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  1. /**
  2.   ******************************************************************************
  3.   * @file    stm32f1xx_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.   @verbatim
  13.   ==============================================================================
  14.                         ##### How to use this driver #####
  15.   ==============================================================================
  16.   [..]
  17.     The USART HAL driver can be used as follows:
  18.  
  19.     (#) Declare a USART_HandleTypeDef handle structure (eg. USART_HandleTypeDef husart).
  20.     (#) Initialize the USART low level resources by implementing the HAL_USART_MspInit() API:
  21.         (##) Enable the USARTx interface clock.
  22.         (##) USART pins configuration:
  23.              (+++) Enable the clock for the USART GPIOs.
  24.              (+++) Configure the USART pins as alternate function pull-up.
  25.         (##) NVIC configuration if you need to use interrupt process (HAL_USART_Transmit_IT(),
  26.              HAL_USART_Receive_IT() and HAL_USART_TransmitReceive_IT() APIs):
  27.              (+++) Configure the USARTx interrupt priority.
  28.              (+++) Enable the NVIC USART IRQ handle.
  29.         (##) DMA Configuration if you need to use DMA process (HAL_USART_Transmit_DMA()
  30.              HAL_USART_Receive_DMA() and HAL_USART_TransmitReceive_DMA() APIs):
  31.              (+++) Declare a DMA handle structure for the Tx/Rx channel.
  32.              (+++) Enable the DMAx interface clock.
  33.              (+++) Configure the declared DMA handle structure with the required Tx/Rx parameters.
  34.              (+++) Configure the DMA Tx/Rx channel.
  35.              (+++) Associate the initialized DMA handle to the USART DMA Tx/Rx handle.
  36.              (+++) Configure the priority and enable the NVIC for the transfer complete interrupt on the DMA Tx/Rx channel.
  37.              (+++) Configure the USARTx interrupt priority and enable the NVIC USART IRQ handle
  38.                    (used for last byte sending completion detection in DMA non circular mode)
  39.  
  40.     (#) Program the Baud Rate, Word Length, Stop Bit, Parity, Hardware
  41.         flow control and Mode(Receiver/Transmitter) in the husart Init structure.
  42.  
  43.     (#) Initialize the USART registers by calling the HAL_USART_Init() API:
  44.         (++) These APIs configures also the low level Hardware GPIO, CLOCK, CORTEX...etc)
  45.              by calling the customized HAL_USART_MspInit(&husart) API.
  46.  
  47.         -@@- The specific USART interrupts (Transmission complete interrupt,
  48.              RXNE interrupt and Error Interrupts) will be managed using the macros
  49.              __HAL_USART_ENABLE_IT() and __HAL_USART_DISABLE_IT() inside the transmit and receive process.
  50.  
  51.     (#) Three operation modes are available within this driver :
  52.  
  53.      *** Polling mode IO operation ***
  54.      =================================
  55.      [..]
  56.        (+) Send an amount of data in blocking mode using HAL_USART_Transmit()
  57.        (+) Receive an amount of data in blocking mode using HAL_USART_Receive()
  58.  
  59.      *** Interrupt mode IO operation ***
  60.      ===================================
  61.      [..]
  62.        (+) Send an amount of data in non blocking mode using HAL_USART_Transmit_IT()
  63.        (+) At transmission end of transfer HAL_USART_TxHalfCpltCallback is executed and user can
  64.             add his own code by customization of function pointer HAL_USART_TxCpltCallback
  65.        (+) Receive an amount of data in non blocking mode using HAL_USART_Receive_IT()
  66.        (+) At reception end of transfer HAL_USART_RxCpltCallback is executed and user can
  67.             add his own code by customization of function pointer HAL_USART_RxCpltCallback
  68.        (+) In case of transfer Error, HAL_USART_ErrorCallback() function is executed and user can
  69.             add his own code by customization of function pointer HAL_USART_ErrorCallback
  70.  
  71.      *** DMA mode IO operation ***
  72.      ==============================
  73.      [..]
  74.        (+) Send an amount of data in non blocking mode (DMA) using HAL_USART_Transmit_DMA()
  75.        (+) At transmission end of half transfer HAL_USART_TxHalfCpltCallback is executed and user can
  76.             add his own code by customization of function pointer HAL_USART_TxHalfCpltCallback
  77.        (+) At transmission end of transfer HAL_USART_TxCpltCallback is executed and user can
  78.             add his own code by customization of function pointer HAL_USART_TxCpltCallback
  79.        (+) Receive an amount of data in non blocking mode (DMA) using HAL_USART_Receive_DMA()
  80.        (+) At reception end of half transfer HAL_USART_RxHalfCpltCallback is executed and user can
  81.             add his own code by customization of function pointer HAL_USART_RxHalfCpltCallback
  82.        (+) At reception end of transfer HAL_USART_RxCpltCallback is executed and user can
  83.             add his own code by customization of function pointer HAL_USART_RxCpltCallback
  84.        (+) In case of transfer Error, HAL_USART_ErrorCallback() function is executed and user can
  85.             add his own code by customization of function pointer HAL_USART_ErrorCallback
  86.        (+) Pause the DMA Transfer using HAL_USART_DMAPause()
  87.        (+) Resume the DMA Transfer using HAL_USART_DMAResume()
  88.        (+) Stop the DMA Transfer using HAL_USART_DMAStop()
  89.  
  90.      *** USART HAL driver macros list ***
  91.      =============================================
  92.      [..]
  93.        Below the list of most used macros in USART HAL driver.
  94.  
  95.        (+) __HAL_USART_ENABLE: Enable the USART peripheral
  96.        (+) __HAL_USART_DISABLE: Disable the USART peripheral
  97.        (+) __HAL_USART_GET_FLAG : Check whether the specified USART flag is set or not
  98.        (+) __HAL_USART_CLEAR_FLAG : Clear the specified USART pending flag
  99.        (+) __HAL_USART_ENABLE_IT: Enable the specified USART interrupt
  100.        (+) __HAL_USART_DISABLE_IT: Disable the specified USART interrupt
  101.  
  102.      [..]
  103.        (@) You can refer to the USART HAL driver header file for more useful macros
  104.  
  105.     ##### Callback registration #####
  106.     ==================================
  107.  
  108.     [..]
  109.     The compilation define USE_HAL_USART_REGISTER_CALLBACKS when set to 1
  110.     allows the user to configure dynamically the driver callbacks.
  111.  
  112.     [..]
  113.     Use Function @ref HAL_USART_RegisterCallback() to register a user callback.
  114.     Function @ref HAL_USART_RegisterCallback() allows to register following callbacks:
  115.     (+) TxHalfCpltCallback        : Tx Half Complete Callback.
  116.     (+) TxCpltCallback            : Tx Complete Callback.
  117.     (+) RxHalfCpltCallback        : Rx Half Complete Callback.
  118.     (+) RxCpltCallback            : Rx Complete Callback.
  119.     (+) TxRxCpltCallback          : Tx Rx Complete Callback.
  120.     (+) ErrorCallback             : Error Callback.
  121.     (+) AbortCpltCallback         : Abort Complete Callback.
  122.     (+) MspInitCallback           : USART MspInit.
  123.     (+) MspDeInitCallback         : USART MspDeInit.
  124.     This function takes as parameters the HAL peripheral handle, the Callback ID
  125.     and a pointer to the user callback function.
  126.  
  127.     [..]
  128.     Use function @ref HAL_USART_UnRegisterCallback() to reset a callback to the default
  129.     weak (surcharged) function.
  130.     @ref HAL_USART_UnRegisterCallback() takes as parameters the HAL peripheral handle,
  131.     and the Callback ID.
  132.     This function allows to reset following callbacks:
  133.     (+) TxHalfCpltCallback        : Tx Half Complete Callback.
  134.     (+) TxCpltCallback            : Tx Complete Callback.
  135.     (+) RxHalfCpltCallback        : Rx Half Complete Callback.
  136.     (+) RxCpltCallback            : Rx Complete Callback.
  137.     (+) TxRxCpltCallback          : Tx Rx Complete Callback.
  138.     (+) ErrorCallback             : Error Callback.
  139.     (+) AbortCpltCallback         : Abort Complete Callback.
  140.     (+) MspInitCallback           : USART MspInit.
  141.     (+) MspDeInitCallback         : USART MspDeInit.
  142.  
  143.     [..]
  144.     By default, after the @ref HAL_USART_Init() and when the state is HAL_USART_STATE_RESET
  145.     all callbacks are set to the corresponding weak (surcharged) functions:
  146.     examples @ref HAL_USART_TxCpltCallback(), @ref HAL_USART_RxHalfCpltCallback().
  147.     Exception done for MspInit and MspDeInit functions that are respectively
  148.     reset to the legacy weak (surcharged) functions in the @ref HAL_USART_Init()
  149.     and @ref HAL_USART_DeInit() only when these callbacks are null (not registered beforehand).
  150.     If not, MspInit or MspDeInit are not null, the @ref HAL_USART_Init() and @ref HAL_USART_DeInit()
  151.     keep and use the user MspInit/MspDeInit callbacks (registered beforehand).
  152.  
  153.     [..]
  154.     Callbacks can be registered/unregistered in HAL_USART_STATE_READY state only.
  155.     Exception done MspInit/MspDeInit that can be registered/unregistered
  156.     in HAL_USART_STATE_READY or HAL_USART_STATE_RESET state, thus registered (user)
  157.     MspInit/DeInit callbacks can be used during the Init/DeInit.
  158.     In that case first register the MspInit/MspDeInit user callbacks
  159.     using @ref HAL_USART_RegisterCallback() before calling @ref HAL_USART_DeInit()
  160.     or @ref HAL_USART_Init() function.
  161.  
  162.     [..]
  163.     When The compilation define USE_HAL_USART_REGISTER_CALLBACKS is set to 0 or
  164.     not defined, the callback registration feature is not available
  165.     and weak (surcharged) callbacks are used.
  166.  
  167.   @endverbatim
  168.      [..]
  169.        (@) Additionnal remark: If the parity is enabled, then the MSB bit of the data written
  170.            in the data register is transmitted but is changed by the parity bit.
  171.            Depending on the frame length defined by the M bit (8-bits or 9-bits),
  172.            the possible USART frame formats are as listed in the following table:
  173.     +-------------------------------------------------------------+
  174.     |   M bit |  PCE bit  |            USART frame                 |
  175.     |---------------------|---------------------------------------|
  176.     |    0    |    0      |    | SB | 8 bit data | STB |          |
  177.     |---------|-----------|---------------------------------------|
  178.     |    0    |    1      |    | SB | 7 bit data | PB | STB |     |
  179.     |---------|-----------|---------------------------------------|
  180.     |    1    |    0      |    | SB | 9 bit data | STB |          |
  181.     |---------|-----------|---------------------------------------|
  182.     |    1    |    1      |    | SB | 8 bit data | PB | STB |     |
  183.     +-------------------------------------------------------------+
  184.   ******************************************************************************
  185.   * @attention
  186.   *
  187.   * <h2><center>&copy; Copyright (c) 2016 STMicroelectronics.
  188.   * All rights reserved.</center></h2>
  189.   *
  190.   * This software component is licensed by ST under BSD 3-Clause license,
  191.   * the "License"; You may not use this file except in compliance with the
  192.   * License. You may obtain a copy of the License at:
  193.   *                        opensource.org/licenses/BSD-3-Clause
  194.   *
  195.   ******************************************************************************
  196.   */
  197.  
  198. /* Includes ------------------------------------------------------------------*/
  199. #include "stm32f1xx_hal.h"
  200.  
  201. /** @addtogroup STM32F1xx_HAL_Driver
  202.   * @{
  203.   */
  204.  
  205. /** @defgroup USART USART
  206.   * @brief HAL USART Synchronous module driver
  207.   * @{
  208.   */
  209. #ifdef HAL_USART_MODULE_ENABLED
  210. /* Private typedef -----------------------------------------------------------*/
  211. /* Private define ------------------------------------------------------------*/
  212. /** @addtogroup USART_Private_Constants
  213.   * @{
  214.   */
  215. #define DUMMY_DATA           0xFFFFU
  216. #define USART_TIMEOUT_VALUE  22000U
  217. /**
  218.   * @}
  219.   */
  220. /* Private macro -------------------------------------------------------------*/
  221. /* Private variables ---------------------------------------------------------*/
  222. /* Private function prototypes -----------------------------------------------*/
  223. /* Private functions ---------------------------------------------------------*/
  224. /** @addtogroup USART_Private_Functions
  225.   * @{
  226.   */
  227. #if (USE_HAL_USART_REGISTER_CALLBACKS == 1)
  228. void USART_InitCallbacksToDefault(USART_HandleTypeDef *husart);
  229. #endif /* USE_HAL_USART_REGISTER_CALLBACKS */
  230. static void USART_EndTxTransfer(USART_HandleTypeDef *husart);
  231. static void USART_EndRxTransfer(USART_HandleTypeDef *husart);
  232. static HAL_StatusTypeDef USART_Transmit_IT(USART_HandleTypeDef *husart);
  233. static HAL_StatusTypeDef USART_EndTransmit_IT(USART_HandleTypeDef *husart);
  234. static HAL_StatusTypeDef USART_Receive_IT(USART_HandleTypeDef *husart);
  235. static HAL_StatusTypeDef USART_TransmitReceive_IT(USART_HandleTypeDef *husart);
  236. static void USART_SetConfig(USART_HandleTypeDef *husart);
  237. static void USART_DMATransmitCplt(DMA_HandleTypeDef *hdma);
  238. static void USART_DMATxHalfCplt(DMA_HandleTypeDef *hdma);
  239. static void USART_DMAReceiveCplt(DMA_HandleTypeDef *hdma);
  240. static void USART_DMARxHalfCplt(DMA_HandleTypeDef *hdma);
  241. static void USART_DMAError(DMA_HandleTypeDef *hdma);
  242. static void USART_DMAAbortOnError(DMA_HandleTypeDef *hdma);
  243. static void USART_DMATxAbortCallback(DMA_HandleTypeDef *hdma);
  244. static void USART_DMARxAbortCallback(DMA_HandleTypeDef *hdma);
  245.  
  246. static HAL_StatusTypeDef USART_WaitOnFlagUntilTimeout(USART_HandleTypeDef *husart, uint32_t Flag, FlagStatus Status, uint32_t Tickstart, uint32_t Timeout);
  247. /**
  248.   * @}
  249.   */
  250.  
  251. /* Exported functions --------------------------------------------------------*/
  252. /** @defgroup USART_Exported_Functions USART Exported Functions
  253.   * @{
  254.   */
  255.  
  256. /** @defgroup USART_Exported_Functions_Group1 USART Initialization and de-initialization functions
  257.   *  @brief    Initialization and Configuration functions
  258.   *
  259. @verbatim
  260.   ==============================================================================
  261.               ##### Initialization and Configuration functions #####
  262.   ==============================================================================
  263.   [..]
  264.   This subsection provides a set of functions allowing to initialize the USART
  265.   in asynchronous and in synchronous modes.
  266.   (+) For the asynchronous mode only these parameters can be configured:
  267.       (++) Baud Rate
  268.       (++) Word Length
  269.       (++) Stop Bit
  270.       (++) Parity: If the parity is enabled, then the MSB bit of the data written
  271.            in the data register is transmitted but is changed by the parity bit.
  272.            Depending on the frame length defined by the M bit (8-bits or 9-bits),
  273.            please refer to Reference manual for possible USART frame formats.
  274.       (++) USART polarity
  275.       (++) USART phase
  276.       (++) USART LastBit
  277.       (++) Receiver/transmitter modes
  278.  
  279.   [..]
  280.     The HAL_USART_Init() function follows the USART  synchronous configuration
  281.     procedures (details for the procedures are available in reference manuals
  282.     (RM0008 for STM32F10Xxx MCUs and RM0041 for STM32F100xx MCUs)).
  283.  
  284. @endverbatim
  285.   * @{
  286.   */
  287.  
  288. /**
  289.   * @brief  Initialize the USART mode according to the specified
  290.   *         parameters in the USART_InitTypeDef and initialize the associated handle.
  291.   * @param  husart Pointer to a USART_HandleTypeDef structure that contains
  292.   *                the configuration information for the specified USART module.
  293.   * @retval HAL status
  294.   */
  295. HAL_StatusTypeDef HAL_USART_Init(USART_HandleTypeDef *husart)
  296. {
  297.   /* Check the USART handle allocation */
  298.   if (husart == NULL)
  299.   {
  300.     return HAL_ERROR;
  301.   }
  302.  
  303.   /* Check the parameters */
  304.   assert_param(IS_USART_INSTANCE(husart->Instance));
  305.  
  306.   if (husart->State == HAL_USART_STATE_RESET)
  307.   {
  308.     /* Allocate lock resource and initialize it */
  309.     husart->Lock = HAL_UNLOCKED;
  310.  
  311. #if (USE_HAL_USART_REGISTER_CALLBACKS == 1)
  312.     USART_InitCallbacksToDefault(husart);
  313.  
  314.     if (husart->MspInitCallback == NULL)
  315.     {
  316.       husart->MspInitCallback = HAL_USART_MspInit;
  317.     }
  318.  
  319.     /* Init the low level hardware */
  320.     husart->MspInitCallback(husart);
  321. #else
  322.     /* Init the low level hardware : GPIO, CLOCK */
  323.     HAL_USART_MspInit(husart);
  324. #endif /* USE_HAL_USART_REGISTER_CALLBACKS */
  325.   }
  326.  
  327.   husart->State = HAL_USART_STATE_BUSY;
  328.  
  329.   /* Set the USART Communication parameters */
  330.   USART_SetConfig(husart);
  331.  
  332.   /* In USART mode, the following bits must be kept cleared:
  333.      - LINEN bit in the USART_CR2 register
  334.      - HDSEL, SCEN and IREN bits in the USART_CR3 register */
  335.   CLEAR_BIT(husart->Instance->CR2, USART_CR2_LINEN);
  336.   CLEAR_BIT(husart->Instance->CR3, (USART_CR3_SCEN | USART_CR3_HDSEL | USART_CR3_IREN));
  337.  
  338.   /* Enable the Peripheral */
  339.   __HAL_USART_ENABLE(husart);
  340.  
  341.   /* Initialize the USART state */
  342.   husart->ErrorCode = HAL_USART_ERROR_NONE;
  343.   husart->State = HAL_USART_STATE_READY;
  344.  
  345.   return HAL_OK;
  346. }
  347.  
  348. /**
  349.   * @brief  DeInitializes the USART peripheral.
  350.   * @param  husart Pointer to a USART_HandleTypeDef structure that contains
  351.   *                the configuration information for the specified USART module.
  352.   * @retval HAL status
  353.   */
  354. HAL_StatusTypeDef HAL_USART_DeInit(USART_HandleTypeDef *husart)
  355. {
  356.   /* Check the USART handle allocation */
  357.   if (husart == NULL)
  358.   {
  359.     return HAL_ERROR;
  360.   }
  361.  
  362.   /* Check the parameters */
  363.   assert_param(IS_USART_INSTANCE(husart->Instance));
  364.  
  365.   husart->State = HAL_USART_STATE_BUSY;
  366.  
  367.   /* Disable the Peripheral */
  368.   __HAL_USART_DISABLE(husart);
  369.  
  370. #if (USE_HAL_USART_REGISTER_CALLBACKS == 1)
  371.   if (husart->MspDeInitCallback == NULL)
  372.   {
  373.     husart->MspDeInitCallback = HAL_USART_MspDeInit;
  374.   }
  375.   /* DeInit the low level hardware */
  376.   husart->MspDeInitCallback(husart);
  377. #else
  378.   /* DeInit the low level hardware */
  379.   HAL_USART_MspDeInit(husart);
  380. #endif /* USE_HAL_USART_REGISTER_CALLBACKS */
  381.  
  382.   husart->ErrorCode = HAL_USART_ERROR_NONE;
  383.   husart->State = HAL_USART_STATE_RESET;
  384.  
  385.   /* Release Lock */
  386.   __HAL_UNLOCK(husart);
  387.  
  388.   return HAL_OK;
  389. }
  390.  
  391. /**
  392.   * @brief  USART MSP Init.
  393.   * @param  husart Pointer to a USART_HandleTypeDef structure that contains
  394.   *                the configuration information for the specified USART module.
  395.   * @retval None
  396.   */
  397. __weak void HAL_USART_MspInit(USART_HandleTypeDef *husart)
  398. {
  399.   /* Prevent unused argument(s) compilation warning */
  400.   UNUSED(husart);
  401.   /* NOTE: This function should not be modified, when the callback is needed,
  402.            the HAL_USART_MspInit could be implemented in the user file
  403.    */
  404. }
  405.  
  406. /**
  407.   * @brief  USART MSP DeInit.
  408.   * @param  husart Pointer to a USART_HandleTypeDef structure that contains
  409.   *                the configuration information for the specified USART module.
  410.   * @retval None
  411.   */
  412. __weak void HAL_USART_MspDeInit(USART_HandleTypeDef *husart)
  413. {
  414.   /* Prevent unused argument(s) compilation warning */
  415.   UNUSED(husart);
  416.   /* NOTE: This function should not be modified, when the callback is needed,
  417.            the HAL_USART_MspDeInit could be implemented in the user file
  418.    */
  419. }
  420.  
  421. #if (USE_HAL_USART_REGISTER_CALLBACKS == 1)
  422. /**
  423.   * @brief  Register a User USART Callback
  424.   *         To be used instead of the weak predefined callback
  425.   * @param  husart usart handle
  426.   * @param  CallbackID ID of the callback to be registered
  427.   *         This parameter can be one of the following values:
  428.   *           @arg @ref HAL_USART_TX_HALFCOMPLETE_CB_ID Tx Half Complete Callback ID
  429.   *           @arg @ref HAL_USART_TX_COMPLETE_CB_ID Tx Complete Callback ID
  430.   *           @arg @ref HAL_USART_RX_HALFCOMPLETE_CB_ID Rx Half Complete Callback ID
  431.   *           @arg @ref HAL_USART_RX_COMPLETE_CB_ID Rx Complete Callback ID
  432.   *           @arg @ref HAL_USART_TX_RX_COMPLETE_CB_ID Rx Complete Callback ID
  433.   *           @arg @ref HAL_USART_ERROR_CB_ID Error Callback ID
  434.   *           @arg @ref HAL_USART_ABORT_COMPLETE_CB_ID Abort Complete Callback ID
  435.   *           @arg @ref HAL_USART_MSPINIT_CB_ID MspInit Callback ID
  436.   *           @arg @ref HAL_USART_MSPDEINIT_CB_ID MspDeInit Callback ID
  437.   * @param  pCallback pointer to the Callback function
  438.   * @retval HAL status
  439. +  */
  440. HAL_StatusTypeDef HAL_USART_RegisterCallback(USART_HandleTypeDef *husart, HAL_USART_CallbackIDTypeDef CallbackID, pUSART_CallbackTypeDef pCallback)
  441. {
  442.   HAL_StatusTypeDef status = HAL_OK;
  443.  
  444.   if (pCallback == NULL)
  445.   {
  446.     /* Update the error code */
  447.     husart->ErrorCode |= HAL_USART_ERROR_INVALID_CALLBACK;
  448.  
  449.     return HAL_ERROR;
  450.   }
  451.   /* Process locked */
  452.   __HAL_LOCK(husart);
  453.  
  454.   if (husart->State == HAL_USART_STATE_READY)
  455.   {
  456.     switch (CallbackID)
  457.     {
  458.       case HAL_USART_TX_HALFCOMPLETE_CB_ID :
  459.         husart->TxHalfCpltCallback = pCallback;
  460.         break;
  461.  
  462.       case HAL_USART_TX_COMPLETE_CB_ID :
  463.         husart->TxCpltCallback = pCallback;
  464.         break;
  465.  
  466.       case HAL_USART_RX_HALFCOMPLETE_CB_ID :
  467.         husart->RxHalfCpltCallback = pCallback;
  468.         break;
  469.  
  470.       case HAL_USART_RX_COMPLETE_CB_ID :
  471.         husart->RxCpltCallback = pCallback;
  472.         break;
  473.  
  474.       case HAL_USART_TX_RX_COMPLETE_CB_ID :
  475.         husart->TxRxCpltCallback = pCallback;
  476.         break;
  477.  
  478.       case HAL_USART_ERROR_CB_ID :
  479.         husart->ErrorCallback = pCallback;
  480.         break;
  481.  
  482.       case HAL_USART_ABORT_COMPLETE_CB_ID :
  483.         husart->AbortCpltCallback = pCallback;
  484.         break;
  485.  
  486.       case HAL_USART_MSPINIT_CB_ID :
  487.         husart->MspInitCallback = pCallback;
  488.         break;
  489.  
  490.       case HAL_USART_MSPDEINIT_CB_ID :
  491.         husart->MspDeInitCallback = pCallback;
  492.         break;
  493.  
  494.       default :
  495.         /* Update the error code */
  496.         husart->ErrorCode |= HAL_USART_ERROR_INVALID_CALLBACK;
  497.  
  498.         /* Return error status */
  499.         status =  HAL_ERROR;
  500.         break;
  501.     }
  502.   }
  503.   else if (husart->State == HAL_USART_STATE_RESET)
  504.   {
  505.     switch (CallbackID)
  506.     {
  507.       case HAL_USART_MSPINIT_CB_ID :
  508.         husart->MspInitCallback = pCallback;
  509.         break;
  510.  
  511.       case HAL_USART_MSPDEINIT_CB_ID :
  512.         husart->MspDeInitCallback = pCallback;
  513.         break;
  514.  
  515.       default :
  516.         /* Update the error code */
  517.         husart->ErrorCode |= HAL_USART_ERROR_INVALID_CALLBACK;
  518.  
  519.         /* Return error status */
  520.         status =  HAL_ERROR;
  521.         break;
  522.     }
  523.   }
  524.   else
  525.   {
  526.     /* Update the error code */
  527.     husart->ErrorCode |= HAL_USART_ERROR_INVALID_CALLBACK;
  528.  
  529.     /* Return error status */
  530.     status =  HAL_ERROR;
  531.   }
  532.  
  533.   /* Release Lock */
  534.   __HAL_UNLOCK(husart);
  535.  
  536.   return status;
  537. }
  538.  
  539. /**
  540.   * @brief  Unregister an UART Callback
  541.   *         UART callaback is redirected to the weak predefined callback
  542.   * @param  husart uart handle
  543.   * @param  CallbackID ID of the callback to be unregistered
  544.   *         This parameter can be one of the following values:
  545.   *           @arg @ref HAL_USART_TX_HALFCOMPLETE_CB_ID Tx Half Complete Callback ID
  546.   *           @arg @ref HAL_USART_TX_COMPLETE_CB_ID Tx Complete Callback ID
  547.   *           @arg @ref HAL_USART_RX_HALFCOMPLETE_CB_ID Rx Half Complete Callback ID
  548.   *           @arg @ref HAL_USART_RX_COMPLETE_CB_ID Rx Complete Callback ID
  549.   *           @arg @ref HAL_USART_TX_RX_COMPLETE_CB_ID Rx Complete Callback ID
  550.   *           @arg @ref HAL_USART_ERROR_CB_ID Error Callback ID
  551.   *           @arg @ref HAL_USART_ABORT_COMPLETE_CB_ID Abort Complete Callback ID
  552.   *           @arg @ref HAL_USART_MSPINIT_CB_ID MspInit Callback ID
  553.   *           @arg @ref HAL_USART_MSPDEINIT_CB_ID MspDeInit Callback ID
  554.   * @retval HAL status
  555.   */
  556. HAL_StatusTypeDef HAL_USART_UnRegisterCallback(USART_HandleTypeDef *husart, HAL_USART_CallbackIDTypeDef CallbackID)
  557. {
  558.   HAL_StatusTypeDef status = HAL_OK;
  559.  
  560.   /* Process locked */
  561.   __HAL_LOCK(husart);
  562.  
  563.   if (husart->State == HAL_USART_STATE_READY)
  564.   {
  565.     switch (CallbackID)
  566.     {
  567.       case HAL_USART_TX_HALFCOMPLETE_CB_ID :
  568.         husart->TxHalfCpltCallback = HAL_USART_TxHalfCpltCallback;               /* Legacy weak  TxHalfCpltCallback       */
  569.         break;
  570.  
  571.       case HAL_USART_TX_COMPLETE_CB_ID :
  572.         husart->TxCpltCallback = HAL_USART_TxCpltCallback;                       /* Legacy weak TxCpltCallback            */
  573.         break;
  574.  
  575.       case HAL_USART_RX_HALFCOMPLETE_CB_ID :
  576.         husart->RxHalfCpltCallback = HAL_USART_RxHalfCpltCallback;               /* Legacy weak RxHalfCpltCallback        */
  577.         break;
  578.  
  579.       case HAL_USART_RX_COMPLETE_CB_ID :
  580.         husart->RxCpltCallback = HAL_USART_RxCpltCallback;                       /* Legacy weak RxCpltCallback            */
  581.         break;
  582.  
  583.       case HAL_USART_TX_RX_COMPLETE_CB_ID :
  584.         husart->TxRxCpltCallback = HAL_USART_TxRxCpltCallback;                   /* Legacy weak TxRxCpltCallback            */
  585.         break;
  586.  
  587.       case HAL_USART_ERROR_CB_ID :
  588.         husart->ErrorCallback = HAL_USART_ErrorCallback;                         /* Legacy weak ErrorCallback             */
  589.         break;
  590.  
  591.       case HAL_USART_ABORT_COMPLETE_CB_ID :
  592.         husart->AbortCpltCallback = HAL_USART_AbortCpltCallback;                 /* Legacy weak AbortCpltCallback         */
  593.         break;
  594.  
  595.       case HAL_USART_MSPINIT_CB_ID :
  596.         husart->MspInitCallback = HAL_USART_MspInit;                             /* Legacy weak MspInitCallback           */
  597.         break;
  598.  
  599.       case HAL_USART_MSPDEINIT_CB_ID :
  600.         husart->MspDeInitCallback = HAL_USART_MspDeInit;                         /* Legacy weak MspDeInitCallback         */
  601.         break;
  602.  
  603.       default :
  604.         /* Update the error code */
  605.         husart->ErrorCode |= HAL_USART_ERROR_INVALID_CALLBACK;
  606.  
  607.         /* Return error status */
  608.         status =  HAL_ERROR;
  609.         break;
  610.     }
  611.   }
  612.   else if (husart->State == HAL_USART_STATE_RESET)
  613.   {
  614.     switch (CallbackID)
  615.     {
  616.       case HAL_USART_MSPINIT_CB_ID :
  617.         husart->MspInitCallback = HAL_USART_MspInit;
  618.         break;
  619.  
  620.       case HAL_USART_MSPDEINIT_CB_ID :
  621.         husart->MspDeInitCallback = HAL_USART_MspDeInit;
  622.         break;
  623.  
  624.       default :
  625.         /* Update the error code */
  626.         husart->ErrorCode |= HAL_USART_ERROR_INVALID_CALLBACK;
  627.  
  628.         /* Return error status */
  629.         status =  HAL_ERROR;
  630.         break;
  631.     }
  632.   }
  633.   else
  634.   {
  635.     /* Update the error code */
  636.     husart->ErrorCode |= HAL_USART_ERROR_INVALID_CALLBACK;
  637.  
  638.     /* Return error status */
  639.     status =  HAL_ERROR;
  640.   }
  641.  
  642.   /* Release Lock */
  643.   __HAL_UNLOCK(husart);
  644.  
  645.   return status;
  646. }
  647. #endif /* USE_HAL_USART_REGISTER_CALLBACKS */
  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.   [..]
  661.     This subsection provides a set of functions allowing to manage the USART synchronous
  662.     data transfers.
  663.  
  664.   [..]
  665.     The USART supports master mode only: it cannot receive or send data related to an input
  666.     clock (SCLK is always an output).
  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()
  678.               user callbacks
  679.              will be executed respectively at the end of the transmit or Receive process
  680.              The HAL_USART_ErrorCallback() user callback will be executed when a communication
  681.              error is detected
  682.  
  683.     (#) Blocking mode APIs are :
  684.         (++) HAL_USART_Transmit() in simplex mode
  685.         (++) HAL_USART_Receive() in full duplex receive only
  686.         (++) HAL_USART_TransmitReceive() in full duplex mode
  687.  
  688.     (#) Non Blocking mode APIs with Interrupt are :
  689.         (++) HAL_USART_Transmit_IT()in simplex mode
  690.         (++) HAL_USART_Receive_IT() in full duplex receive only
  691.         (++) HAL_USART_TransmitReceive_IT() in full duplex mode
  692.         (++) HAL_USART_IRQHandler()
  693.  
  694.     (#) Non Blocking mode functions with DMA are :
  695.         (++) HAL_USART_Transmit_DMA()in simplex mode
  696.         (++) HAL_USART_Receive_DMA() in full duplex receive only
  697.         (++) HAL_USART_TransmitReceive_DMA() in full duplex mode
  698.         (++) HAL_USART_DMAPause()
  699.         (++) HAL_USART_DMAResume()
  700.         (++) HAL_USART_DMAStop()
  701.  
  702.     (#) A set of Transfer Complete Callbacks are provided in non Blocking mode:
  703.         (++) HAL_USART_TxHalfCpltCallback()
  704.         (++) HAL_USART_TxCpltCallback()
  705.         (++) HAL_USART_RxHalfCpltCallback()
  706.         (++) HAL_USART_RxCpltCallback()
  707.         (++) HAL_USART_ErrorCallback()
  708.         (++) HAL_USART_TxRxCpltCallback()
  709.  
  710.     (#) Non-Blocking mode transfers could be aborted using Abort API's :
  711.         (++) HAL_USART_Abort()
  712.         (++) HAL_USART_Abort_IT()
  713.  
  714.     (#) For Abort services based on interrupts (HAL_USART_Abort_IT), a Abort Complete Callbacks is provided:
  715.         (++) HAL_USART_AbortCpltCallback()
  716.  
  717.     (#) In Non-Blocking mode transfers, possible errors are split into 2 categories.
  718.         Errors are handled as follows :
  719.         (++) Error is considered as Recoverable and non blocking : Transfer could go till end, but error severity is
  720.              to be evaluated by user : this concerns Frame Error, Parity Error or Noise Error in Interrupt mode reception .
  721.              Received character is then retrieved and stored in Rx buffer, Error code is set to allow user to identify error type,
  722.              and HAL_USART_ErrorCallback() user callback is executed. Transfer is kept ongoing on USART side.
  723.              If user wants to abort it, Abort services should be called by user.
  724.         (++) Error is considered as Blocking : Transfer could not be completed properly and is aborted.
  725.              This concerns Overrun Error In Interrupt mode reception and all errors in DMA mode.
  726.              Error code is set to allow user to identify error type, and HAL_USART_ErrorCallback() user callback is executed.
  727.  
  728. @endverbatim
  729.   * @{
  730.   */
  731.  
  732. /**
  733.   * @brief  Simplex Send an amount of data in blocking mode.
  734.   * @note   When UART parity is not enabled (PCE = 0), and Word Length is configured to 9 bits (M1-M0 = 01),
  735.   *         the sent data is handled as a set of u16. In this case, Size must indicate the number
  736.   *         of u16 provided through pTxData.
  737.   * @param  husart  Pointer to a USART_HandleTypeDef structure that contains
  738.   *                 the configuration information for the specified USART module.
  739.   * @param  pTxData Pointer to data buffer (u8 or u16 data elements).
  740.   * @param  Size    Amount of data elements (u8 or u16) to be sent.
  741.   * @param  Timeout Timeout duration.
  742.   * @retval HAL status
  743.   */
  744. HAL_StatusTypeDef HAL_USART_Transmit(USART_HandleTypeDef *husart, uint8_t *pTxData, uint16_t Size, uint32_t Timeout)
  745. {
  746.   uint16_t *tmp;
  747.   uint32_t tickstart = 0U;
  748.  
  749.   if (husart->State == HAL_USART_STATE_READY)
  750.   {
  751.     if ((pTxData == NULL) || (Size == 0))
  752.     {
  753.       return  HAL_ERROR;
  754.     }
  755.  
  756.     /* Process Locked */
  757.     __HAL_LOCK(husart);
  758.  
  759.     husart->ErrorCode = HAL_USART_ERROR_NONE;
  760.     husart->State = HAL_USART_STATE_BUSY_TX;
  761.  
  762.     /* Init tickstart for timeout management */
  763.     tickstart = HAL_GetTick();
  764.  
  765.     husart->TxXferSize = Size;
  766.     husart->TxXferCount = Size;
  767.     while (husart->TxXferCount > 0U)
  768.     {
  769.       husart->TxXferCount--;
  770.       if (husart->Init.WordLength == USART_WORDLENGTH_9B)
  771.       {
  772.         /* Wait for TC flag in order to write data in DR */
  773.         if (USART_WaitOnFlagUntilTimeout(husart, USART_FLAG_TXE, RESET, tickstart, Timeout) != HAL_OK)
  774.         {
  775.           return HAL_TIMEOUT;
  776.         }
  777.         tmp = (uint16_t *) pTxData;
  778.         husart->Instance->DR = (*tmp & (uint16_t)0x01FF);
  779.         if (husart->Init.Parity == USART_PARITY_NONE)
  780.         {
  781.           pTxData += 2U;
  782.         }
  783.         else
  784.         {
  785.           pTxData += 1U;
  786.         }
  787.       }
  788.       else
  789.       {
  790.         if (USART_WaitOnFlagUntilTimeout(husart, USART_FLAG_TXE, RESET, tickstart, Timeout) != HAL_OK)
  791.         {
  792.           return HAL_TIMEOUT;
  793.         }
  794.         husart->Instance->DR = (*pTxData++ & (uint8_t)0xFF);
  795.       }
  796.     }
  797.  
  798.     if (USART_WaitOnFlagUntilTimeout(husart, USART_FLAG_TC, RESET, tickstart, Timeout) != HAL_OK)
  799.     {
  800.       return HAL_TIMEOUT;
  801.     }
  802.  
  803.     husart->State = HAL_USART_STATE_READY;
  804.  
  805.     /* Process Unlocked */
  806.     __HAL_UNLOCK(husart);
  807.  
  808.     return HAL_OK;
  809.   }
  810.   else
  811.   {
  812.     return HAL_BUSY;
  813.   }
  814. }
  815.  
  816. /**
  817.   * @brief  Full-Duplex Receive an amount of data in blocking mode.
  818.   * @note   To receive synchronous data, dummy data are simultaneously transmitted.
  819.   * @note   When UART parity is not enabled (PCE = 0), and Word Length is configured to 9 bits (M1-M0 = 01),
  820.   *         the received data is handled as a set of u16. In this case, Size must indicate the number
  821.   *         of u16 available through pRxData.
  822.   * @param  husart  Pointer to a USART_HandleTypeDef structure that contains
  823.   *                 the configuration information for the specified USART module.
  824.   * @param  pRxData Pointer to data buffer (u8 or u16 data elements).
  825.   * @param  Size    Amount of data elements (u8 or u16) to be received.
  826.   * @param  Timeout Timeout duration.
  827.   * @retval HAL status
  828.   */
  829. HAL_StatusTypeDef HAL_USART_Receive(USART_HandleTypeDef *husart, uint8_t *pRxData, uint16_t Size, uint32_t Timeout)
  830. {
  831.   uint16_t *tmp;
  832.   uint32_t tickstart = 0U;
  833.  
  834.   if (husart->State == HAL_USART_STATE_READY)
  835.   {
  836.     if ((pRxData == NULL) || (Size == 0))
  837.     {
  838.       return  HAL_ERROR;
  839.     }
  840.     /* Process Locked */
  841.     __HAL_LOCK(husart);
  842.  
  843.     husart->ErrorCode = HAL_USART_ERROR_NONE;
  844.     husart->State = HAL_USART_STATE_BUSY_RX;
  845.  
  846.     /* Init tickstart for timeout management */
  847.     tickstart = HAL_GetTick();
  848.  
  849.     husart->RxXferSize = Size;
  850.     husart->RxXferCount = Size;
  851.     /* Check the remain data to be received */
  852.     while (husart->RxXferCount > 0U)
  853.     {
  854.       husart->RxXferCount--;
  855.       if (husart->Init.WordLength == USART_WORDLENGTH_9B)
  856.       {
  857.         /* Wait until TXE flag is set to send dummy byte in order to generate the clock for the slave to send data */
  858.         if (USART_WaitOnFlagUntilTimeout(husart, USART_FLAG_TXE, RESET, tickstart, Timeout) != HAL_OK)
  859.         {
  860.           return HAL_TIMEOUT;
  861.         }
  862.         /* Send dummy byte in order to generate clock */
  863.         husart->Instance->DR = (DUMMY_DATA & (uint16_t)0x01FF);
  864.  
  865.         /* Wait for RXNE Flag */
  866.         if (USART_WaitOnFlagUntilTimeout(husart, USART_FLAG_RXNE, RESET, tickstart, Timeout) != HAL_OK)
  867.         {
  868.           return HAL_TIMEOUT;
  869.         }
  870.         tmp = (uint16_t *) pRxData ;
  871.         if (husart->Init.Parity == USART_PARITY_NONE)
  872.         {
  873.           *tmp = (uint16_t)(husart->Instance->DR & (uint16_t)0x01FF);
  874.           pRxData += 2U;
  875.         }
  876.         else
  877.         {
  878.           *tmp = (uint16_t)(husart->Instance->DR & (uint16_t)0x00FF);
  879.           pRxData += 1U;
  880.         }
  881.       }
  882.       else
  883.       {
  884.         /* Wait until TXE flag is set to send dummy byte in order to generate the clock for the slave to send data */
  885.         if (USART_WaitOnFlagUntilTimeout(husart, USART_FLAG_TXE, RESET, tickstart, Timeout) != HAL_OK)
  886.         {
  887.           return HAL_TIMEOUT;
  888.         }
  889.  
  890.         /* Send Dummy Byte in order to generate clock */
  891.         husart->Instance->DR = (DUMMY_DATA & (uint16_t)0x00FF);
  892.  
  893.         /* Wait until RXNE flag is set to receive the byte */
  894.         if (USART_WaitOnFlagUntilTimeout(husart, USART_FLAG_RXNE, RESET, tickstart, Timeout) != HAL_OK)
  895.         {
  896.           return HAL_TIMEOUT;
  897.         }
  898.         if (husart->Init.Parity == USART_PARITY_NONE)
  899.         {
  900.           /* Receive data */
  901.           *pRxData++ = (uint8_t)(husart->Instance->DR & (uint8_t)0x00FF);
  902.         }
  903.         else
  904.         {
  905.           /* Receive data */
  906.           *pRxData++ = (uint8_t)(husart->Instance->DR & (uint8_t)0x007F);
  907.         }
  908.  
  909.       }
  910.     }
  911.  
  912.     husart->State = HAL_USART_STATE_READY;
  913.  
  914.     /* Process Unlocked */
  915.     __HAL_UNLOCK(husart);
  916.  
  917.     return HAL_OK;
  918.   }
  919.   else
  920.   {
  921.     return HAL_BUSY;
  922.   }
  923. }
  924.  
  925. /**
  926.   * @brief  Full-Duplex Send and Receive an amount of data in full-duplex mode (blocking mode).
  927.   * @note   When UART parity is not enabled (PCE = 0), and Word Length is configured to 9 bits (M1-M0 = 01),
  928.   *         the sent data and the received data are handled as sets of u16. In this case, Size must indicate the number
  929.   *         of u16 available through pTxData and through pRxData.
  930.   * @param  husart  Pointer to a USART_HandleTypeDef structure that contains
  931.   *                 the configuration information for the specified USART module.
  932.   * @param  pTxData Pointer to TX data buffer (u8 or u16 data elements).
  933.   * @param  pRxData Pointer to RX data buffer (u8 or u16 data elements).
  934.   * @param  Size    Amount of data elements (u8 or u16) to be sent (same amount to be received).
  935.   * @param  Timeout Timeout duration
  936.   * @retval HAL status
  937.   */
  938. HAL_StatusTypeDef HAL_USART_TransmitReceive(USART_HandleTypeDef *husart, uint8_t *pTxData, uint8_t *pRxData, uint16_t Size, uint32_t Timeout)
  939. {
  940.   uint16_t *tmp;
  941.   uint32_t tickstart = 0U;
  942.  
  943.   if (husart->State == HAL_USART_STATE_READY)
  944.   {
  945.     if ((pTxData == NULL) || (pRxData == NULL) || (Size == 0))
  946.     {
  947.       return  HAL_ERROR;
  948.     }
  949.     /* Process Locked */
  950.     __HAL_LOCK(husart);
  951.  
  952.     husart->ErrorCode = HAL_USART_ERROR_NONE;
  953.     husart->State = HAL_USART_STATE_BUSY_RX;
  954.  
  955.     /* Init tickstart for timeout management */
  956.     tickstart = HAL_GetTick();
  957.  
  958.     husart->RxXferSize = Size;
  959.     husart->TxXferSize = Size;
  960.     husart->TxXferCount = Size;
  961.     husart->RxXferCount = Size;
  962.  
  963.     /* Check the remain data to be received */
  964.     while (husart->TxXferCount > 0U)
  965.     {
  966.       husart->TxXferCount--;
  967.       husart->RxXferCount--;
  968.       if (husart->Init.WordLength == USART_WORDLENGTH_9B)
  969.       {
  970.         /* Wait for TC flag in order to write data in DR */
  971.         if (USART_WaitOnFlagUntilTimeout(husart, USART_FLAG_TXE, RESET, tickstart, Timeout) != HAL_OK)
  972.         {
  973.           return HAL_TIMEOUT;
  974.         }
  975.         tmp = (uint16_t *) pTxData;
  976.         husart->Instance->DR = (*tmp & (uint16_t)0x01FF);
  977.         if (husart->Init.Parity == USART_PARITY_NONE)
  978.         {
  979.           pTxData += 2U;
  980.         }
  981.         else
  982.         {
  983.           pTxData += 1U;
  984.         }
  985.  
  986.         /* Wait for RXNE Flag */
  987.         if (USART_WaitOnFlagUntilTimeout(husart, USART_FLAG_RXNE, RESET, tickstart, Timeout) != HAL_OK)
  988.         {
  989.           return HAL_TIMEOUT;
  990.         }
  991.         tmp = (uint16_t *) pRxData ;
  992.         if (husart->Init.Parity == USART_PARITY_NONE)
  993.         {
  994.           *tmp = (uint16_t)(husart->Instance->DR & (uint16_t)0x01FF);
  995.           pRxData += 2U;
  996.         }
  997.         else
  998.         {
  999.           *tmp = (uint16_t)(husart->Instance->DR & (uint16_t)0x00FF);
  1000.           pRxData += 1U;
  1001.         }
  1002.       }
  1003.       else
  1004.       {
  1005.         /* Wait for TC flag in order to write data in DR */
  1006.         if (USART_WaitOnFlagUntilTimeout(husart, USART_FLAG_TXE, RESET, tickstart, Timeout) != HAL_OK)
  1007.         {
  1008.           return HAL_TIMEOUT;
  1009.         }
  1010.         husart->Instance->DR = (*pTxData++ & (uint8_t)0x00FF);
  1011.  
  1012.         /* Wait for RXNE Flag */
  1013.         if (USART_WaitOnFlagUntilTimeout(husart, USART_FLAG_RXNE, RESET, tickstart, Timeout) != HAL_OK)
  1014.         {
  1015.           return HAL_TIMEOUT;
  1016.         }
  1017.         if (husart->Init.Parity == USART_PARITY_NONE)
  1018.         {
  1019.           /* Receive data */
  1020.           *pRxData++ = (uint8_t)(husart->Instance->DR & (uint8_t)0x00FF);
  1021.         }
  1022.         else
  1023.         {
  1024.           /* Receive data */
  1025.           *pRxData++ = (uint8_t)(husart->Instance->DR & (uint8_t)0x007F);
  1026.         }
  1027.       }
  1028.     }
  1029.  
  1030.     husart->State = HAL_USART_STATE_READY;
  1031.  
  1032.     /* Process Unlocked */
  1033.     __HAL_UNLOCK(husart);
  1034.  
  1035.     return HAL_OK;
  1036.   }
  1037.   else
  1038.   {
  1039.     return HAL_BUSY;
  1040.   }
  1041. }
  1042.  
  1043. /**
  1044.   * @brief  Simplex Send an amount of data in non-blocking mode.
  1045.   * @note   When UART parity is not enabled (PCE = 0), and Word Length is configured to 9 bits (M1-M0 = 01),
  1046.   *         the sent data is handled as a set of u16. In this case, Size must indicate the number
  1047.   *         of u16 provided through pTxData.
  1048.   * @param  husart  Pointer to a USART_HandleTypeDef structure that contains
  1049.   *                 the configuration information for the specified USART module.
  1050.   * @param  pTxData Pointer to data buffer (u8 or u16 data elements).
  1051.   * @param  Size    Amount of data elements (u8 or u16) to be sent.
  1052.   * @retval HAL status
  1053.   * @note   The USART errors are not managed to avoid the overrun error.
  1054.   */
  1055. HAL_StatusTypeDef HAL_USART_Transmit_IT(USART_HandleTypeDef *husart, uint8_t *pTxData, uint16_t Size)
  1056. {
  1057.   if (husart->State == HAL_USART_STATE_READY)
  1058.   {
  1059.     if ((pTxData == NULL) || (Size == 0))
  1060.     {
  1061.       return HAL_ERROR;
  1062.     }
  1063.  
  1064.     /* Process Locked */
  1065.     __HAL_LOCK(husart);
  1066.  
  1067.     husart->pTxBuffPtr = pTxData;
  1068.     husart->TxXferSize = Size;
  1069.     husart->TxXferCount = Size;
  1070.  
  1071.     husart->ErrorCode = HAL_USART_ERROR_NONE;
  1072.     husart->State = HAL_USART_STATE_BUSY_TX;
  1073.  
  1074.     /* The USART Error Interrupts: (Frame error, Noise error, Overrun error)
  1075.        are not managed by the USART transmit process to avoid the overrun interrupt
  1076.        when the USART mode is configured for transmit and receive "USART_MODE_TX_RX"
  1077.        to benefit for the frame error and noise interrupts the USART mode should be
  1078.        configured only for transmit "USART_MODE_TX"
  1079.        The __HAL_USART_ENABLE_IT(husart, USART_IT_ERR) can be used to enable the Frame error,
  1080.        Noise error interrupt */
  1081.  
  1082.     /* Process Unlocked */
  1083.     __HAL_UNLOCK(husart);
  1084.  
  1085.     /* Enable the USART Transmit Data Register Empty Interrupt */
  1086.     SET_BIT(husart->Instance->CR1, USART_CR1_TXEIE);
  1087.  
  1088.     return HAL_OK;
  1089.   }
  1090.   else
  1091.   {
  1092.     return HAL_BUSY;
  1093.   }
  1094. }
  1095.  
  1096. /**
  1097.   * @brief  Simplex Receive an amount of data in non-blocking mode.
  1098.   * @note   To receive synchronous data, dummy data are simultaneously transmitted.
  1099.   * @note   When UART parity is not enabled (PCE = 0), and Word Length is configured to 9 bits (M1-M0 = 01),
  1100.   *         the received data is handled as a set of u16. In this case, Size must indicate the number
  1101.   *         of u16 available through pRxData.
  1102.   * @param  husart  Pointer to a USART_HandleTypeDef structure that contains
  1103.   *                 the configuration information for the specified USART module.
  1104.   * @param  pRxData Pointer to data buffer (u8 or u16 data elements).
  1105.   * @param  Size    Amount of data elements (u8 or u16) to be received.
  1106.   * @retval HAL status
  1107.   */
  1108. HAL_StatusTypeDef HAL_USART_Receive_IT(USART_HandleTypeDef *husart, uint8_t *pRxData, uint16_t Size)
  1109. {
  1110.   if (husart->State == HAL_USART_STATE_READY)
  1111.   {
  1112.     if ((pRxData == NULL) || (Size == 0))
  1113.     {
  1114.       return HAL_ERROR;
  1115.     }
  1116.     /* Process Locked */
  1117.     __HAL_LOCK(husart);
  1118.  
  1119.     husart->pRxBuffPtr = pRxData;
  1120.     husart->RxXferSize = Size;
  1121.     husart->RxXferCount = Size;
  1122.  
  1123.     husart->ErrorCode = HAL_USART_ERROR_NONE;
  1124.     husart->State = HAL_USART_STATE_BUSY_RX;
  1125.  
  1126.     /* Process Unlocked */
  1127.     __HAL_UNLOCK(husart);
  1128.  
  1129.     /* Enable the USART Parity Error and Data Register not empty Interrupts */
  1130.     SET_BIT(husart->Instance->CR1, USART_CR1_PEIE | USART_CR1_RXNEIE);
  1131.  
  1132.     /* Enable the USART Error Interrupt: (Frame error, noise error, overrun error) */
  1133.     SET_BIT(husart->Instance->CR3, USART_CR3_EIE);
  1134.  
  1135.     /* Send dummy byte in order to generate the clock for the slave to send data */
  1136.     husart->Instance->DR = (DUMMY_DATA & (uint16_t)0x01FF);
  1137.  
  1138.     return HAL_OK;
  1139.   }
  1140.   else
  1141.   {
  1142.     return HAL_BUSY;
  1143.   }
  1144. }
  1145.  
  1146. /**
  1147.   * @brief  Full-Duplex Send and Receive an amount of data in full-duplex mode (non-blocking).
  1148.   * @note   When UART parity is not enabled (PCE = 0), and Word Length is configured to 9 bits (M1-M0 = 01),
  1149.   *         the sent data and the received data are handled as sets of u16. In this case, Size must indicate the number
  1150.   *         of u16 available through pTxData and through pRxData.
  1151.   * @param  husart  Pointer to a USART_HandleTypeDef structure that contains
  1152.   *                 the configuration information for the specified USART module.
  1153.   * @param  pTxData Pointer to TX data buffer (u8 or u16 data elements).
  1154.   * @param  pRxData Pointer to RX data buffer (u8 or u16 data elements).
  1155.   * @param  Size    Amount of data elements (u8 or u16) to be sent (same amount to be received).
  1156.   * @retval HAL status
  1157.   */
  1158. HAL_StatusTypeDef HAL_USART_TransmitReceive_IT(USART_HandleTypeDef *husart, uint8_t *pTxData, uint8_t *pRxData,  uint16_t Size)
  1159. {
  1160.   if (husart->State == HAL_USART_STATE_READY)
  1161.   {
  1162.     if ((pTxData == NULL) || (pRxData == NULL) || (Size == 0))
  1163.     {
  1164.       return HAL_ERROR;
  1165.     }
  1166.     /* Process Locked */
  1167.     __HAL_LOCK(husart);
  1168.  
  1169.     husart->pRxBuffPtr = pRxData;
  1170.     husart->RxXferSize = Size;
  1171.     husart->RxXferCount = Size;
  1172.     husart->pTxBuffPtr = pTxData;
  1173.     husart->TxXferSize = Size;
  1174.     husart->TxXferCount = Size;
  1175.  
  1176.     husart->ErrorCode = HAL_USART_ERROR_NONE;
  1177.     husart->State = HAL_USART_STATE_BUSY_TX_RX;
  1178.  
  1179.     /* Process Unlocked */
  1180.     __HAL_UNLOCK(husart);
  1181.  
  1182.     /* Enable the USART Data Register not empty Interrupt */
  1183.     SET_BIT(husart->Instance->CR1, USART_CR1_RXNEIE);
  1184.  
  1185.     /* Enable the USART Parity Error Interrupt */
  1186.     SET_BIT(husart->Instance->CR1, USART_CR1_PEIE);
  1187.  
  1188.     /* Enable the USART Error Interrupt: (Frame error, noise error, overrun error) */
  1189.     SET_BIT(husart->Instance->CR3, USART_CR3_EIE);
  1190.  
  1191.     /* Enable the USART Transmit Data Register Empty Interrupt */
  1192.     SET_BIT(husart->Instance->CR1, USART_CR1_TXEIE);
  1193.  
  1194.     return HAL_OK;
  1195.   }
  1196.   else
  1197.   {
  1198.     return HAL_BUSY;
  1199.   }
  1200. }
  1201.  
  1202. /**
  1203.   * @brief  Simplex Send an amount of data in DMA mode.
  1204.   * @note   When UART parity is not enabled (PCE = 0), and Word Length is configured to 9 bits (M1-M0 = 01),
  1205.   *         the sent data is handled as a set of u16. In this case, Size must indicate the number
  1206.   *         of u16 provided through pTxData.
  1207.   * @param  husart  Pointer to a USART_HandleTypeDef structure that contains
  1208.   *                 the configuration information for the specified USART module.
  1209.   * @param  pTxData Pointer to data buffer (u8 or u16 data elements).
  1210.   * @param  Size    Amount of data elements (u8 or u16) to be sent.
  1211.   * @retval HAL status
  1212.   */
  1213. HAL_StatusTypeDef HAL_USART_Transmit_DMA(USART_HandleTypeDef *husart, uint8_t *pTxData, uint16_t Size)
  1214. {
  1215.   uint32_t *tmp;
  1216.  
  1217.   if (husart->State == HAL_USART_STATE_READY)
  1218.   {
  1219.     if ((pTxData == NULL) || (Size == 0))
  1220.     {
  1221.       return HAL_ERROR;
  1222.     }
  1223.     /* Process Locked */
  1224.     __HAL_LOCK(husart);
  1225.  
  1226.     husart->pTxBuffPtr = pTxData;
  1227.     husart->TxXferSize = Size;
  1228.     husart->TxXferCount = Size;
  1229.  
  1230.     husart->ErrorCode = HAL_USART_ERROR_NONE;
  1231.     husart->State = HAL_USART_STATE_BUSY_TX;
  1232.  
  1233.     /* Set the USART DMA transfer complete callback */
  1234.     husart->hdmatx->XferCpltCallback = USART_DMATransmitCplt;
  1235.  
  1236.     /* Set the USART DMA Half transfer complete callback */
  1237.     husart->hdmatx->XferHalfCpltCallback = USART_DMATxHalfCplt;
  1238.  
  1239.     /* Set the DMA error callback */
  1240.     husart->hdmatx->XferErrorCallback = USART_DMAError;
  1241.  
  1242.     /* Set the DMA abort callback */
  1243.     husart->hdmatx->XferAbortCallback = NULL;
  1244.  
  1245.     /* Enable the USART transmit DMA channel */
  1246.     tmp = (uint32_t *)&pTxData;
  1247.     HAL_DMA_Start_IT(husart->hdmatx, *(uint32_t *)tmp, (uint32_t)&husart->Instance->DR, Size);
  1248.  
  1249.     /* Clear the TC flag in the SR register by writing 0 to it */
  1250.     __HAL_USART_CLEAR_FLAG(husart, USART_FLAG_TC);
  1251.  
  1252.     /* Process Unlocked */
  1253.     __HAL_UNLOCK(husart);
  1254.  
  1255.     /* Enable the DMA transfer for transmit request by setting the DMAT bit
  1256.     in the USART CR3 register */
  1257.     SET_BIT(husart->Instance->CR3, USART_CR3_DMAT);
  1258.  
  1259.     return HAL_OK;
  1260.   }
  1261.   else
  1262.   {
  1263.     return HAL_BUSY;
  1264.   }
  1265. }
  1266.  
  1267. /**
  1268.   * @brief  Full-Duplex Receive an amount of data in DMA mode.
  1269.   * @note   When UART parity is not enabled (PCE = 0), and Word Length is configured to 9 bits (M1-M0 = 01),
  1270.   *         the received data is handled as a set of u16. In this case, Size must indicate the number
  1271.   *         of u16 available through pRxData.
  1272.   * @param  husart  Pointer to a USART_HandleTypeDef structure that contains
  1273.   *                 the configuration information for the specified USART module.
  1274.   * @param  pRxData Pointer to data buffer (u8 or u16 data elements).
  1275.   * @param  Size    Amount of data elements (u8 or u16) to be received.
  1276.   * @retval HAL status
  1277.   * @note   The USART DMA transmit channel must be configured in order to generate the clock for the slave.
  1278.   * @note   When the USART parity is enabled (PCE = 1) the data received contain the parity bit.
  1279.   */
  1280. HAL_StatusTypeDef HAL_USART_Receive_DMA(USART_HandleTypeDef *husart, uint8_t *pRxData, uint16_t Size)
  1281. {
  1282.   uint32_t *tmp;
  1283.  
  1284.   if (husart->State == HAL_USART_STATE_READY)
  1285.   {
  1286.     if ((pRxData == NULL) || (Size == 0))
  1287.     {
  1288.       return HAL_ERROR;
  1289.     }
  1290.  
  1291.     /* Process Locked */
  1292.     __HAL_LOCK(husart);
  1293.  
  1294.     husart->pRxBuffPtr = pRxData;
  1295.     husart->RxXferSize = Size;
  1296.     husart->pTxBuffPtr = pRxData;
  1297.     husart->TxXferSize = Size;
  1298.  
  1299.     husart->ErrorCode = HAL_USART_ERROR_NONE;
  1300.     husart->State = HAL_USART_STATE_BUSY_RX;
  1301.  
  1302.     /* Set the USART DMA Rx transfer complete callback */
  1303.     husart->hdmarx->XferCpltCallback = USART_DMAReceiveCplt;
  1304.  
  1305.     /* Set the USART DMA Half transfer complete callback */
  1306.     husart->hdmarx->XferHalfCpltCallback = USART_DMARxHalfCplt;
  1307.  
  1308.     /* Set the USART DMA Rx transfer error callback */
  1309.     husart->hdmarx->XferErrorCallback = USART_DMAError;
  1310.  
  1311.     /* Set the DMA abort callback */
  1312.     husart->hdmarx->XferAbortCallback = NULL;
  1313.  
  1314.     /* Set the USART Tx DMA transfer complete callback as NULL because the communication closing
  1315.     is performed in DMA reception complete callback  */
  1316.     husart->hdmatx->XferHalfCpltCallback = NULL;
  1317.     husart->hdmatx->XferCpltCallback = NULL;
  1318.  
  1319.     /* Set the DMA error callback */
  1320.     husart->hdmatx->XferErrorCallback = USART_DMAError;
  1321.  
  1322.     /* Set the DMA AbortCpltCallback */
  1323.     husart->hdmatx->XferAbortCallback = NULL;
  1324.  
  1325.     /* Enable the USART receive DMA channel */
  1326.     tmp = (uint32_t *)&pRxData;
  1327.     HAL_DMA_Start_IT(husart->hdmarx, (uint32_t)&husart->Instance->DR, *(uint32_t *)tmp, Size);
  1328.  
  1329.     /* Enable the USART transmit DMA channel: the transmit channel is used in order
  1330.        to generate in the non-blocking mode the clock to the slave device,
  1331.        this mode isn't a simplex receive mode but a full-duplex receive one */
  1332.     HAL_DMA_Start_IT(husart->hdmatx, *(uint32_t *)tmp, (uint32_t)&husart->Instance->DR, Size);
  1333.  
  1334.     /* Clear the Overrun flag just before enabling the DMA Rx request: mandatory for the second transfer */
  1335.     __HAL_USART_CLEAR_OREFLAG(husart);
  1336.  
  1337.     /* Process Unlocked */
  1338.     __HAL_UNLOCK(husart);
  1339.  
  1340.     /* Enable the USART Parity Error Interrupt */
  1341.     SET_BIT(husart->Instance->CR1, USART_CR1_PEIE);
  1342.  
  1343.     /* Enable the USART Error Interrupt: (Frame error, noise error, overrun error) */
  1344.     SET_BIT(husart->Instance->CR3, USART_CR3_EIE);
  1345.  
  1346.     /* Enable the DMA transfer for the receiver request by setting the DMAR bit
  1347.        in the USART CR3 register */
  1348.     SET_BIT(husart->Instance->CR3, USART_CR3_DMAR);
  1349.  
  1350.     /* Enable the DMA transfer for transmit request by setting the DMAT bit
  1351.        in the USART CR3 register */
  1352.     SET_BIT(husart->Instance->CR3, USART_CR3_DMAT);
  1353.  
  1354.     return HAL_OK;
  1355.   }
  1356.   else
  1357.   {
  1358.     return HAL_BUSY;
  1359.   }
  1360. }
  1361.  
  1362. /**
  1363.   * @brief  Full-Duplex Transmit Receive an amount of data in DMA mode.
  1364.   * @note   When UART parity is not enabled (PCE = 0), and Word Length is configured to 9 bits (M1-M0 = 01),
  1365.   *         the sent data and the received data are handled as sets of u16. In this case, Size must indicate the number
  1366.   *         of u16 available through pTxData and through pRxData.
  1367.   * @param  husart  Pointer to a USART_HandleTypeDef structure that contains
  1368.   *                 the configuration information for the specified USART module.
  1369.   * @param  pTxData Pointer to TX data buffer (u8 or u16 data elements).
  1370.   * @param  pRxData Pointer to RX data buffer (u8 or u16 data elements).
  1371.   * @param  Size    Amount of data elements (u8 or u16) to be received/sent.
  1372.   * @note   When the USART parity is enabled (PCE = 1) the data received contain the parity bit.
  1373.   * @retval HAL status
  1374.   */
  1375. HAL_StatusTypeDef HAL_USART_TransmitReceive_DMA(USART_HandleTypeDef *husart, uint8_t *pTxData, uint8_t *pRxData, uint16_t Size)
  1376. {
  1377.   uint32_t *tmp;
  1378.  
  1379.   if (husart->State == HAL_USART_STATE_READY)
  1380.   {
  1381.     if ((pTxData == NULL) || (pRxData == NULL) || (Size == 0))
  1382.     {
  1383.       return HAL_ERROR;
  1384.     }
  1385.     /* Process Locked */
  1386.     __HAL_LOCK(husart);
  1387.  
  1388.     husart->pRxBuffPtr = pRxData;
  1389.     husart->RxXferSize = Size;
  1390.     husart->pTxBuffPtr = pTxData;
  1391.     husart->TxXferSize = Size;
  1392.  
  1393.     husart->ErrorCode = HAL_USART_ERROR_NONE;
  1394.     husart->State = HAL_USART_STATE_BUSY_TX_RX;
  1395.  
  1396.     /* Set the USART DMA Rx transfer complete callback */
  1397.     husart->hdmarx->XferCpltCallback = USART_DMAReceiveCplt;
  1398.  
  1399.     /* Set the USART DMA Half transfer complete callback */
  1400.     husart->hdmarx->XferHalfCpltCallback = USART_DMARxHalfCplt;
  1401.  
  1402.     /* Set the USART DMA Tx transfer complete callback */
  1403.     husart->hdmatx->XferCpltCallback = USART_DMATransmitCplt;
  1404.  
  1405.     /* Set the USART DMA Half transfer complete callback */
  1406.     husart->hdmatx->XferHalfCpltCallback = USART_DMATxHalfCplt;
  1407.  
  1408.     /* Set the USART DMA Tx transfer error callback */
  1409.     husart->hdmatx->XferErrorCallback = USART_DMAError;
  1410.  
  1411.     /* Set the USART DMA Rx transfer error callback */
  1412.     husart->hdmarx->XferErrorCallback = USART_DMAError;
  1413.  
  1414.     /* Set the DMA abort callback */
  1415.     husart->hdmarx->XferAbortCallback = NULL;
  1416.  
  1417.     /* Enable the USART receive DMA channel */
  1418.     tmp = (uint32_t *)&pRxData;
  1419.     HAL_DMA_Start_IT(husart->hdmarx, (uint32_t)&husart->Instance->DR, *(uint32_t *)tmp, Size);
  1420.  
  1421.     /* Enable the USART transmit DMA channel */
  1422.     tmp = (uint32_t *)&pTxData;
  1423.     HAL_DMA_Start_IT(husart->hdmatx, *(uint32_t *)tmp, (uint32_t)&husart->Instance->DR, Size);
  1424.  
  1425.     /* Clear the TC flag in the SR register by writing 0 to it */
  1426.     __HAL_USART_CLEAR_FLAG(husart, USART_FLAG_TC);
  1427.  
  1428.     /* Clear the Overrun flag: mandatory for the second transfer in circular mode */
  1429.     __HAL_USART_CLEAR_OREFLAG(husart);
  1430.  
  1431.     /* Process Unlocked */
  1432.     __HAL_UNLOCK(husart);
  1433.  
  1434.     /* Enable the USART Parity Error Interrupt */
  1435.     SET_BIT(husart->Instance->CR1, USART_CR1_PEIE);
  1436.  
  1437.     /* Enable the USART Error Interrupt: (Frame error, noise error, overrun error) */
  1438.     SET_BIT(husart->Instance->CR3, USART_CR3_EIE);
  1439.  
  1440.     /* Enable the DMA transfer for the receiver request by setting the DMAR bit
  1441.        in the USART CR3 register */
  1442.     SET_BIT(husart->Instance->CR3, USART_CR3_DMAR);
  1443.  
  1444.     /* Enable the DMA transfer for transmit request by setting the DMAT bit
  1445.        in the USART CR3 register */
  1446.     SET_BIT(husart->Instance->CR3, USART_CR3_DMAT);
  1447.  
  1448.     return HAL_OK;
  1449.   }
  1450.   else
  1451.   {
  1452.     return HAL_BUSY;
  1453.   }
  1454. }
  1455.  
  1456. /**
  1457.   * @brief  Pauses the DMA Transfer.
  1458.   * @param  husart Pointer to a USART_HandleTypeDef structure that contains
  1459.   *                the configuration information for the specified USART module.
  1460.   * @retval HAL status
  1461.   */
  1462. HAL_StatusTypeDef HAL_USART_DMAPause(USART_HandleTypeDef *husart)
  1463. {
  1464.   /* Process Locked */
  1465.   __HAL_LOCK(husart);
  1466.  
  1467.   /* Disable the USART DMA Tx request */
  1468.   CLEAR_BIT(husart->Instance->CR3, USART_CR3_DMAT);
  1469.  
  1470.   /* Process Unlocked */
  1471.   __HAL_UNLOCK(husart);
  1472.  
  1473.   return HAL_OK;
  1474. }
  1475.  
  1476. /**
  1477.   * @brief  Resumes the DMA Transfer.
  1478.   * @param  husart Pointer to a USART_HandleTypeDef structure that contains
  1479.   *                the configuration information for the specified USART module.
  1480.   * @retval HAL status
  1481.   */
  1482. HAL_StatusTypeDef HAL_USART_DMAResume(USART_HandleTypeDef *husart)
  1483. {
  1484.   /* Process Locked */
  1485.   __HAL_LOCK(husart);
  1486.  
  1487.   /* Enable the USART DMA Tx request */
  1488.   SET_BIT(husart->Instance->CR3, USART_CR3_DMAT);
  1489.  
  1490.   /* Process Unlocked */
  1491.   __HAL_UNLOCK(husart);
  1492.  
  1493.   return HAL_OK;
  1494. }
  1495.  
  1496. /**
  1497.   * @brief  Stops the DMA Transfer.
  1498.   * @param  husart Pointer to a USART_HandleTypeDef structure that contains
  1499.   *                the configuration information for the specified USART module.
  1500.   * @retval HAL status
  1501.   */
  1502. HAL_StatusTypeDef HAL_USART_DMAStop(USART_HandleTypeDef *husart)
  1503. {
  1504.   uint32_t dmarequest = 0x00U;
  1505.   /* The Lock is not implemented on this API to allow the user application
  1506.      to call the HAL USART API under callbacks HAL_USART_TxCpltCallback() / HAL_USART_RxCpltCallback():
  1507.      when calling HAL_DMA_Abort() API the DMA TX/RX Transfer complete interrupt is generated
  1508.      and the correspond call back is executed HAL_USART_TxCpltCallback() / HAL_USART_RxCpltCallback()
  1509.      */
  1510.  
  1511.   /* Stop USART DMA Tx request if ongoing */
  1512.   dmarequest = HAL_IS_BIT_SET(husart->Instance->CR3, USART_CR3_DMAT);
  1513.   if ((husart->State == HAL_USART_STATE_BUSY_TX) && dmarequest)
  1514.   {
  1515.     USART_EndTxTransfer(husart);
  1516.  
  1517.     /* Abort the USART DMA Tx channel */
  1518.     if (husart->hdmatx != NULL)
  1519.     {
  1520.       HAL_DMA_Abort(husart->hdmatx);
  1521.     }
  1522.  
  1523.     /* Disable the USART Tx DMA request */
  1524.     CLEAR_BIT(husart->Instance->CR3, USART_CR3_DMAT);
  1525.   }
  1526.  
  1527.   /* Stop USART DMA Rx request if ongoing */
  1528.   dmarequest = HAL_IS_BIT_SET(husart->Instance->CR3, USART_CR3_DMAR);
  1529.   if ((husart->State == HAL_USART_STATE_BUSY_RX) && dmarequest)
  1530.   {
  1531.     USART_EndRxTransfer(husart);
  1532.  
  1533.     /* Abort the USART DMA Rx channel */
  1534.     if (husart->hdmarx != NULL)
  1535.     {
  1536.       HAL_DMA_Abort(husart->hdmarx);
  1537.     }
  1538.  
  1539.     /* Disable the USART Rx DMA request */
  1540.     CLEAR_BIT(husart->Instance->CR3, USART_CR3_DMAR);
  1541.   }
  1542.  
  1543.   return HAL_OK;
  1544. }
  1545.  
  1546. /**
  1547.   * @brief  Abort ongoing transfer (blocking mode).
  1548.   * @param  husart USART handle.
  1549.   * @note   This procedure could be used for aborting any ongoing transfer (either Tx or Rx,
  1550.   *         as described by TransferType parameter) started in Interrupt or DMA mode.
  1551.   *         This procedure performs following operations :
  1552.   *           - Disable PPP Interrupts (depending of transfer direction)
  1553.   *           - Disable the DMA transfer in the peripheral register (if enabled)
  1554.   *           - Abort DMA transfer by calling HAL_DMA_Abort (in case of transfer in DMA mode)
  1555.   *           - Set handle State to READY
  1556.   * @note   This procedure is executed in blocking mode : when exiting function, Abort is considered as completed.
  1557.   * @retval HAL status
  1558. */
  1559. HAL_StatusTypeDef HAL_USART_Abort(USART_HandleTypeDef *husart)
  1560. {
  1561.   /* Disable TXEIE, TCIE, RXNE, PE and ERR (Frame error, noise error, overrun error) interrupts */
  1562.   CLEAR_BIT(husart->Instance->CR1, (USART_CR1_RXNEIE | USART_CR1_PEIE | USART_CR1_TXEIE | USART_CR1_TCIE));
  1563.   CLEAR_BIT(husart->Instance->CR3, USART_CR3_EIE);
  1564.  
  1565.   /* Disable the USART DMA Tx request if enabled */
  1566.   if (HAL_IS_BIT_SET(husart->Instance->CR3, USART_CR3_DMAT))
  1567.   {
  1568.     CLEAR_BIT(husart->Instance->CR3, USART_CR3_DMAT);
  1569.  
  1570.     /* Abort the USART DMA Tx channel : use blocking DMA Abort API (no callback) */
  1571.     if (husart->hdmatx != NULL)
  1572.     {
  1573.       /* Set the USART DMA Abort callback to Null.
  1574.          No call back execution at end of DMA abort procedure */
  1575.       husart->hdmatx->XferAbortCallback = NULL;
  1576.  
  1577.       HAL_DMA_Abort(husart->hdmatx);
  1578.     }
  1579.   }
  1580.  
  1581.   /* Disable the USART DMA Rx request if enabled */
  1582.   if (HAL_IS_BIT_SET(husart->Instance->CR3, USART_CR3_DMAR))
  1583.   {
  1584.     CLEAR_BIT(husart->Instance->CR3, USART_CR3_DMAR);
  1585.  
  1586.     /* Abort the USART DMA Rx channel : use blocking DMA Abort API (no callback) */
  1587.     if (husart->hdmarx != NULL)
  1588.     {
  1589.       /* Set the USART DMA Abort callback to Null.
  1590.          No call back execution at end of DMA abort procedure */
  1591.       husart->hdmarx->XferAbortCallback = NULL;
  1592.  
  1593.       HAL_DMA_Abort(husart->hdmarx);
  1594.     }
  1595.   }
  1596.  
  1597.   /* Reset Tx and Rx transfer counters */
  1598.   husart->TxXferCount = 0x00U;
  1599.   husart->RxXferCount = 0x00U;
  1600.  
  1601.   /* Restore husart->State to Ready */
  1602.   husart->State  = HAL_USART_STATE_READY;
  1603.  
  1604.   /* Reset Handle ErrorCode to No Error */
  1605.   husart->ErrorCode = HAL_USART_ERROR_NONE;
  1606.  
  1607.   return HAL_OK;
  1608. }
  1609.  
  1610. /**
  1611.   * @brief  Abort ongoing transfer (Interrupt mode).
  1612.   * @param  husart USART handle.
  1613.   * @note   This procedure could be used for aborting any ongoing transfer (either Tx or Rx,
  1614.   *         as described by TransferType parameter) started in Interrupt or DMA mode.
  1615.   *         This procedure performs following operations :
  1616.   *           - Disable PPP Interrupts (depending of transfer direction)
  1617.   *           - Disable the DMA transfer in the peripheral register (if enabled)
  1618.   *           - Abort DMA transfer by calling HAL_DMA_Abort_IT (in case of transfer in DMA mode)
  1619.   *           - Set handle State to READY
  1620.   *           - At abort completion, call user abort complete callback
  1621.   * @note   This procedure is executed in Interrupt mode, meaning that abort procedure could be
  1622.   *         considered as completed only when user abort complete callback is executed (not when exiting function).
  1623.   * @retval HAL status
  1624. */
  1625. HAL_StatusTypeDef HAL_USART_Abort_IT(USART_HandleTypeDef *husart)
  1626. {
  1627.   uint32_t AbortCplt = 0x01U;
  1628.  
  1629.   /* Disable TXEIE, TCIE, RXNE, PE and ERR (Frame error, noise error, overrun error) interrupts */
  1630.   CLEAR_BIT(husart->Instance->CR1, (USART_CR1_RXNEIE | USART_CR1_PEIE | USART_CR1_TXEIE | USART_CR1_TCIE));
  1631.   CLEAR_BIT(husart->Instance->CR3, USART_CR3_EIE);
  1632.  
  1633.   /* If DMA Tx and/or DMA Rx Handles are associated to USART Handle, DMA Abort complete callbacks should be initialised
  1634.      before any call to DMA Abort functions */
  1635.   /* DMA Tx Handle is valid */
  1636.   if (husart->hdmatx != NULL)
  1637.   {
  1638.     /* Set DMA Abort Complete callback if USART DMA Tx request if enabled.
  1639.        Otherwise, set it to NULL */
  1640.     if (HAL_IS_BIT_SET(husart->Instance->CR3, USART_CR3_DMAT))
  1641.     {
  1642.       husart->hdmatx->XferAbortCallback = USART_DMATxAbortCallback;
  1643.     }
  1644.     else
  1645.     {
  1646.       husart->hdmatx->XferAbortCallback = NULL;
  1647.     }
  1648.   }
  1649.   /* DMA Rx Handle is valid */
  1650.   if (husart->hdmarx != NULL)
  1651.   {
  1652.     /* Set DMA Abort Complete callback if USART DMA Rx request if enabled.
  1653.        Otherwise, set it to NULL */
  1654.     if (HAL_IS_BIT_SET(husart->Instance->CR3, USART_CR3_DMAR))
  1655.     {
  1656.       husart->hdmarx->XferAbortCallback = USART_DMARxAbortCallback;
  1657.     }
  1658.     else
  1659.     {
  1660.       husart->hdmarx->XferAbortCallback = NULL;
  1661.     }
  1662.   }
  1663.  
  1664.   /* Disable the USART DMA Tx request if enabled */
  1665.   if (HAL_IS_BIT_SET(husart->Instance->CR3, USART_CR3_DMAT))
  1666.   {
  1667.     /* Disable DMA Tx at USART level */
  1668.     CLEAR_BIT(husart->Instance->CR3, USART_CR3_DMAT);
  1669.  
  1670.     /* Abort the USART DMA Tx channel : use non blocking DMA Abort API (callback) */
  1671.     if (husart->hdmatx != NULL)
  1672.     {
  1673.       /* USART Tx DMA Abort callback has already been initialised :
  1674.          will lead to call HAL_USART_AbortCpltCallback() at end of DMA abort procedure */
  1675.  
  1676.       /* Abort DMA TX */
  1677.       if (HAL_DMA_Abort_IT(husart->hdmatx) != HAL_OK)
  1678.       {
  1679.         husart->hdmatx->XferAbortCallback = NULL;
  1680.       }
  1681.       else
  1682.       {
  1683.         AbortCplt = 0x00U;
  1684.       }
  1685.     }
  1686.   }
  1687.  
  1688.   /* Disable the USART DMA Rx request if enabled */
  1689.   if (HAL_IS_BIT_SET(husart->Instance->CR3, USART_CR3_DMAR))
  1690.   {
  1691.     CLEAR_BIT(husart->Instance->CR3, USART_CR3_DMAR);
  1692.  
  1693.     /* Abort the USART DMA Rx channel : use non blocking DMA Abort API (callback) */
  1694.     if (husart->hdmarx != NULL)
  1695.     {
  1696.       /* USART Rx DMA Abort callback has already been initialised :
  1697.          will lead to call HAL_USART_AbortCpltCallback() at end of DMA abort procedure */
  1698.  
  1699.       /* Abort DMA RX */
  1700.       if (HAL_DMA_Abort_IT(husart->hdmarx) != HAL_OK)
  1701.       {
  1702.         husart->hdmarx->XferAbortCallback = NULL;
  1703.         AbortCplt = 0x01U;
  1704.       }
  1705.       else
  1706.       {
  1707.         AbortCplt = 0x00U;
  1708.       }
  1709.     }
  1710.   }
  1711.  
  1712.   /* if no DMA abort complete callback execution is required => call user Abort Complete callback */
  1713.   if (AbortCplt  == 0x01U)
  1714.   {
  1715.     /* Reset Tx and Rx transfer counters */
  1716.     husart->TxXferCount = 0x00U;
  1717.     husart->RxXferCount = 0x00U;
  1718.  
  1719.     /* Reset errorCode */
  1720.     husart->ErrorCode = HAL_USART_ERROR_NONE;
  1721.  
  1722.     /* Restore husart->State to Ready */
  1723.     husart->State  = HAL_USART_STATE_READY;
  1724.  
  1725.     /* As no DMA to be aborted, call directly user Abort complete callback */
  1726. #if (USE_HAL_USART_REGISTER_CALLBACKS == 1)
  1727.     /* Call registered Abort Complete Callback */
  1728.     husart->AbortCpltCallback(husart);
  1729. #else
  1730.     /* Call legacy weak Abort Complete Callback */
  1731.     HAL_USART_AbortCpltCallback(husart);
  1732. #endif /* USE_HAL_USART_REGISTER_CALLBACKS */
  1733.   }
  1734.  
  1735.   return HAL_OK;
  1736. }
  1737.  
  1738. /**
  1739.   * @brief  This function handles USART interrupt request.
  1740.   * @param  husart Pointer to a USART_HandleTypeDef structure that contains
  1741.   *                the configuration information for the specified USART module.
  1742.   * @retval None
  1743.   */
  1744. void HAL_USART_IRQHandler(USART_HandleTypeDef *husart)
  1745. {
  1746.   uint32_t isrflags = READ_REG(husart->Instance->SR);
  1747.   uint32_t cr1its   = READ_REG(husart->Instance->CR1);
  1748.   uint32_t cr3its   = READ_REG(husart->Instance->CR3);
  1749.   uint32_t errorflags = 0x00U;
  1750.   uint32_t dmarequest = 0x00U;
  1751.  
  1752.   /* If no error occurs */
  1753.   errorflags = (isrflags & (uint32_t)(USART_SR_PE | USART_SR_FE | USART_SR_ORE | USART_SR_NE));
  1754.   if (errorflags == RESET)
  1755.   {
  1756.     /* USART in mode Receiver -------------------------------------------------*/
  1757.     if (((isrflags & USART_SR_RXNE) != RESET) && ((cr1its & USART_CR1_RXNEIE) != RESET))
  1758.     {
  1759.       if (husart->State == HAL_USART_STATE_BUSY_RX)
  1760.       {
  1761.         USART_Receive_IT(husart);
  1762.       }
  1763.       else
  1764.       {
  1765.         USART_TransmitReceive_IT(husart);
  1766.       }
  1767.       return;
  1768.     }
  1769.   }
  1770.   /* If some errors occur */
  1771.   if ((errorflags != RESET) && (((cr3its & USART_CR3_EIE) != RESET) || ((cr1its & (USART_CR1_RXNEIE | USART_CR1_PEIE)) != RESET)))
  1772.   {
  1773.     /* USART parity error interrupt occurred ----------------------------------*/
  1774.     if (((isrflags & USART_SR_PE) != RESET) && ((cr1its & USART_CR1_PEIE) != RESET))
  1775.     {
  1776.       husart->ErrorCode |= HAL_USART_ERROR_PE;
  1777.     }
  1778.  
  1779.     /* USART noise error interrupt occurred --------------------------------*/
  1780.     if (((isrflags & USART_SR_NE) != RESET) && ((cr3its & USART_CR3_EIE) != RESET))
  1781.     {
  1782.       husart->ErrorCode |= HAL_USART_ERROR_NE;
  1783.     }
  1784.  
  1785.     /* USART frame error interrupt occurred --------------------------------*/
  1786.     if (((isrflags & USART_SR_FE) != RESET) && ((cr3its & USART_CR3_EIE) != RESET))
  1787.     {
  1788.       husart->ErrorCode |= HAL_USART_ERROR_FE;
  1789.     }
  1790.  
  1791.     /* USART Over-Run interrupt occurred -----------------------------------*/
  1792.     if (((isrflags & USART_SR_ORE) != RESET) && ((cr3its & USART_CR3_EIE) != RESET))
  1793.     {
  1794.       husart->ErrorCode |= HAL_USART_ERROR_ORE;
  1795.     }
  1796.  
  1797.     if (husart->ErrorCode != HAL_USART_ERROR_NONE)
  1798.     {
  1799.       /* USART in mode Receiver -----------------------------------------------*/
  1800.       if (((isrflags & USART_SR_RXNE) != RESET) && ((cr1its & USART_CR1_RXNEIE) != RESET))
  1801.       {
  1802.         if (husart->State == HAL_USART_STATE_BUSY_RX)
  1803.         {
  1804.           USART_Receive_IT(husart);
  1805.         }
  1806.         else
  1807.         {
  1808.           USART_TransmitReceive_IT(husart);
  1809.         }
  1810.       }
  1811.       /* If Overrun error occurs, or if any error occurs in DMA mode reception,
  1812.       consider error as blocking */
  1813.       dmarequest = HAL_IS_BIT_SET(husart->Instance->CR3, USART_CR3_DMAR);
  1814.       if (((husart->ErrorCode & HAL_USART_ERROR_ORE) != RESET) || dmarequest)
  1815.       {
  1816.         /* Set the USART state ready to be able to start again the process,
  1817.         Disable Rx Interrupts, and disable Rx DMA request, if ongoing */
  1818.         USART_EndRxTransfer(husart);
  1819.  
  1820.         /* Disable the USART DMA Rx request if enabled */
  1821.         if (HAL_IS_BIT_SET(husart->Instance->CR3, USART_CR3_DMAR))
  1822.         {
  1823.           CLEAR_BIT(husart->Instance->CR3, USART_CR3_DMAR);
  1824.  
  1825.           /* Abort the USART DMA Rx channel */
  1826.           if (husart->hdmarx != NULL)
  1827.           {
  1828.             /* Set the USART DMA Abort callback :
  1829.             will lead to call HAL_USART_ErrorCallback() at end of DMA abort procedure */
  1830.             husart->hdmarx->XferAbortCallback = USART_DMAAbortOnError;
  1831.  
  1832.             if (HAL_DMA_Abort_IT(husart->hdmarx) != HAL_OK)
  1833.             {
  1834.               /* Call Directly XferAbortCallback function in case of error */
  1835.               husart->hdmarx->XferAbortCallback(husart->hdmarx);
  1836.             }
  1837.           }
  1838.           else
  1839.           {
  1840.             /* Call user error callback */
  1841. #if (USE_HAL_USART_REGISTER_CALLBACKS == 1)
  1842.             /* Call registered Error Callback */
  1843.             husart->ErrorCallback(husart);
  1844. #else
  1845.             /* Call legacy weak Error Callback */
  1846.             HAL_USART_ErrorCallback(husart);
  1847. #endif /* USE_HAL_USART_REGISTER_CALLBACKS */
  1848.           }
  1849.         }
  1850.         else
  1851.         {
  1852.           /* Call user error callback */
  1853. #if (USE_HAL_USART_REGISTER_CALLBACKS == 1)
  1854.           /* Call registered Error Callback */
  1855.           husart->ErrorCallback(husart);
  1856. #else
  1857.           /* Call legacy weak Error Callback */
  1858.           HAL_USART_ErrorCallback(husart);
  1859. #endif /* USE_HAL_USART_REGISTER_CALLBACKS */
  1860.         }
  1861.       }
  1862.       else
  1863.       {
  1864.         /* Call user error callback */
  1865. #if (USE_HAL_USART_REGISTER_CALLBACKS == 1)
  1866.         /* Call registered Error Callback */
  1867.         husart->ErrorCallback(husart);
  1868. #else
  1869.         /* Call legacy weak Error Callback */
  1870.         HAL_USART_ErrorCallback(husart);
  1871. #endif /* USE_HAL_USART_REGISTER_CALLBACKS */
  1872.         husart->ErrorCode = HAL_USART_ERROR_NONE;
  1873.       }
  1874.     }
  1875.     return;
  1876.   }
  1877.  
  1878.   /* USART in mode Transmitter -----------------------------------------------*/
  1879.   if (((isrflags & USART_SR_TXE) != RESET) && ((cr1its & USART_CR1_TXEIE) != RESET))
  1880.   {
  1881.     if (husart->State == HAL_USART_STATE_BUSY_TX)
  1882.     {
  1883.       USART_Transmit_IT(husart);
  1884.     }
  1885.     else
  1886.     {
  1887.       USART_TransmitReceive_IT(husart);
  1888.     }
  1889.     return;
  1890.   }
  1891.  
  1892.   /* USART in mode Transmitter (transmission end) ----------------------------*/
  1893.   if (((isrflags & USART_SR_TC) != RESET) && ((cr1its & USART_CR1_TCIE) != RESET))
  1894.   {
  1895.     USART_EndTransmit_IT(husart);
  1896.     return;
  1897.   }
  1898. }
  1899.  
  1900. /**
  1901.   * @brief  Tx Transfer completed callbacks.
  1902.   * @param  husart Pointer to a USART_HandleTypeDef structure that contains
  1903.   *                the configuration information for the specified USART module.
  1904.   * @retval None
  1905.   */
  1906. __weak void HAL_USART_TxCpltCallback(USART_HandleTypeDef *husart)
  1907. {
  1908.   /* Prevent unused argument(s) compilation warning */
  1909.   UNUSED(husart);
  1910.   /* NOTE: This function should not be modified, when the callback is needed,
  1911.            the HAL_USART_TxCpltCallback could be implemented in the user file
  1912.    */
  1913. }
  1914.  
  1915. /**
  1916.   * @brief  Tx Half Transfer completed callbacks.
  1917.   * @param  husart Pointer to a USART_HandleTypeDef structure that contains
  1918.   *                the configuration information for the specified USART module.
  1919.   * @retval None
  1920.   */
  1921. __weak void HAL_USART_TxHalfCpltCallback(USART_HandleTypeDef *husart)
  1922. {
  1923.   /* Prevent unused argument(s) compilation warning */
  1924.   UNUSED(husart);
  1925.   /* NOTE: This function should not be modified, when the callback is needed,
  1926.            the HAL_USART_TxHalfCpltCallback could be implemented in the user file
  1927.    */
  1928. }
  1929.  
  1930. /**
  1931.   * @brief  Rx Transfer completed callbacks.
  1932.   * @param  husart Pointer to a USART_HandleTypeDef structure that contains
  1933.   *                the configuration information for the specified USART module.
  1934.   * @retval None
  1935.   */
  1936. __weak void HAL_USART_RxCpltCallback(USART_HandleTypeDef *husart)
  1937. {
  1938.   /* Prevent unused argument(s) compilation warning */
  1939.   UNUSED(husart);
  1940.   /* NOTE: This function should not be modified, when the callback is needed,
  1941.            the HAL_USART_RxCpltCallback could be implemented in the user file
  1942.    */
  1943. }
  1944.  
  1945. /**
  1946.   * @brief  Rx Half Transfer completed callbacks.
  1947.   * @param  husart Pointer to a USART_HandleTypeDef structure that contains
  1948.   *                the configuration information for the specified USART module.
  1949.   * @retval None
  1950.   */
  1951. __weak void HAL_USART_RxHalfCpltCallback(USART_HandleTypeDef *husart)
  1952. {
  1953.   /* Prevent unused argument(s) compilation warning */
  1954.   UNUSED(husart);
  1955.   /* NOTE: This function should not be modified, when the callback is needed,
  1956.            the HAL_USART_RxHalfCpltCallback could be implemented in the user file
  1957.    */
  1958. }
  1959.  
  1960. /**
  1961.   * @brief  Tx/Rx Transfers completed callback for the non-blocking process.
  1962.   * @param  husart Pointer to a USART_HandleTypeDef structure that contains
  1963.   *                the configuration information for the specified USART module.
  1964.   * @retval None
  1965.   */
  1966. __weak void HAL_USART_TxRxCpltCallback(USART_HandleTypeDef *husart)
  1967. {
  1968.   /* Prevent unused argument(s) compilation warning */
  1969.   UNUSED(husart);
  1970.   /* NOTE: This function should not be modified, when the callback is needed,
  1971.            the HAL_USART_TxRxCpltCallback could be implemented in the user file
  1972.    */
  1973. }
  1974.  
  1975. /**
  1976.   * @brief  USART error callbacks.
  1977.   * @param  husart Pointer to a USART_HandleTypeDef structure that contains
  1978.   *                the configuration information for the specified USART module.
  1979.   * @retval None
  1980.   */
  1981. __weak void HAL_USART_ErrorCallback(USART_HandleTypeDef *husart)
  1982. {
  1983.   /* Prevent unused argument(s) compilation warning */
  1984.   UNUSED(husart);
  1985.   /* NOTE: This function should not be modified, when the callback is needed,
  1986.            the HAL_USART_ErrorCallback could be implemented in the user file
  1987.    */
  1988. }
  1989.  
  1990. /**
  1991.   * @brief  USART Abort Complete callback.
  1992.   * @param  husart USART handle.
  1993.   * @retval None
  1994.   */
  1995. __weak void HAL_USART_AbortCpltCallback(USART_HandleTypeDef *husart)
  1996. {
  1997.   /* Prevent unused argument(s) compilation warning */
  1998.   UNUSED(husart);
  1999.  
  2000.   /* NOTE : This function should not be modified, when the callback is needed,
  2001.             the HAL_USART_AbortCpltCallback can be implemented in the user file.
  2002.    */
  2003. }
  2004.  
  2005. /**
  2006.   * @}
  2007.   */
  2008.  
  2009. /** @defgroup USART_Exported_Functions_Group3 Peripheral State and Errors functions
  2010.   *  @brief   USART State and Errors functions
  2011.   *
  2012. @verbatim
  2013.   ==============================================================================
  2014.                   ##### Peripheral State and Errors functions #####
  2015.   ==============================================================================
  2016.   [..]
  2017.     This subsection provides a set of functions allowing to return the State of
  2018.     USART communication
  2019.     process, return Peripheral Errors occurred during communication process
  2020.      (+) HAL_USART_GetState() API can be helpful to check in run-time the state
  2021.          of the USART peripheral.
  2022.      (+) HAL_USART_GetError() check in run-time errors that could be occurred during
  2023.          communication.
  2024. @endverbatim
  2025.   * @{
  2026.   */
  2027.  
  2028. /**
  2029.   * @brief  Returns the USART state.
  2030.   * @param  husart Pointer to a USART_HandleTypeDef structure that contains
  2031.   *                the configuration information for the specified USART module.
  2032.   * @retval HAL state
  2033.   */
  2034. HAL_USART_StateTypeDef HAL_USART_GetState(USART_HandleTypeDef *husart)
  2035. {
  2036.   return husart->State;
  2037. }
  2038.  
  2039. /**
  2040.   * @brief  Return the USART error code
  2041.   * @param  husart Pointer to a USART_HandleTypeDef structure that contains
  2042.   *                the configuration information for the specified USART.
  2043.   * @retval USART Error Code
  2044.   */
  2045. uint32_t HAL_USART_GetError(USART_HandleTypeDef *husart)
  2046. {
  2047.   return husart->ErrorCode;
  2048. }
  2049.  
  2050. /**
  2051.   * @}
  2052.   */
  2053.  
  2054. /** @defgroup USART_Private_Functions USART Private Functions
  2055.  * @{
  2056.  */
  2057.  
  2058. /**
  2059.   * @brief  Initialize the callbacks to their default values.
  2060.   * @param  husart USART handle.
  2061.   * @retval none
  2062.   */
  2063. #if (USE_HAL_USART_REGISTER_CALLBACKS == 1)
  2064. void USART_InitCallbacksToDefault(USART_HandleTypeDef *husart)
  2065. {
  2066.   /* Init the USART Callback settings */
  2067.   husart->TxHalfCpltCallback        = HAL_USART_TxHalfCpltCallback;        /* Legacy weak TxHalfCpltCallback        */
  2068.   husart->TxCpltCallback            = HAL_USART_TxCpltCallback;            /* Legacy weak TxCpltCallback            */
  2069.   husart->RxHalfCpltCallback        = HAL_USART_RxHalfCpltCallback;        /* Legacy weak RxHalfCpltCallback        */
  2070.   husart->RxCpltCallback            = HAL_USART_RxCpltCallback;            /* Legacy weak RxCpltCallback            */
  2071.   husart->TxRxCpltCallback          = HAL_USART_TxRxCpltCallback;          /* Legacy weak TxRxCpltCallback          */
  2072.   husart->ErrorCallback             = HAL_USART_ErrorCallback;             /* Legacy weak ErrorCallback             */
  2073.   husart->AbortCpltCallback         = HAL_USART_AbortCpltCallback;         /* Legacy weak AbortCpltCallback         */
  2074. }
  2075. #endif /* USE_HAL_USART_REGISTER_CALLBACKS */
  2076.  
  2077. /**
  2078.   * @brief  DMA USART transmit process complete callback.
  2079.   * @param  hdma Pointer to a DMA_HandleTypeDef structure that contains
  2080.   *              the configuration information for the specified DMA module.
  2081.   * @retval None
  2082.   */
  2083. static void USART_DMATransmitCplt(DMA_HandleTypeDef *hdma)
  2084. {
  2085.   USART_HandleTypeDef *husart = (USART_HandleTypeDef *)((DMA_HandleTypeDef *)hdma)->Parent;
  2086.   /* DMA Normal mode */
  2087.   if ((hdma->Instance->CCR & DMA_CCR_CIRC) == 0U)
  2088.   {
  2089.     husart->TxXferCount = 0U;
  2090.     if (husart->State == HAL_USART_STATE_BUSY_TX)
  2091.     {
  2092.       /* Disable the DMA transfer for transmit request by resetting the DMAT bit
  2093.          in the USART CR3 register */
  2094.       CLEAR_BIT(husart->Instance->CR3, USART_CR3_DMAT);
  2095.  
  2096.       /* Enable the USART Transmit Complete Interrupt */
  2097.       SET_BIT(husart->Instance->CR1, USART_CR1_TCIE);
  2098.     }
  2099.   }
  2100.   /* DMA Circular mode */
  2101.   else
  2102.   {
  2103.     if (husart->State == HAL_USART_STATE_BUSY_TX)
  2104.     {
  2105. #if (USE_HAL_USART_REGISTER_CALLBACKS == 1)
  2106.       /* Call registered Tx Complete Callback */
  2107.       husart->TxCpltCallback(husart);
  2108. #else
  2109.       /* Call legacy weak Tx Complete Callback */
  2110.       HAL_USART_TxCpltCallback(husart);
  2111. #endif /* USE_HAL_USART_REGISTER_CALLBACKS */
  2112.     }
  2113.   }
  2114. }
  2115.  
  2116. /**
  2117.   * @brief  DMA USART transmit process half complete callback
  2118.   * @param  hdma Pointer to a DMA_HandleTypeDef structure that contains
  2119.   *              the configuration information for the specified DMA module.
  2120.   * @retval None
  2121.   */
  2122. static void USART_DMATxHalfCplt(DMA_HandleTypeDef *hdma)
  2123. {
  2124.   USART_HandleTypeDef *husart = (USART_HandleTypeDef *)((DMA_HandleTypeDef *)hdma)->Parent;
  2125.  
  2126. #if (USE_HAL_USART_REGISTER_CALLBACKS == 1)
  2127.   /* Call registered Tx Half Complete Callback */
  2128.   husart->TxHalfCpltCallback(husart);
  2129. #else
  2130.   /* Call legacy weak Tx Half Complete Callback */
  2131.   HAL_USART_TxHalfCpltCallback(husart);
  2132. #endif /* USE_HAL_USART_REGISTER_CALLBACKS */
  2133. }
  2134.  
  2135. /**
  2136.   * @brief  DMA USART receive process complete callback.
  2137.   * @param  hdma Pointer to a DMA_HandleTypeDef structure that contains
  2138.   *              the configuration information for the specified DMA module.
  2139.   * @retval None
  2140.   */
  2141. static void USART_DMAReceiveCplt(DMA_HandleTypeDef *hdma)
  2142. {
  2143.   USART_HandleTypeDef *husart = (USART_HandleTypeDef *)((DMA_HandleTypeDef *)hdma)->Parent;
  2144.   /* DMA Normal mode */
  2145.   if ((hdma->Instance->CCR & DMA_CCR_CIRC) == 0U)
  2146.   {
  2147.     husart->RxXferCount = 0x00U;
  2148.  
  2149.     /* Disable RXNE, PE and ERR (Frame error, noise error, overrun error) interrupts */
  2150.     CLEAR_BIT(husart->Instance->CR1, USART_CR1_PEIE);
  2151.     CLEAR_BIT(husart->Instance->CR3, USART_CR3_EIE);
  2152.  
  2153.     /* Disable the DMA transfer for the Transmit/receiver request by clearing the DMAT/DMAR bit
  2154.          in the USART CR3 register */
  2155.     CLEAR_BIT(husart->Instance->CR3, USART_CR3_DMAR);
  2156.     CLEAR_BIT(husart->Instance->CR3, USART_CR3_DMAT);
  2157.  
  2158.     husart->State = HAL_USART_STATE_READY;
  2159.  
  2160.     /* The USART state is HAL_USART_STATE_BUSY_RX */
  2161.     if (husart->State == HAL_USART_STATE_BUSY_RX)
  2162.     {
  2163. #if (USE_HAL_USART_REGISTER_CALLBACKS == 1)
  2164.       /* Call registered Rx Complete Callback */
  2165.       husart->RxCpltCallback(husart);
  2166. #else
  2167.       /* Call legacy weak Rx Complete Callback */
  2168.       HAL_USART_RxCpltCallback(husart);
  2169. #endif /* USE_HAL_USART_REGISTER_CALLBACKS */
  2170.     }
  2171.     /* The USART state is HAL_USART_STATE_BUSY_TX_RX */
  2172.     else
  2173.     {
  2174. #if (USE_HAL_USART_REGISTER_CALLBACKS == 1)
  2175.       /* Call registered Tx Rx Complete Callback */
  2176.       husart->TxRxCpltCallback(husart);
  2177. #else
  2178.       /* Call legacy weak Tx Rx Complete Callback */
  2179.       HAL_USART_TxRxCpltCallback(husart);
  2180. #endif /* USE_HAL_USART_REGISTER_CALLBACKS */
  2181.     }
  2182.   }
  2183.   /* DMA circular mode */
  2184.   else
  2185.   {
  2186.     if (husart->State == HAL_USART_STATE_BUSY_RX)
  2187.     {
  2188. #if (USE_HAL_USART_REGISTER_CALLBACKS == 1)
  2189.       /* Call registered Rx Complete Callback */
  2190.       husart->RxCpltCallback(husart);
  2191. #else
  2192.       /* Call legacy weak Rx Complete Callback */
  2193.       HAL_USART_RxCpltCallback(husart);
  2194. #endif /* USE_HAL_USART_REGISTER_CALLBACKS */
  2195.     }
  2196.     /* The USART state is HAL_USART_STATE_BUSY_TX_RX */
  2197.     else
  2198.     {
  2199. #if (USE_HAL_USART_REGISTER_CALLBACKS == 1)
  2200.       /* Call registered Tx Rx Complete Callback */
  2201.       husart->TxRxCpltCallback(husart);
  2202. #else
  2203.       /* Call legacy weak Tx Rx Complete Callback */
  2204.       HAL_USART_TxRxCpltCallback(husart);
  2205. #endif /* USE_HAL_USART_REGISTER_CALLBACKS */
  2206.     }
  2207.   }
  2208. }
  2209.  
  2210. /**
  2211.   * @brief  DMA USART receive process half complete callback
  2212.   * @param  hdma Pointer to a DMA_HandleTypeDef structure that contains
  2213.   *              the configuration information for the specified DMA module.
  2214.   * @retval None
  2215.   */
  2216. static void USART_DMARxHalfCplt(DMA_HandleTypeDef *hdma)
  2217. {
  2218.   USART_HandleTypeDef *husart = (USART_HandleTypeDef *)((DMA_HandleTypeDef *)hdma)->Parent;
  2219.  
  2220. #if (USE_HAL_USART_REGISTER_CALLBACKS == 1)
  2221.   /* Call registered Rx Half Complete Callback */
  2222.   husart->RxHalfCpltCallback(husart);
  2223. #else
  2224.   /* Call legacy weak Rx Half Complete Callback */
  2225.   HAL_USART_RxHalfCpltCallback(husart);
  2226. #endif /* USE_HAL_USART_REGISTER_CALLBACKS */
  2227. }
  2228.  
  2229. /**
  2230.   * @brief  DMA USART communication error callback.
  2231.   * @param  hdma Pointer to a DMA_HandleTypeDef structure that contains
  2232.   *              the configuration information for the specified DMA module.
  2233.   * @retval None
  2234.   */
  2235. static void USART_DMAError(DMA_HandleTypeDef *hdma)
  2236. {
  2237.   uint32_t dmarequest = 0x00U;
  2238.   USART_HandleTypeDef *husart = (USART_HandleTypeDef *)((DMA_HandleTypeDef *)hdma)->Parent;
  2239.   husart->RxXferCount = 0x00U;
  2240.   husart->TxXferCount = 0x00U;
  2241.  
  2242.   /* Stop USART DMA Tx request if ongoing */
  2243.   dmarequest = HAL_IS_BIT_SET(husart->Instance->CR3, USART_CR3_DMAT);
  2244.   if ((husart->State == HAL_USART_STATE_BUSY_TX) && dmarequest)
  2245.   {
  2246.     USART_EndTxTransfer(husart);
  2247.   }
  2248.  
  2249.   /* Stop USART DMA Rx request if ongoing */
  2250.   dmarequest = HAL_IS_BIT_SET(husart->Instance->CR3, USART_CR3_DMAR);
  2251.   if ((husart->State == HAL_USART_STATE_BUSY_RX) && dmarequest)
  2252.   {
  2253.     USART_EndRxTransfer(husart);
  2254.   }
  2255.  
  2256.   husart->ErrorCode |= HAL_USART_ERROR_DMA;
  2257.   husart->State = HAL_USART_STATE_READY;
  2258.  
  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. }
  2267.  
  2268. /**
  2269.   * @brief  This function handles USART Communication Timeout.
  2270.   * @param  husart Pointer to a USART_HandleTypeDef structure that contains
  2271.   *                the configuration information for the specified USART module.
  2272.   * @param  Flag specifies the USART flag to check.
  2273.   * @param  Status The new Flag status (SET or RESET).
  2274.   * @param  Tickstart Tick start value.
  2275.   * @param  Timeout Timeout duration.
  2276.   * @retval HAL status
  2277.   */
  2278. static HAL_StatusTypeDef USART_WaitOnFlagUntilTimeout(USART_HandleTypeDef *husart, uint32_t Flag, FlagStatus Status, uint32_t Tickstart, uint32_t Timeout)
  2279. {
  2280.   /* Wait until flag is set */
  2281.   while ((__HAL_USART_GET_FLAG(husart, Flag) ? SET : RESET) == Status)
  2282.   {
  2283.     /* Check for the Timeout */
  2284.     if (Timeout != HAL_MAX_DELAY)
  2285.     {
  2286.       if ((Timeout == 0U) || ((HAL_GetTick() - Tickstart) > Timeout))
  2287.       {
  2288.         /* Disable the USART Transmit Complete Interrupt */
  2289.         CLEAR_BIT(husart->Instance->CR1, USART_CR1_TXEIE);
  2290.  
  2291.         /* Disable the USART RXNE Interrupt */
  2292.         CLEAR_BIT(husart->Instance->CR1, USART_CR1_RXNEIE);
  2293.  
  2294.         /* Disable the USART Parity Error Interrupt */
  2295.         CLEAR_BIT(husart->Instance->CR1, USART_CR1_PEIE);
  2296.  
  2297.         /* Disable the USART Error Interrupt: (Frame error, noise error, overrun error) */
  2298.         CLEAR_BIT(husart->Instance->CR3, USART_CR3_EIE);
  2299.  
  2300.         husart->State = HAL_USART_STATE_READY;
  2301.  
  2302.         /* Process Unlocked */
  2303.         __HAL_UNLOCK(husart);
  2304.  
  2305.         return HAL_TIMEOUT;
  2306.       }
  2307.     }
  2308.   }
  2309.   return HAL_OK;
  2310. }
  2311.  
  2312. /**
  2313.   * @brief  End ongoing Tx transfer on USART peripheral (following error detection or Transmit completion).
  2314.   * @param  husart USART handle.
  2315.   * @retval None
  2316.   */
  2317. static void USART_EndTxTransfer(USART_HandleTypeDef *husart)
  2318. {
  2319.   /* Disable TXEIE and TCIE interrupts */
  2320.   CLEAR_BIT(husart->Instance->CR1, (USART_CR1_TXEIE | USART_CR1_TCIE));
  2321.  
  2322.   /* At end of Tx process, restore husart->State to Ready */
  2323.   husart->State = HAL_USART_STATE_READY;
  2324. }
  2325.  
  2326. /**
  2327.   * @brief  End ongoing Rx transfer on USART peripheral (following error detection or Reception completion).
  2328.   * @param  husart USART handle.
  2329.   * @retval None
  2330.   */
  2331. static void USART_EndRxTransfer(USART_HandleTypeDef *husart)
  2332. {
  2333.   /* Disable RXNE, PE and ERR interrupts */
  2334.   CLEAR_BIT(husart->Instance->CR1, (USART_CR1_RXNEIE | USART_CR1_PEIE));
  2335.   CLEAR_BIT(husart->Instance->CR3, USART_CR3_EIE);
  2336.  
  2337.   /* At end of Rx process, restore husart->State to Ready */
  2338.   husart->State = HAL_USART_STATE_READY;
  2339. }
  2340.  
  2341. /**
  2342.   * @brief  DMA USART communication abort callback, when initiated by HAL services on Error
  2343.   *         (To be called at end of DMA Abort procedure following error occurrence).
  2344.   * @param  hdma DMA handle.
  2345.   * @retval None
  2346.   */
  2347. static void USART_DMAAbortOnError(DMA_HandleTypeDef *hdma)
  2348. {
  2349.   USART_HandleTypeDef *husart = (USART_HandleTypeDef *)((DMA_HandleTypeDef *)hdma)->Parent;
  2350.   husart->RxXferCount = 0x00U;
  2351.   husart->TxXferCount = 0x00U;
  2352.  
  2353. #if (USE_HAL_USART_REGISTER_CALLBACKS == 1)
  2354.   /* Call registered Error Callback */
  2355.   husart->ErrorCallback(husart);
  2356. #else
  2357.   /* Call legacy weak Error Callback */
  2358.   HAL_USART_ErrorCallback(husart);
  2359. #endif /* USE_HAL_USART_REGISTER_CALLBACKS */
  2360. }
  2361.  
  2362. /**
  2363.   * @brief  DMA USART Tx communication abort callback, when initiated by user
  2364.   *         (To be called at end of DMA Tx Abort procedure following user abort request).
  2365.   * @note   When this callback is executed, User Abort complete call back is called only if no
  2366.   *         Abort still ongoing for Rx DMA Handle.
  2367.   * @param  hdma DMA handle.
  2368.   * @retval None
  2369.   */
  2370. static void USART_DMATxAbortCallback(DMA_HandleTypeDef *hdma)
  2371. {
  2372.   USART_HandleTypeDef *husart = (USART_HandleTypeDef *)((DMA_HandleTypeDef *)hdma)->Parent;
  2373.  
  2374.   husart->hdmatx->XferAbortCallback = NULL;
  2375.  
  2376.   /* Check if an Abort process is still ongoing */
  2377.   if (husart->hdmarx != NULL)
  2378.   {
  2379.     if (husart->hdmarx->XferAbortCallback != NULL)
  2380.     {
  2381.       return;
  2382.     }
  2383.   }
  2384.  
  2385.   /* No Abort process still ongoing : All DMA channels are aborted, call user Abort Complete callback */
  2386.   husart->TxXferCount = 0x00U;
  2387.   husart->RxXferCount = 0x00U;
  2388.  
  2389.   /* Reset errorCode */
  2390.   husart->ErrorCode = HAL_USART_ERROR_NONE;
  2391.  
  2392.   /* Restore husart->State to Ready */
  2393.   husart->State  = HAL_USART_STATE_READY;
  2394.  
  2395.   /* Call user Abort complete callback */
  2396. #if (USE_HAL_USART_REGISTER_CALLBACKS == 1)
  2397.   /* Call registered Abort Complete Callback */
  2398.   husart->AbortCpltCallback(husart);
  2399. #else
  2400.   /* Call legacy weak Abort Complete Callback */
  2401.   HAL_USART_AbortCpltCallback(husart);
  2402. #endif /* USE_HAL_USART_REGISTER_CALLBACKS */
  2403. }
  2404.  
  2405. /**
  2406.   * @brief  DMA USART Rx communication abort callback, when initiated by user
  2407.   *         (To be called at end of DMA Rx Abort procedure following user abort request).
  2408.   * @note   When this callback is executed, User Abort complete call back is called only if no
  2409.   *         Abort still ongoing for Tx DMA Handle.
  2410.   * @param  hdma DMA handle.
  2411.   * @retval None
  2412.   */
  2413. static void USART_DMARxAbortCallback(DMA_HandleTypeDef *hdma)
  2414. {
  2415.   USART_HandleTypeDef *husart = (USART_HandleTypeDef *)((DMA_HandleTypeDef *)hdma)->Parent;
  2416.  
  2417.   husart->hdmarx->XferAbortCallback = NULL;
  2418.  
  2419.   /* Check if an Abort process is still ongoing */
  2420.   if (husart->hdmatx != NULL)
  2421.   {
  2422.     if (husart->hdmatx->XferAbortCallback != NULL)
  2423.     {
  2424.       return;
  2425.     }
  2426.   }
  2427.  
  2428.   /* No Abort process still ongoing : All DMA channels are aborted, call user Abort Complete callback */
  2429.   husart->TxXferCount = 0x00U;
  2430.   husart->RxXferCount = 0x00U;
  2431.  
  2432.   /* Reset errorCode */
  2433.   husart->ErrorCode = HAL_USART_ERROR_NONE;
  2434.  
  2435.   /* Restore husart->State to Ready */
  2436.   husart->State  = HAL_USART_STATE_READY;
  2437.  
  2438.   /* Call user Abort complete callback */
  2439. #if (USE_HAL_USART_REGISTER_CALLBACKS == 1)
  2440.   /* Call registered Abort Complete Callback */
  2441.   husart->AbortCpltCallback(husart);
  2442. #else
  2443.   /* Call legacy weak Abort Complete Callback */
  2444.   HAL_USART_AbortCpltCallback(husart);
  2445. #endif /* USE_HAL_USART_REGISTER_CALLBACKS */
  2446. }
  2447.  
  2448. /**
  2449.   * @brief  Simplex Send an amount of data in non-blocking mode.
  2450.   * @param  husart Pointer to a USART_HandleTypeDef structure that contains
  2451.   *                the configuration information for the specified USART module.
  2452.   * @retval HAL status
  2453.   * @note   The USART errors are not managed to avoid the overrun error.
  2454.   */
  2455. static HAL_StatusTypeDef USART_Transmit_IT(USART_HandleTypeDef *husart)
  2456. {
  2457.   uint16_t *tmp;
  2458.  
  2459.   if (husart->State == HAL_USART_STATE_BUSY_TX)
  2460.   {
  2461.     if (husart->Init.WordLength == USART_WORDLENGTH_9B)
  2462.     {
  2463.       tmp = (uint16_t *) husart->pTxBuffPtr;
  2464.       husart->Instance->DR = (uint16_t)(*tmp & (uint16_t)0x01FF);
  2465.       if (husart->Init.Parity == USART_PARITY_NONE)
  2466.       {
  2467.         husart->pTxBuffPtr += 2U;
  2468.       }
  2469.       else
  2470.       {
  2471.         husart->pTxBuffPtr += 1U;
  2472.       }
  2473.     }
  2474.     else
  2475.     {
  2476.       husart->Instance->DR = (uint8_t)(*husart->pTxBuffPtr++ & (uint8_t)0x00FF);
  2477.     }
  2478.  
  2479.     if (--husart->TxXferCount == 0U)
  2480.     {
  2481.       /* Disable the USART Transmit data register empty Interrupt */
  2482.       CLEAR_BIT(husart->Instance->CR1, USART_CR1_TXEIE);
  2483.  
  2484.       /* Enable the USART Transmit Complete Interrupt */
  2485.       SET_BIT(husart->Instance->CR1, USART_CR1_TCIE);
  2486.     }
  2487.     return HAL_OK;
  2488.   }
  2489.   else
  2490.   {
  2491.     return HAL_BUSY;
  2492.   }
  2493. }
  2494.  
  2495. /**
  2496.   * @brief  Wraps up transmission in non blocking mode.
  2497.   * @param  husart Pointer to a USART_HandleTypeDef structure that contains
  2498.   *                the configuration information for the specified USART module.
  2499.   * @retval HAL status
  2500.   */
  2501. static HAL_StatusTypeDef USART_EndTransmit_IT(USART_HandleTypeDef *husart)
  2502. {
  2503.   /* Disable the USART Transmit Complete Interrupt */
  2504.   CLEAR_BIT(husart->Instance->CR1, USART_CR1_TCIE);
  2505.  
  2506.   /* Disable the USART Error Interrupt: (Frame error, noise error, overrun error) */
  2507.   CLEAR_BIT(husart->Instance->CR3, USART_CR3_EIE);
  2508.  
  2509.   husart->State = HAL_USART_STATE_READY;
  2510.  
  2511. #if (USE_HAL_USART_REGISTER_CALLBACKS == 1)
  2512.   /* Call registered Tx Complete Callback */
  2513.   husart->TxCpltCallback(husart);
  2514. #else
  2515.   /* Call legacy weak Tx Complete Callback */
  2516.   HAL_USART_TxCpltCallback(husart);
  2517. #endif /* USE_HAL_USART_REGISTER_CALLBACKS */
  2518.  
  2519.   return HAL_OK;
  2520. }
  2521.  
  2522. /**
  2523.   * @brief  Simplex Receive an amount of data in non-blocking mode.
  2524.   * @param  husart Pointer to a USART_HandleTypeDef structure that contains
  2525.   *                the configuration information for the specified USART module.
  2526.   * @retval HAL status
  2527.   */
  2528. static HAL_StatusTypeDef USART_Receive_IT(USART_HandleTypeDef *husart)
  2529. {
  2530.   uint16_t *tmp;
  2531.   if (husart->State == HAL_USART_STATE_BUSY_RX)
  2532.   {
  2533.     if (husart->Init.WordLength == USART_WORDLENGTH_9B)
  2534.     {
  2535.       tmp = (uint16_t *) husart->pRxBuffPtr;
  2536.       if (husart->Init.Parity == USART_PARITY_NONE)
  2537.       {
  2538.         *tmp = (uint16_t)(husart->Instance->DR & (uint16_t)0x01FF);
  2539.         husart->pRxBuffPtr += 2U;
  2540.       }
  2541.       else
  2542.       {
  2543.         *tmp = (uint16_t)(husart->Instance->DR & (uint16_t)0x00FF);
  2544.         husart->pRxBuffPtr += 1U;
  2545.       }
  2546.       if (--husart->RxXferCount != 0x00U)
  2547.       {
  2548.         /* Send dummy byte in order to generate the clock for the slave to send the next data */
  2549.         husart->Instance->DR = (DUMMY_DATA & (uint16_t)0x01FF);
  2550.       }
  2551.     }
  2552.     else
  2553.     {
  2554.       if (husart->Init.Parity == USART_PARITY_NONE)
  2555.       {
  2556.         *husart->pRxBuffPtr++ = (uint8_t)(husart->Instance->DR & (uint8_t)0x00FF);
  2557.       }
  2558.       else
  2559.       {
  2560.         *husart->pRxBuffPtr++ = (uint8_t)(husart->Instance->DR & (uint8_t)0x007F);
  2561.       }
  2562.  
  2563.       if (--husart->RxXferCount != 0x00U)
  2564.       {
  2565.         /* Send dummy byte in order to generate the clock for the slave to send the next data */
  2566.         husart->Instance->DR = (DUMMY_DATA & (uint16_t)0x00FF);
  2567.       }
  2568.     }
  2569.  
  2570.     if (husart->RxXferCount == 0U)
  2571.     {
  2572.       /* Disable the USART RXNE Interrupt */
  2573.       CLEAR_BIT(husart->Instance->CR1, USART_CR1_RXNEIE);
  2574.  
  2575.       /* Disable the USART Parity Error Interrupt */
  2576.       CLEAR_BIT(husart->Instance->CR1, USART_CR1_PEIE);
  2577.  
  2578.       /* Disable the USART Error Interrupt: (Frame error, noise error, overrun error) */
  2579.       CLEAR_BIT(husart->Instance->CR3, USART_CR3_EIE);
  2580.  
  2581.       husart->State = HAL_USART_STATE_READY;
  2582. #if (USE_HAL_USART_REGISTER_CALLBACKS == 1)
  2583.       /* Call registered Rx Complete Callback */
  2584.       husart->RxCpltCallback(husart);
  2585. #else
  2586.       /* Call legacy weak Rx Complete Callback */
  2587.       HAL_USART_RxCpltCallback(husart);
  2588. #endif /* USE_HAL_USART_REGISTER_CALLBACKS */
  2589.  
  2590.       return HAL_OK;
  2591.     }
  2592.     return HAL_OK;
  2593.   }
  2594.   else
  2595.   {
  2596.     return HAL_BUSY;
  2597.   }
  2598. }
  2599.  
  2600. /**
  2601.   * @brief  Full-Duplex Send receive an amount of data in full-duplex mode (non-blocking).
  2602.   * @param  husart Pointer to a USART_HandleTypeDef structure that contains
  2603.   *                the configuration information for the specified USART module.
  2604.   * @retval HAL status
  2605.   */
  2606. static HAL_StatusTypeDef USART_TransmitReceive_IT(USART_HandleTypeDef *husart)
  2607. {
  2608.   uint16_t *tmp;
  2609.  
  2610.   if (husart->State == HAL_USART_STATE_BUSY_TX_RX)
  2611.   {
  2612.     if (husart->TxXferCount != 0x00U)
  2613.     {
  2614.       if (__HAL_USART_GET_FLAG(husart, USART_FLAG_TXE) != RESET)
  2615.       {
  2616.         if (husart->Init.WordLength == USART_WORDLENGTH_9B)
  2617.         {
  2618.           tmp = (uint16_t *) husart->pTxBuffPtr;
  2619.           husart->Instance->DR = (uint16_t)(*tmp & (uint16_t)0x01FF);
  2620.           if (husart->Init.Parity == USART_PARITY_NONE)
  2621.           {
  2622.             husart->pTxBuffPtr += 2U;
  2623.           }
  2624.           else
  2625.           {
  2626.             husart->pTxBuffPtr += 1U;
  2627.           }
  2628.         }
  2629.         else
  2630.         {
  2631.           husart->Instance->DR = (uint8_t)(*husart->pTxBuffPtr++ & (uint8_t)0x00FF);
  2632.         }
  2633.         husart->TxXferCount--;
  2634.  
  2635.         /* Check the latest data transmitted */
  2636.         if (husart->TxXferCount == 0U)
  2637.         {
  2638.           CLEAR_BIT(husart->Instance->CR1, USART_CR1_TXEIE);
  2639.         }
  2640.       }
  2641.     }
  2642.  
  2643.     if (husart->RxXferCount != 0x00U)
  2644.     {
  2645.       if (__HAL_USART_GET_FLAG(husart, USART_FLAG_RXNE) != RESET)
  2646.       {
  2647.         if (husart->Init.WordLength == USART_WORDLENGTH_9B)
  2648.         {
  2649.           tmp = (uint16_t *) husart->pRxBuffPtr;
  2650.           if (husart->Init.Parity == USART_PARITY_NONE)
  2651.           {
  2652.             *tmp = (uint16_t)(husart->Instance->DR & (uint16_t)0x01FF);
  2653.             husart->pRxBuffPtr += 2U;
  2654.           }
  2655.           else
  2656.           {
  2657.             *tmp = (uint16_t)(husart->Instance->DR & (uint16_t)0x00FF);
  2658.             husart->pRxBuffPtr += 1U;
  2659.           }
  2660.         }
  2661.         else
  2662.         {
  2663.           if (husart->Init.Parity == USART_PARITY_NONE)
  2664.           {
  2665.             *husart->pRxBuffPtr++ = (uint8_t)(husart->Instance->DR & (uint8_t)0x00FF);
  2666.           }
  2667.           else
  2668.           {
  2669.             *husart->pRxBuffPtr++ = (uint8_t)(husart->Instance->DR & (uint8_t)0x007F);
  2670.           }
  2671.         }
  2672.         husart->RxXferCount--;
  2673.       }
  2674.     }
  2675.  
  2676.     /* Check the latest data received */
  2677.     if (husart->RxXferCount == 0U)
  2678.     {
  2679.       /* Disable the USART RXNE Interrupt */
  2680.       CLEAR_BIT(husart->Instance->CR1, USART_CR1_RXNEIE);
  2681.  
  2682.       /* Disable the USART Parity Error Interrupt */
  2683.       CLEAR_BIT(husart->Instance->CR1, USART_CR1_PEIE);
  2684.  
  2685.       /* Disable the USART Error Interrupt: (Frame error, noise error, overrun error) */
  2686.       CLEAR_BIT(husart->Instance->CR3, USART_CR3_EIE);
  2687.  
  2688.       husart->State = HAL_USART_STATE_READY;
  2689.  
  2690. #if (USE_HAL_USART_REGISTER_CALLBACKS == 1)
  2691.       /* Call registered Tx Rx Complete Callback */
  2692.       husart->TxRxCpltCallback(husart);
  2693. #else
  2694.       /* Call legacy weak Tx Rx Complete Callback */
  2695.       HAL_USART_TxRxCpltCallback(husart);
  2696. #endif /* USE_HAL_USART_REGISTER_CALLBACKS */
  2697.  
  2698.       return HAL_OK;
  2699.     }
  2700.  
  2701.     return HAL_OK;
  2702.   }
  2703.   else
  2704.   {
  2705.     return HAL_BUSY;
  2706.   }
  2707. }
  2708.  
  2709. /**
  2710.   * @brief  Configures the USART peripheral.
  2711.   * @param  husart Pointer to a USART_HandleTypeDef structure that contains
  2712.   *                the configuration information for the specified USART module.
  2713.   * @retval None
  2714.   */
  2715. static void USART_SetConfig(USART_HandleTypeDef *husart)
  2716. {
  2717.   uint32_t tmpreg = 0x00U;
  2718.   uint32_t pclk;
  2719.  
  2720.   /* Check the parameters */
  2721.   assert_param(IS_USART_INSTANCE(husart->Instance));
  2722.   assert_param(IS_USART_POLARITY(husart->Init.CLKPolarity));
  2723.   assert_param(IS_USART_PHASE(husart->Init.CLKPhase));
  2724.   assert_param(IS_USART_LASTBIT(husart->Init.CLKLastBit));
  2725.   assert_param(IS_USART_BAUDRATE(husart->Init.BaudRate));
  2726.   assert_param(IS_USART_WORD_LENGTH(husart->Init.WordLength));
  2727.   assert_param(IS_USART_STOPBITS(husart->Init.StopBits));
  2728.   assert_param(IS_USART_PARITY(husart->Init.Parity));
  2729.   assert_param(IS_USART_MODE(husart->Init.Mode));
  2730.  
  2731.   /* The LBCL, CPOL and CPHA bits have to be selected when both the transmitter and the
  2732.      receiver are disabled (TE=RE=0) to ensure that the clock pulses function correctly. */
  2733.   CLEAR_BIT(husart->Instance->CR1, (USART_CR1_TE | USART_CR1_RE));
  2734.  
  2735.   /*---------------------------- USART CR2 Configuration ---------------------*/
  2736.   tmpreg = husart->Instance->CR2;
  2737.   /* Clear CLKEN, CPOL, CPHA and LBCL bits */
  2738.   tmpreg &= (uint32_t)~((uint32_t)(USART_CR2_CPHA | USART_CR2_CPOL | USART_CR2_CLKEN | USART_CR2_LBCL | USART_CR2_STOP));
  2739.   /* Configure the USART Clock, CPOL, CPHA and LastBit -----------------------*/
  2740.   /* Set CPOL bit according to husart->Init.CLKPolarity value */
  2741.   /* Set CPHA bit according to husart->Init.CLKPhase value */
  2742.   /* Set LBCL bit according to husart->Init.CLKLastBit value */
  2743.   /* Set Stop Bits: Set STOP[13:12] bits according to husart->Init.StopBits value */
  2744.   tmpreg |= (uint32_t)(USART_CLOCK_ENABLE | husart->Init.CLKPolarity |
  2745.                        husart->Init.CLKPhase | husart->Init.CLKLastBit | husart->Init.StopBits);
  2746.   /* Write to USART CR2 */
  2747.   WRITE_REG(husart->Instance->CR2, (uint32_t)tmpreg);
  2748.  
  2749.   /*-------------------------- USART CR1 Configuration -----------------------*/
  2750.   tmpreg = husart->Instance->CR1;
  2751.  
  2752.   /* Clear M, PCE, PS, TE and RE bits */
  2753.   tmpreg &= (uint32_t)~((uint32_t)(USART_CR1_M | USART_CR1_PCE | USART_CR1_PS | USART_CR1_TE | USART_CR1_RE));
  2754.  
  2755.   /* Configure the USART Word Length, Parity and mode:
  2756.      Set the M bits according to husart->Init.WordLength value
  2757.      Set PCE and PS bits according to husart->Init.Parity value
  2758.      Set TE and RE bits according to husart->Init.Mode value
  2759.    */
  2760.   tmpreg |= (uint32_t)husart->Init.WordLength | husart->Init.Parity | husart->Init.Mode;
  2761.  
  2762.   /* Write to USART CR1 */
  2763.   WRITE_REG(husart->Instance->CR1, (uint32_t)tmpreg);
  2764.  
  2765.   /*-------------------------- USART CR3 Configuration -----------------------*/
  2766.   /* Clear CTSE and RTSE bits */
  2767.   CLEAR_BIT(husart->Instance->CR3, (USART_CR3_RTSE | USART_CR3_CTSE));
  2768.  
  2769.   /*-------------------------- USART BRR Configuration -----------------------*/
  2770.   if((husart->Instance == USART1))
  2771.   {
  2772.     pclk = HAL_RCC_GetPCLK2Freq();
  2773.     husart->Instance->BRR = USART_BRR(pclk, husart->Init.BaudRate);
  2774.   }
  2775.   else
  2776.   {
  2777.     pclk = HAL_RCC_GetPCLK1Freq();
  2778.     husart->Instance->BRR = USART_BRR(pclk, husart->Init.BaudRate);
  2779.   }
  2780. }
  2781.  
  2782. /**
  2783.   * @}
  2784.   */
  2785.  
  2786. /**
  2787.   * @}
  2788.   */
  2789.  
  2790. #endif /* HAL_USART_MODULE_ENABLED */
  2791. /**
  2792.   * @}
  2793.   */
  2794.  
  2795. /**
  2796.   * @}
  2797.   */
  2798.  
  2799. /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
  2800.