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  1. /**
  2.   ******************************************************************************
  3.   * @file    stm32f0xx_hal_usart.c
  4.   * @author  MCD Application Team
  5.   * @brief   USART HAL module driver.
  6.   *          This file provides firmware functions to manage the following
  7.   *          functionalities of the Universal Synchronous/Asynchronous Receiver Transmitter
  8.   *          Peripheral (USART).
  9.   *           + Initialization and de-initialization functions
  10.   *           + IO operation functions
  11.   *           + Peripheral Control functions
  12.   *           + Peripheral State and Error functions
  13.   *
  14.   @verbatim
  15.  ===============================================================================
  16.                         ##### How to use this driver #####
  17.  ===============================================================================
  18.     [..]
  19.       The USART HAL driver can be used as follows:
  20.  
  21.       (#) Declare a USART_HandleTypeDef handle structure (eg. USART_HandleTypeDef husart).
  22.       (#) Initialize the USART low level resources by implementing the HAL_USART_MspInit() API:
  23.           (++) Enable the USARTx interface clock.
  24.           (++) USART pins configuration:
  25.             (+++) Enable the clock for the USART GPIOs.
  26.             (+++) Configure these USART pins as alternate function pull-up.
  27.           (++) NVIC configuration if you need to use interrupt process (HAL_USART_Transmit_IT(),
  28.                 HAL_USART_Receive_IT() and HAL_USART_TransmitReceive_IT() APIs):
  29.             (+++) Configure the USARTx interrupt priority.
  30.             (+++) Enable the NVIC USART IRQ handle.
  31.             (++) USART interrupts handling:
  32.               -@@-   The specific USART interrupts (Transmission complete interrupt,
  33.                   RXNE interrupt and Error Interrupts) will be managed using the macros
  34.                   __HAL_USART_ENABLE_IT() and __HAL_USART_DISABLE_IT() inside the transmit and receive process.
  35.           (++) DMA Configuration if you need to use DMA process (HAL_USART_Transmit_DMA()
  36.                HAL_USART_Receive_DMA() and HAL_USART_TransmitReceive_DMA() APIs):
  37.             (+++) Declare a DMA handle structure for the Tx/Rx channel.
  38.             (+++) Enable the DMAx interface clock.
  39.             (+++) Configure the declared DMA handle structure with the required Tx/Rx parameters.
  40.             (+++) Configure the DMA Tx/Rx channel.
  41.             (+++) Associate the initialized DMA handle to the USART DMA Tx/Rx handle.
  42.             (+++) Configure the priority and enable the NVIC for the transfer complete interrupt on the DMA Tx/Rx channel.
  43.  
  44.       (#) Program the Baud Rate, Word Length, Stop Bit, Parity, and Mode
  45.           (Receiver/Transmitter) in the husart handle Init structure.
  46.  
  47.       (#) Initialize the USART registers by calling the HAL_USART_Init() API:
  48.           (++) This API configures also the low level Hardware GPIO, CLOCK, CORTEX...etc)
  49.                by calling the customized HAL_USART_MspInit(&husart) API.
  50.  
  51.     [..]
  52.      (@) To configure and enable/disable the USART to wake up the MCU from stop mode, resort to UART API's
  53.         HAL_UARTEx_StopModeWakeUpSourceConfig(), HAL_UARTEx_EnableStopMode() and
  54.         HAL_UARTEx_DisableStopMode() in casting the USART handle to UART type UART_HandleTypeDef.
  55.  
  56.     ##### Callback registration #####
  57.     ==================================
  58.  
  59.     [..]
  60.     The compilation define USE_HAL_USART_REGISTER_CALLBACKS when set to 1
  61.     allows the user to configure dynamically the driver callbacks.
  62.  
  63.     [..]
  64.     Use Function @ref HAL_USART_RegisterCallback() to register a user callback.
  65.     Function @ref HAL_USART_RegisterCallback() allows to register following callbacks:
  66.     (+) TxHalfCpltCallback        : Tx Half Complete Callback.
  67.     (+) TxCpltCallback            : Tx Complete Callback.
  68.     (+) RxHalfCpltCallback        : Rx Half Complete Callback.
  69.     (+) RxCpltCallback            : Rx Complete Callback.
  70.     (+) TxRxCpltCallback          : Tx Rx Complete Callback.
  71.     (+) ErrorCallback             : Error Callback.
  72.     (+) AbortCpltCallback         : Abort Complete Callback.
  73.     (+) MspInitCallback           : USART MspInit.
  74.     (+) MspDeInitCallback         : USART MspDeInit.
  75.     This function takes as parameters the HAL peripheral handle, the Callback ID
  76.     and a pointer to the user callback function.
  77.  
  78.     [..]
  79.     Use function @ref HAL_USART_UnRegisterCallback() to reset a callback to the default
  80.     weak (surcharged) function.
  81.     @ref HAL_USART_UnRegisterCallback() takes as parameters the HAL peripheral handle,
  82.     and the Callback ID.
  83.     This function allows to reset following callbacks:
  84.     (+) TxHalfCpltCallback        : Tx Half Complete Callback.
  85.     (+) TxCpltCallback            : Tx Complete Callback.
  86.     (+) RxHalfCpltCallback        : Rx Half Complete Callback.
  87.     (+) RxCpltCallback            : Rx Complete Callback.
  88.     (+) TxRxCpltCallback          : Tx Rx Complete Callback.
  89.     (+) ErrorCallback             : Error Callback.
  90.     (+) AbortCpltCallback         : Abort Complete Callback.
  91.     (+) MspInitCallback           : USART MspInit.
  92.     (+) MspDeInitCallback         : USART MspDeInit.
  93.  
  94.     [..]
  95.     By default, after the @ref HAL_USART_Init() and when the state is HAL_USART_STATE_RESET
  96.     all callbacks are set to the corresponding weak (surcharged) functions:
  97.     examples @ref HAL_USART_TxCpltCallback(), @ref HAL_USART_RxHalfCpltCallback().
  98.     Exception done for MspInit and MspDeInit functions that are respectively
  99.     reset to the legacy weak (surcharged) functions in the @ref HAL_USART_Init()
  100.     and @ref HAL_USART_DeInit() only when these callbacks are null (not registered beforehand).
  101.     If not, MspInit or MspDeInit are not null, the @ref HAL_USART_Init() and @ref HAL_USART_DeInit()
  102.     keep and use the user MspInit/MspDeInit callbacks (registered beforehand).
  103.  
  104.     [..]
  105.     Callbacks can be registered/unregistered in HAL_USART_STATE_READY state only.
  106.     Exception done MspInit/MspDeInit that can be registered/unregistered
  107.     in HAL_USART_STATE_READY or HAL_USART_STATE_RESET state, thus registered (user)
  108.     MspInit/DeInit callbacks can be used during the Init/DeInit.
  109.     In that case first register the MspInit/MspDeInit user callbacks
  110.     using @ref HAL_USART_RegisterCallback() before calling @ref HAL_USART_DeInit()
  111.     or @ref HAL_USART_Init() function.
  112.  
  113.     [..]
  114.     When The compilation define USE_HAL_USART_REGISTER_CALLBACKS is set to 0 or
  115.     not defined, the callback registration feature is not available
  116.     and weak (surcharged) callbacks are used.
  117.  
  118.  
  119.   @endverbatim
  120.   ******************************************************************************
  121.   * @attention
  122.   *
  123.   * <h2><center>&copy; Copyright (c) 2016 STMicroelectronics.
  124.   * All rights reserved.</center></h2>
  125.   *
  126.   * This software component is licensed by ST under BSD 3-Clause license,
  127.   * the "License"; You may not use this file except in compliance with the
  128.   * License. You may obtain a copy of the License at:
  129.   *                        opensource.org/licenses/BSD-3-Clause
  130.   *
  131.   ******************************************************************************
  132.   */
  133.  
  134. /* Includes ------------------------------------------------------------------*/
  135. #include "stm32f0xx_hal.h"
  136.  
  137. /** @addtogroup STM32F0xx_HAL_Driver
  138.   * @{
  139.   */
  140.  
  141. /** @defgroup USART USART
  142.   * @brief HAL USART Synchronous module driver
  143.   * @{
  144.   */
  145.  
  146. #ifdef HAL_USART_MODULE_ENABLED
  147.  
  148. /* Private typedef -----------------------------------------------------------*/
  149. /* Private define ------------------------------------------------------------*/
  150. /** @defgroup USART_Private_Constants USART Private Constants
  151.   * @{
  152.   */
  153. #define USART_DUMMY_DATA          ((uint16_t) 0xFFFF)           /*!< USART transmitted dummy data                     */
  154. #define USART_TEACK_REACK_TIMEOUT             1000U             /*!< USART TX or RX enable acknowledge time-out value */
  155. #define USART_CR1_FIELDS          ((uint32_t)(USART_CR1_M | USART_CR1_PCE | USART_CR1_PS | \
  156.                                               USART_CR1_TE | USART_CR1_RE  | USART_CR1_OVER8))    /*!< USART CR1 fields of parameters set by USART_SetConfig API */
  157. #define USART_CR2_FIELDS          ((uint32_t)(USART_CR2_CPHA | USART_CR2_CPOL | \
  158.                                               USART_CR2_CLKEN | USART_CR2_LBCL | USART_CR2_STOP)) /*!< USART CR2 fields of parameters set by USART_SetConfig API */
  159.  
  160. #define USART_BRR_MIN    0x10U        /* USART BRR minimum authorized value */
  161. #define USART_BRR_MAX    0xFFFFU      /* USART BRR maximum authorized value */
  162. /**
  163.   * @}
  164.   */
  165.  
  166. /* Private macros ------------------------------------------------------------*/
  167. /* Private variables ---------------------------------------------------------*/
  168. /* Private function prototypes -----------------------------------------------*/
  169. /** @addtogroup USART_Private_Functions
  170.   * @{
  171.   */
  172. #if (USE_HAL_USART_REGISTER_CALLBACKS == 1)
  173. void USART_InitCallbacksToDefault(USART_HandleTypeDef *husart);
  174. #endif /* USE_HAL_USART_REGISTER_CALLBACKS */
  175. static void USART_EndTransfer(USART_HandleTypeDef *husart);
  176. static void USART_DMATransmitCplt(DMA_HandleTypeDef *hdma);
  177. static void USART_DMAReceiveCplt(DMA_HandleTypeDef *hdma);
  178. static void USART_DMATxHalfCplt(DMA_HandleTypeDef *hdma);
  179. static void USART_DMARxHalfCplt(DMA_HandleTypeDef *hdma);
  180. static void USART_DMAError(DMA_HandleTypeDef *hdma);
  181. static void USART_DMAAbortOnError(DMA_HandleTypeDef *hdma);
  182. static void USART_DMATxAbortCallback(DMA_HandleTypeDef *hdma);
  183. static void USART_DMARxAbortCallback(DMA_HandleTypeDef *hdma);
  184. static HAL_StatusTypeDef USART_WaitOnFlagUntilTimeout(USART_HandleTypeDef *husart, uint32_t Flag, FlagStatus Status,
  185.                                                       uint32_t Tickstart, uint32_t Timeout);
  186. static HAL_StatusTypeDef USART_SetConfig(USART_HandleTypeDef *husart);
  187. static HAL_StatusTypeDef USART_CheckIdleState(USART_HandleTypeDef *husart);
  188. static void USART_TxISR_8BIT(USART_HandleTypeDef *husart);
  189. static void USART_TxISR_16BIT(USART_HandleTypeDef *husart);
  190. static void USART_EndTransmit_IT(USART_HandleTypeDef *husart);
  191. static void USART_RxISR_8BIT(USART_HandleTypeDef *husart);
  192. static void USART_RxISR_16BIT(USART_HandleTypeDef *husart);
  193.  
  194.  
  195. /**
  196.   * @}
  197.   */
  198.  
  199. /* Exported functions --------------------------------------------------------*/
  200.  
  201. /** @defgroup USART_Exported_Functions USART Exported Functions
  202.   * @{
  203.   */
  204.  
  205. /** @defgroup USART_Exported_Functions_Group1 Initialization and de-initialization functions
  206.   * @brief    Initialization and Configuration functions
  207.   *
  208. @verbatim
  209.  ===============================================================================
  210.             ##### Initialization and Configuration functions #####
  211.  ===============================================================================
  212.     [..]
  213.     This subsection provides a set of functions allowing to initialize the USART
  214.     in asynchronous and in synchronous modes.
  215.       (+) For the asynchronous mode only these parameters can be configured:
  216.         (++) Baud Rate
  217.         (++) Word Length
  218.         (++) Stop Bit
  219.         (++) Parity: If the parity is enabled, then the MSB bit of the data written
  220.              in the data register is transmitted but is changed by the parity bit.
  221.         (++) USART polarity
  222.         (++) USART phase
  223.         (++) USART LastBit
  224.         (++) Receiver/transmitter modes
  225.  
  226.     [..]
  227.     The HAL_USART_Init() function follows the USART  synchronous configuration
  228.     procedure (details for the procedure are available in reference manual).
  229.  
  230. @endverbatim
  231.  
  232.   Depending on the frame length either defined by the M1 and M0 bits (7-bit,
  233.   8-bit or 9-bit) or  by the M bit (8-bits or 9-bits), the possible USART formats
  234.   are listed in the following table.
  235.  
  236.     Table 1. USART frame format.
  237.     +-----------------------------------------------------------------------+
  238.     |       M bit       |  PCE bit  |             USART frame               |
  239.     |-------------------|-----------|---------------------------------------|
  240.     |         0         |     0     |    | SB |    8-bit data   | STB |     |
  241.     |-------------------|-----------|---------------------------------------|
  242.     |         0         |     1     |    | SB | 7-bit data | PB | STB |     |
  243.     |-------------------|-----------|---------------------------------------|
  244.     |         1         |     0     |    | SB |    9-bit data   | STB |     |
  245.     |-------------------|-----------|---------------------------------------|
  246.     |         1         |     1     |    | SB | 8-bit data | PB | STB |     |
  247.     +-----------------------------------------------------------------------+
  248.     +-----------------------------------------------------------------------+
  249.     |  M1 bit |  M0 bit |  PCE bit  |            USART frame                |
  250.     |---------|---------|-----------|---------------------------------------|
  251.     |    0    |    0    |    0      |    | SB |    8 bit data   | STB |     |
  252.     |---------|---------|-----------|---------------------------------------|
  253.     |    0    |    0    |    1      |    | SB | 7 bit data | PB | STB |     |
  254.     |---------|---------|-----------|---------------------------------------|
  255.     |    0    |    1    |    0      |    | SB |    9 bit data   | STB |     |
  256.     |---------|---------|-----------|---------------------------------------|
  257.     |    0    |    1    |    1      |    | SB | 8 bit data | PB | STB |     |
  258.     |---------|---------|-----------|---------------------------------------|
  259.     |    1    |    0    |    0      |    | SB |    7 bit data   | STB |     |
  260.     |---------|---------|-----------|---------------------------------------|
  261.     |    1    |    0    |    1      |    | SB | 6 bit data | PB | STB |     |
  262.     +-----------------------------------------------------------------------+
  263.  
  264.   * @{
  265.   */
  266.  
  267. /**
  268.   * @brief  Initialize the USART mode according to the specified
  269.   *         parameters in the USART_InitTypeDef and initialize the associated handle.
  270.   * @param  husart USART handle.
  271.   * @retval HAL status
  272.   */
  273. HAL_StatusTypeDef HAL_USART_Init(USART_HandleTypeDef *husart)
  274. {
  275.   /* Check the USART handle allocation */
  276.   if (husart == NULL)
  277.   {
  278.     return HAL_ERROR;
  279.   }
  280.  
  281.   /* Check the parameters */
  282.   assert_param(IS_USART_INSTANCE(husart->Instance));
  283.  
  284.   if (husart->State == HAL_USART_STATE_RESET)
  285.   {
  286.     /* Allocate lock resource and initialize it */
  287.     husart->Lock = HAL_UNLOCKED;
  288.  
  289. #if (USE_HAL_USART_REGISTER_CALLBACKS == 1)
  290.     USART_InitCallbacksToDefault(husart);
  291.  
  292.     if (husart->MspInitCallback == NULL)
  293.     {
  294.       husart->MspInitCallback = HAL_USART_MspInit;
  295.     }
  296.  
  297.     /* Init the low level hardware */
  298.     husart->MspInitCallback(husart);
  299. #else
  300.     /* Init the low level hardware : GPIO, CLOCK */
  301.     HAL_USART_MspInit(husart);
  302. #endif /* USE_HAL_USART_REGISTER_CALLBACKS */
  303.   }
  304.  
  305.   husart->State = HAL_USART_STATE_BUSY;
  306.  
  307.   /* Disable the Peripheral */
  308.   __HAL_USART_DISABLE(husart);
  309.  
  310.   /* Set the Usart Communication parameters */
  311.   if (USART_SetConfig(husart) == HAL_ERROR)
  312.   {
  313.     return HAL_ERROR;
  314.   }
  315.  
  316.   /* In Synchronous mode, the following bits must be kept cleared:
  317.   - LINEN bit (if LIN is supported) in the USART_CR2 register
  318.   - SCEN (if Smartcard is supported), HDSEL and IREN (if IrDA is supported) bits in the USART_CR3 register.
  319.   */
  320. #if  defined (USART_CR2_LINEN)
  321.   husart->Instance->CR2 &= ~USART_CR2_LINEN;
  322. #endif /* USART_CR2_LINEN */
  323. #if  defined (USART_CR3_SCEN)
  324. #if  defined (USART_CR3_IREN)
  325.   husart->Instance->CR3 &= ~(USART_CR3_SCEN | USART_CR3_HDSEL | USART_CR3_IREN);
  326. #else
  327.   husart->Instance->CR3 &= ~(USART_CR3_SCEN | USART_CR3_HDSEL);
  328. #endif /* USART_CR3_IREN */
  329. #else
  330. #if  defined (USART_CR3_IREN)
  331.   husart->Instance->CR3 &= ~(USART_CR3_HDSEL | USART_CR3_IREN);
  332. #else
  333.   husart->Instance->CR3 &= ~(USART_CR3_HDSEL);
  334. #endif /* USART_CR3_IREN */
  335. #endif /* USART_CR3_SCEN */
  336.  
  337.   /* Enable the Peripheral */
  338.   __HAL_USART_ENABLE(husart);
  339.  
  340.   /* TEACK and/or REACK to check before moving husart->State to Ready */
  341.   return (USART_CheckIdleState(husart));
  342. }
  343.  
  344. /**
  345.   * @brief DeInitialize the USART peripheral.
  346.   * @param  husart USART handle.
  347.   * @retval HAL status
  348.   */
  349. HAL_StatusTypeDef HAL_USART_DeInit(USART_HandleTypeDef *husart)
  350. {
  351.   /* Check the USART handle allocation */
  352.   if (husart == NULL)
  353.   {
  354.     return HAL_ERROR;
  355.   }
  356.  
  357.   /* Check the parameters */
  358.   assert_param(IS_USART_INSTANCE(husart->Instance));
  359.  
  360.   husart->State = HAL_USART_STATE_BUSY;
  361.  
  362.   husart->Instance->CR1 = 0x0U;
  363.   husart->Instance->CR2 = 0x0U;
  364.   husart->Instance->CR3 = 0x0U;
  365.  
  366. #if (USE_HAL_USART_REGISTER_CALLBACKS == 1)
  367.   if (husart->MspDeInitCallback == NULL)
  368.   {
  369.     husart->MspDeInitCallback = HAL_USART_MspDeInit;
  370.   }
  371.   /* DeInit the low level hardware */
  372.   husart->MspDeInitCallback(husart);
  373. #else
  374.   /* DeInit the low level hardware */
  375.   HAL_USART_MspDeInit(husart);
  376. #endif /* USE_HAL_USART_REGISTER_CALLBACKS */
  377.  
  378.   husart->ErrorCode = HAL_USART_ERROR_NONE;
  379.   husart->State = HAL_USART_STATE_RESET;
  380.  
  381.   /* Process Unlock */
  382.   __HAL_UNLOCK(husart);
  383.  
  384.   return HAL_OK;
  385. }
  386.  
  387. /**
  388.   * @brief Initialize the USART MSP.
  389.   * @param husart USART handle.
  390.   * @retval None
  391.   */
  392. __weak void HAL_USART_MspInit(USART_HandleTypeDef *husart)
  393. {
  394.   /* Prevent unused argument(s) compilation warning */
  395.   UNUSED(husart);
  396.  
  397.   /* NOTE : This function should not be modified, when the callback is needed,
  398.             the HAL_USART_MspInit can be implemented in the user file
  399.    */
  400. }
  401.  
  402. /**
  403.   * @brief DeInitialize the USART MSP.
  404.   * @param husart USART handle.
  405.   * @retval None
  406.   */
  407. __weak void HAL_USART_MspDeInit(USART_HandleTypeDef *husart)
  408. {
  409.   /* Prevent unused argument(s) compilation warning */
  410.   UNUSED(husart);
  411.  
  412.   /* NOTE : This function should not be modified, when the callback is needed,
  413.             the HAL_USART_MspDeInit can be implemented in the user file
  414.    */
  415. }
  416.  
  417. #if (USE_HAL_USART_REGISTER_CALLBACKS == 1)
  418. /**
  419.   * @brief  Register a User USART Callback
  420.   *         To be used instead of the weak predefined callback
  421.   * @param  husart usart handle
  422.   * @param  CallbackID ID of the callback to be registered
  423.   *         This parameter can be one of the following values:
  424.   *           @arg @ref HAL_USART_TX_HALFCOMPLETE_CB_ID Tx Half Complete Callback ID
  425.   *           @arg @ref HAL_USART_TX_COMPLETE_CB_ID Tx Complete Callback ID
  426.   *           @arg @ref HAL_USART_RX_HALFCOMPLETE_CB_ID Rx Half Complete Callback ID
  427.   *           @arg @ref HAL_USART_RX_COMPLETE_CB_ID Rx Complete Callback ID
  428.   *           @arg @ref HAL_USART_TX_RX_COMPLETE_CB_ID Rx Complete Callback ID
  429.   *           @arg @ref HAL_USART_ERROR_CB_ID Error Callback ID
  430.   *           @arg @ref HAL_USART_ABORT_COMPLETE_CB_ID Abort Complete Callback ID
  431.   *           @arg @ref HAL_USART_MSPINIT_CB_ID MspInit Callback ID
  432.   *           @arg @ref HAL_USART_MSPDEINIT_CB_ID MspDeInit Callback ID
  433.   * @param  pCallback pointer to the Callback function
  434.   * @retval HAL status
  435. +  */
  436. HAL_StatusTypeDef HAL_USART_RegisterCallback(USART_HandleTypeDef *husart, HAL_USART_CallbackIDTypeDef CallbackID,
  437.                                              pUSART_CallbackTypeDef pCallback)
  438. {
  439.   HAL_StatusTypeDef status = HAL_OK;
  440.  
  441.   if (pCallback == NULL)
  442.   {
  443.     /* Update the error code */
  444.     husart->ErrorCode |= HAL_USART_ERROR_INVALID_CALLBACK;
  445.  
  446.     return HAL_ERROR;
  447.   }
  448.   /* Process locked */
  449.   __HAL_LOCK(husart);
  450.  
  451.   if (husart->State == HAL_USART_STATE_READY)
  452.   {
  453.     switch (CallbackID)
  454.     {
  455.       case HAL_USART_TX_HALFCOMPLETE_CB_ID :
  456.         husart->TxHalfCpltCallback = pCallback;
  457.         break;
  458.  
  459.       case HAL_USART_TX_COMPLETE_CB_ID :
  460.         husart->TxCpltCallback = pCallback;
  461.         break;
  462.  
  463.       case HAL_USART_RX_HALFCOMPLETE_CB_ID :
  464.         husart->RxHalfCpltCallback = pCallback;
  465.         break;
  466.  
  467.       case HAL_USART_RX_COMPLETE_CB_ID :
  468.         husart->RxCpltCallback = pCallback;
  469.         break;
  470.  
  471.       case HAL_USART_TX_RX_COMPLETE_CB_ID :
  472.         husart->TxRxCpltCallback = pCallback;
  473.         break;
  474.  
  475.       case HAL_USART_ERROR_CB_ID :
  476.         husart->ErrorCallback = pCallback;
  477.         break;
  478.  
  479.       case HAL_USART_ABORT_COMPLETE_CB_ID :
  480.         husart->AbortCpltCallback = pCallback;
  481.         break;
  482.  
  483.  
  484.       case HAL_USART_MSPINIT_CB_ID :
  485.         husart->MspInitCallback = pCallback;
  486.         break;
  487.  
  488.       case HAL_USART_MSPDEINIT_CB_ID :
  489.         husart->MspDeInitCallback = pCallback;
  490.         break;
  491.  
  492.       default :
  493.         /* Update the error code */
  494.         husart->ErrorCode |= HAL_USART_ERROR_INVALID_CALLBACK;
  495.  
  496.         /* Return error status */
  497.         status =  HAL_ERROR;
  498.         break;
  499.     }
  500.   }
  501.   else if (husart->State == HAL_USART_STATE_RESET)
  502.   {
  503.     switch (CallbackID)
  504.     {
  505.       case HAL_USART_MSPINIT_CB_ID :
  506.         husart->MspInitCallback = pCallback;
  507.         break;
  508.  
  509.       case HAL_USART_MSPDEINIT_CB_ID :
  510.         husart->MspDeInitCallback = pCallback;
  511.         break;
  512.  
  513.       default :
  514.         /* Update the error code */
  515.         husart->ErrorCode |= HAL_USART_ERROR_INVALID_CALLBACK;
  516.  
  517.         /* Return error status */
  518.         status =  HAL_ERROR;
  519.         break;
  520.     }
  521.   }
  522.   else
  523.   {
  524.     /* Update the error code */
  525.     husart->ErrorCode |= HAL_USART_ERROR_INVALID_CALLBACK;
  526.  
  527.     /* Return error status */
  528.     status =  HAL_ERROR;
  529.   }
  530.  
  531.   /* Release Lock */
  532.   __HAL_UNLOCK(husart);
  533.  
  534.   return status;
  535. }
  536.  
  537. /**
  538.   * @brief  Unregister an UART Callback
  539.   *         UART callaback is redirected to the weak predefined callback
  540.   * @param  husart uart handle
  541.   * @param  CallbackID ID of the callback to be unregistered
  542.   *         This parameter can be one of the following values:
  543.   *           @arg @ref HAL_USART_TX_HALFCOMPLETE_CB_ID Tx Half Complete Callback ID
  544.   *           @arg @ref HAL_USART_TX_COMPLETE_CB_ID Tx Complete Callback ID
  545.   *           @arg @ref HAL_USART_RX_HALFCOMPLETE_CB_ID Rx Half Complete Callback ID
  546.   *           @arg @ref HAL_USART_RX_COMPLETE_CB_ID Rx Complete Callback ID
  547.   *           @arg @ref HAL_USART_TX_RX_COMPLETE_CB_ID Rx Complete Callback ID
  548.   *           @arg @ref HAL_USART_ERROR_CB_ID Error Callback ID
  549.   *           @arg @ref HAL_USART_ABORT_COMPLETE_CB_ID Abort Complete Callback ID
  550.   *           @arg @ref HAL_USART_MSPINIT_CB_ID MspInit Callback ID
  551.   *           @arg @ref HAL_USART_MSPDEINIT_CB_ID MspDeInit Callback ID
  552.   * @retval HAL status
  553.   */
  554. HAL_StatusTypeDef HAL_USART_UnRegisterCallback(USART_HandleTypeDef *husart, HAL_USART_CallbackIDTypeDef CallbackID)
  555. {
  556.   HAL_StatusTypeDef status = HAL_OK;
  557.  
  558.   /* Process locked */
  559.   __HAL_LOCK(husart);
  560.  
  561.   if (HAL_USART_STATE_READY == husart->State)
  562.   {
  563.     switch (CallbackID)
  564.     {
  565.       case HAL_USART_TX_HALFCOMPLETE_CB_ID :
  566.         husart->TxHalfCpltCallback = HAL_USART_TxHalfCpltCallback;               /* Legacy weak  TxHalfCpltCallback       */
  567.         break;
  568.  
  569.       case HAL_USART_TX_COMPLETE_CB_ID :
  570.         husart->TxCpltCallback = HAL_USART_TxCpltCallback;                       /* Legacy weak TxCpltCallback            */
  571.         break;
  572.  
  573.       case HAL_USART_RX_HALFCOMPLETE_CB_ID :
  574.         husart->RxHalfCpltCallback = HAL_USART_RxHalfCpltCallback;               /* Legacy weak RxHalfCpltCallback        */
  575.         break;
  576.  
  577.       case HAL_USART_RX_COMPLETE_CB_ID :
  578.         husart->RxCpltCallback = HAL_USART_RxCpltCallback;                       /* Legacy weak RxCpltCallback            */
  579.         break;
  580.  
  581.       case HAL_USART_TX_RX_COMPLETE_CB_ID :
  582.         husart->TxRxCpltCallback = HAL_USART_TxRxCpltCallback;                   /* Legacy weak TxRxCpltCallback            */
  583.         break;
  584.  
  585.       case HAL_USART_ERROR_CB_ID :
  586.         husart->ErrorCallback = HAL_USART_ErrorCallback;                         /* Legacy weak ErrorCallback             */
  587.         break;
  588.  
  589.       case HAL_USART_ABORT_COMPLETE_CB_ID :
  590.         husart->AbortCpltCallback = HAL_USART_AbortCpltCallback;                 /* Legacy weak AbortCpltCallback         */
  591.         break;
  592.  
  593.  
  594.       case HAL_USART_MSPINIT_CB_ID :
  595.         husart->MspInitCallback = HAL_USART_MspInit;                             /* Legacy weak MspInitCallback           */
  596.         break;
  597.  
  598.       case HAL_USART_MSPDEINIT_CB_ID :
  599.         husart->MspDeInitCallback = HAL_USART_MspDeInit;                         /* Legacy weak MspDeInitCallback         */
  600.         break;
  601.  
  602.       default :
  603.         /* Update the error code */
  604.         husart->ErrorCode |= HAL_USART_ERROR_INVALID_CALLBACK;
  605.  
  606.         /* Return error status */
  607.         status =  HAL_ERROR;
  608.         break;
  609.     }
  610.   }
  611.   else if (HAL_USART_STATE_RESET == husart->State)
  612.   {
  613.     switch (CallbackID)
  614.     {
  615.       case HAL_USART_MSPINIT_CB_ID :
  616.         husart->MspInitCallback = HAL_USART_MspInit;
  617.         break;
  618.  
  619.       case HAL_USART_MSPDEINIT_CB_ID :
  620.         husart->MspDeInitCallback = HAL_USART_MspDeInit;
  621.         break;
  622.  
  623.       default :
  624.         /* Update the error code */
  625.         husart->ErrorCode |= HAL_USART_ERROR_INVALID_CALLBACK;
  626.  
  627.         /* Return error status */
  628.         status =  HAL_ERROR;
  629.         break;
  630.     }
  631.   }
  632.   else
  633.   {
  634.     /* Update the error code */
  635.     husart->ErrorCode |= HAL_USART_ERROR_INVALID_CALLBACK;
  636.  
  637.     /* Return error status */
  638.     status =  HAL_ERROR;
  639.   }
  640.  
  641.   /* Release Lock */
  642.   __HAL_UNLOCK(husart);
  643.  
  644.   return status;
  645. }
  646. #endif /* USE_HAL_USART_REGISTER_CALLBACKS */
  647.  
  648.  
  649. /**
  650.   * @}
  651.   */
  652.  
  653. /** @defgroup USART_Exported_Functions_Group2 IO operation functions
  654.   * @brief   USART Transmit and Receive functions
  655.   *
  656. @verbatim
  657.  ===============================================================================
  658.                       ##### IO operation functions #####
  659.  ===============================================================================
  660.     [..] This subsection provides a set of functions allowing to manage the USART synchronous
  661.     data transfers.
  662.  
  663.     [..] The USART supports master mode only: it cannot receive or send data related to an input
  664.          clock (SCLK is always an output).
  665.  
  666.     [..]
  667.  
  668.     (#) There are two modes of transfer:
  669.         (++) Blocking mode: The communication is performed in polling mode.
  670.              The HAL status of all data processing is returned by the same function
  671.              after finishing transfer.
  672.         (++) No-Blocking mode: The communication is performed using Interrupts
  673.              or DMA, These API's return the HAL status.
  674.              The end of the data processing will be indicated through the
  675.              dedicated USART IRQ when using Interrupt mode or the DMA IRQ when
  676.              using DMA mode.
  677.              The HAL_USART_TxCpltCallback(), HAL_USART_RxCpltCallback() and HAL_USART_TxRxCpltCallback() user callbacks
  678.              will be executed respectively at the end of the transmit or Receive process
  679.              The HAL_USART_ErrorCallback()user callback will be executed when a communication error is detected
  680.  
  681.     (#) Blocking mode API's are :
  682.         (++) HAL_USART_Transmit() in simplex mode
  683.         (++) HAL_USART_Receive() in full duplex receive only
  684.         (++) HAL_USART_TransmitReceive() in full duplex mode
  685.  
  686.     (#) Non-Blocking mode API's with Interrupt are :
  687.         (++) HAL_USART_Transmit_IT() in simplex mode
  688.         (++) HAL_USART_Receive_IT() in full duplex receive only
  689.         (++) HAL_USART_TransmitReceive_IT() in full duplex mode
  690.         (++) HAL_USART_IRQHandler()
  691.  
  692.     (#) No-Blocking mode API's  with DMA are :
  693.         (++) HAL_USART_Transmit_DMA() in simplex mode
  694.         (++) HAL_USART_Receive_DMA() in full duplex receive only
  695.         (++) HAL_USART_TransmitReceive_DMA() in full duplex mode
  696.         (++) HAL_USART_DMAPause()
  697.         (++) HAL_USART_DMAResume()
  698.         (++) HAL_USART_DMAStop()
  699.  
  700.     (#) A set of Transfer Complete Callbacks are provided in Non_Blocking mode:
  701.         (++) HAL_USART_TxCpltCallback()
  702.         (++) HAL_USART_RxCpltCallback()
  703.         (++) HAL_USART_TxHalfCpltCallback()
  704.         (++) HAL_USART_RxHalfCpltCallback()
  705.         (++) HAL_USART_ErrorCallback()
  706.         (++) HAL_USART_TxRxCpltCallback()
  707.  
  708.     (#) Non-Blocking mode transfers could be aborted using Abort API's :
  709.         (++) HAL_USART_Abort()
  710.         (++) HAL_USART_Abort_IT()
  711.  
  712.     (#) For Abort services based on interrupts (HAL_USART_Abort_IT), a Abort Complete Callbacks is provided:
  713.         (++) HAL_USART_AbortCpltCallback()
  714.  
  715.     (#) In Non-Blocking mode transfers, possible errors are split into 2 categories.
  716.         Errors are handled as follows :
  717.         (++) Error is considered as Recoverable and non blocking : Transfer could go till end, but error severity is
  718.              to be evaluated by user : this concerns Frame Error, Parity Error or Noise Error in Interrupt mode reception .
  719.              Received character is then retrieved and stored in Rx buffer, Error code is set to allow user to identify error type,
  720.              and HAL_USART_ErrorCallback() user callback is executed. Transfer is kept ongoing on USART side.
  721.              If user wants to abort it, Abort services should be called by user.
  722.         (++) Error is considered as Blocking : Transfer could not be completed properly and is aborted.
  723.              This concerns Overrun Error In Interrupt mode reception and all errors in DMA mode.
  724.              Error code is set to allow user to identify error type, and HAL_USART_ErrorCallback() user callback is executed.
  725.  
  726. @endverbatim
  727.   * @{
  728.   */
  729.  
  730. /**
  731.   * @brief  Simplex send an amount of data in blocking mode.
  732.   * @note   When UART parity is not enabled (PCE = 0), and Word Length is configured to 9 bits (M1-M0 = 01),
  733.   *         the sent data is handled as a set of u16. In this case, Size must indicate the number
  734.   *         of u16 provided through pTxData.
  735.   * @note   When UART parity is not enabled (PCE = 0), and Word Length is configured to 9 bits (M1-M0 = 01),
  736.   *         address of user data buffer containing data to be sent, should be aligned on a half word frontier (16 bits)
  737.   *         (as sent data will be handled using u16 pointer cast). Depending on compilation chain,
  738.   *         use of specific alignment compilation directives or pragmas might be required to ensure proper alignment for pTxData.
  739.   * @param  husart USART handle.
  740.   * @param  pTxData Pointer to data buffer (u8 or u16 data elements).
  741.   * @param  Size Amount of data elements (u8 or u16) to be sent.
  742.   * @param  Timeout Timeout duration.
  743.   * @retval HAL status
  744.   */
  745. HAL_StatusTypeDef HAL_USART_Transmit(USART_HandleTypeDef *husart, uint8_t *pTxData, uint16_t Size, uint32_t Timeout)
  746. {
  747.   uint8_t  *ptxdata8bits;
  748.   uint16_t *ptxdata16bits;
  749.   uint32_t tickstart;
  750.  
  751.   if (husart->State == HAL_USART_STATE_READY)
  752.   {
  753.     if ((pTxData == NULL) || (Size == 0U))
  754.     {
  755.       return  HAL_ERROR;
  756.     }
  757.  
  758.     /* In case of 9bits/No Parity transfer, pTxData buffer provided as input parameter
  759.        should be aligned on a u16 frontier, as data to be filled into TDR will be
  760.        handled through a u16 cast. */
  761.     if ((husart->Init.WordLength == USART_WORDLENGTH_9B) && (husart->Init.Parity == USART_PARITY_NONE))
  762.     {
  763.       if ((((uint32_t)pTxData) & 1U) != 0U)
  764.       {
  765.         return  HAL_ERROR;
  766.       }
  767.     }
  768.  
  769.     /* Process Locked */
  770.     __HAL_LOCK(husart);
  771.  
  772.     husart->ErrorCode = HAL_USART_ERROR_NONE;
  773.     husart->State = HAL_USART_STATE_BUSY_TX;
  774.  
  775.     /* Init tickstart for timeout managment*/
  776.     tickstart = HAL_GetTick();
  777.  
  778.     husart->TxXferSize = Size;
  779.     husart->TxXferCount = Size;
  780.  
  781.     /* In case of 9bits/No Parity transfer, pTxData needs to be handled as a uint16_t pointer */
  782.     if ((husart->Init.WordLength == USART_WORDLENGTH_9B) && (husart->Init.Parity == USART_PARITY_NONE))
  783.     {
  784.       ptxdata8bits  = NULL;
  785.       ptxdata16bits = (uint16_t *) pTxData;
  786.     }
  787.     else
  788.     {
  789.       ptxdata8bits  = pTxData;
  790.       ptxdata16bits = NULL;
  791.     }
  792.  
  793.     /* Check the remaining data to be sent */
  794.     while (husart->TxXferCount > 0U)
  795.     {
  796.       if (USART_WaitOnFlagUntilTimeout(husart, USART_FLAG_TXE, RESET, tickstart, Timeout) != HAL_OK)
  797.       {
  798.         return HAL_TIMEOUT;
  799.       }
  800.       if (ptxdata8bits == NULL)
  801.       {
  802.         husart->Instance->TDR = (uint16_t)(*ptxdata16bits & 0x01FFU);
  803.         ptxdata16bits++;
  804.       }
  805.       else
  806.       {
  807.         husart->Instance->TDR = (uint8_t)(*ptxdata8bits & 0xFFU);
  808.         ptxdata8bits++;
  809.       }
  810.  
  811.       husart->TxXferCount--;
  812.     }
  813.  
  814.     if (USART_WaitOnFlagUntilTimeout(husart, USART_FLAG_TC, RESET, tickstart, Timeout) != HAL_OK)
  815.     {
  816.       return HAL_TIMEOUT;
  817.     }
  818.  
  819.     /* Clear Transmission Complete Flag */
  820.     __HAL_USART_CLEAR_FLAG(husart, USART_CLEAR_TCF);
  821.  
  822.     /* Clear overrun flag and discard the received data */
  823.     __HAL_USART_CLEAR_OREFLAG(husart);
  824.     __HAL_USART_SEND_REQ(husart, USART_RXDATA_FLUSH_REQUEST);
  825. #if   defined(USART_RQR_TXFRQ)
  826.     __HAL_USART_SEND_REQ(husart, USART_TXDATA_FLUSH_REQUEST);
  827. #endif /* USART_RQR_TXFRQ */
  828.  
  829.     /* At end of Tx process, restore husart->State to Ready */
  830.     husart->State = HAL_USART_STATE_READY;
  831.  
  832.     /* Process Unlocked */
  833.     __HAL_UNLOCK(husart);
  834.  
  835.     return HAL_OK;
  836.   }
  837.   else
  838.   {
  839.     return HAL_BUSY;
  840.   }
  841. }
  842.  
  843. /**
  844.   * @brief Receive an amount of data in blocking mode.
  845.   * @note   To receive synchronous data, dummy data are simultaneously transmitted.
  846.   * @note   When UART parity is not enabled (PCE = 0), and Word Length is configured to 9 bits (M1-M0 = 01),
  847.   *         the received data is handled as a set of u16. In this case, Size must indicate the number
  848.   *         of u16 available through pRxData.
  849.   * @note   When UART parity is not enabled (PCE = 0), and Word Length is configured to 9 bits (M1-M0 = 01),
  850.   *         address of user data buffer for storing data to be received, should be aligned on a half word frontier (16 bits)
  851.   *         (as received data will be handled using u16 pointer cast). Depending on compilation chain,
  852.   *         use of specific alignment compilation directives or pragmas might be required to ensure proper alignment for pRxData.
  853.   * @param husart USART handle.
  854.   * @param pRxData Pointer to data buffer (u8 or u16 data elements).
  855.   * @param Size Amount of data elements (u8 or u16) to be received.
  856.   * @param Timeout Timeout duration.
  857.   * @retval HAL status
  858.   */
  859. HAL_StatusTypeDef HAL_USART_Receive(USART_HandleTypeDef *husart, uint8_t *pRxData, uint16_t Size, uint32_t Timeout)
  860. {
  861.   uint8_t  *prxdata8bits;
  862.   uint16_t *prxdata16bits;
  863.   uint16_t uhMask;
  864.   uint32_t tickstart;
  865.  
  866.   if (husart->State == HAL_USART_STATE_READY)
  867.   {
  868.     if ((pRxData == NULL) || (Size == 0U))
  869.     {
  870.       return  HAL_ERROR;
  871.     }
  872.  
  873.     /* In case of 9bits/No Parity transfer, pRxData buffer provided as input parameter
  874.        should be aligned on a u16 frontier, as data to be received from RDR will be
  875.        handled through a u16 cast. */
  876.     if ((husart->Init.WordLength == USART_WORDLENGTH_9B) && (husart->Init.Parity == USART_PARITY_NONE))
  877.     {
  878.       if ((((uint32_t)pRxData) & 1U) != 0U)
  879.       {
  880.         return  HAL_ERROR;
  881.       }
  882.     }
  883.  
  884.     /* Process Locked */
  885.     __HAL_LOCK(husart);
  886.  
  887.     husart->ErrorCode = HAL_USART_ERROR_NONE;
  888.     husart->State = HAL_USART_STATE_BUSY_RX;
  889.  
  890.     /* Init tickstart for timeout managment*/
  891.     tickstart = HAL_GetTick();
  892.  
  893.     husart->RxXferSize = Size;
  894.     husart->RxXferCount = Size;
  895.  
  896.     /* Computation of USART mask to apply to RDR register */
  897.     USART_MASK_COMPUTATION(husart);
  898.     uhMask = husart->Mask;
  899.  
  900.     /* In case of 9bits/No Parity transfer, pRxData needs to be handled as a uint16_t pointer */
  901.     if ((husart->Init.WordLength == USART_WORDLENGTH_9B) && (husart->Init.Parity == USART_PARITY_NONE))
  902.     {
  903.       prxdata8bits  = NULL;
  904.       prxdata16bits = (uint16_t *) pRxData;
  905.     }
  906.     else
  907.     {
  908.       prxdata8bits  = pRxData;
  909.       prxdata16bits = NULL;
  910.     }
  911.  
  912.     /* as long as data have to be received */
  913.     while (husart->RxXferCount > 0U)
  914.     {
  915.       {
  916.         /* Wait until TXE flag is set to send dummy byte in order to generate the
  917.         * clock for the slave to send data.
  918.         * Whatever the frame length (7, 8 or 9-bit long), the same dummy value
  919.         * can be written for all the cases. */
  920.         if (USART_WaitOnFlagUntilTimeout(husart, USART_FLAG_TXE, RESET, tickstart, Timeout) != HAL_OK)
  921.         {
  922.           return HAL_TIMEOUT;
  923.         }
  924.         husart->Instance->TDR = (USART_DUMMY_DATA & (uint16_t)0x0FF);
  925.       }
  926.  
  927.       /* Wait for RXNE Flag */
  928.       if (USART_WaitOnFlagUntilTimeout(husart, USART_FLAG_RXNE, RESET, tickstart, Timeout) != HAL_OK)
  929.       {
  930.         return HAL_TIMEOUT;
  931.       }
  932.  
  933.       if (prxdata8bits == NULL)
  934.       {
  935.         *prxdata16bits = (uint16_t)(husart->Instance->RDR & uhMask);
  936.         prxdata16bits++;
  937.       }
  938.       else
  939.       {
  940.         *prxdata8bits = (uint8_t)(husart->Instance->RDR & (uint8_t)(uhMask & 0xFFU));
  941.         prxdata8bits++;
  942.       }
  943.  
  944.       husart->RxXferCount--;
  945.  
  946.     }
  947.  
  948.  
  949.     /* At end of Rx process, restore husart->State to Ready */
  950.     husart->State = HAL_USART_STATE_READY;
  951.  
  952.     /* Process Unlocked */
  953.     __HAL_UNLOCK(husart);
  954.  
  955.     return HAL_OK;
  956.   }
  957.   else
  958.   {
  959.     return HAL_BUSY;
  960.   }
  961. }
  962.  
  963. /**
  964.   * @brief Full-Duplex Send and Receive an amount of data in blocking mode.
  965.   * @note   When UART parity is not enabled (PCE = 0), and Word Length is configured to 9 bits (M1-M0 = 01),
  966.   *         the sent data and the received data are handled as sets of u16. In this case, Size must indicate the number
  967.   *         of u16 available through pTxData and through pRxData.
  968.   * @note   When UART parity is not enabled (PCE = 0), and Word Length is configured to 9 bits (M1-M0 = 01),
  969.   *         address of user data buffers containing data to be sent/received, should be aligned on a half word frontier (16 bits)
  970.   *         (as sent/received data will be handled using u16 pointer cast). Depending on compilation chain,
  971.   *         use of specific alignment compilation directives or pragmas might be required to ensure proper alignment for pTxData and pRxData.
  972.   * @param  husart USART handle.
  973.   * @param  pTxData pointer to TX data buffer (u8 or u16 data elements).
  974.   * @param  pRxData pointer to RX data buffer (u8 or u16 data elements).
  975.   * @param  Size amount of data elements (u8 or u16) to be sent (same amount to be received).
  976.   * @param  Timeout Timeout duration.
  977.   * @retval HAL status
  978.   */
  979. HAL_StatusTypeDef HAL_USART_TransmitReceive(USART_HandleTypeDef *husart, uint8_t *pTxData, uint8_t *pRxData,
  980.                                             uint16_t Size, uint32_t Timeout)
  981. {
  982.   uint8_t  *prxdata8bits;
  983.   uint16_t *prxdata16bits;
  984.   uint8_t  *ptxdata8bits;
  985.   uint16_t *ptxdata16bits;
  986.   uint16_t uhMask;
  987.   uint16_t rxdatacount;
  988.   uint32_t tickstart;
  989.  
  990.   if (husart->State == HAL_USART_STATE_READY)
  991.   {
  992.     if ((pTxData == NULL) || (pRxData == NULL) || (Size == 0U))
  993.     {
  994.       return  HAL_ERROR;
  995.     }
  996.  
  997.     /* In case of 9bits/No Parity transfer, pTxData and pRxData buffers provided as input parameter
  998.        should be aligned on a u16 frontier, as data to be filled into TDR/retrieved from RDR will be
  999.        handled through a u16 cast. */
  1000.     if ((husart->Init.WordLength == USART_WORDLENGTH_9B) && (husart->Init.Parity == USART_PARITY_NONE))
  1001.     {
  1002.       if (((((uint32_t)pTxData) & 1U) != 0U) || ((((uint32_t)pRxData) & 1U) != 0U))
  1003.       {
  1004.         return  HAL_ERROR;
  1005.       }
  1006.     }
  1007.  
  1008.     /* Process Locked */
  1009.     __HAL_LOCK(husart);
  1010.  
  1011.     husart->ErrorCode = HAL_USART_ERROR_NONE;
  1012.     husart->State = HAL_USART_STATE_BUSY_RX;
  1013.  
  1014.     /* Init tickstart for timeout managment*/
  1015.     tickstart = HAL_GetTick();
  1016.  
  1017.     husart->RxXferSize = Size;
  1018.     husart->TxXferSize = Size;
  1019.     husart->TxXferCount = Size;
  1020.     husart->RxXferCount = Size;
  1021.  
  1022.     /* Computation of USART mask to apply to RDR register */
  1023.     USART_MASK_COMPUTATION(husart);
  1024.     uhMask = husart->Mask;
  1025.  
  1026.     /* In case of 9bits/No Parity transfer, pRxData needs to be handled as a uint16_t pointer */
  1027.     if ((husart->Init.WordLength == USART_WORDLENGTH_9B) && (husart->Init.Parity == USART_PARITY_NONE))
  1028.     {
  1029.       prxdata8bits  = NULL;
  1030.       ptxdata8bits  = NULL;
  1031.       ptxdata16bits = (uint16_t *) pTxData;
  1032.       prxdata16bits = (uint16_t *) pRxData;
  1033.     }
  1034.     else
  1035.     {
  1036.       prxdata8bits  = pRxData;
  1037.       ptxdata8bits  = pTxData;
  1038.       ptxdata16bits = NULL;
  1039.       prxdata16bits = NULL;
  1040.     }
  1041.  
  1042.     if (husart->TxXferCount == 0x01U)
  1043.     {
  1044.       /* Wait until TXE flag is set to send data */
  1045.       if (USART_WaitOnFlagUntilTimeout(husart, USART_FLAG_TXE, RESET, tickstart, Timeout) != HAL_OK)
  1046.       {
  1047.         return HAL_TIMEOUT;
  1048.       }
  1049.       if (ptxdata8bits == NULL)
  1050.       {
  1051.         husart->Instance->TDR = (uint16_t)(*ptxdata16bits & uhMask);
  1052.         ptxdata16bits++;
  1053.       }
  1054.       else
  1055.       {
  1056.         husart->Instance->TDR = (uint8_t)(*ptxdata8bits & (uint8_t)(uhMask & 0xFFU));
  1057.         ptxdata8bits++;
  1058.       }
  1059.  
  1060.       husart->TxXferCount--;
  1061.     }
  1062.  
  1063.     /* Check the remain data to be sent */
  1064.     /* rxdatacount is a temporary variable for MISRAC2012-Rule-13.5 */
  1065.     rxdatacount = husart->RxXferCount;
  1066.     while ((husart->TxXferCount > 0U) || (rxdatacount > 0U))
  1067.     {
  1068.       if (husart->TxXferCount > 0U)
  1069.       {
  1070.         /* Wait until TXE flag is set to send data */
  1071.         if (USART_WaitOnFlagUntilTimeout(husart, USART_FLAG_TXE, RESET, tickstart, Timeout) != HAL_OK)
  1072.         {
  1073.           return HAL_TIMEOUT;
  1074.         }
  1075.         if (ptxdata8bits == NULL)
  1076.         {
  1077.           husart->Instance->TDR = (uint16_t)(*ptxdata16bits & uhMask);
  1078.           ptxdata16bits++;
  1079.         }
  1080.         else
  1081.         {
  1082.           husart->Instance->TDR = (uint8_t)(*ptxdata8bits & (uint8_t)(uhMask & 0xFFU));
  1083.           ptxdata8bits++;
  1084.         }
  1085.  
  1086.         husart->TxXferCount--;
  1087.       }
  1088.  
  1089.       if (husart->RxXferCount > 0U)
  1090.       {
  1091.         /* Wait for RXNE Flag */
  1092.         if (USART_WaitOnFlagUntilTimeout(husart, USART_FLAG_RXNE, RESET, tickstart, Timeout) != HAL_OK)
  1093.         {
  1094.           return HAL_TIMEOUT;
  1095.         }
  1096.  
  1097.         if (prxdata8bits == NULL)
  1098.         {
  1099.           *prxdata16bits = (uint16_t)(husart->Instance->RDR & uhMask);
  1100.           prxdata16bits++;
  1101.         }
  1102.         else
  1103.         {
  1104.           *prxdata8bits = (uint8_t)(husart->Instance->RDR & (uint8_t)(uhMask & 0xFFU));
  1105.           prxdata8bits++;
  1106.         }
  1107.  
  1108.         husart->RxXferCount--;
  1109.       }
  1110.       rxdatacount = husart->RxXferCount;
  1111.     }
  1112.  
  1113.     /* At end of TxRx process, restore husart->State to Ready */
  1114.     husart->State = HAL_USART_STATE_READY;
  1115.  
  1116.     /* Process Unlocked */
  1117.     __HAL_UNLOCK(husart);
  1118.  
  1119.     return HAL_OK;
  1120.   }
  1121.   else
  1122.   {
  1123.     return HAL_BUSY;
  1124.   }
  1125. }
  1126.  
  1127. /**
  1128.   * @brief  Send an amount of data in interrupt mode.
  1129.   * @note   When UART parity is not enabled (PCE = 0), and Word Length is configured to 9 bits (M1-M0 = 01),
  1130.   *         the sent data is handled as a set of u16. In this case, Size must indicate the number
  1131.   *         of u16 provided through pTxData.
  1132.   * @note   When UART parity is not enabled (PCE = 0), and Word Length is configured to 9 bits (M1-M0 = 01),
  1133.   *         address of user data buffer containing data to be sent, should be aligned on a half word frontier (16 bits)
  1134.   *         (as sent data will be handled using u16 pointer cast). Depending on compilation chain,
  1135.   *         use of specific alignment compilation directives or pragmas might be required to ensure proper alignment for pTxData.
  1136.   * @param  husart USART handle.
  1137.   * @param  pTxData pointer to data buffer (u8 or u16 data elements).
  1138.   * @param  Size amount of data elements (u8 or u16) to be sent.
  1139.   * @retval HAL status
  1140.   */
  1141. HAL_StatusTypeDef HAL_USART_Transmit_IT(USART_HandleTypeDef *husart, uint8_t *pTxData, uint16_t Size)
  1142. {
  1143.   if (husart->State == HAL_USART_STATE_READY)
  1144.   {
  1145.     if ((pTxData == NULL) || (Size == 0U))
  1146.     {
  1147.       return HAL_ERROR;
  1148.     }
  1149.  
  1150.     /* In case of 9bits/No Parity transfer, pTxData buffer provided as input parameter
  1151.        should be aligned on a u16 frontier, as data to be filled into TDR will be
  1152.        handled through a u16 cast. */
  1153.     if ((husart->Init.WordLength == USART_WORDLENGTH_9B) && (husart->Init.Parity == USART_PARITY_NONE))
  1154.     {
  1155.       if ((((uint32_t)pTxData) & 1U) != 0U)
  1156.       {
  1157.         return  HAL_ERROR;
  1158.       }
  1159.     }
  1160.  
  1161.     /* Process Locked */
  1162.     __HAL_LOCK(husart);
  1163.  
  1164.     husart->pTxBuffPtr  = pTxData;
  1165.     husart->TxXferSize  = Size;
  1166.     husart->TxXferCount = Size;
  1167.     husart->TxISR       = NULL;
  1168.  
  1169.     husart->ErrorCode = HAL_USART_ERROR_NONE;
  1170.     husart->State     = HAL_USART_STATE_BUSY_TX;
  1171.  
  1172.     /* The USART Error Interrupts: (Frame error, noise error, overrun error)
  1173.     are not managed by the USART Transmit Process to avoid the overrun interrupt
  1174.     when the usart mode is configured for transmit and receive "USART_MODE_TX_RX"
  1175.     to benefit for the frame error and noise interrupts the usart mode should be
  1176.     configured only for transmit "USART_MODE_TX" */
  1177.  
  1178.     {
  1179.       /* Set the Tx ISR function pointer according to the data word length */
  1180.       if ((husart->Init.WordLength == USART_WORDLENGTH_9B) && (husart->Init.Parity == USART_PARITY_NONE))
  1181.       {
  1182.         husart->TxISR = USART_TxISR_16BIT;
  1183.       }
  1184.       else
  1185.       {
  1186.         husart->TxISR = USART_TxISR_8BIT;
  1187.       }
  1188.  
  1189.       /* Process Unlocked */
  1190.       __HAL_UNLOCK(husart);
  1191.  
  1192.       /* Enable the USART Transmit Data Register Empty Interrupt */
  1193.       __HAL_USART_ENABLE_IT(husart, USART_IT_TXE);
  1194.     }
  1195.  
  1196.     return HAL_OK;
  1197.   }
  1198.   else
  1199.   {
  1200.     return HAL_BUSY;
  1201.   }
  1202. }
  1203.  
  1204. /**
  1205.   * @brief Receive an amount of data in interrupt mode.
  1206.   * @note   To receive synchronous data, dummy data are simultaneously transmitted.
  1207.   * @note   When UART parity is not enabled (PCE = 0), and Word Length is configured to 9 bits (M1-M0 = 01),
  1208.   *         the received data is handled as a set of u16. In this case, Size must indicate the number
  1209.   *         of u16 available through pRxData.
  1210.   * @note   When UART parity is not enabled (PCE = 0), and Word Length is configured to 9 bits (M1-M0 = 01),
  1211.   *         address of user data buffer for storing data to be received, should be aligned on a half word frontier (16 bits)
  1212.   *         (as received data will be handled using u16 pointer cast). Depending on compilation chain,
  1213.   *         use of specific alignment compilation directives or pragmas might be required to ensure proper alignment for pRxData.
  1214.   * @param  husart USART handle.
  1215.   * @param  pRxData pointer to data buffer (u8 or u16 data elements).
  1216.   * @param  Size amount of data elements (u8 or u16) to be received.
  1217.   * @retval HAL status
  1218.   */
  1219. HAL_StatusTypeDef HAL_USART_Receive_IT(USART_HandleTypeDef *husart, uint8_t *pRxData, uint16_t Size)
  1220. {
  1221.  
  1222.   if (husart->State == HAL_USART_STATE_READY)
  1223.   {
  1224.     if ((pRxData == NULL) || (Size == 0U))
  1225.     {
  1226.       return HAL_ERROR;
  1227.     }
  1228.  
  1229.     /* In case of 9bits/No Parity transfer, pRxData buffer provided as input parameter
  1230.        should be aligned on a u16 frontier, as data to be received from RDR will be
  1231.        handled through a u16 cast. */
  1232.     if ((husart->Init.WordLength == USART_WORDLENGTH_9B) && (husart->Init.Parity == USART_PARITY_NONE))
  1233.     {
  1234.       if ((((uint32_t)pRxData) & 1U) != 0U)
  1235.       {
  1236.         return  HAL_ERROR;
  1237.       }
  1238.     }
  1239.  
  1240.     /* Process Locked */
  1241.     __HAL_LOCK(husart);
  1242.  
  1243.     husart->pRxBuffPtr  = pRxData;
  1244.     husart->RxXferSize  = Size;
  1245.     husart->RxXferCount = Size;
  1246.     husart->RxISR       = NULL;
  1247.  
  1248.     USART_MASK_COMPUTATION(husart);
  1249.  
  1250.     husart->ErrorCode = HAL_USART_ERROR_NONE;
  1251.     husart->State = HAL_USART_STATE_BUSY_RX;
  1252.  
  1253.     /* Enable the USART Error Interrupt: (Frame error, noise error, overrun error) */
  1254.     SET_BIT(husart->Instance->CR3, USART_CR3_EIE);
  1255.  
  1256.     {
  1257.       /* Set the Rx ISR function pointer according to the data word length */
  1258.       if ((husart->Init.WordLength == USART_WORDLENGTH_9B) && (husart->Init.Parity == USART_PARITY_NONE))
  1259.       {
  1260.         husart->RxISR = USART_RxISR_16BIT;
  1261.       }
  1262.       else
  1263.       {
  1264.         husart->RxISR = USART_RxISR_8BIT;
  1265.       }
  1266.  
  1267.       /* Process Unlocked */
  1268.       __HAL_UNLOCK(husart);
  1269.  
  1270.       /* Enable the USART Parity Error and Data Register not empty Interrupts */
  1271.       SET_BIT(husart->Instance->CR1, USART_CR1_PEIE | USART_CR1_RXNEIE);
  1272.     }
  1273.  
  1274.     {
  1275.       /* Send dummy data in order to generate the clock for the Slave to send the next data.
  1276.       */
  1277.       {
  1278.         husart->Instance->TDR = (USART_DUMMY_DATA & (uint16_t)0x00FF);
  1279.       }
  1280.     }
  1281.  
  1282.     return HAL_OK;
  1283.   }
  1284.   else
  1285.   {
  1286.     return HAL_BUSY;
  1287.   }
  1288. }
  1289.  
  1290. /**
  1291.   * @brief Full-Duplex Send and Receive an amount of data in interrupt mode.
  1292.   * @note   When UART parity is not enabled (PCE = 0), and Word Length is configured to 9 bits (M1-M0 = 01),
  1293.   *         the sent data and the received data are handled as sets of u16. In this case, Size must indicate the number
  1294.   *         of u16 available through pTxData and through pRxData.
  1295.   * @note   When UART parity is not enabled (PCE = 0), and Word Length is configured to 9 bits (M1-M0 = 01),
  1296.   *         address of user data buffers containing data to be sent/received, should be aligned on a half word frontier (16 bits)
  1297.   *         (as sent/received data will be handled using u16 pointer cast). Depending on compilation chain,
  1298.   *         use of specific alignment compilation directives or pragmas might be required to ensure proper alignment for pTxData and pRxData.
  1299.   * @param  husart USART handle.
  1300.   * @param  pTxData pointer to TX data buffer (u8 or u16 data elements).
  1301.   * @param  pRxData pointer to RX data buffer (u8 or u16 data elements).
  1302.   * @param  Size amount of data elements (u8 or u16) to be sent (same amount to be received).
  1303.   * @retval HAL status
  1304.   */
  1305. HAL_StatusTypeDef HAL_USART_TransmitReceive_IT(USART_HandleTypeDef *husart, uint8_t *pTxData, uint8_t *pRxData,
  1306.                                                uint16_t Size)
  1307. {
  1308.  
  1309.   if (husart->State == HAL_USART_STATE_READY)
  1310.   {
  1311.     if ((pTxData == NULL) || (pRxData == NULL) || (Size == 0U))
  1312.     {
  1313.       return HAL_ERROR;
  1314.     }
  1315.  
  1316.     /* In case of 9bits/No Parity transfer, pTxData and pRxData buffers provided as input parameter
  1317.        should be aligned on a u16 frontier, as data to be filled into TDR/retrieved from RDR will be
  1318.        handled through a u16 cast. */
  1319.     if ((husart->Init.WordLength == USART_WORDLENGTH_9B) && (husart->Init.Parity == USART_PARITY_NONE))
  1320.     {
  1321.       if (((((uint32_t)pTxData) & 1U) != 0U) || ((((uint32_t)pRxData) & 1U) != 0U))
  1322.       {
  1323.         return  HAL_ERROR;
  1324.       }
  1325.     }
  1326.  
  1327.     /* Process Locked */
  1328.     __HAL_LOCK(husart);
  1329.  
  1330.     husart->pRxBuffPtr = pRxData;
  1331.     husart->RxXferSize = Size;
  1332.     husart->RxXferCount = Size;
  1333.     husart->pTxBuffPtr = pTxData;
  1334.     husart->TxXferSize = Size;
  1335.     husart->TxXferCount = Size;
  1336.  
  1337.     /* Computation of USART mask to apply to RDR register */
  1338.     USART_MASK_COMPUTATION(husart);
  1339.  
  1340.     husart->ErrorCode = HAL_USART_ERROR_NONE;
  1341.     husart->State = HAL_USART_STATE_BUSY_TX_RX;
  1342.  
  1343.     {
  1344.       if ((husart->Init.WordLength == USART_WORDLENGTH_9B) && (husart->Init.Parity == USART_PARITY_NONE))
  1345.       {
  1346.         husart->TxISR = USART_TxISR_16BIT;
  1347.         husart->RxISR = USART_RxISR_16BIT;
  1348.       }
  1349.       else
  1350.       {
  1351.         husart->TxISR = USART_TxISR_8BIT;
  1352.         husart->RxISR = USART_RxISR_8BIT;
  1353.       }
  1354.  
  1355.       /* Process Locked */
  1356.       __HAL_UNLOCK(husart);
  1357.  
  1358.       /* Enable the USART Error Interrupt: (Frame error, noise error, overrun error) */
  1359.       SET_BIT(husart->Instance->CR3, USART_CR3_EIE);
  1360.  
  1361.       /* Enable the USART Parity Error and USART Data Register not empty Interrupts */
  1362.       SET_BIT(husart->Instance->CR1, USART_CR1_PEIE | USART_CR1_RXNEIE);
  1363.  
  1364.       /* Enable the USART Transmit Data Register Empty Interrupt */
  1365.       SET_BIT(husart->Instance->CR1, USART_CR1_TXEIE);
  1366.     }
  1367.  
  1368.     return HAL_OK;
  1369.   }
  1370.   else
  1371.   {
  1372.     return HAL_BUSY;
  1373.   }
  1374. }
  1375.  
  1376. /**
  1377.   * @brief Send an amount of data in DMA mode.
  1378.   * @note   When UART parity is not enabled (PCE = 0), and Word Length is configured to 9 bits (M1-M0 = 01),
  1379.   *         the sent data is handled as a set of u16. In this case, Size must indicate the number
  1380.   *         of u16 provided through pTxData.
  1381.   * @note   When UART parity is not enabled (PCE = 0), and Word Length is configured to 9 bits (M1-M0 = 01),
  1382.   *         address of user data buffer containing data to be sent, should be aligned on a half word frontier (16 bits)
  1383.   *         (as sent data will be handled by DMA from halfword frontier). Depending on compilation chain,
  1384.   *         use of specific alignment compilation directives or pragmas might be required to ensure proper alignment for pTxData.
  1385.   * @param  husart USART handle.
  1386.   * @param  pTxData pointer to data buffer (u8 or u16 data elements).
  1387.   * @param  Size amount of data elements (u8 or u16) to be sent.
  1388.   * @retval HAL status
  1389.   */
  1390. HAL_StatusTypeDef HAL_USART_Transmit_DMA(USART_HandleTypeDef *husart, uint8_t *pTxData, uint16_t Size)
  1391. {
  1392.   HAL_StatusTypeDef status = HAL_OK;
  1393.   uint32_t *tmp;
  1394.  
  1395.   if (husart->State == HAL_USART_STATE_READY)
  1396.   {
  1397.     if ((pTxData == NULL) || (Size == 0U))
  1398.     {
  1399.       return HAL_ERROR;
  1400.     }
  1401.  
  1402.     /* In case of 9bits/No Parity transfer, pTxData buffer provided as input parameter
  1403.        should be aligned on a u16 frontier, as data copy into TDR will be
  1404.        handled by DMA from a u16 frontier. */
  1405.     if ((husart->Init.WordLength == USART_WORDLENGTH_9B) && (husart->Init.Parity == USART_PARITY_NONE))
  1406.     {
  1407.       if ((((uint32_t)pTxData) & 1U) != 0U)
  1408.       {
  1409.         return  HAL_ERROR;
  1410.       }
  1411.     }
  1412.  
  1413.     /* Process Locked */
  1414.     __HAL_LOCK(husart);
  1415.  
  1416.     husart->pTxBuffPtr = pTxData;
  1417.     husart->TxXferSize = Size;
  1418.     husart->TxXferCount = Size;
  1419.  
  1420.     husart->ErrorCode = HAL_USART_ERROR_NONE;
  1421.     husart->State = HAL_USART_STATE_BUSY_TX;
  1422.  
  1423.     if (husart->hdmatx != NULL)
  1424.     {
  1425.       /* Set the USART DMA transfer complete callback */
  1426.       husart->hdmatx->XferCpltCallback = USART_DMATransmitCplt;
  1427.  
  1428.       /* Set the USART DMA Half transfer complete callback */
  1429.       husart->hdmatx->XferHalfCpltCallback = USART_DMATxHalfCplt;
  1430.  
  1431.       /* Set the DMA error callback */
  1432.       husart->hdmatx->XferErrorCallback = USART_DMAError;
  1433.  
  1434.       /* Enable the USART transmit DMA channel */
  1435.       tmp = (uint32_t *)&pTxData;
  1436.       status = HAL_DMA_Start_IT(husart->hdmatx, *(uint32_t *)tmp, (uint32_t)&husart->Instance->TDR, Size);
  1437.     }
  1438.  
  1439.     if (status == HAL_OK)
  1440.     {
  1441.       /* Clear the TC flag in the ICR register */
  1442.       __HAL_USART_CLEAR_FLAG(husart, USART_CLEAR_TCF);
  1443.  
  1444.       /* Process Unlocked */
  1445.       __HAL_UNLOCK(husart);
  1446.  
  1447.       /* Enable the DMA transfer for transmit request by setting the DMAT bit
  1448.          in the USART CR3 register */
  1449.       SET_BIT(husart->Instance->CR3, USART_CR3_DMAT);
  1450.  
  1451.       return HAL_OK;
  1452.     }
  1453.     else
  1454.     {
  1455.       /* Set error code to DMA */
  1456.       husart->ErrorCode = HAL_USART_ERROR_DMA;
  1457.  
  1458.       /* Process Unlocked */
  1459.       __HAL_UNLOCK(husart);
  1460.  
  1461.       /* Restore husart->State to ready */
  1462.       husart->State = HAL_USART_STATE_READY;
  1463.  
  1464.       return HAL_ERROR;
  1465.     }
  1466.   }
  1467.   else
  1468.   {
  1469.     return HAL_BUSY;
  1470.   }
  1471. }
  1472.  
  1473. /**
  1474.   * @brief Receive an amount of data in DMA mode.
  1475.   * @note   When the USART parity is enabled (PCE = 1), the received data contain
  1476.   *         the parity bit (MSB position).
  1477.   * @note   The USART DMA transmit channel must be configured in order to generate the clock for the slave.
  1478.   * @note   When UART parity is not enabled (PCE = 0), and Word Length is configured to 9 bits (M1-M0 = 01),
  1479.   *         the received data is handled as a set of u16. In this case, Size must indicate the number
  1480.   *         of u16 available through pRxData.
  1481.   * @note   When UART parity is not enabled (PCE = 0), and Word Length is configured to 9 bits (M1-M0 = 01),
  1482.   *         address of user data buffer for storing data to be received, should be aligned on a half word frontier (16 bits)
  1483.   *         (as received data will be handled by DMA from halfword frontier). Depending on compilation chain,
  1484.   *         use of specific alignment compilation directives or pragmas might be required to ensure proper alignment for pRxData.
  1485.   * @param  husart USART handle.
  1486.   * @param  pRxData pointer to data buffer (u8 or u16 data elements).
  1487.   * @param  Size amount of data elements (u8 or u16) to be received.
  1488.   * @retval HAL status
  1489.   */
  1490. HAL_StatusTypeDef HAL_USART_Receive_DMA(USART_HandleTypeDef *husart, uint8_t *pRxData, uint16_t Size)
  1491. {
  1492.   HAL_StatusTypeDef status = HAL_OK;
  1493.   uint32_t *tmp = (uint32_t *)&pRxData;
  1494.  
  1495.   /* Check that a Rx process is not already ongoing */
  1496.   if (husart->State == HAL_USART_STATE_READY)
  1497.   {
  1498.     if ((pRxData == NULL) || (Size == 0U))
  1499.     {
  1500.       return HAL_ERROR;
  1501.     }
  1502.  
  1503.     /* In case of 9bits/No Parity transfer, pRxData buffer provided as input parameter
  1504.        should be aligned on a u16 frontier, as data copy from RDR will be
  1505.        handled by DMA from a u16 frontier. */
  1506.     if ((husart->Init.WordLength == USART_WORDLENGTH_9B) && (husart->Init.Parity == USART_PARITY_NONE))
  1507.     {
  1508.       if ((((uint32_t)pRxData) & 1U) != 0U)
  1509.       {
  1510.         return  HAL_ERROR;
  1511.       }
  1512.     }
  1513.  
  1514.     /* Process Locked */
  1515.     __HAL_LOCK(husart);
  1516.  
  1517.     husart->pRxBuffPtr = pRxData;
  1518.     husart->RxXferSize = Size;
  1519.     husart->pTxBuffPtr = pRxData;
  1520.     husart->TxXferSize = Size;
  1521.  
  1522.     husart->ErrorCode = HAL_USART_ERROR_NONE;
  1523.     husart->State = HAL_USART_STATE_BUSY_RX;
  1524.  
  1525.     if (husart->hdmarx != NULL)
  1526.     {
  1527.       /* Set the USART DMA Rx transfer complete callback */
  1528.       husart->hdmarx->XferCpltCallback = USART_DMAReceiveCplt;
  1529.  
  1530.       /* Set the USART DMA Half transfer complete callback */
  1531.       husart->hdmarx->XferHalfCpltCallback = USART_DMARxHalfCplt;
  1532.  
  1533.       /* Set the USART DMA Rx transfer error callback */
  1534.       husart->hdmarx->XferErrorCallback = USART_DMAError;
  1535.  
  1536.       /* Enable the USART receive DMA channel */
  1537.       status = HAL_DMA_Start_IT(husart->hdmarx, (uint32_t)&husart->Instance->RDR, *(uint32_t *)tmp, Size);
  1538.     }
  1539.  
  1540.     {
  1541.       /* Enable the USART transmit DMA channel: the transmit channel is used in order
  1542.          to generate in the non-blocking mode the clock to the slave device,
  1543.          this mode isn't a simplex receive mode but a full-duplex receive mode */
  1544.  
  1545.       /* Set the USART DMA Tx Complete and Error callback to Null */
  1546.       if (husart->hdmatx != NULL)
  1547.       {
  1548.         husart->hdmatx->XferErrorCallback = NULL;
  1549.         husart->hdmatx->XferHalfCpltCallback = NULL;
  1550.         husart->hdmatx->XferCpltCallback = NULL;
  1551.         status = HAL_DMA_Start_IT(husart->hdmatx, *(uint32_t *)tmp, (uint32_t)&husart->Instance->TDR, Size);
  1552.       }
  1553.     }
  1554.  
  1555.     if (status == HAL_OK)
  1556.     {
  1557.       /* Process Unlocked */
  1558.       __HAL_UNLOCK(husart);
  1559.  
  1560.       /* Enable the USART Parity Error Interrupt */
  1561.       SET_BIT(husart->Instance->CR1, USART_CR1_PEIE);
  1562.  
  1563.       /* Enable the USART Error Interrupt: (Frame error, noise error, overrun error) */
  1564.       SET_BIT(husart->Instance->CR3, USART_CR3_EIE);
  1565.  
  1566.       /* Enable the DMA transfer for the receiver request by setting the DMAR bit
  1567.          in the USART CR3 register */
  1568.       SET_BIT(husart->Instance->CR3, USART_CR3_DMAR);
  1569.  
  1570.       /* Enable the DMA transfer for transmit request by setting the DMAT bit
  1571.          in the USART CR3 register */
  1572.       SET_BIT(husart->Instance->CR3, USART_CR3_DMAT);
  1573.  
  1574.       return HAL_OK;
  1575.     }
  1576.     else
  1577.     {
  1578.       if (husart->hdmarx != NULL)
  1579.       {
  1580.         status = HAL_DMA_Abort(husart->hdmarx);
  1581.       }
  1582.  
  1583.       /* No need to check on error code */
  1584.       UNUSED(status);
  1585.  
  1586.       /* Set error code to DMA */
  1587.       husart->ErrorCode = HAL_USART_ERROR_DMA;
  1588.  
  1589.       /* Process Unlocked */
  1590.       __HAL_UNLOCK(husart);
  1591.  
  1592.       /* Restore husart->State to ready */
  1593.       husart->State = HAL_USART_STATE_READY;
  1594.  
  1595.       return HAL_ERROR;
  1596.     }
  1597.   }
  1598.   else
  1599.   {
  1600.     return HAL_BUSY;
  1601.   }
  1602. }
  1603.  
  1604. /**
  1605.   * @brief Full-Duplex Transmit Receive an amount of data in non-blocking mode.
  1606.   * @note   When the USART parity is enabled (PCE = 1) the data received contain the parity bit.
  1607.   * @note   When UART parity is not enabled (PCE = 0), and Word Length is configured to 9 bits (M1-M0 = 01),
  1608.   *         the sent data and the received data are handled as sets of u16. In this case, Size must indicate the number
  1609.   *         of u16 available through pTxData and through pRxData.
  1610.   * @note   When UART parity is not enabled (PCE = 0), and Word Length is configured to 9 bits (M1-M0 = 01),
  1611.   *         address of user data buffers containing data to be sent/received, should be aligned on a half word frontier (16 bits)
  1612.   *         (as sent/received data will be handled by DMA from halfword frontier). Depending on compilation chain,
  1613.   *         use of specific alignment compilation directives or pragmas might be required to ensure proper alignment for pTxData and pRxData.
  1614.   * @param  husart USART handle.
  1615.   * @param  pTxData pointer to TX data buffer (u8 or u16 data elements).
  1616.   * @param  pRxData pointer to RX data buffer (u8 or u16 data elements).
  1617.   * @param  Size amount of data elements (u8 or u16) to be received/sent.
  1618.   * @retval HAL status
  1619.   */
  1620. HAL_StatusTypeDef HAL_USART_TransmitReceive_DMA(USART_HandleTypeDef *husart, uint8_t *pTxData, uint8_t *pRxData,
  1621.                                                 uint16_t Size)
  1622. {
  1623.   HAL_StatusTypeDef status;
  1624.   uint32_t *tmp;
  1625.  
  1626.   if (husart->State == HAL_USART_STATE_READY)
  1627.   {
  1628.     if ((pTxData == NULL) || (pRxData == NULL) || (Size == 0U))
  1629.     {
  1630.       return HAL_ERROR;
  1631.     }
  1632.  
  1633.     /* In case of 9bits/No Parity transfer, pTxData and pRxData buffers provided as input parameter
  1634.        should be aligned on a u16 frontier, as data copy to/from TDR/RDR will be
  1635.        handled by DMA from a u16 frontier. */
  1636.     if ((husart->Init.WordLength == USART_WORDLENGTH_9B) && (husart->Init.Parity == USART_PARITY_NONE))
  1637.     {
  1638.       if (((((uint32_t)pTxData) & 1U) != 0U) || ((((uint32_t)pRxData) & 1U) != 0U))
  1639.       {
  1640.         return  HAL_ERROR;
  1641.       }
  1642.     }
  1643.  
  1644.     /* Process Locked */
  1645.     __HAL_LOCK(husart);
  1646.  
  1647.     husart->pRxBuffPtr = pRxData;
  1648.     husart->RxXferSize = Size;
  1649.     husart->pTxBuffPtr = pTxData;
  1650.     husart->TxXferSize = Size;
  1651.  
  1652.     husart->ErrorCode = HAL_USART_ERROR_NONE;
  1653.     husart->State = HAL_USART_STATE_BUSY_TX_RX;
  1654.  
  1655.     if ((husart->hdmarx != NULL) && (husart->hdmatx != NULL))
  1656.     {
  1657.       /* Set the USART DMA Rx transfer complete callback */
  1658.       husart->hdmarx->XferCpltCallback = USART_DMAReceiveCplt;
  1659.  
  1660.       /* Set the USART DMA Half transfer complete callback */
  1661.       husart->hdmarx->XferHalfCpltCallback = USART_DMARxHalfCplt;
  1662.  
  1663.       /* Set the USART DMA Tx transfer complete callback */
  1664.       husart->hdmatx->XferCpltCallback = USART_DMATransmitCplt;
  1665.  
  1666.       /* Set the USART DMA Half transfer complete callback */
  1667.       husart->hdmatx->XferHalfCpltCallback = USART_DMATxHalfCplt;
  1668.  
  1669.       /* Set the USART DMA Tx transfer error callback */
  1670.       husart->hdmatx->XferErrorCallback = USART_DMAError;
  1671.  
  1672.       /* Set the USART DMA Rx transfer error callback */
  1673.       husart->hdmarx->XferErrorCallback = USART_DMAError;
  1674.  
  1675.       /* Enable the USART receive DMA channel */
  1676.       tmp = (uint32_t *)&pRxData;
  1677.       status = HAL_DMA_Start_IT(husart->hdmarx, (uint32_t)&husart->Instance->RDR, *(uint32_t *)tmp, Size);
  1678.  
  1679.       /* Enable the USART transmit DMA channel */
  1680.       if (status == HAL_OK)
  1681.       {
  1682.         tmp = (uint32_t *)&pTxData;
  1683.         status = HAL_DMA_Start_IT(husart->hdmatx, *(uint32_t *)tmp, (uint32_t)&husart->Instance->TDR, Size);
  1684.       }
  1685.     }
  1686.     else
  1687.     {
  1688.       status = HAL_ERROR;
  1689.     }
  1690.  
  1691.     if (status == HAL_OK)
  1692.     {
  1693.       /* Process Unlocked */
  1694.       __HAL_UNLOCK(husart);
  1695.  
  1696.       /* Enable the USART Parity Error Interrupt */
  1697.       SET_BIT(husart->Instance->CR1, USART_CR1_PEIE);
  1698.  
  1699.       /* Enable the USART Error Interrupt: (Frame error, noise error, overrun error) */
  1700.       SET_BIT(husart->Instance->CR3, USART_CR3_EIE);
  1701.  
  1702.       /* Clear the TC flag in the ICR register */
  1703.       __HAL_USART_CLEAR_FLAG(husart, USART_CLEAR_TCF);
  1704.  
  1705.       /* Enable the DMA transfer for the receiver request by setting the DMAR bit
  1706.          in the USART CR3 register */
  1707.       SET_BIT(husart->Instance->CR3, USART_CR3_DMAR);
  1708.  
  1709.       /* Enable the DMA transfer for transmit request by setting the DMAT bit
  1710.          in the USART CR3 register */
  1711.       SET_BIT(husart->Instance->CR3, USART_CR3_DMAT);
  1712.  
  1713.       return HAL_OK;
  1714.     }
  1715.     else
  1716.     {
  1717.       if (husart->hdmarx != NULL)
  1718.       {
  1719.         status = HAL_DMA_Abort(husart->hdmarx);
  1720.       }
  1721.  
  1722.       /* No need to check on error code */
  1723.       UNUSED(status);
  1724.  
  1725.       /* Set error code to DMA */
  1726.       husart->ErrorCode = HAL_USART_ERROR_DMA;
  1727.  
  1728.       /* Process Unlocked */
  1729.       __HAL_UNLOCK(husart);
  1730.  
  1731.       /* Restore husart->State to ready */
  1732.       husart->State = HAL_USART_STATE_READY;
  1733.  
  1734.       return HAL_ERROR;
  1735.     }
  1736.   }
  1737.   else
  1738.   {
  1739.     return HAL_BUSY;
  1740.   }
  1741. }
  1742.  
  1743. /**
  1744.   * @brief Pause the DMA Transfer.
  1745.   * @param  husart USART handle.
  1746.   * @retval HAL status
  1747.   */
  1748. HAL_StatusTypeDef HAL_USART_DMAPause(USART_HandleTypeDef *husart)
  1749. {
  1750.   const HAL_USART_StateTypeDef state = husart->State;
  1751.  
  1752.   /* Process Locked */
  1753.   __HAL_LOCK(husart);
  1754.  
  1755.   if ((HAL_IS_BIT_SET(husart->Instance->CR3, USART_CR3_DMAT)) &&
  1756.       (state == HAL_USART_STATE_BUSY_TX))
  1757.   {
  1758.     /* Disable the USART DMA Tx request */
  1759.     CLEAR_BIT(husart->Instance->CR3, USART_CR3_DMAT);
  1760.   }
  1761.   else if ((state == HAL_USART_STATE_BUSY_RX) ||
  1762.            (state == HAL_USART_STATE_BUSY_TX_RX))
  1763.   {
  1764.     if (HAL_IS_BIT_SET(husart->Instance->CR3, USART_CR3_DMAT))
  1765.     {
  1766.       /* Disable the USART DMA Tx request */
  1767.       CLEAR_BIT(husart->Instance->CR3, USART_CR3_DMAT);
  1768.     }
  1769.     if (HAL_IS_BIT_SET(husart->Instance->CR3, USART_CR3_DMAR))
  1770.     {
  1771.       /* Disable PE and ERR (Frame error, noise error, overrun error) interrupts */
  1772.       CLEAR_BIT(husart->Instance->CR1, USART_CR1_PEIE);
  1773.       CLEAR_BIT(husart->Instance->CR3, USART_CR3_EIE);
  1774.  
  1775.       /* Disable the USART DMA Rx request */
  1776.       CLEAR_BIT(husart->Instance->CR3, USART_CR3_DMAR);
  1777.     }
  1778.   }
  1779.   else
  1780.   {
  1781.     /* Nothing to do */
  1782.   }
  1783.  
  1784.   /* Process Unlocked */
  1785.   __HAL_UNLOCK(husart);
  1786.  
  1787.   return HAL_OK;
  1788. }
  1789.  
  1790. /**
  1791.   * @brief Resume the DMA Transfer.
  1792.   * @param  husart USART handle.
  1793.   * @retval HAL status
  1794.   */
  1795. HAL_StatusTypeDef HAL_USART_DMAResume(USART_HandleTypeDef *husart)
  1796. {
  1797.   const HAL_USART_StateTypeDef state = husart->State;
  1798.  
  1799.   /* Process Locked */
  1800.   __HAL_LOCK(husart);
  1801.  
  1802.   if (state == HAL_USART_STATE_BUSY_TX)
  1803.   {
  1804.     /* Enable the USART DMA Tx request */
  1805.     SET_BIT(husart->Instance->CR3, USART_CR3_DMAT);
  1806.   }
  1807.   else if ((state == HAL_USART_STATE_BUSY_RX) ||
  1808.            (state == HAL_USART_STATE_BUSY_TX_RX))
  1809.   {
  1810.     /* Clear the Overrun flag before resuming the Rx transfer*/
  1811.     __HAL_USART_CLEAR_FLAG(husart, USART_CLEAR_OREF);
  1812.  
  1813.     /* Reenable PE and ERR (Frame error, noise error, overrun error) interrupts */
  1814.     SET_BIT(husart->Instance->CR1, USART_CR1_PEIE);
  1815.     SET_BIT(husart->Instance->CR3, USART_CR3_EIE);
  1816.  
  1817.     /* Enable the USART DMA Rx request  before the DMA Tx request */
  1818.     SET_BIT(husart->Instance->CR3, USART_CR3_DMAR);
  1819.  
  1820.     /* Enable the USART DMA Tx request */
  1821.     SET_BIT(husart->Instance->CR3, USART_CR3_DMAT);
  1822.   }
  1823.   else
  1824.   {
  1825.     /* Nothing to do */
  1826.   }
  1827.  
  1828.   /* Process Unlocked */
  1829.   __HAL_UNLOCK(husart);
  1830.  
  1831.   return HAL_OK;
  1832. }
  1833.  
  1834. /**
  1835.   * @brief Stop the DMA Transfer.
  1836.   * @param  husart USART handle.
  1837.   * @retval HAL status
  1838.   */
  1839. HAL_StatusTypeDef HAL_USART_DMAStop(USART_HandleTypeDef *husart)
  1840. {
  1841.   /* The Lock is not implemented on this API to allow the user application
  1842.      to call the HAL USART API under callbacks HAL_USART_TxCpltCallback() / HAL_USART_RxCpltCallback() /
  1843.      HAL_USART_TxHalfCpltCallback / HAL_USART_RxHalfCpltCallback:
  1844.      indeed, when HAL_DMA_Abort() API is called, the DMA TX/RX Transfer or Half Transfer complete
  1845.      interrupt is generated if the DMA transfer interruption occurs at the middle or at the end of
  1846.      the stream and the corresponding call back is executed. */
  1847.  
  1848.   /* Disable the USART Tx/Rx DMA requests */
  1849.   CLEAR_BIT(husart->Instance->CR3, USART_CR3_DMAT);
  1850.   CLEAR_BIT(husart->Instance->CR3, USART_CR3_DMAR);
  1851.  
  1852.   /* Abort the USART DMA tx channel */
  1853.   if (husart->hdmatx != NULL)
  1854.   {
  1855.     if (HAL_DMA_Abort(husart->hdmatx) != HAL_OK)
  1856.     {
  1857.       if (HAL_DMA_GetError(husart->hdmatx) == HAL_DMA_ERROR_TIMEOUT)
  1858.       {
  1859.         /* Set error code to DMA */
  1860.         husart->ErrorCode = HAL_USART_ERROR_DMA;
  1861.  
  1862.         return HAL_TIMEOUT;
  1863.       }
  1864.     }
  1865.   }
  1866.   /* Abort the USART DMA rx channel */
  1867.   if (husart->hdmarx != NULL)
  1868.   {
  1869.     if (HAL_DMA_Abort(husart->hdmarx) != HAL_OK)
  1870.     {
  1871.       if (HAL_DMA_GetError(husart->hdmarx) == HAL_DMA_ERROR_TIMEOUT)
  1872.       {
  1873.         /* Set error code to DMA */
  1874.         husart->ErrorCode = HAL_USART_ERROR_DMA;
  1875.  
  1876.         return HAL_TIMEOUT;
  1877.       }
  1878.     }
  1879.   }
  1880.  
  1881.   USART_EndTransfer(husart);
  1882.   husart->State = HAL_USART_STATE_READY;
  1883.  
  1884.   return HAL_OK;
  1885. }
  1886.  
  1887. /**
  1888.   * @brief  Abort ongoing transfers (blocking mode).
  1889.   * @param  husart USART handle.
  1890.   * @note   This procedure could be used for aborting any ongoing transfer started in Interrupt or DMA mode.
  1891.   *         This procedure performs following operations :
  1892.   *           - Disable USART Interrupts (Tx and Rx)
  1893.   *           - Disable the DMA transfer in the peripheral register (if enabled)
  1894.   *           - Abort DMA transfer by calling HAL_DMA_Abort (in case of transfer in DMA mode)
  1895.   *           - Set handle State to READY
  1896.   * @note   This procedure is executed in blocking mode : when exiting function, Abort is considered as completed.
  1897.   * @retval HAL status
  1898.   */
  1899. HAL_StatusTypeDef HAL_USART_Abort(USART_HandleTypeDef *husart)
  1900. {
  1901.   CLEAR_BIT(husart->Instance->CR1, (USART_CR1_RXNEIE | USART_CR1_PEIE | USART_CR1_TXEIE | USART_CR1_TCIE));
  1902.   CLEAR_BIT(husart->Instance->CR3, USART_CR3_EIE);
  1903.  
  1904.   /* Disable the USART DMA Tx request if enabled */
  1905.   if (HAL_IS_BIT_SET(husart->Instance->CR3, USART_CR3_DMAT))
  1906.   {
  1907.     CLEAR_BIT(husart->Instance->CR3, USART_CR3_DMAT);
  1908.  
  1909.     /* Abort the USART DMA Tx channel : use blocking DMA Abort API (no callback) */
  1910.     if (husart->hdmatx != NULL)
  1911.     {
  1912.       /* Set the USART DMA Abort callback to Null.
  1913.          No call back execution at end of DMA abort procedure */
  1914.       husart->hdmatx->XferAbortCallback = NULL;
  1915.  
  1916.       if (HAL_DMA_Abort(husart->hdmatx) != HAL_OK)
  1917.       {
  1918.         if (HAL_DMA_GetError(husart->hdmatx) == HAL_DMA_ERROR_TIMEOUT)
  1919.         {
  1920.           /* Set error code to DMA */
  1921.           husart->ErrorCode = HAL_USART_ERROR_DMA;
  1922.  
  1923.           return HAL_TIMEOUT;
  1924.         }
  1925.       }
  1926.     }
  1927.   }
  1928.  
  1929.   /* Disable the USART DMA Rx request if enabled */
  1930.   if (HAL_IS_BIT_SET(husart->Instance->CR3, USART_CR3_DMAR))
  1931.   {
  1932.     CLEAR_BIT(husart->Instance->CR3, USART_CR3_DMAR);
  1933.  
  1934.     /* Abort the USART DMA Rx channel : use blocking DMA Abort API (no callback) */
  1935.     if (husart->hdmarx != NULL)
  1936.     {
  1937.       /* Set the USART DMA Abort callback to Null.
  1938.          No call back execution at end of DMA abort procedure */
  1939.       husart->hdmarx->XferAbortCallback = NULL;
  1940.  
  1941.       if (HAL_DMA_Abort(husart->hdmarx) != HAL_OK)
  1942.       {
  1943.         if (HAL_DMA_GetError(husart->hdmarx) == HAL_DMA_ERROR_TIMEOUT)
  1944.         {
  1945.           /* Set error code to DMA */
  1946.           husart->ErrorCode = HAL_USART_ERROR_DMA;
  1947.  
  1948.           return HAL_TIMEOUT;
  1949.         }
  1950.       }
  1951.     }
  1952.   }
  1953.  
  1954.   /* Reset Tx and Rx transfer counters */
  1955.   husart->TxXferCount = 0U;
  1956.   husart->RxXferCount = 0U;
  1957.  
  1958.   /* Clear the Error flags in the ICR register */
  1959.   __HAL_USART_CLEAR_FLAG(husart, USART_CLEAR_OREF | USART_CLEAR_NEF | USART_CLEAR_PEF | USART_CLEAR_FEF);
  1960.  
  1961.  
  1962.   /* Discard the received data */
  1963.   __HAL_USART_SEND_REQ(husart, USART_RXDATA_FLUSH_REQUEST);
  1964.  
  1965.   /* Restore husart->State to Ready */
  1966.   husart->State  = HAL_USART_STATE_READY;
  1967.  
  1968.   /* Reset Handle ErrorCode to No Error */
  1969.   husart->ErrorCode = HAL_USART_ERROR_NONE;
  1970.  
  1971.   return HAL_OK;
  1972. }
  1973.  
  1974. /**
  1975.   * @brief  Abort ongoing transfers (Interrupt mode).
  1976.   * @param  husart USART handle.
  1977.   * @note   This procedure could be used for aborting any ongoing transfer started in Interrupt or DMA mode.
  1978.   *         This procedure performs following operations :
  1979.   *           - Disable USART Interrupts (Tx and Rx)
  1980.   *           - Disable the DMA transfer in the peripheral register (if enabled)
  1981.   *           - Abort DMA transfer by calling HAL_DMA_Abort_IT (in case of transfer in DMA mode)
  1982.   *           - Set handle State to READY
  1983.   *           - At abort completion, call user abort complete callback
  1984.   * @note   This procedure is executed in Interrupt mode, meaning that abort procedure could be
  1985.   *         considered as completed only when user abort complete callback is executed (not when exiting function).
  1986.   * @retval HAL status
  1987.   */
  1988. HAL_StatusTypeDef HAL_USART_Abort_IT(USART_HandleTypeDef *husart)
  1989. {
  1990.   uint32_t abortcplt = 1U;
  1991.  
  1992.   CLEAR_BIT(husart->Instance->CR1, (USART_CR1_RXNEIE | USART_CR1_PEIE | USART_CR1_TXEIE | USART_CR1_TCIE));
  1993.   CLEAR_BIT(husart->Instance->CR3, USART_CR3_EIE);
  1994.  
  1995.   /* If DMA Tx and/or DMA Rx Handles are associated to USART Handle, DMA Abort complete callbacks should be initialised
  1996.      before any call to DMA Abort functions */
  1997.   /* DMA Tx Handle is valid */
  1998.   if (husart->hdmatx != NULL)
  1999.   {
  2000.     /* Set DMA Abort Complete callback if USART DMA Tx request if enabled.
  2001.        Otherwise, set it to NULL */
  2002.     if (HAL_IS_BIT_SET(husart->Instance->CR3, USART_CR3_DMAT))
  2003.     {
  2004.       husart->hdmatx->XferAbortCallback = USART_DMATxAbortCallback;
  2005.     }
  2006.     else
  2007.     {
  2008.       husart->hdmatx->XferAbortCallback = NULL;
  2009.     }
  2010.   }
  2011.   /* DMA Rx Handle is valid */
  2012.   if (husart->hdmarx != NULL)
  2013.   {
  2014.     /* Set DMA Abort Complete callback if USART DMA Rx request if enabled.
  2015.        Otherwise, set it to NULL */
  2016.     if (HAL_IS_BIT_SET(husart->Instance->CR3, USART_CR3_DMAR))
  2017.     {
  2018.       husart->hdmarx->XferAbortCallback = USART_DMARxAbortCallback;
  2019.     }
  2020.     else
  2021.     {
  2022.       husart->hdmarx->XferAbortCallback = NULL;
  2023.     }
  2024.   }
  2025.  
  2026.   /* Disable the USART DMA Tx request if enabled */
  2027.   if (HAL_IS_BIT_SET(husart->Instance->CR3, USART_CR3_DMAT))
  2028.   {
  2029.     /* Disable DMA Tx at USART level */
  2030.     CLEAR_BIT(husart->Instance->CR3, USART_CR3_DMAT);
  2031.  
  2032.     /* Abort the USART DMA Tx channel : use non blocking DMA Abort API (callback) */
  2033.     if (husart->hdmatx != NULL)
  2034.     {
  2035.       /* USART Tx DMA Abort callback has already been initialised :
  2036.          will lead to call HAL_USART_AbortCpltCallback() at end of DMA abort procedure */
  2037.  
  2038.       /* Abort DMA TX */
  2039.       if (HAL_DMA_Abort_IT(husart->hdmatx) != HAL_OK)
  2040.       {
  2041.         husart->hdmatx->XferAbortCallback = NULL;
  2042.       }
  2043.       else
  2044.       {
  2045.         abortcplt = 0U;
  2046.       }
  2047.     }
  2048.   }
  2049.  
  2050.   /* Disable the USART DMA Rx request if enabled */
  2051.   if (HAL_IS_BIT_SET(husart->Instance->CR3, USART_CR3_DMAR))
  2052.   {
  2053.     CLEAR_BIT(husart->Instance->CR3, USART_CR3_DMAR);
  2054.  
  2055.     /* Abort the USART DMA Rx channel : use non blocking DMA Abort API (callback) */
  2056.     if (husart->hdmarx != NULL)
  2057.     {
  2058.       /* USART Rx DMA Abort callback has already been initialised :
  2059.          will lead to call HAL_USART_AbortCpltCallback() at end of DMA abort procedure */
  2060.  
  2061.       /* Abort DMA RX */
  2062.       if (HAL_DMA_Abort_IT(husart->hdmarx) != HAL_OK)
  2063.       {
  2064.         husart->hdmarx->XferAbortCallback = NULL;
  2065.         abortcplt = 1U;
  2066.       }
  2067.       else
  2068.       {
  2069.         abortcplt = 0U;
  2070.       }
  2071.     }
  2072.   }
  2073.  
  2074.   /* if no DMA abort complete callback execution is required => call user Abort Complete callback */
  2075.   if (abortcplt == 1U)
  2076.   {
  2077.     /* Reset Tx and Rx transfer counters */
  2078.     husart->TxXferCount = 0U;
  2079.     husart->RxXferCount = 0U;
  2080.  
  2081.     /* Reset errorCode */
  2082.     husart->ErrorCode = HAL_USART_ERROR_NONE;
  2083.  
  2084.     /* Clear the Error flags in the ICR register */
  2085.     __HAL_USART_CLEAR_FLAG(husart, USART_CLEAR_OREF | USART_CLEAR_NEF | USART_CLEAR_PEF | USART_CLEAR_FEF);
  2086.  
  2087.  
  2088.     /* Discard the received data */
  2089.     __HAL_USART_SEND_REQ(husart, USART_RXDATA_FLUSH_REQUEST);
  2090.  
  2091.     /* Restore husart->State to Ready */
  2092.     husart->State  = HAL_USART_STATE_READY;
  2093.  
  2094.     /* As no DMA to be aborted, call directly user Abort complete callback */
  2095. #if (USE_HAL_USART_REGISTER_CALLBACKS == 1)
  2096.     /* Call registered Abort Complete Callback */
  2097.     husart->AbortCpltCallback(husart);
  2098. #else
  2099.     /* Call legacy weak Abort Complete Callback */
  2100.     HAL_USART_AbortCpltCallback(husart);
  2101. #endif /* USE_HAL_USART_REGISTER_CALLBACKS */
  2102.   }
  2103.  
  2104.   return HAL_OK;
  2105. }
  2106.  
  2107. /**
  2108.   * @brief  Handle USART interrupt request.
  2109.   * @param  husart USART handle.
  2110.   * @retval None
  2111.   */
  2112. void HAL_USART_IRQHandler(USART_HandleTypeDef *husart)
  2113. {
  2114.   uint32_t isrflags   = READ_REG(husart->Instance->ISR);
  2115.   uint32_t cr1its     = READ_REG(husart->Instance->CR1);
  2116.   uint32_t cr3its     = READ_REG(husart->Instance->CR3);
  2117.  
  2118.   uint32_t errorflags;
  2119.   uint32_t errorcode;
  2120.  
  2121.   /* If no error occurs */
  2122.   errorflags = (isrflags & (uint32_t)(USART_ISR_PE | USART_ISR_FE | USART_ISR_ORE | USART_ISR_NE));
  2123.   if (errorflags == 0U)
  2124.   {
  2125.     /* USART in mode Receiver ---------------------------------------------------*/
  2126.     if (((isrflags & USART_ISR_RXNE) != 0U)
  2127.         && ((cr1its & USART_CR1_RXNEIE) != 0U))
  2128.     {
  2129.       if (husart->RxISR != NULL)
  2130.       {
  2131.         husart->RxISR(husart);
  2132.       }
  2133.       return;
  2134.     }
  2135.   }
  2136.  
  2137.   /* If some errors occur */
  2138.   if ((errorflags != 0U)
  2139.       && (((cr3its & USART_CR3_EIE) != 0U)
  2140.           || ((cr1its & (USART_CR1_RXNEIE | USART_CR1_PEIE)) != 0U)))
  2141.   {
  2142.     /* USART parity error interrupt occurred -------------------------------------*/
  2143.     if (((isrflags & USART_ISR_PE) != 0U) && ((cr1its & USART_CR1_PEIE) != 0U))
  2144.     {
  2145.       __HAL_USART_CLEAR_IT(husart, USART_CLEAR_PEF);
  2146.  
  2147.       husart->ErrorCode |= HAL_USART_ERROR_PE;
  2148.     }
  2149.  
  2150.     /* USART frame error interrupt occurred --------------------------------------*/
  2151.     if (((isrflags & USART_ISR_FE) != 0U) && ((cr3its & USART_CR3_EIE) != 0U))
  2152.     {
  2153.       __HAL_USART_CLEAR_IT(husart, USART_CLEAR_FEF);
  2154.  
  2155.       husart->ErrorCode |= HAL_USART_ERROR_FE;
  2156.     }
  2157.  
  2158.     /* USART noise error interrupt occurred --------------------------------------*/
  2159.     if (((isrflags & USART_ISR_NE) != 0U) && ((cr3its & USART_CR3_EIE) != 0U))
  2160.     {
  2161.       __HAL_USART_CLEAR_IT(husart, USART_CLEAR_NEF);
  2162.  
  2163.       husart->ErrorCode |= HAL_USART_ERROR_NE;
  2164.     }
  2165.  
  2166.     /* USART Over-Run interrupt occurred -----------------------------------------*/
  2167.     if (((isrflags & USART_ISR_ORE) != 0U)
  2168.         && (((cr1its & USART_CR1_RXNEIE) != 0U) ||
  2169.             ((cr3its & USART_CR3_EIE) != 0U)))
  2170.     {
  2171.       __HAL_USART_CLEAR_IT(husart, USART_CLEAR_OREF);
  2172.  
  2173.       husart->ErrorCode |= HAL_USART_ERROR_ORE;
  2174.     }
  2175.  
  2176.  
  2177.     /* Call USART Error Call back function if need be --------------------------*/
  2178.     if (husart->ErrorCode != HAL_USART_ERROR_NONE)
  2179.     {
  2180.       /* USART in mode Receiver ---------------------------------------------------*/
  2181.       if (((isrflags & USART_ISR_RXNE) != 0U)
  2182.           && ((cr1its & USART_CR1_RXNEIE) != 0U))
  2183.       {
  2184.         if (husart->RxISR != NULL)
  2185.         {
  2186.           husart->RxISR(husart);
  2187.         }
  2188.       }
  2189.  
  2190.       /* If Overrun error occurs, or if any error occurs in DMA mode reception,
  2191.          consider error as blocking */
  2192.       errorcode = husart->ErrorCode & HAL_USART_ERROR_ORE;
  2193.       if ((HAL_IS_BIT_SET(husart->Instance->CR3, USART_CR3_DMAR)) ||
  2194.           (errorcode != 0U))
  2195.       {
  2196.         /* Blocking error : transfer is aborted
  2197.            Set the USART state ready to be able to start again the process,
  2198.            Disable Interrupts, and disable DMA requests, if ongoing */
  2199.         USART_EndTransfer(husart);
  2200.  
  2201.         /* Disable the USART DMA Rx request if enabled */
  2202.         if (HAL_IS_BIT_SET(husart->Instance->CR3, USART_CR3_DMAR))
  2203.         {
  2204.           CLEAR_BIT(husart->Instance->CR3, USART_CR3_DMAR | USART_CR3_DMAR);
  2205.  
  2206.           /* Abort the USART DMA Tx channel */
  2207.           if (husart->hdmatx != NULL)
  2208.           {
  2209.             /* Set the USART Tx DMA Abort callback to NULL : no callback
  2210.                executed at end of DMA abort procedure */
  2211.             husart->hdmatx->XferAbortCallback = NULL;
  2212.  
  2213.             /* Abort DMA TX */
  2214.             (void)HAL_DMA_Abort_IT(husart->hdmatx);
  2215.           }
  2216.  
  2217.           /* Abort the USART DMA Rx channel */
  2218.           if (husart->hdmarx != NULL)
  2219.           {
  2220.             /* Set the USART Rx DMA Abort callback :
  2221.                will lead to call HAL_USART_ErrorCallback() at end of DMA abort procedure */
  2222.             husart->hdmarx->XferAbortCallback = USART_DMAAbortOnError;
  2223.  
  2224.             /* Abort DMA RX */
  2225.             if (HAL_DMA_Abort_IT(husart->hdmarx) != HAL_OK)
  2226.             {
  2227.               /* Call Directly husart->hdmarx->XferAbortCallback function in case of error */
  2228.               husart->hdmarx->XferAbortCallback(husart->hdmarx);
  2229.             }
  2230.           }
  2231.           else
  2232.           {
  2233.             /* Call user error callback */
  2234. #if (USE_HAL_USART_REGISTER_CALLBACKS == 1)
  2235.             /* Call registered Error Callback */
  2236.             husart->ErrorCallback(husart);
  2237. #else
  2238.             /* Call legacy weak Error Callback */
  2239.             HAL_USART_ErrorCallback(husart);
  2240. #endif /* USE_HAL_USART_REGISTER_CALLBACKS */
  2241.           }
  2242.         }
  2243.         else
  2244.         {
  2245.           /* Call user error callback */
  2246. #if (USE_HAL_USART_REGISTER_CALLBACKS == 1)
  2247.           /* Call registered Error Callback */
  2248.           husart->ErrorCallback(husart);
  2249. #else
  2250.           /* Call legacy weak Error Callback */
  2251.           HAL_USART_ErrorCallback(husart);
  2252. #endif /* USE_HAL_USART_REGISTER_CALLBACKS */
  2253.         }
  2254.       }
  2255.       else
  2256.       {
  2257.         /* Non Blocking error : transfer could go on.
  2258.            Error is notified to user through user error callback */
  2259. #if (USE_HAL_USART_REGISTER_CALLBACKS == 1)
  2260.         /* Call registered Error Callback */
  2261.         husart->ErrorCallback(husart);
  2262. #else
  2263.         /* Call legacy weak Error Callback */
  2264.         HAL_USART_ErrorCallback(husart);
  2265. #endif /* USE_HAL_USART_REGISTER_CALLBACKS */
  2266.         husart->ErrorCode = HAL_USART_ERROR_NONE;
  2267.       }
  2268.     }
  2269.     return;
  2270.  
  2271.   } /* End if some error occurs */
  2272.  
  2273.  
  2274.   /* USART in mode Transmitter ------------------------------------------------*/
  2275.   if (((isrflags & USART_ISR_TXE) != 0U)
  2276.       && ((cr1its & USART_CR1_TXEIE) != 0U))
  2277.   {
  2278.     if (husart->TxISR != NULL)
  2279.     {
  2280.       husart->TxISR(husart);
  2281.     }
  2282.     return;
  2283.   }
  2284.  
  2285.   /* USART in mode Transmitter (transmission end) -----------------------------*/
  2286.   if (((isrflags & USART_ISR_TC) != 0U) && ((cr1its & USART_CR1_TCIE) != 0U))
  2287.   {
  2288.     USART_EndTransmit_IT(husart);
  2289.     return;
  2290.   }
  2291.  
  2292. }
  2293.  
  2294. /**
  2295.   * @brief Tx Transfer completed callback.
  2296.   * @param husart USART handle.
  2297.   * @retval None
  2298.   */
  2299. __weak void HAL_USART_TxCpltCallback(USART_HandleTypeDef *husart)
  2300. {
  2301.   /* Prevent unused argument(s) compilation warning */
  2302.   UNUSED(husart);
  2303.  
  2304.   /* NOTE : This function should not be modified, when the callback is needed,
  2305.             the HAL_USART_TxCpltCallback can be implemented in the user file.
  2306.    */
  2307. }
  2308.  
  2309. /**
  2310.   * @brief  Tx Half Transfer completed callback.
  2311.   * @param husart USART handle.
  2312.   * @retval None
  2313.   */
  2314. __weak void HAL_USART_TxHalfCpltCallback(USART_HandleTypeDef *husart)
  2315. {
  2316.   /* Prevent unused argument(s) compilation warning */
  2317.   UNUSED(husart);
  2318.  
  2319.   /* NOTE: This function should not be modified, when the callback is needed,
  2320.            the HAL_USART_TxHalfCpltCallback can be implemented in the user file.
  2321.    */
  2322. }
  2323.  
  2324. /**
  2325.   * @brief  Rx Transfer completed callback.
  2326.   * @param husart USART handle.
  2327.   * @retval None
  2328.   */
  2329. __weak void HAL_USART_RxCpltCallback(USART_HandleTypeDef *husart)
  2330. {
  2331.   /* Prevent unused argument(s) compilation warning */
  2332.   UNUSED(husart);
  2333.  
  2334.   /* NOTE: This function should not be modified, when the callback is needed,
  2335.            the HAL_USART_RxCpltCallback can be implemented in the user file.
  2336.    */
  2337. }
  2338.  
  2339. /**
  2340.   * @brief Rx Half Transfer completed callback.
  2341.   * @param husart USART handle.
  2342.   * @retval None
  2343.   */
  2344. __weak void HAL_USART_RxHalfCpltCallback(USART_HandleTypeDef *husart)
  2345. {
  2346.   /* Prevent unused argument(s) compilation warning */
  2347.   UNUSED(husart);
  2348.  
  2349.   /* NOTE : This function should not be modified, when the callback is needed,
  2350.             the HAL_USART_RxHalfCpltCallback can be implemented in the user file
  2351.    */
  2352. }
  2353.  
  2354. /**
  2355.   * @brief Tx/Rx Transfers completed callback for the non-blocking process.
  2356.   * @param husart USART handle.
  2357.   * @retval None
  2358.   */
  2359. __weak void HAL_USART_TxRxCpltCallback(USART_HandleTypeDef *husart)
  2360. {
  2361.   /* Prevent unused argument(s) compilation warning */
  2362.   UNUSED(husart);
  2363.  
  2364.   /* NOTE : This function should not be modified, when the callback is needed,
  2365.             the HAL_USART_TxRxCpltCallback can be implemented in the user file
  2366.    */
  2367. }
  2368.  
  2369. /**
  2370.   * @brief USART error callback.
  2371.   * @param husart USART handle.
  2372.   * @retval None
  2373.   */
  2374. __weak void HAL_USART_ErrorCallback(USART_HandleTypeDef *husart)
  2375. {
  2376.   /* Prevent unused argument(s) compilation warning */
  2377.   UNUSED(husart);
  2378.  
  2379.   /* NOTE : This function should not be modified, when the callback is needed,
  2380.             the HAL_USART_ErrorCallback can be implemented in the user file.
  2381.    */
  2382. }
  2383.  
  2384. /**
  2385.   * @brief  USART Abort Complete callback.
  2386.   * @param  husart USART handle.
  2387.   * @retval None
  2388.   */
  2389. __weak void HAL_USART_AbortCpltCallback(USART_HandleTypeDef *husart)
  2390. {
  2391.   /* Prevent unused argument(s) compilation warning */
  2392.   UNUSED(husart);
  2393.  
  2394.   /* NOTE : This function should not be modified, when the callback is needed,
  2395.             the HAL_USART_AbortCpltCallback can be implemented in the user file.
  2396.    */
  2397. }
  2398.  
  2399. /**
  2400.   * @}
  2401.   */
  2402.  
  2403. /** @defgroup USART_Exported_Functions_Group4 Peripheral State and Error functions
  2404.   *  @brief   USART Peripheral State and Error functions
  2405.   *
  2406. @verbatim
  2407.   ==============================================================================
  2408.             ##### Peripheral State and Error functions #####
  2409.   ==============================================================================
  2410.     [..]
  2411.     This subsection provides functions allowing to :
  2412.       (+) Return the USART handle state
  2413.       (+) Return the USART handle error code
  2414.  
  2415. @endverbatim
  2416.   * @{
  2417.   */
  2418.  
  2419.  
  2420. /**
  2421.   * @brief Return the USART handle state.
  2422.   * @param husart pointer to a USART_HandleTypeDef structure that contains
  2423.   *              the configuration information for the specified USART.
  2424.   * @retval USART handle state
  2425.   */
  2426. HAL_USART_StateTypeDef HAL_USART_GetState(USART_HandleTypeDef *husart)
  2427. {
  2428.   return husart->State;
  2429. }
  2430.  
  2431. /**
  2432.   * @brief Return the USART error code.
  2433.   * @param husart pointer to a USART_HandleTypeDef structure that contains
  2434.   *              the configuration information for the specified USART.
  2435.   * @retval USART handle Error Code
  2436.   */
  2437. uint32_t HAL_USART_GetError(USART_HandleTypeDef *husart)
  2438. {
  2439.   return husart->ErrorCode;
  2440. }
  2441.  
  2442. /**
  2443.   * @}
  2444.   */
  2445.  
  2446. /**
  2447.   * @}
  2448.   */
  2449.  
  2450. /** @defgroup USART_Private_Functions USART Private Functions
  2451.   * @{
  2452.   */
  2453.  
  2454. /**
  2455.   * @brief  Initialize the callbacks to their default values.
  2456.   * @param  husart USART handle.
  2457.   * @retval none
  2458.   */
  2459. #if (USE_HAL_USART_REGISTER_CALLBACKS == 1)
  2460. void USART_InitCallbacksToDefault(USART_HandleTypeDef *husart)
  2461. {
  2462.   /* Init the USART Callback settings */
  2463.   husart->TxHalfCpltCallback        = HAL_USART_TxHalfCpltCallback;        /* Legacy weak TxHalfCpltCallback        */
  2464.   husart->TxCpltCallback            = HAL_USART_TxCpltCallback;            /* Legacy weak TxCpltCallback            */
  2465.   husart->RxHalfCpltCallback        = HAL_USART_RxHalfCpltCallback;        /* Legacy weak RxHalfCpltCallback        */
  2466.   husart->RxCpltCallback            = HAL_USART_RxCpltCallback;            /* Legacy weak RxCpltCallback            */
  2467.   husart->TxRxCpltCallback          = HAL_USART_TxRxCpltCallback;          /* Legacy weak TxRxCpltCallback          */
  2468.   husart->ErrorCallback             = HAL_USART_ErrorCallback;             /* Legacy weak ErrorCallback             */
  2469.   husart->AbortCpltCallback         = HAL_USART_AbortCpltCallback;         /* Legacy weak AbortCpltCallback         */
  2470. }
  2471. #endif /* USE_HAL_USART_REGISTER_CALLBACKS */
  2472.  
  2473. /**
  2474.   * @brief  End ongoing transfer on USART peripheral (following error detection or Transfer completion).
  2475.   * @param  husart USART handle.
  2476.   * @retval None
  2477.   */
  2478. static void USART_EndTransfer(USART_HandleTypeDef *husart)
  2479. {
  2480.   /* Disable TXEIE, TCIE, RXNE, PE and ERR (Frame error, noise error, overrun error) interrupts */
  2481.   CLEAR_BIT(husart->Instance->CR1, (USART_CR1_RXNEIE | USART_CR1_PEIE | USART_CR1_TXEIE | USART_CR1_TCIE));
  2482.   CLEAR_BIT(husart->Instance->CR3, USART_CR3_EIE);
  2483.  
  2484.   /* At end of process, restore husart->State to Ready */
  2485.   husart->State = HAL_USART_STATE_READY;
  2486. }
  2487.  
  2488. /**
  2489.   * @brief DMA USART transmit process complete callback.
  2490.   * @param  hdma DMA handle.
  2491.   * @retval None
  2492.   */
  2493. static void USART_DMATransmitCplt(DMA_HandleTypeDef *hdma)
  2494. {
  2495.   USART_HandleTypeDef *husart = (USART_HandleTypeDef *)(hdma->Parent);
  2496.  
  2497.   /* DMA Normal mode */
  2498.   if (HAL_IS_BIT_CLR(hdma->Instance->CCR, DMA_CCR_CIRC))
  2499.   {
  2500.     husart->TxXferCount = 0U;
  2501.  
  2502.     if (husart->State == HAL_USART_STATE_BUSY_TX)
  2503.     {
  2504.       /* Disable the DMA transfer for transmit request by resetting the DMAT bit
  2505.          in the USART CR3 register */
  2506.       CLEAR_BIT(husart->Instance->CR3, USART_CR3_DMAT);
  2507.  
  2508.       /* Enable the USART Transmit Complete Interrupt */
  2509.       __HAL_USART_ENABLE_IT(husart, USART_IT_TC);
  2510.     }
  2511.   }
  2512.   /* DMA Circular mode */
  2513.   else
  2514.   {
  2515.     if (husart->State == HAL_USART_STATE_BUSY_TX)
  2516.     {
  2517. #if (USE_HAL_USART_REGISTER_CALLBACKS == 1)
  2518.       /* Call registered Tx Complete Callback */
  2519.       husart->TxCpltCallback(husart);
  2520. #else
  2521.       /* Call legacy weak Tx Complete Callback */
  2522.       HAL_USART_TxCpltCallback(husart);
  2523. #endif /* USE_HAL_USART_REGISTER_CALLBACKS */
  2524.     }
  2525.   }
  2526. }
  2527.  
  2528. /**
  2529.   * @brief DMA USART transmit process half complete callback.
  2530.   * @param  hdma DMA handle.
  2531.   * @retval None
  2532.   */
  2533. static void USART_DMATxHalfCplt(DMA_HandleTypeDef *hdma)
  2534. {
  2535.   USART_HandleTypeDef *husart = (USART_HandleTypeDef *)(hdma->Parent);
  2536.  
  2537. #if (USE_HAL_USART_REGISTER_CALLBACKS == 1)
  2538.   /* Call registered Tx Half Complete Callback */
  2539.   husart->TxHalfCpltCallback(husart);
  2540. #else
  2541.   /* Call legacy weak Tx Half Complete Callback */
  2542.   HAL_USART_TxHalfCpltCallback(husart);
  2543. #endif /* USE_HAL_USART_REGISTER_CALLBACKS */
  2544. }
  2545.  
  2546. /**
  2547.   * @brief DMA USART receive process complete callback.
  2548.   * @param  hdma DMA handle.
  2549.   * @retval None
  2550.   */
  2551. static void USART_DMAReceiveCplt(DMA_HandleTypeDef *hdma)
  2552. {
  2553.   USART_HandleTypeDef *husart = (USART_HandleTypeDef *)(hdma->Parent);
  2554.  
  2555.   /* DMA Normal mode */
  2556.   if (HAL_IS_BIT_CLR(hdma->Instance->CCR, DMA_CCR_CIRC))
  2557.   {
  2558.     husart->RxXferCount = 0U;
  2559.  
  2560.     /* Disable PE and ERR (Frame error, noise error, overrun error) interrupts */
  2561.     CLEAR_BIT(husart->Instance->CR1, USART_CR1_PEIE);
  2562.     CLEAR_BIT(husart->Instance->CR3, USART_CR3_EIE);
  2563.  
  2564.     /* Disable the DMA RX transfer for the receiver request by resetting the DMAR bit
  2565.        in USART CR3 register */
  2566.     CLEAR_BIT(husart->Instance->CR3, USART_CR3_DMAR);
  2567.     /* similarly, disable the DMA TX transfer that was started to provide the
  2568.        clock to the slave device */
  2569.     CLEAR_BIT(husart->Instance->CR3, USART_CR3_DMAT);
  2570.  
  2571.     if (husart->State == HAL_USART_STATE_BUSY_RX)
  2572.     {
  2573. #if (USE_HAL_USART_REGISTER_CALLBACKS == 1)
  2574.       /* Call registered Rx Complete Callback */
  2575.       husart->RxCpltCallback(husart);
  2576. #else
  2577.       /* Call legacy weak Rx Complete Callback */
  2578.       HAL_USART_RxCpltCallback(husart);
  2579. #endif /* USE_HAL_USART_REGISTER_CALLBACKS */
  2580.     }
  2581.     /* The USART state is HAL_USART_STATE_BUSY_TX_RX */
  2582.     else
  2583.     {
  2584. #if (USE_HAL_USART_REGISTER_CALLBACKS == 1)
  2585.       /* Call registered Tx Rx Complete Callback */
  2586.       husart->TxRxCpltCallback(husart);
  2587. #else
  2588.       /* Call legacy weak Tx Rx Complete Callback */
  2589.       HAL_USART_TxRxCpltCallback(husart);
  2590. #endif /* USE_HAL_USART_REGISTER_CALLBACKS */
  2591.     }
  2592.     husart->State = HAL_USART_STATE_READY;
  2593.   }
  2594.   /* DMA circular mode */
  2595.   else
  2596.   {
  2597.     if (husart->State == HAL_USART_STATE_BUSY_RX)
  2598.     {
  2599. #if (USE_HAL_USART_REGISTER_CALLBACKS == 1)
  2600.       /* Call registered Rx Complete Callback */
  2601.       husart->RxCpltCallback(husart);
  2602. #else
  2603.       /* Call legacy weak Rx Complete Callback */
  2604.       HAL_USART_RxCpltCallback(husart);
  2605. #endif /* USE_HAL_USART_REGISTER_CALLBACKS */
  2606.     }
  2607.     /* The USART state is HAL_USART_STATE_BUSY_TX_RX */
  2608.     else
  2609.     {
  2610. #if (USE_HAL_USART_REGISTER_CALLBACKS == 1)
  2611.       /* Call registered Tx Rx Complete Callback */
  2612.       husart->TxRxCpltCallback(husart);
  2613. #else
  2614.       /* Call legacy weak Tx Rx Complete Callback */
  2615.       HAL_USART_TxRxCpltCallback(husart);
  2616. #endif /* USE_HAL_USART_REGISTER_CALLBACKS */
  2617.     }
  2618.   }
  2619. }
  2620.  
  2621. /**
  2622.   * @brief DMA USART receive process half complete callback.
  2623.   * @param  hdma DMA handle.
  2624.   * @retval None
  2625.   */
  2626. static void USART_DMARxHalfCplt(DMA_HandleTypeDef *hdma)
  2627. {
  2628.   USART_HandleTypeDef *husart = (USART_HandleTypeDef *)(hdma->Parent);
  2629.  
  2630. #if (USE_HAL_USART_REGISTER_CALLBACKS == 1)
  2631.   /* Call registered Rx Half Complete Callback */
  2632.   husart->RxHalfCpltCallback(husart);
  2633. #else
  2634.   /* Call legacy weak Rx Half Complete Callback */
  2635.   HAL_USART_RxHalfCpltCallback(husart);
  2636. #endif /* USE_HAL_USART_REGISTER_CALLBACKS */
  2637. }
  2638.  
  2639. /**
  2640.   * @brief DMA USART communication error callback.
  2641.   * @param  hdma DMA handle.
  2642.   * @retval None
  2643.   */
  2644. static void USART_DMAError(DMA_HandleTypeDef *hdma)
  2645. {
  2646.   USART_HandleTypeDef *husart = (USART_HandleTypeDef *)(hdma->Parent);
  2647.  
  2648.   husart->RxXferCount = 0U;
  2649.   husart->TxXferCount = 0U;
  2650.   USART_EndTransfer(husart);
  2651.  
  2652.   husart->ErrorCode |= HAL_USART_ERROR_DMA;
  2653.   husart->State = HAL_USART_STATE_READY;
  2654.  
  2655. #if (USE_HAL_USART_REGISTER_CALLBACKS == 1)
  2656.   /* Call registered Error Callback */
  2657.   husart->ErrorCallback(husart);
  2658. #else
  2659.   /* Call legacy weak Error Callback */
  2660.   HAL_USART_ErrorCallback(husart);
  2661. #endif /* USE_HAL_USART_REGISTER_CALLBACKS */
  2662. }
  2663.  
  2664. /**
  2665.   * @brief  DMA USART communication abort callback, when initiated by HAL services on Error
  2666.   *         (To be called at end of DMA Abort procedure following error occurrence).
  2667.   * @param  hdma DMA handle.
  2668.   * @retval None
  2669.   */
  2670. static void USART_DMAAbortOnError(DMA_HandleTypeDef *hdma)
  2671. {
  2672.   USART_HandleTypeDef *husart = (USART_HandleTypeDef *)(hdma->Parent);
  2673.   husart->RxXferCount = 0U;
  2674.   husart->TxXferCount = 0U;
  2675.  
  2676. #if (USE_HAL_USART_REGISTER_CALLBACKS == 1)
  2677.   /* Call registered Error Callback */
  2678.   husart->ErrorCallback(husart);
  2679. #else
  2680.   /* Call legacy weak Error Callback */
  2681.   HAL_USART_ErrorCallback(husart);
  2682. #endif /* USE_HAL_USART_REGISTER_CALLBACKS */
  2683. }
  2684.  
  2685. /**
  2686.   * @brief  DMA USART Tx communication abort callback, when initiated by user
  2687.   *         (To be called at end of DMA Tx Abort procedure following user abort request).
  2688.   * @note   When this callback is executed, User Abort complete call back is called only if no
  2689.   *         Abort still ongoing for Rx DMA Handle.
  2690.   * @param  hdma DMA handle.
  2691.   * @retval None
  2692.   */
  2693. static void USART_DMATxAbortCallback(DMA_HandleTypeDef *hdma)
  2694. {
  2695.   USART_HandleTypeDef *husart = (USART_HandleTypeDef *)(hdma->Parent);
  2696.  
  2697.   husart->hdmatx->XferAbortCallback = NULL;
  2698.  
  2699.   /* Check if an Abort process is still ongoing */
  2700.   if (husart->hdmarx != NULL)
  2701.   {
  2702.     if (husart->hdmarx->XferAbortCallback != NULL)
  2703.     {
  2704.       return;
  2705.     }
  2706.   }
  2707.  
  2708.   /* No Abort process still ongoing : All DMA channels are aborted, call user Abort Complete callback */
  2709.   husart->TxXferCount = 0U;
  2710.   husart->RxXferCount = 0U;
  2711.  
  2712.   /* Reset errorCode */
  2713.   husart->ErrorCode = HAL_USART_ERROR_NONE;
  2714.  
  2715.   /* Clear the Error flags in the ICR register */
  2716.   __HAL_USART_CLEAR_FLAG(husart, USART_CLEAR_OREF | USART_CLEAR_NEF | USART_CLEAR_PEF | USART_CLEAR_FEF);
  2717.  
  2718.   /* Restore husart->State to Ready */
  2719.   husart->State = HAL_USART_STATE_READY;
  2720.  
  2721.   /* Call user Abort complete callback */
  2722. #if (USE_HAL_USART_REGISTER_CALLBACKS == 1)
  2723.   /* Call registered Abort Complete Callback */
  2724.   husart->AbortCpltCallback(husart);
  2725. #else
  2726.   /* Call legacy weak Abort Complete Callback */
  2727.   HAL_USART_AbortCpltCallback(husart);
  2728. #endif /* USE_HAL_USART_REGISTER_CALLBACKS */
  2729.  
  2730. }
  2731.  
  2732.  
  2733. /**
  2734.   * @brief  DMA USART Rx communication abort callback, when initiated by user
  2735.   *         (To be called at end of DMA Rx Abort procedure following user abort request).
  2736.   * @note   When this callback is executed, User Abort complete call back is called only if no
  2737.   *         Abort still ongoing for Tx DMA Handle.
  2738.   * @param  hdma DMA handle.
  2739.   * @retval None
  2740.   */
  2741. static void USART_DMARxAbortCallback(DMA_HandleTypeDef *hdma)
  2742. {
  2743.   USART_HandleTypeDef *husart = (USART_HandleTypeDef *)(hdma->Parent);
  2744.  
  2745.   husart->hdmarx->XferAbortCallback = NULL;
  2746.  
  2747.   /* Check if an Abort process is still ongoing */
  2748.   if (husart->hdmatx != NULL)
  2749.   {
  2750.     if (husart->hdmatx->XferAbortCallback != NULL)
  2751.     {
  2752.       return;
  2753.     }
  2754.   }
  2755.  
  2756.   /* No Abort process still ongoing : All DMA channels are aborted, call user Abort Complete callback */
  2757.   husart->TxXferCount = 0U;
  2758.   husart->RxXferCount = 0U;
  2759.  
  2760.   /* Reset errorCode */
  2761.   husart->ErrorCode = HAL_USART_ERROR_NONE;
  2762.  
  2763.   /* Clear the Error flags in the ICR register */
  2764.   __HAL_USART_CLEAR_FLAG(husart, USART_CLEAR_OREF | USART_CLEAR_NEF | USART_CLEAR_PEF | USART_CLEAR_FEF);
  2765.  
  2766.   /* Restore husart->State to Ready */
  2767.   husart->State  = HAL_USART_STATE_READY;
  2768.  
  2769.   /* Call user Abort complete callback */
  2770. #if (USE_HAL_USART_REGISTER_CALLBACKS == 1)
  2771.   /* Call registered Abort Complete Callback */
  2772.   husart->AbortCpltCallback(husart);
  2773. #else
  2774.   /* Call legacy weak Abort Complete Callback */
  2775.   HAL_USART_AbortCpltCallback(husart);
  2776. #endif /* USE_HAL_USART_REGISTER_CALLBACKS */
  2777. }
  2778.  
  2779.  
  2780. /**
  2781.   * @brief  Handle USART Communication Timeout.
  2782.   * @param  husart USART handle.
  2783.   * @param  Flag Specifies the USART flag to check.
  2784.   * @param  Status the Flag status (SET or RESET).
  2785.   * @param  Tickstart Tick start value
  2786.   * @param  Timeout timeout duration.
  2787.   * @retval HAL status
  2788.   */
  2789. static HAL_StatusTypeDef USART_WaitOnFlagUntilTimeout(USART_HandleTypeDef *husart, uint32_t Flag, FlagStatus Status,
  2790.                                                       uint32_t Tickstart, uint32_t Timeout)
  2791. {
  2792.   /* Wait until flag is set */
  2793.   while ((__HAL_USART_GET_FLAG(husart, Flag) ? SET : RESET) == Status)
  2794.   {
  2795.     /* Check for the Timeout */
  2796.     if (Timeout != HAL_MAX_DELAY)
  2797.     {
  2798.       if (((HAL_GetTick() - Tickstart) > Timeout) || (Timeout == 0U))
  2799.       {
  2800.         husart->State = HAL_USART_STATE_READY;
  2801.  
  2802.         /* Process Unlocked */
  2803.         __HAL_UNLOCK(husart);
  2804.  
  2805.         return HAL_TIMEOUT;
  2806.       }
  2807.     }
  2808.   }
  2809.   return HAL_OK;
  2810. }
  2811.  
  2812. /**
  2813.   * @brief Configure the USART peripheral.
  2814.   * @param husart USART handle.
  2815.   * @retval HAL status
  2816.   */
  2817. static HAL_StatusTypeDef USART_SetConfig(USART_HandleTypeDef *husart)
  2818. {
  2819.   uint32_t tmpreg;
  2820.   USART_ClockSourceTypeDef clocksource;
  2821.   HAL_StatusTypeDef ret                = HAL_OK;
  2822.   uint16_t brrtemp;
  2823.   uint32_t usartdiv                    = 0x00000000;
  2824.   uint32_t pclk;
  2825.  
  2826.   /* Check the parameters */
  2827.   assert_param(IS_USART_POLARITY(husart->Init.CLKPolarity));
  2828.   assert_param(IS_USART_PHASE(husart->Init.CLKPhase));
  2829.   assert_param(IS_USART_LASTBIT(husart->Init.CLKLastBit));
  2830.   assert_param(IS_USART_BAUDRATE(husart->Init.BaudRate));
  2831.   assert_param(IS_USART_WORD_LENGTH(husart->Init.WordLength));
  2832.   assert_param(IS_USART_STOPBITS(husart->Init.StopBits));
  2833.   assert_param(IS_USART_PARITY(husart->Init.Parity));
  2834.   assert_param(IS_USART_MODE(husart->Init.Mode));
  2835.  
  2836.   /*-------------------------- USART CR1 Configuration -----------------------*/
  2837.   /* Clear M, PCE, PS, TE and RE bits and configure
  2838.   *  the USART Word Length, Parity and Mode:
  2839.   *  set the M bits according to husart->Init.WordLength value
  2840.   *  set PCE and PS bits according to husart->Init.Parity value
  2841.   *  set TE and RE bits according to husart->Init.Mode value
  2842.   *  force OVER8 to 1 to allow to reach the maximum speed (Fclock/8) */
  2843.   tmpreg = (uint32_t)husart->Init.WordLength | husart->Init.Parity | husart->Init.Mode | USART_CR1_OVER8;
  2844.   MODIFY_REG(husart->Instance->CR1, USART_CR1_FIELDS, tmpreg);
  2845.  
  2846.   /*---------------------------- USART CR2 Configuration ---------------------*/
  2847.   /* Clear and configure the USART Clock, CPOL, CPHA, LBCL and STOP bits:
  2848.    * set CPOL bit according to husart->Init.CLKPolarity value
  2849.    * set CPHA bit according to husart->Init.CLKPhase value
  2850.    * set LBCL bit according to husart->Init.CLKLastBit value (used in SPI master mode only)
  2851.    * set STOP[13:12] bits according to husart->Init.StopBits value */
  2852.   tmpreg = (uint32_t)(USART_CLOCK_ENABLE);
  2853.   tmpreg |= (uint32_t)husart->Init.CLKLastBit;
  2854.   tmpreg |= ((uint32_t)husart->Init.CLKPolarity | (uint32_t)husart->Init.CLKPhase);
  2855.   tmpreg |= (uint32_t)husart->Init.StopBits;
  2856.   MODIFY_REG(husart->Instance->CR2, USART_CR2_FIELDS, tmpreg);
  2857.  
  2858.  
  2859.   /*-------------------------- USART BRR Configuration -----------------------*/
  2860.   /* BRR is filled-up according to OVER8 bit setting which is forced to 1     */
  2861.   USART_GETCLOCKSOURCE(husart, clocksource);
  2862.  
  2863.   switch (clocksource)
  2864.   {
  2865.     case USART_CLOCKSOURCE_PCLK1:
  2866.       pclk = HAL_RCC_GetPCLK1Freq();
  2867.       usartdiv = (uint32_t)(USART_DIV_SAMPLING8(pclk, husart->Init.BaudRate));
  2868.       break;
  2869.     case USART_CLOCKSOURCE_HSI:
  2870.       usartdiv = (uint32_t)(USART_DIV_SAMPLING8(HSI_VALUE, husart->Init.BaudRate));
  2871.       break;
  2872.     case USART_CLOCKSOURCE_SYSCLK:
  2873.       pclk = HAL_RCC_GetSysClockFreq();
  2874.       usartdiv = (uint32_t)(USART_DIV_SAMPLING8(pclk, husart->Init.BaudRate));
  2875.       break;
  2876.     case USART_CLOCKSOURCE_LSE:
  2877.       usartdiv = (uint32_t)(USART_DIV_SAMPLING8(LSE_VALUE, husart->Init.BaudRate));
  2878.       break;
  2879.     default:
  2880.       ret = HAL_ERROR;
  2881.       break;
  2882.   }
  2883.  
  2884.   /* USARTDIV must be greater than or equal to 0d16 and smaller than or equal to ffff */
  2885.   if ((usartdiv >= USART_BRR_MIN) && (usartdiv <= USART_BRR_MAX))
  2886.   {
  2887.     brrtemp = (uint16_t)(usartdiv & 0xFFF0U);
  2888.     brrtemp |= (uint16_t)((usartdiv & (uint16_t)0x000FU) >> 1U);
  2889.     husart->Instance->BRR = brrtemp;
  2890.   }
  2891.   else
  2892.   {
  2893.     ret = HAL_ERROR;
  2894.   }
  2895.  
  2896.  
  2897.   /* Clear ISR function pointers */
  2898.   husart->RxISR   = NULL;
  2899.   husart->TxISR   = NULL;
  2900.  
  2901.   return ret;
  2902. }
  2903.  
  2904. /**
  2905.   * @brief Check the USART Idle State.
  2906.   * @param husart USART handle.
  2907.   * @retval HAL status
  2908.   */
  2909. static HAL_StatusTypeDef USART_CheckIdleState(USART_HandleTypeDef *husart)
  2910. {
  2911.   uint32_t tickstart;
  2912.  
  2913.   /* Initialize the USART ErrorCode */
  2914.   husart->ErrorCode = HAL_USART_ERROR_NONE;
  2915.  
  2916.   /* Init tickstart for timeout managment*/
  2917.   tickstart = HAL_GetTick();
  2918.  
  2919.   /* Check if the Transmitter is enabled */
  2920.   if ((husart->Instance->CR1 & USART_CR1_TE) == USART_CR1_TE)
  2921.   {
  2922.     /* Wait until TEACK flag is set */
  2923.     if (USART_WaitOnFlagUntilTimeout(husart, USART_ISR_TEACK, RESET, tickstart, USART_TEACK_REACK_TIMEOUT) != HAL_OK)
  2924.     {
  2925.       /* Timeout occurred */
  2926.       return HAL_TIMEOUT;
  2927.     }
  2928.   }
  2929.   /* Check if the Receiver is enabled */
  2930.   if ((husart->Instance->CR1 & USART_CR1_RE) == USART_CR1_RE)
  2931.   {
  2932.     /* Wait until REACK flag is set */
  2933.     if (USART_WaitOnFlagUntilTimeout(husart, USART_ISR_REACK, RESET, tickstart, USART_TEACK_REACK_TIMEOUT) != HAL_OK)
  2934.     {
  2935.       /* Timeout occurred */
  2936.       return HAL_TIMEOUT;
  2937.     }
  2938.   }
  2939.  
  2940.   /* Initialize the USART state*/
  2941.   husart->State = HAL_USART_STATE_READY;
  2942.  
  2943.   /* Process Unlocked */
  2944.   __HAL_UNLOCK(husart);
  2945.  
  2946.   return HAL_OK;
  2947. }
  2948.  
  2949. /**
  2950.   * @brief  Simplex send an amount of data in non-blocking mode.
  2951.   * @note   Function called under interruption only, once
  2952.   *         interruptions have been enabled by HAL_USART_Transmit_IT().
  2953.   * @note   The USART errors are not managed to avoid the overrun error.
  2954.   * @note   ISR function executed when data word length is less than 9 bits long.
  2955.   * @param  husart USART handle.
  2956.   * @retval None
  2957.   */
  2958. static void USART_TxISR_8BIT(USART_HandleTypeDef *husart)
  2959. {
  2960.   const HAL_USART_StateTypeDef state = husart->State;
  2961.  
  2962.   /* Check that a Tx process is ongoing */
  2963.   if ((state == HAL_USART_STATE_BUSY_TX) ||
  2964.       (state == HAL_USART_STATE_BUSY_TX_RX))
  2965.   {
  2966.     if (husart->TxXferCount == 0U)
  2967.     {
  2968.       /* Disable the USART Transmit data register empty interrupt */
  2969.       __HAL_USART_DISABLE_IT(husart, USART_IT_TXE);
  2970.  
  2971.       /* Enable the USART Transmit Complete Interrupt */
  2972.       __HAL_USART_ENABLE_IT(husart, USART_IT_TC);
  2973.     }
  2974.     else
  2975.     {
  2976.       husart->Instance->TDR = (uint8_t)(*husart->pTxBuffPtr & (uint8_t)0xFF);
  2977.       husart->pTxBuffPtr++;
  2978.       husart->TxXferCount--;
  2979.     }
  2980.   }
  2981. }
  2982.  
  2983. /**
  2984.   * @brief  Simplex send an amount of data in non-blocking mode.
  2985.   * @note   Function called under interruption only, once
  2986.   *         interruptions have been enabled by HAL_USART_Transmit_IT().
  2987.   * @note   The USART errors are not managed to avoid the overrun error.
  2988.   * @note   ISR function executed when data word length is 9 bits long.
  2989.   * @param  husart USART handle.
  2990.   * @retval None
  2991.   */
  2992. static void USART_TxISR_16BIT(USART_HandleTypeDef *husart)
  2993. {
  2994.   const HAL_USART_StateTypeDef state = husart->State;
  2995.   uint16_t *tmp;
  2996.  
  2997.   if ((state == HAL_USART_STATE_BUSY_TX) ||
  2998.       (state == HAL_USART_STATE_BUSY_TX_RX))
  2999.   {
  3000.     if (husart->TxXferCount == 0U)
  3001.     {
  3002.       /* Disable the USART Transmit data register empty interrupt */
  3003.       __HAL_USART_DISABLE_IT(husart, USART_IT_TXE);
  3004.  
  3005.       /* Enable the USART Transmit Complete Interrupt */
  3006.       __HAL_USART_ENABLE_IT(husart, USART_IT_TC);
  3007.     }
  3008.     else
  3009.     {
  3010.       tmp = (uint16_t *) husart->pTxBuffPtr;
  3011.       husart->Instance->TDR = (uint16_t)(*tmp & 0x01FFU);
  3012.       husart->pTxBuffPtr += 2U;
  3013.       husart->TxXferCount--;
  3014.     }
  3015.   }
  3016. }
  3017.  
  3018.  
  3019. /**
  3020.   * @brief  Wraps up transmission in non-blocking mode.
  3021.   * @param  husart Pointer to a USART_HandleTypeDef structure that contains
  3022.   *                the configuration information for the specified USART module.
  3023.   * @retval None
  3024.   */
  3025. static void USART_EndTransmit_IT(USART_HandleTypeDef *husart)
  3026. {
  3027.   /* Disable the USART Transmit Complete Interrupt */
  3028.   __HAL_USART_DISABLE_IT(husart, USART_IT_TC);
  3029.  
  3030.   /* Disable the USART Error Interrupt: (Frame error, noise error, overrun error) */
  3031.   __HAL_USART_DISABLE_IT(husart, USART_IT_ERR);
  3032.  
  3033.   /* Clear TxISR function pointer */
  3034.   husart->TxISR = NULL;
  3035.  
  3036.   if (husart->State == HAL_USART_STATE_BUSY_TX)
  3037.   {
  3038.     /* Clear overrun flag and discard the received data */
  3039.     __HAL_USART_CLEAR_OREFLAG(husart);
  3040.     __HAL_USART_SEND_REQ(husart, USART_RXDATA_FLUSH_REQUEST);
  3041.  
  3042.     /* Tx process is completed, restore husart->State to Ready */
  3043.     husart->State = HAL_USART_STATE_READY;
  3044.  
  3045. #if (USE_HAL_USART_REGISTER_CALLBACKS == 1)
  3046.     /* Call registered Tx Complete Callback */
  3047.     husart->TxCpltCallback(husart);
  3048. #else
  3049.     /* Call legacy weak Tx Complete Callback */
  3050.     HAL_USART_TxCpltCallback(husart);
  3051. #endif /* USE_HAL_USART_REGISTER_CALLBACKS */
  3052.   }
  3053.   else if (husart->RxXferCount == 0U)
  3054.   {
  3055.     /* TxRx process is completed, restore husart->State to Ready */
  3056.     husart->State = HAL_USART_STATE_READY;
  3057.  
  3058. #if (USE_HAL_USART_REGISTER_CALLBACKS == 1)
  3059.     /* Call registered Tx Rx Complete Callback */
  3060.     husart->TxRxCpltCallback(husart);
  3061. #else
  3062.     /* Call legacy weak Tx Rx Complete Callback */
  3063.     HAL_USART_TxRxCpltCallback(husart);
  3064. #endif /* USE_HAL_USART_REGISTER_CALLBACKS */
  3065.   }
  3066.   else
  3067.   {
  3068.     /* Nothing to do */
  3069.   }
  3070. }
  3071.  
  3072.  
  3073. /**
  3074.   * @brief  Simplex receive an amount of data in non-blocking mode.
  3075.   * @note   Function called under interruption only, once
  3076.   *         interruptions have been enabled by HAL_USART_Receive_IT().
  3077.   * @note   ISR function executed when data word length is less than 9 bits long.
  3078.   * @param  husart USART handle
  3079.   * @retval None
  3080.   */
  3081. static void USART_RxISR_8BIT(USART_HandleTypeDef *husart)
  3082. {
  3083.   const HAL_USART_StateTypeDef state = husart->State;
  3084.   uint16_t txdatacount;
  3085.   uint16_t uhMask = husart->Mask;
  3086.  
  3087.   if ((state == HAL_USART_STATE_BUSY_RX) ||
  3088.       (state == HAL_USART_STATE_BUSY_TX_RX))
  3089.   {
  3090.     *husart->pRxBuffPtr = (uint8_t)(husart->Instance->RDR & (uint8_t)uhMask);
  3091.     husart->pRxBuffPtr++;
  3092.     husart->RxXferCount--;
  3093.  
  3094.     if (husart->RxXferCount == 0U)
  3095.     {
  3096.       /* Disable the USART Parity Error Interrupt and RXNE interrupt*/
  3097.       CLEAR_BIT(husart->Instance->CR1, (USART_CR1_RXNEIE | USART_CR1_PEIE));
  3098.  
  3099.       /* Disable the USART Error Interrupt: (Frame error, noise error, overrun error) */
  3100.       CLEAR_BIT(husart->Instance->CR3, USART_CR3_EIE);
  3101.  
  3102.       /* Clear RxISR function pointer */
  3103.       husart->RxISR = NULL;
  3104.  
  3105.       /* txdatacount is a temporary variable for MISRAC2012-Rule-13.5 */
  3106.       txdatacount = husart->TxXferCount;
  3107.  
  3108.       if (state == HAL_USART_STATE_BUSY_RX)
  3109.       {
  3110.  
  3111.         /* Rx process is completed, restore husart->State to Ready */
  3112.         husart->State = HAL_USART_STATE_READY;
  3113.  
  3114. #if (USE_HAL_USART_REGISTER_CALLBACKS == 1)
  3115.         /* Call registered Rx Complete Callback */
  3116.         husart->RxCpltCallback(husart);
  3117. #else
  3118.         /* Call legacy weak Rx Complete Callback */
  3119.         HAL_USART_RxCpltCallback(husart);
  3120. #endif /* USE_HAL_USART_REGISTER_CALLBACKS */
  3121.       }
  3122.       else if ((READ_BIT(husart->Instance->CR1, USART_CR1_TCIE) != USART_CR1_TCIE) &&
  3123.                (txdatacount == 0U))
  3124.       {
  3125.         /* TxRx process is completed, restore husart->State to Ready */
  3126.         husart->State = HAL_USART_STATE_READY;
  3127.  
  3128. #if (USE_HAL_USART_REGISTER_CALLBACKS == 1)
  3129.         /* Call registered Tx Rx Complete Callback */
  3130.         husart->TxRxCpltCallback(husart);
  3131. #else
  3132.         /* Call legacy weak Tx Rx Complete Callback */
  3133.         HAL_USART_TxRxCpltCallback(husart);
  3134. #endif /* USE_HAL_USART_REGISTER_CALLBACKS */
  3135.       }
  3136.       else
  3137.       {
  3138.         /* Nothing to do */
  3139.       }
  3140.     }
  3141.     else if (state == HAL_USART_STATE_BUSY_RX)
  3142.     {
  3143.       /* Send dummy byte in order to generate the clock for the Slave to Send the next data */
  3144.       husart->Instance->TDR = (USART_DUMMY_DATA & (uint16_t)0x00FF);
  3145.     }
  3146.     else
  3147.     {
  3148.       /* Nothing to do */
  3149.     }
  3150.   }
  3151. }
  3152.  
  3153. /**
  3154.   * @brief  Simplex receive an amount of data in non-blocking mode.
  3155.   * @note   Function called under interruption only, once
  3156.   *         interruptions have been enabled by HAL_USART_Receive_IT().
  3157.   * @note   ISR function executed when data word length is 9 bits long.
  3158.   * @param  husart USART handle
  3159.   * @retval None
  3160.   */
  3161. static void USART_RxISR_16BIT(USART_HandleTypeDef *husart)
  3162. {
  3163.   const HAL_USART_StateTypeDef state = husart->State;
  3164.   uint16_t txdatacount;
  3165.   uint16_t *tmp;
  3166.   uint16_t uhMask = husart->Mask;
  3167.  
  3168.   if ((state == HAL_USART_STATE_BUSY_RX) ||
  3169.       (state == HAL_USART_STATE_BUSY_TX_RX))
  3170.   {
  3171.     tmp = (uint16_t *) husart->pRxBuffPtr;
  3172.     *tmp = (uint16_t)(husart->Instance->RDR & uhMask);
  3173.     husart->pRxBuffPtr += 2U;
  3174.     husart->RxXferCount--;
  3175.  
  3176.     if (husart->RxXferCount == 0U)
  3177.     {
  3178.       /* Disable the USART Parity Error Interrupt and RXNE interrupt*/
  3179.       CLEAR_BIT(husart->Instance->CR1, (USART_CR1_RXNEIE | USART_CR1_PEIE));
  3180.  
  3181.       /* Disable the USART Error Interrupt: (Frame error, noise error, overrun error) */
  3182.       CLEAR_BIT(husart->Instance->CR3, USART_CR3_EIE);
  3183.  
  3184.       /* Clear RxISR function pointer */
  3185.       husart->RxISR = NULL;
  3186.  
  3187.       /* txdatacount is a temporary variable for MISRAC2012-Rule-13.5 */
  3188.       txdatacount = husart->TxXferCount;
  3189.  
  3190.       if (state == HAL_USART_STATE_BUSY_RX)
  3191.       {
  3192.  
  3193.         /* Rx process is completed, restore husart->State to Ready */
  3194.         husart->State = HAL_USART_STATE_READY;
  3195.  
  3196. #if (USE_HAL_USART_REGISTER_CALLBACKS == 1)
  3197.         /* Call registered Rx Complete Callback */
  3198.         husart->RxCpltCallback(husart);
  3199. #else
  3200.         /* Call legacy weak Rx Complete Callback */
  3201.         HAL_USART_RxCpltCallback(husart);
  3202. #endif /* USE_HAL_USART_REGISTER_CALLBACKS */
  3203.       }
  3204.       else if ((READ_BIT(husart->Instance->CR1, USART_CR1_TCIE) != USART_CR1_TCIE) &&
  3205.                (txdatacount == 0U))
  3206.       {
  3207.         /* TxRx process is completed, restore husart->State to Ready */
  3208.         husart->State = HAL_USART_STATE_READY;
  3209.  
  3210. #if (USE_HAL_USART_REGISTER_CALLBACKS == 1)
  3211.         /* Call registered Tx Rx Complete Callback */
  3212.         husart->TxRxCpltCallback(husart);
  3213. #else
  3214.         /* Call legacy weak Tx Rx Complete Callback */
  3215.         HAL_USART_TxRxCpltCallback(husart);
  3216. #endif /* USE_HAL_USART_REGISTER_CALLBACKS */
  3217.       }
  3218.       else
  3219.       {
  3220.         /* Nothing to do */
  3221.       }
  3222.     }
  3223.     else if (state == HAL_USART_STATE_BUSY_RX)
  3224.     {
  3225.       /* Send dummy byte in order to generate the clock for the Slave to Send the next data */
  3226.       husart->Instance->TDR = (USART_DUMMY_DATA & (uint16_t)0x00FF);
  3227.     }
  3228.     else
  3229.     {
  3230.       /* Nothing to do */
  3231.     }
  3232.   }
  3233. }
  3234.  
  3235.  
  3236. /**
  3237.   * @}
  3238.   */
  3239.  
  3240. #endif /* HAL_USART_MODULE_ENABLED */
  3241. /**
  3242.   * @}
  3243.   */
  3244.  
  3245. /**
  3246.   * @}
  3247.   */
  3248.  
  3249. /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
  3250.