
  3102.   if (huart->ReceptionType == HAL_UART_RECEPTION_TOIDLE)
  3103.   {
  3104. #if (USE_HAL_UART_REGISTER_CALLBACKS == 1)
  3105.     /*Call registered Rx Event callback*/
  3106.     huart->RxEventCallback(huart, huart->RxXferSize / 2U);
  3107. #else
  3108.     /*Call legacy weak Rx Event callback*/
  3109.     HAL_UARTEx_RxEventCallback(huart, huart->RxXferSize / 2U);
  3110. #endif /* USE_HAL_UART_REGISTER_CALLBACKS */
  3111.   }
  3112.   else
  3113.   {
  3114.     /* In other cases : use Rx Half Complete callback */
  3115. #if (USE_HAL_UART_REGISTER_CALLBACKS == 1)
  3116.     /*Call registered Rx Half complete callback*/
  3117.     huart->RxHalfCpltCallback(huart);
  3118. #else
  3119.     /*Call legacy weak Rx Half complete callback*/
  3120.     HAL_UART_RxHalfCpltCallback(huart);
  3121. #endif /* USE_HAL_UART_REGISTER_CALLBACKS */
  3122.   }
  3123. }
  3124.  
  3125. /**
  3126.   * @brief  DMA UART communication error callback.
  3127.   * @param  hdma  Pointer to a DMA_HandleTypeDef structure that contains
  3128.   *               the configuration information for the specified DMA module.
  3129.   * @retval None
  3130.   */
  3131. static void UART_DMAError(DMA_HandleTypeDef *hdma)
  3132. {
  3133.   uint32_t dmarequest = 0x00U;
  3134.   UART_HandleTypeDef *huart = (UART_HandleTypeDef *)((DMA_HandleTypeDef *)hdma)->Parent;
  3135.  
  3136.   /* Stop UART DMA Tx request if ongoing */
  3137.   dmarequest = HAL_IS_BIT_SET(huart->Instance->CR3, USART_CR3_DMAT);
  3138.   if ((huart->gState == HAL_UART_STATE_BUSY_TX) && dmarequest)
  3139.   {
  3140.     huart->TxXferCount = 0x00U;
  3141.     UART_EndTxTransfer(huart);
  3142.   }
  3143.  
  3144.   /* Stop UART DMA Rx request if ongoing */
  3145.   dmarequest = HAL_IS_BIT_SET(huart->Instance->CR3, USART_CR3_DMAR);
  3146.   if ((huart->RxState == HAL_UART_STATE_BUSY_RX) && dmarequest)
  3147.   {
  3148.     huart->RxXferCount = 0x00U;
  3149.     UART_EndRxTransfer(huart);
  3150.   }
  3151.  
  3152.   huart->ErrorCode |= HAL_UART_ERROR_DMA;
  3153. #if (USE_HAL_UART_REGISTER_CALLBACKS == 1)
  3154.   /*Call registered error callback*/
  3155.   huart->ErrorCallback(huart);
  3156. #else
  3157.   /*Call legacy weak error callback*/
  3158.   HAL_UART_ErrorCallback(huart);
  3159. #endif /* USE_HAL_UART_REGISTER_CALLBACKS */
  3160. }
  3161.  
  3162. /**
  3163.   * @brief  This function handles UART Communication Timeout. It waits
  3164.   *         until a flag is no longer in the specified status.
  3165.   * @param  huart  Pointer to a UART_HandleTypeDef structure that contains
  3166.   *                the configuration information for the specified UART module.
  3167.   * @param  Flag specifies the UART flag to check.
  3168.   * @param  Status The actual Flag status (SET or RESET).
  3169.   * @param  Tickstart Tick start value
  3170.   * @param  Timeout Timeout duration
  3171.   * @retval HAL status
  3172.   */
  3173. static HAL_StatusTypeDef UART_WaitOnFlagUntilTimeout(UART_HandleTypeDef *huart, uint32_t Flag, FlagStatus Status,
  3174.                                                      uint32_t Tickstart, uint32_t Timeout)
  3175. {
  3176.   /* Wait until flag is set */
  3177.   while ((__HAL_UART_GET_FLAG(huart, Flag) ? SET : RESET) == Status)
  3178.   {
  3179.     /* Check for the Timeout */
  3180.     if (Timeout != HAL_MAX_DELAY)
  3181.     {
  3182.       if ((Timeout == 0U) || ((HAL_GetTick() - Tickstart) > Timeout))
  3183.       {
  3184.         /* Disable TXE, RXNE, PE and ERR (Frame error, noise error, overrun error) interrupts for the interrupt process */
  3185.         ATOMIC_CLEAR_BIT(huart->Instance->CR1, (USART_CR1_RXNEIE | USART_CR1_PEIE | USART_CR1_TXEIE));
  3186.         ATOMIC_CLEAR_BIT(huart->Instance->CR3, USART_CR3_EIE);
  3187.  
  3188.         huart->gState  = HAL_UART_STATE_READY;
  3189.         huart->RxState = HAL_UART_STATE_READY;
  3190.  
  3191.         /* Process Unlocked */
  3192.         __HAL_UNLOCK(huart);
  3193.  
  3194.         return HAL_TIMEOUT;
  3195.       }
  3196.     }
  3197.   }
  3198.   return HAL_OK;
  3199. }
  3200.  
  3201. /**
  3202.   * @brief  Start Receive operation in interrupt mode.
  3203.   * @note   This function could be called by all HAL UART API providing reception in Interrupt mode.
  3204.   * @note   When calling this function, parameters validity is considered as already checked,
  3205.   *         i.e. Rx State, buffer address, ...
  3206.   *         UART Handle is assumed as Locked.
  3207.   * @param  huart UART handle.
  3208.   * @param  pData Pointer to data buffer (u8 or u16 data elements).
  3209.   * @param  Size  Amount of data elements (u8 or u16) to be received.
  3210.   * @retval HAL status
  3211.   */
  3212. HAL_StatusTypeDef UART_Start_Receive_IT(UART_HandleTypeDef *huart, uint8_t *pData, uint16_t Size)
  3213. {
  3214.   huart->pRxBuffPtr = pData;
  3215.   huart->RxXferSize = Size;
  3216.   huart->RxXferCount = Size;
  3217.  
  3218.   huart->ErrorCode = HAL_UART_ERROR_NONE;
  3219.   huart->RxState = HAL_UART_STATE_BUSY_RX;
  3220.  
  3221.   if (huart->Init.Parity != UART_PARITY_NONE)
  3222.   {
  3223.     /* Enable the UART Parity Error Interrupt */
  3224.     __HAL_UART_ENABLE_IT(huart, UART_IT_PE);
  3225.   }
  3226.  
  3227.   /* Enable the UART Error Interrupt: (Frame error, noise error, overrun error) */
  3228.   __HAL_UART_ENABLE_IT(huart, UART_IT_ERR);
  3229.  
  3230.   /* Enable the UART Data Register not empty Interrupt */
  3231.   __HAL_UART_ENABLE_IT(huart, UART_IT_RXNE);
  3232.  
  3233.   return HAL_OK;
  3234. }
  3235.  
  3236. /**
  3237.   * @brief  Start Receive operation in DMA mode.
  3238.   * @note   This function could be called by all HAL UART API providing reception in DMA mode.
  3239.   * @note   When calling this function, parameters validity is considered as already checked,
  3240.   *         i.e. Rx State, buffer address, ...
  3241.   *         UART Handle is assumed as Locked.
  3242.   * @param  huart UART handle.
  3243.   * @param  pData Pointer to data buffer (u8 or u16 data elements).
  3244.   * @param  Size  Amount of data elements (u8 or u16) to be received.
  3245.   * @retval HAL status
  3246.   */
  3247. HAL_StatusTypeDef UART_Start_Receive_DMA(UART_HandleTypeDef *huart, uint8_t *pData, uint16_t Size)
  3248. {
  3249.   uint32_t *tmp;
  3250.  
  3251.   huart->pRxBuffPtr = pData;
  3252.   huart->RxXferSize = Size;
  3253.  
  3254.   huart->ErrorCode = HAL_UART_ERROR_NONE;
  3255.   huart->RxState = HAL_UART_STATE_BUSY_RX;
  3256.  
  3257.   /* Set the UART DMA transfer complete callback */
  3258.   huart->hdmarx->XferCpltCallback = UART_DMAReceiveCplt;
  3259.  
  3260.   /* Set the UART DMA Half transfer complete callback */
  3261.   huart->hdmarx->XferHalfCpltCallback = UART_DMARxHalfCplt;
  3262.  
  3263.   /* Set the DMA error callback */
  3264.   huart->hdmarx->XferErrorCallback = UART_DMAError;
  3265.  
  3266.   /* Set the DMA abort callback */
  3267.   huart->hdmarx->XferAbortCallback = NULL;
  3268.  
  3269.   /* Enable the DMA stream */
  3270.   tmp = (uint32_t *)&pData;
  3271.   HAL_DMA_Start_IT(huart->hdmarx, (uint32_t)&huart->Instance->DR, *(uint32_t *)tmp, Size);
  3272.  
  3273.   /* Clear the Overrun flag just before enabling the DMA Rx request: can be mandatory for the second transfer */
  3274.   __HAL_UART_CLEAR_OREFLAG(huart);
  3275.  
  3276.   if (huart->Init.Parity != UART_PARITY_NONE)
  3277.   {
  3278.     /* Enable the UART Parity Error Interrupt */
  3279.     ATOMIC_SET_BIT(huart->Instance->CR1, USART_CR1_PEIE);
  3280.   }
  3281.  
  3282.   /* Enable the UART Error Interrupt: (Frame error, noise error, overrun error) */
  3283.   ATOMIC_SET_BIT(huart->Instance->CR3, USART_CR3_EIE);
  3284.  
  3285.   /* Enable the DMA transfer for the receiver request by setting the DMAR bit
  3286.   in the UART CR3 register */
  3287.   ATOMIC_SET_BIT(huart->Instance->CR3, USART_CR3_DMAR);
  3288.  
  3289.   return HAL_OK;
  3290. }
  3291.  
  3292. /**
  3293.   * @brief  End ongoing Tx transfer on UART peripheral (following error detection or Transmit completion).
  3294.   * @param  huart UART handle.
  3295.   * @retval None
  3296.   */
  3297. static void UART_EndTxTransfer(UART_HandleTypeDef *huart)
  3298. {
  3299.   /* Disable TXEIE and TCIE interrupts */
  3300.   ATOMIC_CLEAR_BIT(huart->Instance->CR1, (USART_CR1_TXEIE | USART_CR1_TCIE));
  3301.  
  3302.   /* At end of Tx process, restore huart->gState to Ready */
  3303.   huart->gState = HAL_UART_STATE_READY;
  3304. }
  3305.  
  3306. /**
  3307.   * @brief  End ongoing Rx transfer on UART peripheral (following error detection or Reception completion).
  3308.   * @param  huart UART handle.
  3309.   * @retval None
  3310.   */
  3311. static void UART_EndRxTransfer(UART_HandleTypeDef *huart)
  3312. {
  3313.   /* Disable RXNE, PE and ERR (Frame error, noise error, overrun error) interrupts */
  3314.   ATOMIC_CLEAR_BIT(huart->Instance->CR1, (USART_CR1_RXNEIE | USART_CR1_PEIE));
  3315.   ATOMIC_CLEAR_BIT(huart->Instance->CR3, USART_CR3_EIE);
  3316.  
  3317.   /* In case of reception waiting for IDLE event, disable also the IDLE IE interrupt source */
  3318.   if (huart->ReceptionType == HAL_UART_RECEPTION_TOIDLE)
  3319.   {
  3320.     ATOMIC_CLEAR_BIT(huart->Instance->CR1, USART_CR1_IDLEIE);
  3321.   }
  3322.  
  3323.   /* At end of Rx process, restore huart->RxState to Ready */
  3324.   huart->RxState = HAL_UART_STATE_READY;
  3325.   huart->ReceptionType = HAL_UART_RECEPTION_STANDARD;
  3326. }
  3327.  
  3328. /**
  3329.   * @brief  DMA UART communication abort callback, when initiated by HAL services on Error
  3330.   *         (To be called at end of DMA Abort procedure following error occurrence).
  3331.   * @param  hdma  Pointer to a DMA_HandleTypeDef structure that contains
  3332.   *               the configuration information for the specified DMA module.
  3333.   * @retval None
  3334.   */
  3335. static void UART_DMAAbortOnError(DMA_HandleTypeDef *hdma)
  3336. {
  3337.   UART_HandleTypeDef *huart = (UART_HandleTypeDef *)((DMA_HandleTypeDef *)hdma)->Parent;
  3338.   huart->RxXferCount = 0x00U;
  3339.   huart->TxXferCount = 0x00U;
  3340.  
  3341. #if (USE_HAL_UART_REGISTER_CALLBACKS == 1)
  3342.   /*Call registered error callback*/
  3343.   huart->ErrorCallback(huart);
  3344. #else
  3345.   /*Call legacy weak error callback*/
  3346.   HAL_UART_ErrorCallback(huart);
  3347. #endif /* USE_HAL_UART_REGISTER_CALLBACKS */
  3348. }
  3349.  
  3350. /**
  3351.   * @brief  DMA UART Tx communication abort callback, when initiated by user
  3352.   *         (To be called at end of DMA Tx Abort procedure following user abort request).
  3353.   * @note   When this callback is executed, User Abort complete call back is called only if no
  3354.   *         Abort still ongoing for Rx DMA Handle.
  3355.   * @param  hdma  Pointer to a DMA_HandleTypeDef structure that contains
  3356.   *               the configuration information for the specified DMA module.
  3357.   * @retval None
  3358.   */
  3359. static void UART_DMATxAbortCallback(DMA_HandleTypeDef *hdma)
  3360. {
  3361.   UART_HandleTypeDef *huart = (UART_HandleTypeDef *)((DMA_HandleTypeDef *)hdma)->Parent;
  3362.  
  3363.   huart->hdmatx->XferAbortCallback = NULL;
  3364.  
  3365.   /* Check if an Abort process is still ongoing */
  3366.   if (huart->hdmarx != NULL)
  3367.   {
  3368.     if (huart->hdmarx->XferAbortCallback != NULL)
  3369.     {
  3370.       return;
  3371.     }
  3372.   }
  3373.  
  3374.   /* No Abort process still ongoing : All DMA channels are aborted, call user Abort Complete callback */
  3375.   huart->TxXferCount = 0x00U;
  3376.   huart->RxXferCount = 0x00U;
  3377.  
  3378.   /* Reset ErrorCode */
  3379.   huart->ErrorCode = HAL_UART_ERROR_NONE;
  3380.  
  3381.   /* Restore huart->gState and huart->RxState to Ready */
  3382.   huart->gState  = HAL_UART_STATE_READY;
  3383.   huart->RxState = HAL_UART_STATE_READY;
  3384.   huart->ReceptionType = HAL_UART_RECEPTION_STANDARD;
  3385.  
  3386.   /* Call user Abort complete callback */
  3387. #if (USE_HAL_UART_REGISTER_CALLBACKS == 1)
  3388.   /* Call registered Abort complete callback */
  3389.   huart->AbortCpltCallback(huart);
  3390. #else
  3391.   /* Call legacy weak Abort complete callback */
  3392.   HAL_UART_AbortCpltCallback(huart);
  3393. #endif /* USE_HAL_UART_REGISTER_CALLBACKS */
  3394. }
  3395.  
  3396. /**
  3397.   * @brief  DMA UART Rx communication abort callback, when initiated by user
  3398.   *         (To be called at end of DMA Rx Abort procedure following user abort request).
  3399.   * @note   When this callback is executed, User Abort complete call back is called only if no
  3400.   *         Abort still ongoing for Tx DMA Handle.
  3401.   * @param  hdma  Pointer to a DMA_HandleTypeDef structure that contains
  3402.   *               the configuration information for the specified DMA module.
  3403.   * @retval None
  3404.   */
  3405. static void UART_DMARxAbortCallback(DMA_HandleTypeDef *hdma)
  3406. {
  3407.   UART_HandleTypeDef *huart = (UART_HandleTypeDef *)((DMA_HandleTypeDef *)hdma)->Parent;
  3408.  
  3409.   huart->hdmarx->XferAbortCallback = NULL;
  3410.  
  3411.   /* Check if an Abort process is still ongoing */
  3412.   if (huart->hdmatx != NULL)
  3413.   {
  3414.     if (huart->hdmatx->XferAbortCallback != NULL)
  3415.     {
  3416.       return;
  3417.     }
  3418.   }
  3419.  
  3420.   /* No Abort process still ongoing : All DMA channels are aborted, call user Abort Complete callback */
  3421.   huart->TxXferCount = 0x00U;
  3422.   huart->RxXferCount = 0x00U;
  3423.  
  3424.   /* Reset ErrorCode */
  3425.   huart->ErrorCode = HAL_UART_ERROR_NONE;
  3426.  
  3427.   /* Restore huart->gState and huart->RxState to Ready */
  3428.   huart->gState  = HAL_UART_STATE_READY;
  3429.   huart->RxState = HAL_UART_STATE_READY;
  3430.   huart->ReceptionType = HAL_UART_RECEPTION_STANDARD;
  3431.  
  3432.   /* Call user Abort complete callback */
  3433. #if (USE_HAL_UART_REGISTER_CALLBACKS == 1)
  3434.   /* Call registered Abort complete callback */
  3435.   huart->AbortCpltCallback(huart);
  3436. #else
  3437.   /* Call legacy weak Abort complete callback */
  3438.   HAL_UART_AbortCpltCallback(huart);
  3439. #endif /* USE_HAL_UART_REGISTER_CALLBACKS */
  3440. }
  3441.  
  3442. /**
  3443.   * @brief  DMA UART Tx communication abort callback, when initiated by user by a call to
  3444.   *         HAL_UART_AbortTransmit_IT API (Abort only Tx transfer)
  3445.   *         (This callback is executed at end of DMA Tx Abort procedure following user abort request,
  3446.   *         and leads to user Tx Abort Complete callback execution).
  3447.   * @param  hdma  Pointer to a DMA_HandleTypeDef structure that contains
  3448.   *               the configuration information for the specified DMA module.
  3449.   * @retval None
  3450.   */
  3451. static void UART_DMATxOnlyAbortCallback(DMA_HandleTypeDef *hdma)
  3452. {
  3453.   UART_HandleTypeDef *huart = (UART_HandleTypeDef *)((DMA_HandleTypeDef *)hdma)->Parent;
  3454.  
  3455.   huart->TxXferCount = 0x00U;
  3456.  
  3457.   /* Restore huart->gState to Ready */
  3458.   huart->gState = HAL_UART_STATE_READY;
  3459.  
  3460.   /* Call user Abort complete callback */
  3461. #if (USE_HAL_UART_REGISTER_CALLBACKS == 1)
  3462.   /* Call registered Abort Transmit Complete Callback */
  3463.   huart->AbortTransmitCpltCallback(huart);
  3464. #else
  3465.   /* Call legacy weak Abort Transmit Complete Callback */
  3466.   HAL_UART_AbortTransmitCpltCallback(huart);
  3467. #endif /* USE_HAL_UART_REGISTER_CALLBACKS */
  3468. }
  3469.  
  3470. /**
  3471.   * @brief  DMA UART Rx communication abort callback, when initiated by user by a call to
  3472.   *         HAL_UART_AbortReceive_IT API (Abort only Rx transfer)
  3473.   *         (This callback is executed at end of DMA Rx Abort procedure following user abort request,
  3474.   *         and leads to user Rx Abort Complete callback execution).
  3475.   * @param  hdma  Pointer to a DMA_HandleTypeDef structure that contains
  3476.   *               the configuration information for the specified DMA module.
  3477.   * @retval None
  3478.   */
  3479. static void UART_DMARxOnlyAbortCallback(DMA_HandleTypeDef *hdma)
  3480. {
  3481.   UART_HandleTypeDef *huart = (UART_HandleTypeDef *)((DMA_HandleTypeDef *)hdma)->Parent;
  3482.  
  3483.   huart->RxXferCount = 0x00U;
  3484.  
  3485.   /* Restore huart->RxState to Ready */
  3486.   huart->RxState = HAL_UART_STATE_READY;
  3487.   huart->ReceptionType = HAL_UART_RECEPTION_STANDARD;
  3488.  
  3489.   /* Call user Abort complete callback */
  3490. #if (USE_HAL_UART_REGISTER_CALLBACKS == 1)
  3491.   /* Call registered Abort Receive Complete Callback */
  3492.   huart->AbortReceiveCpltCallback(huart);
  3493. #else
  3494.   /* Call legacy weak Abort Receive Complete Callback */
  3495.   HAL_UART_AbortReceiveCpltCallback(huart);
  3496. #endif /* USE_HAL_UART_REGISTER_CALLBACKS */
  3497. }
  3498.  
  3499. /**
  3500.   * @brief  Sends an amount of data in non blocking mode.
  3501.   * @param  huart  Pointer to a UART_HandleTypeDef structure that contains
  3502.   *                the configuration information for the specified UART module.
  3503.   * @retval HAL status
  3504.   */
  3505. static HAL_StatusTypeDef UART_Transmit_IT(UART_HandleTypeDef *huart)
  3506. {
  3507.   const uint16_t *tmp;
  3508.  
  3509.   /* Check that a Tx process is ongoing */
  3510.   if (huart->gState == HAL_UART_STATE_BUSY_TX)
  3511.   {
  3512.     if ((huart->Init.WordLength == UART_WORDLENGTH_9B) && (huart->Init.Parity == UART_PARITY_NONE))
  3513.     {
  3514.       tmp = (const uint16_t *) huart->pTxBuffPtr;
  3515.       huart->Instance->DR = (uint16_t)(*tmp & (uint16_t)0x01FF);
  3516.       huart->pTxBuffPtr += 2U;
  3517.     }
  3518.     else
  3519.     {
  3520.       huart->Instance->DR = (uint8_t)(*huart->pTxBuffPtr++ & (uint8_t)0x00FF);
  3521.     }
  3522.  
  3523.     if (--huart->TxXferCount == 0U)
  3524.     {
  3525.       /* Disable the UART Transmit Data Register Empty Interrupt */
  3526.       __HAL_UART_DISABLE_IT(huart, UART_IT_TXE);
  3527.  
  3528.       /* Enable the UART Transmit Complete Interrupt */
  3529.       __HAL_UART_ENABLE_IT(huart, UART_IT_TC);
  3530.     }
  3531.     return HAL_OK;
  3532.   }
  3533.   else
  3534.   {
  3535.     return HAL_BUSY;
  3536.   }
  3537. }
  3538.  
  3539. /**
  3540.   * @brief  Wraps up transmission in non blocking mode.
  3541.   * @param  huart  Pointer to a UART_HandleTypeDef structure that contains
  3542.   *                the configuration information for the specified UART module.
  3543.   * @retval HAL status
  3544.   */
  3545. static HAL_StatusTypeDef UART_EndTransmit_IT(UART_HandleTypeDef *huart)
  3546. {
  3547.   /* Disable the UART Transmit Complete Interrupt */
  3548.   __HAL_UART_DISABLE_IT(huart, UART_IT_TC);
  3549.  
  3550.   /* Tx process is ended, restore huart->gState to Ready */
  3551.   huart->gState = HAL_UART_STATE_READY;
  3552.  
  3553. #if (USE_HAL_UART_REGISTER_CALLBACKS == 1)
  3554.   /*Call registered Tx complete callback*/
  3555.   huart->TxCpltCallback(huart);
  3556. #else
  3557.   /*Call legacy weak Tx complete callback*/
  3558.   HAL_UART_TxCpltCallback(huart);
  3559. #endif /* USE_HAL_UART_REGISTER_CALLBACKS */
  3560.  
  3561.   return HAL_OK;
  3562. }
  3563.  
  3564. /**
  3565.   * @brief  Receives an amount of data in non blocking mode
  3566.   * @param  huart  Pointer to a UART_HandleTypeDef structure that contains
  3567.   *                the configuration information for the specified UART module.
  3568.   * @retval HAL status
  3569.   */
  3570. static HAL_StatusTypeDef UART_Receive_IT(UART_HandleTypeDef *huart)
  3571. {
  3572.   uint8_t  *pdata8bits;
  3573.   uint16_t *pdata16bits;
  3574.  
  3575.   /* Check that a Rx process is ongoing */
  3576.   if (huart->RxState == HAL_UART_STATE_BUSY_RX)
  3577.   {
  3578.     if ((huart->Init.WordLength == UART_WORDLENGTH_9B) && (huart->Init.Parity == UART_PARITY_NONE))
  3579.     {
  3580.       pdata8bits  = NULL;
  3581.       pdata16bits = (uint16_t *) huart->pRxBuffPtr;
  3582.       *pdata16bits = (uint16_t)(huart->Instance->DR & (uint16_t)0x01FF);
  3583.       huart->pRxBuffPtr += 2U;
  3584.     }
  3585.     else
  3586.     {
  3587.       pdata8bits = (uint8_t *) huart->pRxBuffPtr;
  3588.       pdata16bits  = NULL;
  3589.  
  3590.       if ((huart->Init.WordLength == UART_WORDLENGTH_9B) || ((huart->Init.WordLength == UART_WORDLENGTH_8B) && (huart->Init.Parity == UART_PARITY_NONE)))
  3591.       {
  3592.         *pdata8bits = (uint8_t)(huart->Instance->DR & (uint8_t)0x00FF);
  3593.       }
  3594.       else
  3595.       {
  3596.         *pdata8bits = (uint8_t)(huart->Instance->DR & (uint8_t)0x007F);
  3597.       }
  3598.       huart->pRxBuffPtr += 1U;
  3599.     }
  3600.  
  3601.     if (--huart->RxXferCount == 0U)
  3602.     {
  3603.       /* Disable the UART Data Register not empty Interrupt */
  3604.       __HAL_UART_DISABLE_IT(huart, UART_IT_RXNE);
  3605.  
  3606.       /* Disable the UART Parity Error Interrupt */
  3607.       __HAL_UART_DISABLE_IT(huart, UART_IT_PE);
  3608.  
  3609.       /* Disable the UART Error Interrupt: (Frame error, noise error, overrun error) */
  3610.       __HAL_UART_DISABLE_IT(huart, UART_IT_ERR);
  3611.  
  3612.       /* Rx process is completed, restore huart->RxState to Ready */
  3613.       huart->RxState = HAL_UART_STATE_READY;
  3614.  
  3615.       /* Initialize type of RxEvent to Transfer Complete */
  3616.       huart->RxEventType = HAL_UART_RXEVENT_TC;
  3617.  
  3618.       /* Check current reception Mode :
  3619.          If Reception till IDLE event has been selected : */
  3620.       if (huart->ReceptionType == HAL_UART_RECEPTION_TOIDLE)
  3621.       {
  3622.         /* Set reception type to Standard */
  3623.         huart->ReceptionType = HAL_UART_RECEPTION_STANDARD;
  3624.  
  3625.         /* Disable IDLE interrupt */
  3626.         ATOMIC_CLEAR_BIT(huart->Instance->CR1, USART_CR1_IDLEIE);
  3627.  
  3628.         /* Check if IDLE flag is set */
  3629.         if (__HAL_UART_GET_FLAG(huart, UART_FLAG_IDLE))
  3630.         {
  3631.           /* Clear IDLE flag in ISR */
  3632.           __HAL_UART_CLEAR_IDLEFLAG(huart);
  3633.         }
  3634.  
  3635. #if (USE_HAL_UART_REGISTER_CALLBACKS == 1)
  3636.         /*Call registered Rx Event callback*/
  3637.         huart->RxEventCallback(huart, huart->RxXferSize);
  3638. #else
  3639.         /*Call legacy weak Rx Event callback*/
  3640.         HAL_UARTEx_RxEventCallback(huart, huart->RxXferSize);
  3641. #endif /* USE_HAL_UART_REGISTER_CALLBACKS */
  3642.       }
  3643.       else
  3644.       {
  3645.         /* Standard reception API called */
  3646. #if (USE_HAL_UART_REGISTER_CALLBACKS == 1)
  3647.         /*Call registered Rx complete callback*/
  3648.         huart->RxCpltCallback(huart);
  3649. #else
  3650.         /*Call legacy weak Rx complete callback*/
  3651.         HAL_UART_RxCpltCallback(huart);
  3652. #endif /* USE_HAL_UART_REGISTER_CALLBACKS */
  3653.       }
  3654.  
  3655.       return HAL_OK;
  3656.     }
  3657.     return HAL_OK;
  3658.   }
  3659.   else
  3660.   {
  3661.     return HAL_BUSY;
  3662.   }
  3663. }
  3664.  
  3665. /**
  3666.   * @brief  Configures the UART peripheral.
  3667.   * @param  huart  Pointer to a UART_HandleTypeDef structure that contains
  3668.   *                the configuration information for the specified UART module.
  3669.   * @retval None
  3670.   */
  3671. static void UART_SetConfig(UART_HandleTypeDef *huart)
  3672. {
  3673.   uint32_t tmpreg;
  3674.   uint32_t pclk;
  3675.  
  3676.   /* Check the parameters */
  3677.   assert_param(IS_UART_BAUDRATE(huart->Init.BaudRate));
  3678.   assert_param(IS_UART_STOPBITS(huart->Init.StopBits));
  3679.   assert_param(IS_UART_PARITY(huart->Init.Parity));
  3680.   assert_param(IS_UART_MODE(huart->Init.Mode));
  3681.  
  3682.   /*-------------------------- USART CR2 Configuration -----------------------*/
  3683.   /* Configure the UART Stop Bits: Set STOP[13:12] bits
  3684.      according to huart->Init.StopBits value */
  3685.   MODIFY_REG(huart->Instance->CR2, USART_CR2_STOP, huart->Init.StopBits);
  3686.  
  3687.   /*-------------------------- USART CR1 Configuration -----------------------*/
  3688.   /* Configure the UART Word Length, Parity and mode:
  3689.      Set the M bits according to huart->Init.WordLength value
  3690.      Set PCE and PS bits according to huart->Init.Parity value
  3691.      Set TE and RE bits according to huart->Init.Mode value
  3692.      Set OVER8 bit according to huart->Init.OverSampling value */
  3693.  
  3694.   tmpreg = (uint32_t)huart->Init.WordLength | huart->Init.Parity | huart->Init.Mode | huart->Init.OverSampling;
  3695.   MODIFY_REG(huart->Instance->CR1,
  3696.              (uint32_t)(USART_CR1_M | USART_CR1_PCE | USART_CR1_PS | USART_CR1_TE | USART_CR1_RE | USART_CR1_OVER8),
  3697.              tmpreg);
  3698.  
  3699.   /*-------------------------- USART CR3 Configuration -----------------------*/
  3700.   /* Configure the UART HFC: Set CTSE and RTSE bits according to huart->Init.HwFlowCtl value */
  3701.   MODIFY_REG(huart->Instance->CR3, (USART_CR3_RTSE | USART_CR3_CTSE), huart->Init.HwFlowCtl);
  3702.  
  3703.  
  3704.   if((huart->Instance == USART1))
  3705.   {
  3706.     pclk = HAL_RCC_GetPCLK2Freq();
  3707.   }
  3708.   else
  3709.   {
  3710.     pclk = HAL_RCC_GetPCLK1Freq();
  3711.   }
  3712.  
  3713.   /*-------------------------- USART BRR Configuration ---------------------*/
  3714.   if (huart->Init.OverSampling == UART_OVERSAMPLING_8)
  3715.   {
  3716.     huart->Instance->BRR = UART_BRR_SAMPLING8(pclk, huart->Init.BaudRate);
  3717.   }
  3718.   else
  3719.   {
  3720.     huart->Instance->BRR = UART_BRR_SAMPLING16(pclk, huart->Init.BaudRate);
  3721.   }
  3722. }
  3723.  
  3724. /**
  3725.   * @}
  3726.   */
  3727.  
  3728. #endif /* HAL_UART_MODULE_ENABLED */
  3729. /**
  3730.   * @}
  3731.   */
  3732.  
  3733. /**
  3734.   * @}
  3735.   */
  3736.  
  3737.