diff options
Diffstat (limited to 'bsps/arm/stm32h7/hal/stm32h7xx_hal_usart.c')
| -rw-r--r-- | bsps/arm/stm32h7/hal/stm32h7xx_hal_usart.c | 3684 |
1 files changed, 3684 insertions, 0 deletions
diff --git a/bsps/arm/stm32h7/hal/stm32h7xx_hal_usart.c b/bsps/arm/stm32h7/hal/stm32h7xx_hal_usart.c new file mode 100644 index 0000000000..7157d5943d --- /dev/null +++ b/bsps/arm/stm32h7/hal/stm32h7xx_hal_usart.c @@ -0,0 +1,3684 @@ +/**
+ ******************************************************************************
+ * @file stm32h7xx_hal_usart.c
+ * @author MCD Application Team
+ * @brief USART HAL module driver.
+ * This file provides firmware functions to manage the following
+ * functionalities of the Universal Synchronous/Asynchronous Receiver Transmitter
+ * Peripheral (USART).
+ * + Initialization and de-initialization functions
+ * + IO operation functions
+ * + Peripheral Control functions
+ * + Peripheral State and Error functions
+ *
+ @verbatim
+ ===============================================================================
+ ##### How to use this driver #####
+ ===============================================================================
+ [..]
+ The USART HAL driver can be used as follows:
+
+ (#) Declare a USART_HandleTypeDef handle structure (eg. USART_HandleTypeDef husart).
+ (#) Initialize the USART low level resources by implementing the HAL_USART_MspInit() API:
+ (++) Enable the USARTx interface clock.
+ (++) USART pins configuration:
+ (+++) Enable the clock for the USART GPIOs.
+ (+++) Configure these USART pins as alternate function pull-up.
+ (++) NVIC configuration if you need to use interrupt process (HAL_USART_Transmit_IT(),
+ HAL_USART_Receive_IT() and HAL_USART_TransmitReceive_IT() APIs):
+ (+++) Configure the USARTx interrupt priority.
+ (+++) Enable the NVIC USART IRQ handle.
+ (++) USART interrupts handling:
+ -@@- The specific USART interrupts (Transmission complete interrupt,
+ RXNE interrupt and Error Interrupts) will be managed using the macros
+ __HAL_USART_ENABLE_IT() and __HAL_USART_DISABLE_IT() inside the transmit and receive process.
+ (++) DMA Configuration if you need to use DMA process (HAL_USART_Transmit_DMA()
+ HAL_USART_Receive_DMA() and HAL_USART_TransmitReceive_DMA() APIs):
+ (+++) Declare a DMA handle structure for the Tx/Rx channel.
+ (+++) Enable the DMAx interface clock.
+ (+++) Configure the declared DMA handle structure with the required Tx/Rx parameters.
+ (+++) Configure the DMA Tx/Rx channel.
+ (+++) Associate the initialized DMA handle to the USART DMA Tx/Rx handle.
+ (+++) Configure the priority and enable the NVIC for the transfer complete interrupt on the DMA Tx/Rx channel.
+
+ (#) Program the Baud Rate, Word Length, Stop Bit, Parity, and Mode
+ (Receiver/Transmitter) in the husart handle Init structure.
+
+ (#) Initialize the USART registers by calling the HAL_USART_Init() API:
+ (++) This API configures also the low level Hardware GPIO, CLOCK, CORTEX...etc)
+ by calling the customized HAL_USART_MspInit(&husart) API.
+
+ [..]
+ (@) To configure and enable/disable the USART to wake up the MCU from stop mode, resort to UART API's
+ HAL_UARTEx_StopModeWakeUpSourceConfig(), HAL_UARTEx_EnableStopMode() and
+ HAL_UARTEx_DisableStopMode() in casting the USART handle to UART type UART_HandleTypeDef.
+
+ ##### Callback registration #####
+ ==================================
+
+ [..]
+ The compilation define USE_HAL_USART_REGISTER_CALLBACKS when set to 1
+ allows the user to configure dynamically the driver callbacks.
+
+ [..]
+ Use Function @ref HAL_USART_RegisterCallback() to register a user callback.
+ Function @ref HAL_USART_RegisterCallback() allows to register following callbacks:
+ (+) TxHalfCpltCallback : Tx Half Complete Callback.
+ (+) TxCpltCallback : Tx Complete Callback.
+ (+) RxHalfCpltCallback : Rx Half Complete Callback.
+ (+) RxCpltCallback : Rx Complete Callback.
+ (+) TxRxCpltCallback : Tx Rx Complete Callback.
+ (+) ErrorCallback : Error Callback.
+ (+) AbortCpltCallback : Abort Complete Callback.
+ (+) RxFifoFullCallback : Rx Fifo Full Callback.
+ (+) TxFifoEmptyCallback : Tx Fifo Empty Callback.
+ (+) MspInitCallback : USART MspInit.
+ (+) MspDeInitCallback : USART MspDeInit.
+ This function takes as parameters the HAL peripheral handle, the Callback ID
+ and a pointer to the user callback function.
+
+ [..]
+ Use function @ref HAL_USART_UnRegisterCallback() to reset a callback to the default
+ weak (surcharged) function.
+ @ref HAL_USART_UnRegisterCallback() takes as parameters the HAL peripheral handle,
+ and the Callback ID.
+ This function allows to reset following callbacks:
+ (+) TxHalfCpltCallback : Tx Half Complete Callback.
+ (+) TxCpltCallback : Tx Complete Callback.
+ (+) RxHalfCpltCallback : Rx Half Complete Callback.
+ (+) RxCpltCallback : Rx Complete Callback.
+ (+) TxRxCpltCallback : Tx Rx Complete Callback.
+ (+) ErrorCallback : Error Callback.
+ (+) AbortCpltCallback : Abort Complete Callback.
+ (+) RxFifoFullCallback : Rx Fifo Full Callback.
+ (+) TxFifoEmptyCallback : Tx Fifo Empty Callback.
+ (+) MspInitCallback : USART MspInit.
+ (+) MspDeInitCallback : USART MspDeInit.
+
+ [..]
+ By default, after the @ref HAL_USART_Init() and when the state is HAL_USART_STATE_RESET
+ all callbacks are set to the corresponding weak (surcharged) functions:
+ examples @ref HAL_USART_TxCpltCallback(), @ref HAL_USART_RxHalfCpltCallback().
+ Exception done for MspInit and MspDeInit functions that are respectively
+ reset to the legacy weak (surcharged) functions in the @ref HAL_USART_Init()
+ and @ref HAL_USART_DeInit() only when these callbacks are null (not registered beforehand).
+ If not, MspInit or MspDeInit are not null, the @ref HAL_USART_Init() and @ref HAL_USART_DeInit()
+ keep and use the user MspInit/MspDeInit callbacks (registered beforehand).
+
+ [..]
+ Callbacks can be registered/unregistered in HAL_USART_STATE_READY state only.
+ Exception done MspInit/MspDeInit that can be registered/unregistered
+ in HAL_USART_STATE_READY or HAL_USART_STATE_RESET state, thus registered (user)
+ MspInit/DeInit callbacks can be used during the Init/DeInit.
+ In that case first register the MspInit/MspDeInit user callbacks
+ using @ref HAL_USART_RegisterCallback() before calling @ref HAL_USART_DeInit()
+ or @ref HAL_USART_Init() function.
+
+ [..]
+ When The compilation define USE_HAL_USART_REGISTER_CALLBACKS is set to 0 or
+ not defined, the callback registration feature is not available
+ and weak (surcharged) callbacks are used.
+
+
+ @endverbatim
+ ******************************************************************************
+ * @attention
+ *
+ * <h2><center>© Copyright (c) 2017 STMicroelectronics.
+ * All rights reserved.</center></h2>
+ *
+ * This software component is licensed by ST under BSD 3-Clause license,
+ * the "License"; You may not use this file except in compliance with the
+ * License. You may obtain a copy of the License at:
+ * opensource.org/licenses/BSD-3-Clause
+ *
+ ******************************************************************************
+ */
+
+/* Includes ------------------------------------------------------------------*/
+#include "stm32h7xx_hal.h"
+
+/** @addtogroup STM32H7xx_HAL_Driver
+ * @{
+ */
+
+/** @defgroup USART USART
+ * @brief HAL USART Synchronous module driver
+ * @{
+ */
+
+#ifdef HAL_USART_MODULE_ENABLED
+
+/* Private typedef -----------------------------------------------------------*/
+/* Private define ------------------------------------------------------------*/
+/** @defgroup USART_Private_Constants USART Private Constants
+ * @{
+ */
+#define USART_DUMMY_DATA ((uint16_t) 0xFFFF) /*!< USART transmitted dummy data */
+#define USART_TEACK_REACK_TIMEOUT 1000U /*!< USART TX or RX enable acknowledge time-out value */
+#define USART_CR1_FIELDS ((uint32_t)(USART_CR1_M | USART_CR1_PCE | USART_CR1_PS | \
+ USART_CR1_TE | USART_CR1_RE | USART_CR1_OVER8 | \
+ USART_CR1_FIFOEN )) /*!< USART CR1 fields of parameters set by USART_SetConfig API */
+
+#define USART_CR2_FIELDS ((uint32_t)(USART_CR2_CPHA | USART_CR2_CPOL | USART_CR2_CLKEN | \
+ USART_CR2_LBCL | USART_CR2_STOP | USART_CR2_SLVEN | \
+ USART_CR2_DIS_NSS)) /*!< USART CR2 fields of parameters set by USART_SetConfig API */
+
+#define USART_CR3_FIELDS ((uint32_t)(USART_CR3_TXFTCFG | USART_CR3_RXFTCFG )) /*!< USART or USART CR3 fields of parameters set by USART_SetConfig API */
+
+#define USART_BRR_MIN 0x10U /* USART BRR minimum authorized value */
+#define USART_BRR_MAX 0xFFFFU /* USART BRR maximum authorized value */
+/**
+ * @}
+ */
+
+/* Private macros ------------------------------------------------------------*/
+/* Private variables ---------------------------------------------------------*/
+/* Private function prototypes -----------------------------------------------*/
+/** @addtogroup USART_Private_Functions
+ * @{
+ */
+#if (USE_HAL_USART_REGISTER_CALLBACKS == 1)
+void USART_InitCallbacksToDefault(USART_HandleTypeDef *husart);
+#endif /* USE_HAL_USART_REGISTER_CALLBACKS */
+static void USART_EndTransfer(USART_HandleTypeDef *husart);
+static void USART_DMATransmitCplt(DMA_HandleTypeDef *hdma);
+static void USART_DMAReceiveCplt(DMA_HandleTypeDef *hdma);
+static void USART_DMATxHalfCplt(DMA_HandleTypeDef *hdma);
+static void USART_DMARxHalfCplt(DMA_HandleTypeDef *hdma);
+static void USART_DMAError(DMA_HandleTypeDef *hdma);
+static void USART_DMAAbortOnError(DMA_HandleTypeDef *hdma);
+static void USART_DMATxAbortCallback(DMA_HandleTypeDef *hdma);
+static void USART_DMARxAbortCallback(DMA_HandleTypeDef *hdma);
+static HAL_StatusTypeDef USART_WaitOnFlagUntilTimeout(USART_HandleTypeDef *husart, uint32_t Flag, FlagStatus Status,
+ uint32_t Tickstart, uint32_t Timeout);
+static HAL_StatusTypeDef USART_SetConfig(USART_HandleTypeDef *husart);
+static HAL_StatusTypeDef USART_CheckIdleState(USART_HandleTypeDef *husart);
+static void USART_TxISR_8BIT(USART_HandleTypeDef *husart);
+static void USART_TxISR_16BIT(USART_HandleTypeDef *husart);
+static void USART_TxISR_8BIT_FIFOEN(USART_HandleTypeDef *husart);
+static void USART_TxISR_16BIT_FIFOEN(USART_HandleTypeDef *husart);
+static void USART_EndTransmit_IT(USART_HandleTypeDef *husart);
+static void USART_RxISR_8BIT(USART_HandleTypeDef *husart);
+static void USART_RxISR_16BIT(USART_HandleTypeDef *husart);
+static void USART_RxISR_8BIT_FIFOEN(USART_HandleTypeDef *husart);
+static void USART_RxISR_16BIT_FIFOEN(USART_HandleTypeDef *husart);
+
+
+/**
+ * @}
+ */
+
+/* Exported functions --------------------------------------------------------*/
+
+/** @defgroup USART_Exported_Functions USART Exported Functions
+ * @{
+ */
+
+/** @defgroup USART_Exported_Functions_Group1 Initialization and de-initialization functions
+ * @brief Initialization and Configuration functions
+ *
+@verbatim
+ ===============================================================================
+ ##### Initialization and Configuration functions #####
+ ===============================================================================
+ [..]
+ This subsection provides a set of functions allowing to initialize the USART
+ in asynchronous and in synchronous modes.
+ (+) For the asynchronous mode only these parameters can be configured:
+ (++) Baud Rate
+ (++) Word Length
+ (++) Stop Bit
+ (++) Parity: If the parity is enabled, then the MSB bit of the data written
+ in the data register is transmitted but is changed by the parity bit.
+ (++) USART polarity
+ (++) USART phase
+ (++) USART LastBit
+ (++) Receiver/transmitter modes
+
+ [..]
+ The HAL_USART_Init() function follows the USART synchronous configuration
+ procedure (details for the procedure are available in reference manual).
+
+@endverbatim
+
+ Depending on the frame length defined by the M1 and M0 bits (7-bit,
+ 8-bit or 9-bit), the possible USART formats are listed in the
+ following table.
+
+ Table 1. USART frame format.
+ +-----------------------------------------------------------------------+
+ | M1 bit | M0 bit | PCE bit | USART frame |
+ |---------|---------|-----------|---------------------------------------|
+ | 0 | 0 | 0 | | SB | 8 bit data | STB | |
+ |---------|---------|-----------|---------------------------------------|
+ | 0 | 0 | 1 | | SB | 7 bit data | PB | STB | |
+ |---------|---------|-----------|---------------------------------------|
+ | 0 | 1 | 0 | | SB | 9 bit data | STB | |
+ |---------|---------|-----------|---------------------------------------|
+ | 0 | 1 | 1 | | SB | 8 bit data | PB | STB | |
+ |---------|---------|-----------|---------------------------------------|
+ | 1 | 0 | 0 | | SB | 7 bit data | STB | |
+ |---------|---------|-----------|---------------------------------------|
+ | 1 | 0 | 1 | | SB | 6 bit data | PB | STB | |
+ +-----------------------------------------------------------------------+
+
+ * @{
+ */
+
+/**
+ * @brief Initialize the USART mode according to the specified
+ * parameters in the USART_InitTypeDef and initialize the associated handle.
+ * @param husart USART handle.
+ * @retval HAL status
+ */
+HAL_StatusTypeDef HAL_USART_Init(USART_HandleTypeDef *husart)
+{
+ /* Check the USART handle allocation */
+ if (husart == NULL)
+ {
+ return HAL_ERROR;
+ }
+
+ /* Check the parameters */
+ assert_param(IS_USART_INSTANCE(husart->Instance));
+
+ if (husart->State == HAL_USART_STATE_RESET)
+ {
+ /* Allocate lock resource and initialize it */
+ husart->Lock = HAL_UNLOCKED;
+
+#if (USE_HAL_USART_REGISTER_CALLBACKS == 1)
+ USART_InitCallbacksToDefault(husart);
+
+ if (husart->MspInitCallback == NULL)
+ {
+ husart->MspInitCallback = HAL_USART_MspInit;
+ }
+
+ /* Init the low level hardware */
+ husart->MspInitCallback(husart);
+#else
+ /* Init the low level hardware : GPIO, CLOCK */
+ HAL_USART_MspInit(husart);
+#endif /* USE_HAL_USART_REGISTER_CALLBACKS */
+ }
+
+ husart->State = HAL_USART_STATE_BUSY;
+
+ /* Disable the Peripheral */
+ __HAL_USART_DISABLE(husart);
+
+ /* Set the Usart Communication parameters */
+ if (USART_SetConfig(husart) == HAL_ERROR)
+ {
+ return HAL_ERROR;
+ }
+
+ /* In Synchronous mode, the following bits must be kept cleared:
+ - LINEN bit in the USART_CR2 register
+ - HDSEL, SCEN and IREN bits in the USART_CR3 register.
+ */
+ husart->Instance->CR2 &= ~USART_CR2_LINEN;
+ husart->Instance->CR3 &= ~(USART_CR3_SCEN | USART_CR3_HDSEL | USART_CR3_IREN);
+
+ /* Enable the Peripheral */
+ __HAL_USART_ENABLE(husart);
+
+ /* TEACK and/or REACK to check before moving husart->State to Ready */
+ return (USART_CheckIdleState(husart));
+}
+
+/**
+ * @brief DeInitialize the USART peripheral.
+ * @param husart USART handle.
+ * @retval HAL status
+ */
+HAL_StatusTypeDef HAL_USART_DeInit(USART_HandleTypeDef *husart)
+{
+ /* Check the USART handle allocation */
+ if (husart == NULL)
+ {
+ return HAL_ERROR;
+ }
+
+ /* Check the parameters */
+ assert_param(IS_USART_INSTANCE(husart->Instance));
+
+ husart->State = HAL_USART_STATE_BUSY;
+
+ husart->Instance->CR1 = 0x0U;
+ husart->Instance->CR2 = 0x0U;
+ husart->Instance->CR3 = 0x0U;
+
+#if (USE_HAL_USART_REGISTER_CALLBACKS == 1)
+ if (husart->MspDeInitCallback == NULL)
+ {
+ husart->MspDeInitCallback = HAL_USART_MspDeInit;
+ }
+ /* DeInit the low level hardware */
+ husart->MspDeInitCallback(husart);
+#else
+ /* DeInit the low level hardware */
+ HAL_USART_MspDeInit(husart);
+#endif /* USE_HAL_USART_REGISTER_CALLBACKS */
+
+ husart->ErrorCode = HAL_USART_ERROR_NONE;
+ husart->State = HAL_USART_STATE_RESET;
+
+ /* Process Unlock */
+ __HAL_UNLOCK(husart);
+
+ return HAL_OK;
+}
+
+/**
+ * @brief Initialize the USART MSP.
+ * @param husart USART handle.
+ * @retval None
+ */
+__weak void HAL_USART_MspInit(USART_HandleTypeDef *husart)
+{
+ /* Prevent unused argument(s) compilation warning */
+ UNUSED(husart);
+
+ /* NOTE : This function should not be modified, when the callback is needed,
+ the HAL_USART_MspInit can be implemented in the user file
+ */
+}
+
+/**
+ * @brief DeInitialize the USART MSP.
+ * @param husart USART handle.
+ * @retval None
+ */
+__weak void HAL_USART_MspDeInit(USART_HandleTypeDef *husart)
+{
+ /* Prevent unused argument(s) compilation warning */
+ UNUSED(husart);
+
+ /* NOTE : This function should not be modified, when the callback is needed,
+ the HAL_USART_MspDeInit can be implemented in the user file
+ */
+}
+
+#if (USE_HAL_USART_REGISTER_CALLBACKS == 1)
+/**
+ * @brief Register a User USART Callback
+ * To be used instead of the weak predefined callback
+ * @param husart usart handle
+ * @param CallbackID ID of the callback to be registered
+ * This parameter can be one of the following values:
+ * @arg @ref HAL_USART_TX_HALFCOMPLETE_CB_ID Tx Half Complete Callback ID
+ * @arg @ref HAL_USART_TX_COMPLETE_CB_ID Tx Complete Callback ID
+ * @arg @ref HAL_USART_RX_HALFCOMPLETE_CB_ID Rx Half Complete Callback ID
+ * @arg @ref HAL_USART_RX_COMPLETE_CB_ID Rx Complete Callback ID
+ * @arg @ref HAL_USART_TX_RX_COMPLETE_CB_ID Rx Complete Callback ID
+ * @arg @ref HAL_USART_ERROR_CB_ID Error Callback ID
+ * @arg @ref HAL_USART_ABORT_COMPLETE_CB_ID Abort Complete Callback ID
+ * @arg @ref HAL_USART_RX_FIFO_FULL_CB_ID Rx Fifo Full Callback ID
+ * @arg @ref HAL_USART_TX_FIFO_EMPTY_CB_ID Tx Fifo Empty Callback ID
+ * @arg @ref HAL_USART_MSPINIT_CB_ID MspInit Callback ID
+ * @arg @ref HAL_USART_MSPDEINIT_CB_ID MspDeInit Callback ID
+ * @param pCallback pointer to the Callback function
+ * @retval HAL status
++ */
+HAL_StatusTypeDef HAL_USART_RegisterCallback(USART_HandleTypeDef *husart, HAL_USART_CallbackIDTypeDef CallbackID,
+ pUSART_CallbackTypeDef pCallback)
+{
+ HAL_StatusTypeDef status = HAL_OK;
+
+ if (pCallback == NULL)
+ {
+ /* Update the error code */
+ husart->ErrorCode |= HAL_USART_ERROR_INVALID_CALLBACK;
+
+ return HAL_ERROR;
+ }
+ /* Process locked */
+ __HAL_LOCK(husart);
+
+ if (husart->State == HAL_USART_STATE_READY)
+ {
+ switch (CallbackID)
+ {
+ case HAL_USART_TX_HALFCOMPLETE_CB_ID :
+ husart->TxHalfCpltCallback = pCallback;
+ break;
+
+ case HAL_USART_TX_COMPLETE_CB_ID :
+ husart->TxCpltCallback = pCallback;
+ break;
+
+ case HAL_USART_RX_HALFCOMPLETE_CB_ID :
+ husart->RxHalfCpltCallback = pCallback;
+ break;
+
+ case HAL_USART_RX_COMPLETE_CB_ID :
+ husart->RxCpltCallback = pCallback;
+ break;
+
+ case HAL_USART_TX_RX_COMPLETE_CB_ID :
+ husart->TxRxCpltCallback = pCallback;
+ break;
+
+ case HAL_USART_ERROR_CB_ID :
+ husart->ErrorCallback = pCallback;
+ break;
+
+ case HAL_USART_ABORT_COMPLETE_CB_ID :
+ husart->AbortCpltCallback = pCallback;
+ break;
+
+ case HAL_USART_RX_FIFO_FULL_CB_ID :
+ husart->RxFifoFullCallback = pCallback;
+ break;
+
+ case HAL_USART_TX_FIFO_EMPTY_CB_ID :
+ husart->TxFifoEmptyCallback = pCallback;
+ break;
+
+ case HAL_USART_MSPINIT_CB_ID :
+ husart->MspInitCallback = pCallback;
+ break;
+
+ case HAL_USART_MSPDEINIT_CB_ID :
+ husart->MspDeInitCallback = pCallback;
+ break;
+
+ default :
+ /* Update the error code */
+ husart->ErrorCode |= HAL_USART_ERROR_INVALID_CALLBACK;
+
+ /* Return error status */
+ status = HAL_ERROR;
+ break;
+ }
+ }
+ else if (husart->State == HAL_USART_STATE_RESET)
+ {
+ switch (CallbackID)
+ {
+ case HAL_USART_MSPINIT_CB_ID :
+ husart->MspInitCallback = pCallback;
+ break;
+
+ case HAL_USART_MSPDEINIT_CB_ID :
+ husart->MspDeInitCallback = pCallback;
+ break;
+
+ default :
+ /* Update the error code */
+ husart->ErrorCode |= HAL_USART_ERROR_INVALID_CALLBACK;
+
+ /* Return error status */
+ status = HAL_ERROR;
+ break;
+ }
+ }
+ else
+ {
+ /* Update the error code */
+ husart->ErrorCode |= HAL_USART_ERROR_INVALID_CALLBACK;
+
+ /* Return error status */
+ status = HAL_ERROR;
+ }
+
+ /* Release Lock */
+ __HAL_UNLOCK(husart);
+
+ return status;
+}
+
+/**
+ * @brief Unregister an UART Callback
+ * UART callaback is redirected to the weak predefined callback
+ * @param husart uart handle
+ * @param CallbackID ID of the callback to be unregistered
+ * This parameter can be one of the following values:
+ * @arg @ref HAL_USART_TX_HALFCOMPLETE_CB_ID Tx Half Complete Callback ID
+ * @arg @ref HAL_USART_TX_COMPLETE_CB_ID Tx Complete Callback ID
+ * @arg @ref HAL_USART_RX_HALFCOMPLETE_CB_ID Rx Half Complete Callback ID
+ * @arg @ref HAL_USART_RX_COMPLETE_CB_ID Rx Complete Callback ID
+ * @arg @ref HAL_USART_TX_RX_COMPLETE_CB_ID Rx Complete Callback ID
+ * @arg @ref HAL_USART_ERROR_CB_ID Error Callback ID
+ * @arg @ref HAL_USART_ABORT_COMPLETE_CB_ID Abort Complete Callback ID
+ * @arg @ref HAL_USART_RX_FIFO_FULL_CB_ID Rx Fifo Full Callback ID
+ * @arg @ref HAL_USART_TX_FIFO_EMPTY_CB_ID Tx Fifo Empty Callback ID
+ * @arg @ref HAL_USART_MSPINIT_CB_ID MspInit Callback ID
+ * @arg @ref HAL_USART_MSPDEINIT_CB_ID MspDeInit Callback ID
+ * @retval HAL status
+ */
+HAL_StatusTypeDef HAL_USART_UnRegisterCallback(USART_HandleTypeDef *husart, HAL_USART_CallbackIDTypeDef CallbackID)
+{
+ HAL_StatusTypeDef status = HAL_OK;
+
+ /* Process locked */
+ __HAL_LOCK(husart);
+
+ if (HAL_USART_STATE_READY == husart->State)
+ {
+ switch (CallbackID)
+ {
+ case HAL_USART_TX_HALFCOMPLETE_CB_ID :
+ husart->TxHalfCpltCallback = HAL_USART_TxHalfCpltCallback; /* Legacy weak TxHalfCpltCallback */
+ break;
+
+ case HAL_USART_TX_COMPLETE_CB_ID :
+ husart->TxCpltCallback = HAL_USART_TxCpltCallback; /* Legacy weak TxCpltCallback */
+ break;
+
+ case HAL_USART_RX_HALFCOMPLETE_CB_ID :
+ husart->RxHalfCpltCallback = HAL_USART_RxHalfCpltCallback; /* Legacy weak RxHalfCpltCallback */
+ break;
+
+ case HAL_USART_RX_COMPLETE_CB_ID :
+ husart->RxCpltCallback = HAL_USART_RxCpltCallback; /* Legacy weak RxCpltCallback */
+ break;
+
+ case HAL_USART_TX_RX_COMPLETE_CB_ID :
+ husart->TxRxCpltCallback = HAL_USART_TxRxCpltCallback; /* Legacy weak TxRxCpltCallback */
+ break;
+
+ case HAL_USART_ERROR_CB_ID :
+ husart->ErrorCallback = HAL_USART_ErrorCallback; /* Legacy weak ErrorCallback */
+ break;
+
+ case HAL_USART_ABORT_COMPLETE_CB_ID :
+ husart->AbortCpltCallback = HAL_USART_AbortCpltCallback; /* Legacy weak AbortCpltCallback */
+ break;
+
+ case HAL_USART_RX_FIFO_FULL_CB_ID :
+ husart->RxFifoFullCallback = HAL_USARTEx_RxFifoFullCallback; /* Legacy weak RxFifoFullCallback */
+ break;
+
+ case HAL_USART_TX_FIFO_EMPTY_CB_ID :
+ husart->TxFifoEmptyCallback = HAL_USARTEx_TxFifoEmptyCallback; /* Legacy weak TxFifoEmptyCallback */
+ break;
+
+ case HAL_USART_MSPINIT_CB_ID :
+ husart->MspInitCallback = HAL_USART_MspInit; /* Legacy weak MspInitCallback */
+ break;
+
+ case HAL_USART_MSPDEINIT_CB_ID :
+ husart->MspDeInitCallback = HAL_USART_MspDeInit; /* Legacy weak MspDeInitCallback */
+ break;
+
+ default :
+ /* Update the error code */
+ husart->ErrorCode |= HAL_USART_ERROR_INVALID_CALLBACK;
+
+ /* Return error status */
+ status = HAL_ERROR;
+ break;
+ }
+ }
+ else if (HAL_USART_STATE_RESET == husart->State)
+ {
+ switch (CallbackID)
+ {
+ case HAL_USART_MSPINIT_CB_ID :
+ husart->MspInitCallback = HAL_USART_MspInit;
+ break;
+
+ case HAL_USART_MSPDEINIT_CB_ID :
+ husart->MspDeInitCallback = HAL_USART_MspDeInit;
+ break;
+
+ default :
+ /* Update the error code */
+ husart->ErrorCode |= HAL_USART_ERROR_INVALID_CALLBACK;
+
+ /* Return error status */
+ status = HAL_ERROR;
+ break;
+ }
+ }
+ else
+ {
+ /* Update the error code */
+ husart->ErrorCode |= HAL_USART_ERROR_INVALID_CALLBACK;
+
+ /* Return error status */
+ status = HAL_ERROR;
+ }
+
+ /* Release Lock */
+ __HAL_UNLOCK(husart);
+
+ return status;
+}
+#endif /* USE_HAL_USART_REGISTER_CALLBACKS */
+
+
+/**
+ * @}
+ */
+
+/** @defgroup USART_Exported_Functions_Group2 IO operation functions
+ * @brief USART Transmit and Receive functions
+ *
+@verbatim
+ ===============================================================================
+ ##### IO operation functions #####
+ ===============================================================================
+ [..] This subsection provides a set of functions allowing to manage the USART synchronous
+ data transfers.
+
+ [..] The USART supports master mode only: it cannot receive or send data related to an input
+ clock (SCLK is always an output).
+
+ [..]
+
+ (#) There are two modes of transfer:
+ (++) Blocking mode: The communication is performed in polling mode.
+ The HAL status of all data processing is returned by the same function
+ after finishing transfer.
+ (++) No-Blocking mode: The communication is performed using Interrupts
+ or DMA, These API's return the HAL status.
+ The end of the data processing will be indicated through the
+ dedicated USART IRQ when using Interrupt mode or the DMA IRQ when
+ using DMA mode.
+ The HAL_USART_TxCpltCallback(), HAL_USART_RxCpltCallback() and HAL_USART_TxRxCpltCallback() user callbacks
+ will be executed respectively at the end of the transmit or Receive process
+ The HAL_USART_ErrorCallback()user callback will be executed when a communication error is detected
+
+ (#) Blocking mode API's are :
+ (++) HAL_USART_Transmit() in simplex mode
+ (++) HAL_USART_Receive() in full duplex receive only
+ (++) HAL_USART_TransmitReceive() in full duplex mode
+
+ (#) Non-Blocking mode API's with Interrupt are :
+ (++) HAL_USART_Transmit_IT() in simplex mode
+ (++) HAL_USART_Receive_IT() in full duplex receive only
+ (++) HAL_USART_TransmitReceive_IT() in full duplex mode
+ (++) HAL_USART_IRQHandler()
+
+ (#) No-Blocking mode API's with DMA are :
+ (++) HAL_USART_Transmit_DMA() in simplex mode
+ (++) HAL_USART_Receive_DMA() in full duplex receive only
+ (++) HAL_USART_TransmitReceive_DMA() in full duplex mode
+ (++) HAL_USART_DMAPause()
+ (++) HAL_USART_DMAResume()
+ (++) HAL_USART_DMAStop()
+
+ (#) A set of Transfer Complete Callbacks are provided in Non_Blocking mode:
+ (++) HAL_USART_TxCpltCallback()
+ (++) HAL_USART_RxCpltCallback()
+ (++) HAL_USART_TxHalfCpltCallback()
+ (++) HAL_USART_RxHalfCpltCallback()
+ (++) HAL_USART_ErrorCallback()
+ (++) HAL_USART_TxRxCpltCallback()
+
+ (#) Non-Blocking mode transfers could be aborted using Abort API's :
+ (++) HAL_USART_Abort()
+ (++) HAL_USART_Abort_IT()
+
+ (#) For Abort services based on interrupts (HAL_USART_Abort_IT), a Abort Complete Callbacks is provided:
+ (++) HAL_USART_AbortCpltCallback()
+
+ (#) In Non-Blocking mode transfers, possible errors are split into 2 categories.
+ Errors are handled as follows :
+ (++) Error is considered as Recoverable and non blocking : Transfer could go till end, but error severity is
+ to be evaluated by user : this concerns Frame Error, Parity Error or Noise Error in Interrupt mode reception .
+ Received character is then retrieved and stored in Rx buffer, Error code is set to allow user to identify error type,
+ and HAL_USART_ErrorCallback() user callback is executed. Transfer is kept ongoing on USART side.
+ If user wants to abort it, Abort services should be called by user.
+ (++) Error is considered as Blocking : Transfer could not be completed properly and is aborted.
+ This concerns Overrun Error In Interrupt mode reception and all errors in DMA mode.
+ Error code is set to allow user to identify error type, and HAL_USART_ErrorCallback() user callback is executed.
+
+@endverbatim
+ * @{
+ */
+
+/**
+ * @brief Simplex send an amount of data in blocking mode.
+ * @note When UART parity is not enabled (PCE = 0), and Word Length is configured to 9 bits (M1-M0 = 01),
+ * the sent data is handled as a set of u16. In this case, Size must indicate the number
+ * of u16 provided through pTxData.
+ * @param husart USART handle.
+ * @param pTxData Pointer to data buffer (u8 or u16 data elements).
+ * @param Size Amount of data elements (u8 or u16) to be sent.
+ * @param Timeout Timeout duration.
+ * @retval HAL status
+ */
+HAL_StatusTypeDef HAL_USART_Transmit(USART_HandleTypeDef *husart, uint8_t *pTxData, uint16_t Size, uint32_t Timeout)
+{
+ uint8_t *ptxdata8bits;
+ uint16_t *ptxdata16bits;
+ uint32_t tickstart;
+
+ if (husart->State == HAL_USART_STATE_READY)
+ {
+ if ((pTxData == NULL) || (Size == 0U))
+ {
+ return HAL_ERROR;
+ }
+
+ /* Process Locked */
+ __HAL_LOCK(husart);
+
+ husart->ErrorCode = HAL_USART_ERROR_NONE;
+ husart->State = HAL_USART_STATE_BUSY_TX;
+
+ /* Init tickstart for timeout managment*/
+ tickstart = HAL_GetTick();
+
+ husart->TxXferSize = Size;
+ husart->TxXferCount = Size;
+
+ /* In case of 9bits/No Parity transfer, pTxData needs to be handled as a uint16_t pointer */
+ if ((husart->Init.WordLength == USART_WORDLENGTH_9B) && (husart->Init.Parity == USART_PARITY_NONE))
+ {
+ ptxdata8bits = NULL;
+ ptxdata16bits = (uint16_t *) pTxData;
+ }
+ else
+ {
+ ptxdata8bits = pTxData;
+ ptxdata16bits = NULL;
+ }
+
+ /* Check the remaining data to be sent */
+ while (husart->TxXferCount > 0U)
+ {
+ if (USART_WaitOnFlagUntilTimeout(husart, USART_FLAG_TXE, RESET, tickstart, Timeout) != HAL_OK)
+ {
+ return HAL_TIMEOUT;
+ }
+ if (ptxdata8bits == NULL)
+ {
+ husart->Instance->TDR = (uint16_t)(*ptxdata16bits & 0x01FFU);
+ ptxdata16bits++;
+ }
+ else
+ {
+ husart->Instance->TDR = (uint8_t)(*ptxdata8bits & 0xFFU);
+ ptxdata8bits++;
+ }
+
+ husart->TxXferCount--;
+ }
+
+ if (USART_WaitOnFlagUntilTimeout(husart, USART_FLAG_TC, RESET, tickstart, Timeout) != HAL_OK)
+ {
+ return HAL_TIMEOUT;
+ }
+
+ /* Clear Transmission Complete Flag */
+ __HAL_USART_CLEAR_FLAG(husart, USART_CLEAR_TCF);
+
+ /* Clear overrun flag and discard the received data */
+ __HAL_USART_CLEAR_OREFLAG(husart);
+ __HAL_USART_SEND_REQ(husart, USART_RXDATA_FLUSH_REQUEST);
+ __HAL_USART_SEND_REQ(husart, USART_TXDATA_FLUSH_REQUEST);
+
+ /* At end of Tx process, restore husart->State to Ready */
+ husart->State = HAL_USART_STATE_READY;
+
+ /* Process Unlocked */
+ __HAL_UNLOCK(husart);
+
+ return HAL_OK;
+ }
+ else
+ {
+ return HAL_BUSY;
+ }
+}
+
+/**
+ * @brief Receive an amount of data in blocking mode.
+ * @note To receive synchronous data, dummy data are simultaneously transmitted.
+ * @note When UART parity is not enabled (PCE = 0), and Word Length is configured to 9 bits (M1-M0 = 01),
+ * the received data is handled as a set of u16. In this case, Size must indicate the number
+ * of u16 available through pRxData.
+ * @param husart USART handle.
+ * @param pRxData Pointer to data buffer (u8 or u16 data elements).
+ * @param Size Amount of data elements (u8 or u16) to be received.
+ * @param Timeout Timeout duration.
+ * @retval HAL status
+ */
+HAL_StatusTypeDef HAL_USART_Receive(USART_HandleTypeDef *husart, uint8_t *pRxData, uint16_t Size, uint32_t Timeout)
+{
+ uint8_t *prxdata8bits;
+ uint16_t *prxdata16bits;
+ uint16_t uhMask;
+ uint32_t tickstart;
+
+ if (husart->State == HAL_USART_STATE_READY)
+ {
+ if ((pRxData == NULL) || (Size == 0U))
+ {
+ return HAL_ERROR;
+ }
+
+ /* Process Locked */
+ __HAL_LOCK(husart);
+
+ husart->ErrorCode = HAL_USART_ERROR_NONE;
+ husart->State = HAL_USART_STATE_BUSY_RX;
+
+ /* Init tickstart for timeout managment*/
+ tickstart = HAL_GetTick();
+
+ husart->RxXferSize = Size;
+ husart->RxXferCount = Size;
+
+ /* Computation of USART mask to apply to RDR register */
+ USART_MASK_COMPUTATION(husart);
+ uhMask = husart->Mask;
+
+ /* In case of 9bits/No Parity transfer, pRxData needs to be handled as a uint16_t pointer */
+ if ((husart->Init.WordLength == USART_WORDLENGTH_9B) && (husart->Init.Parity == USART_PARITY_NONE))
+ {
+ prxdata8bits = NULL;
+ prxdata16bits = (uint16_t *) pRxData;
+ }
+ else
+ {
+ prxdata8bits = pRxData;
+ prxdata16bits = NULL;
+ }
+
+ /* as long as data have to be received */
+ while (husart->RxXferCount > 0U)
+ {
+ if (husart->SlaveMode == USART_SLAVEMODE_DISABLE)
+ {
+ /* Wait until TXE flag is set to send dummy byte in order to generate the
+ * clock for the slave to send data.
+ * Whatever the frame length (7, 8 or 9-bit long), the same dummy value
+ * can be written for all the cases. */
+ if (USART_WaitOnFlagUntilTimeout(husart, USART_FLAG_TXE, RESET, tickstart, Timeout) != HAL_OK)
+ {
+ return HAL_TIMEOUT;
+ }
+ husart->Instance->TDR = (USART_DUMMY_DATA & (uint16_t)0x0FF);
+ }
+
+ /* Wait for RXNE Flag */
+ if (USART_WaitOnFlagUntilTimeout(husart, USART_FLAG_RXNE, RESET, tickstart, Timeout) != HAL_OK)
+ {
+ return HAL_TIMEOUT;
+ }
+
+ if (prxdata8bits == NULL)
+ {
+ *prxdata16bits = (uint16_t)(husart->Instance->RDR & uhMask);
+ prxdata16bits++;
+ }
+ else
+ {
+ *prxdata8bits = (uint8_t)(husart->Instance->RDR & (uint8_t)(uhMask & 0xFFU));
+ prxdata8bits++;
+ }
+
+ husart->RxXferCount--;
+
+ }
+
+ /* Clear SPI slave underrun flag and discard transmit data */
+ if (husart->SlaveMode == USART_SLAVEMODE_ENABLE)
+ {
+ __HAL_USART_CLEAR_UDRFLAG(husart);
+ __HAL_USART_SEND_REQ(husart, USART_TXDATA_FLUSH_REQUEST);
+ }
+
+ /* At end of Rx process, restore husart->State to Ready */
+ husart->State = HAL_USART_STATE_READY;
+
+ /* Process Unlocked */
+ __HAL_UNLOCK(husart);
+
+ return HAL_OK;
+ }
+ else
+ {
+ return HAL_BUSY;
+ }
+}
+
+/**
+ * @brief Full-Duplex Send and Receive an amount of data in blocking mode.
+ * @note When UART parity is not enabled (PCE = 0), and Word Length is configured to 9 bits (M1-M0 = 01),
+ * the sent data and the received data are handled as sets of u16. In this case, Size must indicate the number
+ * of u16 available through pTxData and through pRxData.
+ * @param husart USART handle.
+ * @param pTxData pointer to TX data buffer (u8 or u16 data elements).
+ * @param pRxData pointer to RX data buffer (u8 or u16 data elements).
+ * @param Size amount of data elements (u8 or u16) to be sent (same amount to be received).
+ * @param Timeout Timeout duration.
+ * @retval HAL status
+ */
+HAL_StatusTypeDef HAL_USART_TransmitReceive(USART_HandleTypeDef *husart, uint8_t *pTxData, uint8_t *pRxData,
+ uint16_t Size, uint32_t Timeout)
+{
+ uint8_t *prxdata8bits;
+ uint16_t *prxdata16bits;
+ uint8_t *ptxdata8bits;
+ uint16_t *ptxdata16bits;
+ uint16_t uhMask;
+ uint16_t rxdatacount;
+ uint32_t tickstart;
+
+ if (husart->State == HAL_USART_STATE_READY)
+ {
+ if ((pTxData == NULL) || (pRxData == NULL) || (Size == 0U))
+ {
+ return HAL_ERROR;
+ }
+
+ /* Process Locked */
+ __HAL_LOCK(husart);
+
+ husart->ErrorCode = HAL_USART_ERROR_NONE;
+ husart->State = HAL_USART_STATE_BUSY_RX;
+
+ /* Init tickstart for timeout managment*/
+ tickstart = HAL_GetTick();
+
+ husart->RxXferSize = Size;
+ husart->TxXferSize = Size;
+ husart->TxXferCount = Size;
+ husart->RxXferCount = Size;
+
+ /* Computation of USART mask to apply to RDR register */
+ USART_MASK_COMPUTATION(husart);
+ uhMask = husart->Mask;
+
+ /* In case of 9bits/No Parity transfer, pRxData needs to be handled as a uint16_t pointer */
+ if ((husart->Init.WordLength == USART_WORDLENGTH_9B) && (husart->Init.Parity == USART_PARITY_NONE))
+ {
+ prxdata8bits = NULL;
+ ptxdata8bits = NULL;
+ ptxdata16bits = (uint16_t *) pTxData;
+ prxdata16bits = (uint16_t *) pRxData;
+ }
+ else
+ {
+ prxdata8bits = pRxData;
+ ptxdata8bits = pTxData;
+ ptxdata16bits = NULL;
+ prxdata16bits = NULL;
+ }
+
+ if ((husart->TxXferCount == 0x01U) || (husart->SlaveMode == USART_SLAVEMODE_ENABLE))
+ {
+ /* Wait until TXE flag is set to send data */
+ if (USART_WaitOnFlagUntilTimeout(husart, USART_FLAG_TXE, RESET, tickstart, Timeout) != HAL_OK)
+ {
+ return HAL_TIMEOUT;
+ }
+ if (ptxdata8bits == NULL)
+ {
+ husart->Instance->TDR = (uint16_t)(*ptxdata16bits & uhMask);
+ ptxdata16bits++;
+ }
+ else
+ {
+ husart->Instance->TDR = (uint8_t)(*ptxdata8bits & (uint8_t)(uhMask & 0xFFU));
+ ptxdata8bits++;
+ }
+
+ husart->TxXferCount--;
+ }
+
+ /* Check the remain data to be sent */
+ /* rxdatacount is a temporary variable for MISRAC2012-Rule-13.5 */
+ rxdatacount = husart->RxXferCount;
+ while ((husart->TxXferCount > 0U) || (rxdatacount > 0U))
+ {
+ if (husart->TxXferCount > 0U)
+ {
+ /* Wait until TXE flag is set to send data */
+ if (USART_WaitOnFlagUntilTimeout(husart, USART_FLAG_TXE, RESET, tickstart, Timeout) != HAL_OK)
+ {
+ return HAL_TIMEOUT;
+ }
+ if (ptxdata8bits == NULL)
+ {
+ husart->Instance->TDR = (uint16_t)(*ptxdata16bits & uhMask);
+ ptxdata16bits++;
+ }
+ else
+ {
+ husart->Instance->TDR = (uint8_t)(*ptxdata8bits & (uint8_t)(uhMask & 0xFFU));
+ ptxdata8bits++;
+ }
+
+ husart->TxXferCount--;
+ }
+
+ if (husart->RxXferCount > 0U)
+ {
+ /* Wait for RXNE Flag */
+ if (USART_WaitOnFlagUntilTimeout(husart, USART_FLAG_RXNE, RESET, tickstart, Timeout) != HAL_OK)
+ {
+ return HAL_TIMEOUT;
+ }
+
+ if (prxdata8bits == NULL)
+ {
+ *prxdata16bits = (uint16_t)(husart->Instance->RDR & uhMask);
+ prxdata16bits++;
+ }
+ else
+ {
+ *prxdata8bits = (uint8_t)(husart->Instance->RDR & (uint8_t)(uhMask & 0xFFU));
+ prxdata8bits++;
+ }
+
+ husart->RxXferCount--;
+ }
+ rxdatacount = husart->RxXferCount;
+ }
+
+ /* At end of TxRx process, restore husart->State to Ready */
+ husart->State = HAL_USART_STATE_READY;
+
+ /* Process Unlocked */
+ __HAL_UNLOCK(husart);
+
+ return HAL_OK;
+ }
+ else
+ {
+ return HAL_BUSY;
+ }
+}
+
+/**
+ * @brief Send an amount of data in interrupt mode.
+ * @note When UART parity is not enabled (PCE = 0), and Word Length is configured to 9 bits (M1-M0 = 01),
+ * the sent data is handled as a set of u16. In this case, Size must indicate the number
+ * of u16 provided through pTxData.
+ * @param husart USART handle.
+ * @param pTxData pointer to data buffer (u8 or u16 data elements).
+ * @param Size amount of data elements (u8 or u16) to be sent.
+ * @retval HAL status
+ */
+HAL_StatusTypeDef HAL_USART_Transmit_IT(USART_HandleTypeDef *husart, uint8_t *pTxData, uint16_t Size)
+{
+ if (husart->State == HAL_USART_STATE_READY)
+ {
+ if ((pTxData == NULL) || (Size == 0U))
+ {
+ return HAL_ERROR;
+ }
+
+ /* Process Locked */
+ __HAL_LOCK(husart);
+
+ husart->pTxBuffPtr = pTxData;
+ husart->TxXferSize = Size;
+ husart->TxXferCount = Size;
+ husart->TxISR = NULL;
+
+ husart->ErrorCode = HAL_USART_ERROR_NONE;
+ husart->State = HAL_USART_STATE_BUSY_TX;
+
+ /* The USART Error Interrupts: (Frame error, noise error, overrun error)
+ are not managed by the USART Transmit Process to avoid the overrun interrupt
+ when the usart mode is configured for transmit and receive "USART_MODE_TX_RX"
+ to benefit for the frame error and noise interrupts the usart mode should be
+ configured only for transmit "USART_MODE_TX" */
+
+ /* Configure Tx interrupt processing */
+ if (husart->FifoMode == USART_FIFOMODE_ENABLE)
+ {
+ /* Set the Tx ISR function pointer according to the data word length */
+ if ((husart->Init.WordLength == USART_WORDLENGTH_9B) && (husart->Init.Parity == USART_PARITY_NONE))
+ {
+ husart->TxISR = USART_TxISR_16BIT_FIFOEN;
+ }
+ else
+ {
+ husart->TxISR = USART_TxISR_8BIT_FIFOEN;
+ }
+
+ /* Process Unlocked */
+ __HAL_UNLOCK(husart);
+
+ /* Enable the TX FIFO threshold interrupt */
+ __HAL_USART_ENABLE_IT(husart, USART_IT_TXFT);
+ }
+ else
+ {
+ /* Set the Tx ISR function pointer according to the data word length */
+ if ((husart->Init.WordLength == USART_WORDLENGTH_9B) && (husart->Init.Parity == USART_PARITY_NONE))
+ {
+ husart->TxISR = USART_TxISR_16BIT;
+ }
+ else
+ {
+ husart->TxISR = USART_TxISR_8BIT;
+ }
+
+ /* Process Unlocked */
+ __HAL_UNLOCK(husart);
+
+ /* Enable the USART Transmit Data Register Empty Interrupt */
+ __HAL_USART_ENABLE_IT(husart, USART_IT_TXE);
+ }
+
+ return HAL_OK;
+ }
+ else
+ {
+ return HAL_BUSY;
+ }
+}
+
+/**
+ * @brief Receive an amount of data in interrupt mode.
+ * @note To receive synchronous data, dummy data are simultaneously transmitted.
+ * @note When UART parity is not enabled (PCE = 0), and Word Length is configured to 9 bits (M1-M0 = 01),
+ * the received data is handled as a set of u16. In this case, Size must indicate the number
+ * of u16 available through pRxData.
+ * @param husart USART handle.
+ * @param pRxData pointer to data buffer (u8 or u16 data elements).
+ * @param Size amount of data elements (u8 or u16) to be received.
+ * @retval HAL status
+ */
+HAL_StatusTypeDef HAL_USART_Receive_IT(USART_HandleTypeDef *husart, uint8_t *pRxData, uint16_t Size)
+{
+ uint16_t nb_dummy_data;
+
+ if (husart->State == HAL_USART_STATE_READY)
+ {
+ if ((pRxData == NULL) || (Size == 0U))
+ {
+ return HAL_ERROR;
+ }
+
+ /* Process Locked */
+ __HAL_LOCK(husart);
+
+ husart->pRxBuffPtr = pRxData;
+ husart->RxXferSize = Size;
+ husart->RxXferCount = Size;
+ husart->RxISR = NULL;
+
+ USART_MASK_COMPUTATION(husart);
+
+ husart->ErrorCode = HAL_USART_ERROR_NONE;
+ husart->State = HAL_USART_STATE_BUSY_RX;
+
+ /* Enable the USART Error Interrupt: (Frame error, noise error, overrun error) */
+ SET_BIT(husart->Instance->CR3, USART_CR3_EIE);
+
+ /* Configure Rx interrupt processing */
+ if ((husart->FifoMode == USART_FIFOMODE_ENABLE) && (Size >= husart->NbRxDataToProcess))
+ {
+ /* Set the Rx ISR function pointer according to the data word length */
+ if ((husart->Init.WordLength == USART_WORDLENGTH_9B) && (husart->Init.Parity == USART_PARITY_NONE))
+ {
+ husart->RxISR = USART_RxISR_16BIT_FIFOEN;
+ }
+ else
+ {
+ husart->RxISR = USART_RxISR_8BIT_FIFOEN;
+ }
+
+ /* Process Unlocked */
+ __HAL_UNLOCK(husart);
+
+ /* Enable the USART Parity Error interrupt and RX FIFO Threshold interrupt */
+ SET_BIT(husart->Instance->CR1, USART_CR1_PEIE);
+ SET_BIT(husart->Instance->CR3, USART_CR3_RXFTIE);
+ }
+ else
+ {
+ /* Set the Rx ISR function pointer according to the data word length */
+ if ((husart->Init.WordLength == USART_WORDLENGTH_9B) && (husart->Init.Parity == USART_PARITY_NONE))
+ {
+ husart->RxISR = USART_RxISR_16BIT;
+ }
+ else
+ {
+ husart->RxISR = USART_RxISR_8BIT;
+ }
+
+ /* Process Unlocked */
+ __HAL_UNLOCK(husart);
+
+ /* Enable the USART Parity Error and Data Register not empty Interrupts */
+ SET_BIT(husart->Instance->CR1, USART_CR1_PEIE | USART_CR1_RXNEIE_RXFNEIE);
+ }
+
+ if (husart->SlaveMode == USART_SLAVEMODE_DISABLE)
+ {
+ /* Send dummy data in order to generate the clock for the Slave to send the next data.
+ When FIFO mode is disabled only one data must be transferred.
+ When FIFO mode is enabled data must be transmitted until the RX FIFO reaches its threshold.
+ */
+ if ((husart->FifoMode == USART_FIFOMODE_ENABLE) && (Size >= husart->NbRxDataToProcess))
+ {
+ for (nb_dummy_data = husart->NbRxDataToProcess ; nb_dummy_data > 0U ; nb_dummy_data--)
+ {
+ husart->Instance->TDR = (USART_DUMMY_DATA & (uint16_t)0x00FF);
+ }
+ }
+ else
+ {
+ husart->Instance->TDR = (USART_DUMMY_DATA & (uint16_t)0x00FF);
+ }
+ }
+
+ return HAL_OK;
+ }
+ else
+ {
+ return HAL_BUSY;
+ }
+}
+
+/**
+ * @brief Full-Duplex Send and Receive an amount of data in interrupt mode.
+ * @note When UART parity is not enabled (PCE = 0), and Word Length is configured to 9 bits (M1-M0 = 01),
+ * the sent data and the received data are handled as sets of u16. In this case, Size must indicate the number
+ * of u16 available through pTxData and through pRxData.
+ * @param husart USART handle.
+ * @param pTxData pointer to TX data buffer (u8 or u16 data elements).
+ * @param pRxData pointer to RX data buffer (u8 or u16 data elements).
+ * @param Size amount of data elements (u8 or u16) to be sent (same amount to be received).
+ * @retval HAL status
+ */
+HAL_StatusTypeDef HAL_USART_TransmitReceive_IT(USART_HandleTypeDef *husart, uint8_t *pTxData, uint8_t *pRxData,
+ uint16_t Size)
+{
+
+ if (husart->State == HAL_USART_STATE_READY)
+ {
+ if ((pTxData == NULL) || (pRxData == NULL) || (Size == 0U))
+ {
+ return HAL_ERROR;
+ }
+
+ /* Process Locked */
+ __HAL_LOCK(husart);
+
+ husart->pRxBuffPtr = pRxData;
+ husart->RxXferSize = Size;
+ husart->RxXferCount = Size;
+ husart->pTxBuffPtr = pTxData;
+ husart->TxXferSize = Size;
+ husart->TxXferCount = Size;
+
+ /* Computation of USART mask to apply to RDR register */
+ USART_MASK_COMPUTATION(husart);
+
+ husart->ErrorCode = HAL_USART_ERROR_NONE;
+ husart->State = HAL_USART_STATE_BUSY_TX_RX;
+
+ /* Configure TxRx interrupt processing */
+ if ((husart->FifoMode == USART_FIFOMODE_ENABLE) && (Size >= husart->NbRxDataToProcess))
+ {
+ /* Set the Rx ISR function pointer according to the data word length */
+ if ((husart->Init.WordLength == USART_WORDLENGTH_9B) && (husart->Init.Parity == USART_PARITY_NONE))
+ {
+ husart->TxISR = USART_TxISR_16BIT_FIFOEN;
+ husart->RxISR = USART_RxISR_16BIT_FIFOEN;
+ }
+ else
+ {
+ husart->TxISR = USART_TxISR_8BIT_FIFOEN;
+ husart->RxISR = USART_RxISR_8BIT_FIFOEN;
+ }
+
+ /* Process Locked */
+ __HAL_UNLOCK(husart);
+
+ /* Enable the USART Error Interrupt: (Frame error, noise error, overrun error) */
+ SET_BIT(husart->Instance->CR3, USART_CR3_EIE);
+
+ /* Enable the USART Parity Error interrupt */
+ SET_BIT(husart->Instance->CR1, USART_CR1_PEIE);
+
+ /* Enable the TX and RX FIFO Threshold interrupts */
+ SET_BIT(husart->Instance->CR3, (USART_CR3_TXFTIE | USART_CR3_RXFTIE));
+ }
+ else
+ {
+ if ((husart->Init.WordLength == USART_WORDLENGTH_9B) && (husart->Init.Parity == USART_PARITY_NONE))
+ {
+ husart->TxISR = USART_TxISR_16BIT;
+ husart->RxISR = USART_RxISR_16BIT;
+ }
+ else
+ {
+ husart->TxISR = USART_TxISR_8BIT;
+ husart->RxISR = USART_RxISR_8BIT;
+ }
+
+ /* Process Locked */
+ __HAL_UNLOCK(husart);
+
+ /* Enable the USART Error Interrupt: (Frame error, noise error, overrun error) */
+ SET_BIT(husart->Instance->CR3, USART_CR3_EIE);
+
+ /* Enable the USART Parity Error and USART Data Register not empty Interrupts */
+ SET_BIT(husart->Instance->CR1, USART_CR1_PEIE | USART_CR1_RXNEIE_RXFNEIE);
+
+ /* Enable the USART Transmit Data Register Empty Interrupt */
+ SET_BIT(husart->Instance->CR1, USART_CR1_TXEIE_TXFNFIE);
+ }
+
+ return HAL_OK;
+ }
+ else
+ {
+ return HAL_BUSY;
+ }
+}
+
+/**
+ * @brief Send an amount of data in DMA mode.
+ * @note When UART parity is not enabled (PCE = 0), and Word Length is configured to 9 bits (M1-M0 = 01),
+ * the sent data is handled as a set of u16. In this case, Size must indicate the number
+ * of u16 provided through pTxData.
+ * @param husart USART handle.
+ * @param pTxData pointer to data buffer (u8 or u16 data elements).
+ * @param Size amount of data elements (u8 or u16) to be sent.
+ * @retval HAL status
+ */
+HAL_StatusTypeDef HAL_USART_Transmit_DMA(USART_HandleTypeDef *husart, uint8_t *pTxData, uint16_t Size)
+{
+ HAL_StatusTypeDef status = HAL_OK;
+ uint32_t *tmp;
+
+ if (husart->State == HAL_USART_STATE_READY)
+ {
+ if ((pTxData == NULL) || (Size == 0U))
+ {
+ return HAL_ERROR;
+ }
+
+ /* Process Locked */
+ __HAL_LOCK(husart);
+
+ husart->pTxBuffPtr = pTxData;
+ husart->TxXferSize = Size;
+ husart->TxXferCount = Size;
+
+ husart->ErrorCode = HAL_USART_ERROR_NONE;
+ husart->State = HAL_USART_STATE_BUSY_TX;
+
+ if (husart->hdmatx != NULL)
+ {
+ /* Set the USART DMA transfer complete callback */
+ husart->hdmatx->XferCpltCallback = USART_DMATransmitCplt;
+
+ /* Set the USART DMA Half transfer complete callback */
+ husart->hdmatx->XferHalfCpltCallback = USART_DMATxHalfCplt;
+
+ /* Set the DMA error callback */
+ husart->hdmatx->XferErrorCallback = USART_DMAError;
+
+ /* Enable the USART transmit DMA channel */
+ tmp = (uint32_t *)&pTxData;
+ status = HAL_DMA_Start_IT(husart->hdmatx, *(uint32_t *)tmp, (uint32_t)&husart->Instance->TDR, Size);
+ }
+
+ if (status == HAL_OK)
+ {
+ /* Clear the TC flag in the ICR register */
+ __HAL_USART_CLEAR_FLAG(husart, USART_CLEAR_TCF);
+
+ /* Process Unlocked */
+ __HAL_UNLOCK(husart);
+
+ /* Enable the DMA transfer for transmit request by setting the DMAT bit
+ in the USART CR3 register */
+ SET_BIT(husart->Instance->CR3, USART_CR3_DMAT);
+
+ return HAL_OK;
+ }
+ else
+ {
+ /* Set error code to DMA */
+ husart->ErrorCode = HAL_USART_ERROR_DMA;
+
+ /* Process Unlocked */
+ __HAL_UNLOCK(husart);
+
+ /* Restore husart->State to ready */
+ husart->State = HAL_USART_STATE_READY;
+
+ return HAL_ERROR;
+ }
+ }
+ else
+ {
+ return HAL_BUSY;
+ }
+}
+
+/**
+ * @brief Receive an amount of data in DMA mode.
+ * @note When the USART parity is enabled (PCE = 1), the received data contain
+ * the parity bit (MSB position).
+ * @note The USART DMA transmit channel must be configured in order to generate the clock for the slave.
+ * @note When UART parity is not enabled (PCE = 0), and Word Length is configured to 9 bits (M1-M0 = 01),
+ * the received data is handled as a set of u16. In this case, Size must indicate the number
+ * of u16 available through pRxData.
+ * @param husart USART handle.
+ * @param pRxData pointer to data buffer (u8 or u16 data elements).
+ * @param Size amount of data elements (u8 or u16) to be received.
+ * @retval HAL status
+ */
+HAL_StatusTypeDef HAL_USART_Receive_DMA(USART_HandleTypeDef *husart, uint8_t *pRxData, uint16_t Size)
+{
+ HAL_StatusTypeDef status = HAL_OK;
+ uint32_t *tmp = (uint32_t *)&pRxData;
+
+ /* Check that a Rx process is not already ongoing */
+ if (husart->State == HAL_USART_STATE_READY)
+ {
+ if ((pRxData == NULL) || (Size == 0U))
+ {
+ return HAL_ERROR;
+ }
+
+ /* Process Locked */
+ __HAL_LOCK(husart);
+
+ husart->pRxBuffPtr = pRxData;
+ husart->RxXferSize = Size;
+ husart->pTxBuffPtr = pRxData;
+ husart->TxXferSize = Size;
+
+ husart->ErrorCode = HAL_USART_ERROR_NONE;
+ husart->State = HAL_USART_STATE_BUSY_RX;
+
+ if (husart->hdmarx != NULL)
+ {
+ /* Set the USART DMA Rx transfer complete callback */
+ husart->hdmarx->XferCpltCallback = USART_DMAReceiveCplt;
+
+ /* Set the USART DMA Half transfer complete callback */
+ husart->hdmarx->XferHalfCpltCallback = USART_DMARxHalfCplt;
+
+ /* Set the USART DMA Rx transfer error callback */
+ husart->hdmarx->XferErrorCallback = USART_DMAError;
+
+ /* Enable the USART receive DMA channel */
+ status = HAL_DMA_Start_IT(husart->hdmarx, (uint32_t)&husart->Instance->RDR, *(uint32_t *)tmp, Size);
+ }
+
+ if ((status == HAL_OK) &&
+ (husart->SlaveMode == USART_SLAVEMODE_DISABLE))
+ {
+ /* Enable the USART transmit DMA channel: the transmit channel is used in order
+ to generate in the non-blocking mode the clock to the slave device,
+ this mode isn't a simplex receive mode but a full-duplex receive mode */
+
+ /* Set the USART DMA Tx Complete and Error callback to Null */
+ if (husart->hdmatx != NULL)
+ {
+ husart->hdmatx->XferErrorCallback = NULL;
+ husart->hdmatx->XferHalfCpltCallback = NULL;
+ husart->hdmatx->XferCpltCallback = NULL;
+ status = HAL_DMA_Start_IT(husart->hdmatx, *(uint32_t *)tmp, (uint32_t)&husart->Instance->TDR, Size);
+ }
+ }
+
+ if (status == HAL_OK)
+ {
+ /* Process Unlocked */
+ __HAL_UNLOCK(husart);
+
+ /* Enable the USART Parity Error Interrupt */
+ SET_BIT(husart->Instance->CR1, USART_CR1_PEIE);
+
+ /* Enable the USART Error Interrupt: (Frame error, noise error, overrun error) */
+ SET_BIT(husart->Instance->CR3, USART_CR3_EIE);
+
+ /* Enable the DMA transfer for the receiver request by setting the DMAR bit
+ in the USART CR3 register */
+ SET_BIT(husart->Instance->CR3, USART_CR3_DMAR);
+
+ /* Enable the DMA transfer for transmit request by setting the DMAT bit
+ in the USART CR3 register */
+ SET_BIT(husart->Instance->CR3, USART_CR3_DMAT);
+
+ return HAL_OK;
+ }
+ else
+ {
+ if (husart->hdmarx != NULL)
+ {
+ status = HAL_DMA_Abort(husart->hdmarx);
+ }
+
+ /* No need to check on error code */
+ UNUSED(status);
+
+ /* Set error code to DMA */
+ husart->ErrorCode = HAL_USART_ERROR_DMA;
+
+ /* Process Unlocked */
+ __HAL_UNLOCK(husart);
+
+ /* Restore husart->State to ready */
+ husart->State = HAL_USART_STATE_READY;
+
+ return HAL_ERROR;
+ }
+ }
+ else
+ {
+ return HAL_BUSY;
+ }
+}
+
+/**
+ * @brief Full-Duplex Transmit Receive an amount of data in non-blocking mode.
+ * @note When the USART parity is enabled (PCE = 1) the data received contain the parity bit.
+ * @note When UART parity is not enabled (PCE = 0), and Word Length is configured to 9 bits (M1-M0 = 01),
+ * the sent data and the received data are handled as sets of u16. In this case, Size must indicate the number
+ * of u16 available through pTxData and through pRxData.
+ * @param husart USART handle.
+ * @param pTxData pointer to TX data buffer (u8 or u16 data elements).
+ * @param pRxData pointer to RX data buffer (u8 or u16 data elements).
+ * @param Size amount of data elements (u8 or u16) to be received/sent.
+ * @retval HAL status
+ */
+HAL_StatusTypeDef HAL_USART_TransmitReceive_DMA(USART_HandleTypeDef *husart, uint8_t *pTxData, uint8_t *pRxData,
+ uint16_t Size)
+{
+ HAL_StatusTypeDef status;
+ uint32_t *tmp;
+
+ if (husart->State == HAL_USART_STATE_READY)
+ {
+ if ((pTxData == NULL) || (pRxData == NULL) || (Size == 0U))
+ {
+ return HAL_ERROR;
+ }
+
+ /* Process Locked */
+ __HAL_LOCK(husart);
+
+ husart->pRxBuffPtr = pRxData;
+ husart->RxXferSize = Size;
+ husart->pTxBuffPtr = pTxData;
+ husart->TxXferSize = Size;
+
+ husart->ErrorCode = HAL_USART_ERROR_NONE;
+ husart->State = HAL_USART_STATE_BUSY_TX_RX;
+
+ if ((husart->hdmarx != NULL) && (husart->hdmatx != NULL))
+ {
+ /* Set the USART DMA Rx transfer complete callback */
+ husart->hdmarx->XferCpltCallback = USART_DMAReceiveCplt;
+
+ /* Set the USART DMA Half transfer complete callback */
+ husart->hdmarx->XferHalfCpltCallback = USART_DMARxHalfCplt;
+
+ /* Set the USART DMA Tx transfer complete callback */
+ husart->hdmatx->XferCpltCallback = USART_DMATransmitCplt;
+
+ /* Set the USART DMA Half transfer complete callback */
+ husart->hdmatx->XferHalfCpltCallback = USART_DMATxHalfCplt;
+
+ /* Set the USART DMA Tx transfer error callback */
+ husart->hdmatx->XferErrorCallback = USART_DMAError;
+
+ /* Set the USART DMA Rx transfer error callback */
+ husart->hdmarx->XferErrorCallback = USART_DMAError;
+
+ /* Enable the USART receive DMA channel */
+ tmp = (uint32_t *)&pRxData;
+ status = HAL_DMA_Start_IT(husart->hdmarx, (uint32_t)&husart->Instance->RDR, *(uint32_t *)tmp, Size);
+
+ /* Enable the USART transmit DMA channel */
+ if (status == HAL_OK)
+ {
+ tmp = (uint32_t *)&pTxData;
+ status = HAL_DMA_Start_IT(husart->hdmatx, *(uint32_t *)tmp, (uint32_t)&husart->Instance->TDR, Size);
+ }
+ }
+ else
+ {
+ status = HAL_ERROR;
+ }
+
+ if (status == HAL_OK)
+ {
+ /* Process Unlocked */
+ __HAL_UNLOCK(husart);
+
+ /* Enable the USART Parity Error Interrupt */
+ SET_BIT(husart->Instance->CR1, USART_CR1_PEIE);
+
+ /* Enable the USART Error Interrupt: (Frame error, noise error, overrun error) */
+ SET_BIT(husart->Instance->CR3, USART_CR3_EIE);
+
+ /* Clear the TC flag in the ICR register */
+ __HAL_USART_CLEAR_FLAG(husart, USART_CLEAR_TCF);
+
+ /* Enable the DMA transfer for the receiver request by setting the DMAR bit
+ in the USART CR3 register */
+ SET_BIT(husart->Instance->CR3, USART_CR3_DMAR);
+
+ /* Enable the DMA transfer for transmit request by setting the DMAT bit
+ in the USART CR3 register */
+ SET_BIT(husart->Instance->CR3, USART_CR3_DMAT);
+
+ return HAL_OK;
+ }
+ else
+ {
+ if (husart->hdmarx != NULL)
+ {
+ status = HAL_DMA_Abort(husart->hdmarx);
+ }
+
+ /* No need to check on error code */
+ UNUSED(status);
+
+ /* Set error code to DMA */
+ husart->ErrorCode = HAL_USART_ERROR_DMA;
+
+ /* Process Unlocked */
+ __HAL_UNLOCK(husart);
+
+ /* Restore husart->State to ready */
+ husart->State = HAL_USART_STATE_READY;
+
+ return HAL_ERROR;
+ }
+ }
+ else
+ {
+ return HAL_BUSY;
+ }
+}
+
+/**
+ * @brief Pause the DMA Transfer.
+ * @param husart USART handle.
+ * @retval HAL status
+ */
+HAL_StatusTypeDef HAL_USART_DMAPause(USART_HandleTypeDef *husart)
+{
+ const HAL_USART_StateTypeDef state = husart->State;
+
+ /* Process Locked */
+ __HAL_LOCK(husart);
+
+ if ((HAL_IS_BIT_SET(husart->Instance->CR3, USART_CR3_DMAT)) &&
+ (state == HAL_USART_STATE_BUSY_TX))
+ {
+ /* Disable the USART DMA Tx request */
+ CLEAR_BIT(husart->Instance->CR3, USART_CR3_DMAT);
+ }
+ else if ((state == HAL_USART_STATE_BUSY_RX) ||
+ (state == HAL_USART_STATE_BUSY_TX_RX))
+ {
+ if (HAL_IS_BIT_SET(husart->Instance->CR3, USART_CR3_DMAT))
+ {
+ /* Disable the USART DMA Tx request */
+ CLEAR_BIT(husart->Instance->CR3, USART_CR3_DMAT);
+ }
+ if (HAL_IS_BIT_SET(husart->Instance->CR3, USART_CR3_DMAR))
+ {
+ /* Disable PE and ERR (Frame error, noise error, overrun error) interrupts */
+ CLEAR_BIT(husart->Instance->CR1, USART_CR1_PEIE);
+ CLEAR_BIT(husart->Instance->CR3, USART_CR3_EIE);
+
+ /* Disable the USART DMA Rx request */
+ CLEAR_BIT(husart->Instance->CR3, USART_CR3_DMAR);
+ }
+ }
+ else
+ {
+ /* Nothing to do */
+ }
+
+ /* Process Unlocked */
+ __HAL_UNLOCK(husart);
+
+ return HAL_OK;
+}
+
+/**
+ * @brief Resume the DMA Transfer.
+ * @param husart USART handle.
+ * @retval HAL status
+ */
+HAL_StatusTypeDef HAL_USART_DMAResume(USART_HandleTypeDef *husart)
+{
+ const HAL_USART_StateTypeDef state = husart->State;
+
+ /* Process Locked */
+ __HAL_LOCK(husart);
+
+ if (state == HAL_USART_STATE_BUSY_TX)
+ {
+ /* Enable the USART DMA Tx request */
+ SET_BIT(husart->Instance->CR3, USART_CR3_DMAT);
+ }
+ else if ((state == HAL_USART_STATE_BUSY_RX) ||
+ (state == HAL_USART_STATE_BUSY_TX_RX))
+ {
+ /* Clear the Overrun flag before resuming the Rx transfer*/
+ __HAL_USART_CLEAR_FLAG(husart, USART_CLEAR_OREF);
+
+ /* Reenable PE and ERR (Frame error, noise error, overrun error) interrupts */
+ SET_BIT(husart->Instance->CR1, USART_CR1_PEIE);
+ SET_BIT(husart->Instance->CR3, USART_CR3_EIE);
+
+ /* Enable the USART DMA Rx request before the DMA Tx request */
+ SET_BIT(husart->Instance->CR3, USART_CR3_DMAR);
+
+ /* Enable the USART DMA Tx request */
+ SET_BIT(husart->Instance->CR3, USART_CR3_DMAT);
+ }
+ else
+ {
+ /* Nothing to do */
+ }
+
+ /* Process Unlocked */
+ __HAL_UNLOCK(husart);
+
+ return HAL_OK;
+}
+
+/**
+ * @brief Stop the DMA Transfer.
+ * @param husart USART handle.
+ * @retval HAL status
+ */
+HAL_StatusTypeDef HAL_USART_DMAStop(USART_HandleTypeDef *husart)
+{
+ /* The Lock is not implemented on this API to allow the user application
+ to call the HAL USART API under callbacks HAL_USART_TxCpltCallback() / HAL_USART_RxCpltCallback() /
+ HAL_USART_TxHalfCpltCallback / HAL_USART_RxHalfCpltCallback:
+ indeed, when HAL_DMA_Abort() API is called, the DMA TX/RX Transfer or Half Transfer complete
+ interrupt is generated if the DMA transfer interruption occurs at the middle or at the end of
+ the stream and the corresponding call back is executed. */
+
+ /* Disable the USART Tx/Rx DMA requests */
+ CLEAR_BIT(husart->Instance->CR3, USART_CR3_DMAT);
+ CLEAR_BIT(husart->Instance->CR3, USART_CR3_DMAR);
+
+ /* Abort the USART DMA tx channel */
+ if (husart->hdmatx != NULL)
+ {
+ if (HAL_DMA_Abort(husart->hdmatx) != HAL_OK)
+ {
+ if (HAL_DMA_GetError(husart->hdmatx) == HAL_DMA_ERROR_TIMEOUT)
+ {
+ /* Set error code to DMA */
+ husart->ErrorCode = HAL_USART_ERROR_DMA;
+
+ return HAL_TIMEOUT;
+ }
+ }
+ }
+ /* Abort the USART DMA rx channel */
+ if (husart->hdmarx != NULL)
+ {
+ if (HAL_DMA_Abort(husart->hdmarx) != HAL_OK)
+ {
+ if (HAL_DMA_GetError(husart->hdmarx) == HAL_DMA_ERROR_TIMEOUT)
+ {
+ /* Set error code to DMA */
+ husart->ErrorCode = HAL_USART_ERROR_DMA;
+
+ return HAL_TIMEOUT;
+ }
+ }
+ }
+
+ USART_EndTransfer(husart);
+ husart->State = HAL_USART_STATE_READY;
+
+ return HAL_OK;
+}
+
+/**
+ * @brief Abort ongoing transfers (blocking mode).
+ * @param husart USART handle.
+ * @note This procedure could be used for aborting any ongoing transfer started in Interrupt or DMA mode.
+ * This procedure performs following operations :
+ * - Disable USART Interrupts (Tx and Rx)
+ * - Disable the DMA transfer in the peripheral register (if enabled)
+ * - Abort DMA transfer by calling HAL_DMA_Abort (in case of transfer in DMA mode)
+ * - Set handle State to READY
+ * @note This procedure is executed in blocking mode : when exiting function, Abort is considered as completed.
+ * @retval HAL status
+ */
+HAL_StatusTypeDef HAL_USART_Abort(USART_HandleTypeDef *husart)
+{
+ /* Disable TXEIE, TCIE, RXNE, RXFT, TXFT, PE and ERR (Frame error, noise error, overrun error) interrupts */
+ CLEAR_BIT(husart->Instance->CR1, (USART_CR1_RXNEIE_RXFNEIE | USART_CR1_PEIE | USART_CR1_TXEIE_TXFNFIE |
+ USART_CR1_TCIE));
+ CLEAR_BIT(husart->Instance->CR3, (USART_CR3_EIE | USART_CR3_RXFTIE | USART_CR3_TXFTIE));
+
+ /* Disable the USART DMA Tx request if enabled */
+ if (HAL_IS_BIT_SET(husart->Instance->CR3, USART_CR3_DMAT))
+ {
+ CLEAR_BIT(husart->Instance->CR3, USART_CR3_DMAT);
+
+ /* Abort the USART DMA Tx channel : use blocking DMA Abort API (no callback) */
+ if (husart->hdmatx != NULL)
+ {
+ /* Set the USART DMA Abort callback to Null.
+ No call back execution at end of DMA abort procedure */
+ husart->hdmatx->XferAbortCallback = NULL;
+
+ if (HAL_DMA_Abort(husart->hdmatx) != HAL_OK)
+ {
+ if (HAL_DMA_GetError(husart->hdmatx) == HAL_DMA_ERROR_TIMEOUT)
+ {
+ /* Set error code to DMA */
+ husart->ErrorCode = HAL_USART_ERROR_DMA;
+
+ return HAL_TIMEOUT;
+ }
+ }
+ }
+ }
+
+ /* Disable the USART DMA Rx request if enabled */
+ if (HAL_IS_BIT_SET(husart->Instance->CR3, USART_CR3_DMAR))
+ {
+ CLEAR_BIT(husart->Instance->CR3, USART_CR3_DMAR);
+
+ /* Abort the USART DMA Rx channel : use blocking DMA Abort API (no callback) */
+ if (husart->hdmarx != NULL)
+ {
+ /* Set the USART DMA Abort callback to Null.
+ No call back execution at end of DMA abort procedure */
+ husart->hdmarx->XferAbortCallback = NULL;
+
+ if (HAL_DMA_Abort(husart->hdmarx) != HAL_OK)
+ {
+ if (HAL_DMA_GetError(husart->hdmarx) == HAL_DMA_ERROR_TIMEOUT)
+ {
+ /* Set error code to DMA */
+ husart->ErrorCode = HAL_USART_ERROR_DMA;
+
+ return HAL_TIMEOUT;
+ }
+ }
+ }
+ }
+
+ /* Reset Tx and Rx transfer counters */
+ husart->TxXferCount = 0U;
+ husart->RxXferCount = 0U;
+
+ /* Clear the Error flags in the ICR register */
+ __HAL_USART_CLEAR_FLAG(husart, USART_CLEAR_OREF | USART_CLEAR_NEF | USART_CLEAR_PEF | USART_CLEAR_FEF);
+
+ /* Flush the whole TX FIFO (if needed) */
+ if (husart->FifoMode == USART_FIFOMODE_ENABLE)
+ {
+ __HAL_USART_SEND_REQ(husart, USART_TXDATA_FLUSH_REQUEST);
+ }
+
+ /* Discard the received data */
+ __HAL_USART_SEND_REQ(husart, USART_RXDATA_FLUSH_REQUEST);
+
+ /* Restore husart->State to Ready */
+ husart->State = HAL_USART_STATE_READY;
+
+ /* Reset Handle ErrorCode to No Error */
+ husart->ErrorCode = HAL_USART_ERROR_NONE;
+
+ return HAL_OK;
+}
+
+/**
+ * @brief Abort ongoing transfers (Interrupt mode).
+ * @param husart USART handle.
+ * @note This procedure could be used for aborting any ongoing transfer started in Interrupt or DMA mode.
+ * This procedure performs following operations :
+ * - Disable USART Interrupts (Tx and Rx)
+ * - Disable the DMA transfer in the peripheral register (if enabled)
+ * - Abort DMA transfer by calling HAL_DMA_Abort_IT (in case of transfer in DMA mode)
+ * - Set handle State to READY
+ * - At abort completion, call user abort complete callback
+ * @note This procedure is executed in Interrupt mode, meaning that abort procedure could be
+ * considered as completed only when user abort complete callback is executed (not when exiting function).
+ * @retval HAL status
+ */
+HAL_StatusTypeDef HAL_USART_Abort_IT(USART_HandleTypeDef *husart)
+{
+ uint32_t abortcplt = 1U;
+
+ /* Disable TXEIE, TCIE, RXNE, RXFT, TXFT, PE and ERR (Frame error, noise error, overrun error) interrupts */
+ CLEAR_BIT(husart->Instance->CR1, (USART_CR1_RXNEIE_RXFNEIE | USART_CR1_PEIE | USART_CR1_TXEIE_TXFNFIE |
+ USART_CR1_TCIE));
+ CLEAR_BIT(husart->Instance->CR3, (USART_CR3_EIE | USART_CR3_RXFTIE | USART_CR3_TXFTIE));
+
+ /* If DMA Tx and/or DMA Rx Handles are associated to USART Handle, DMA Abort complete callbacks should be initialised
+ before any call to DMA Abort functions */
+ /* DMA Tx Handle is valid */
+ if (husart->hdmatx != NULL)
+ {
+ /* Set DMA Abort Complete callback if USART DMA Tx request if enabled.
+ Otherwise, set it to NULL */
+ if (HAL_IS_BIT_SET(husart->Instance->CR3, USART_CR3_DMAT))
+ {
+ husart->hdmatx->XferAbortCallback = USART_DMATxAbortCallback;
+ }
+ else
+ {
+ husart->hdmatx->XferAbortCallback = NULL;
+ }
+ }
+ /* DMA Rx Handle is valid */
+ if (husart->hdmarx != NULL)
+ {
+ /* Set DMA Abort Complete callback if USART DMA Rx request if enabled.
+ Otherwise, set it to NULL */
+ if (HAL_IS_BIT_SET(husart->Instance->CR3, USART_CR3_DMAR))
+ {
+ husart->hdmarx->XferAbortCallback = USART_DMARxAbortCallback;
+ }
+ else
+ {
+ husart->hdmarx->XferAbortCallback = NULL;
+ }
+ }
+
+ /* Disable the USART DMA Tx request if enabled */
+ if (HAL_IS_BIT_SET(husart->Instance->CR3, USART_CR3_DMAT))
+ {
+ /* Disable DMA Tx at USART level */
+ CLEAR_BIT(husart->Instance->CR3, USART_CR3_DMAT);
+
+ /* Abort the USART DMA Tx channel : use non blocking DMA Abort API (callback) */
+ if (husart->hdmatx != NULL)
+ {
+ /* USART Tx DMA Abort callback has already been initialised :
+ will lead to call HAL_USART_AbortCpltCallback() at end of DMA abort procedure */
+
+ /* Abort DMA TX */
+ if (HAL_DMA_Abort_IT(husart->hdmatx) != HAL_OK)
+ {
+ husart->hdmatx->XferAbortCallback = NULL;
+ }
+ else
+ {
+ abortcplt = 0U;
+ }
+ }
+ }
+
+ /* Disable the USART DMA Rx request if enabled */
+ if (HAL_IS_BIT_SET(husart->Instance->CR3, USART_CR3_DMAR))
+ {
+ CLEAR_BIT(husart->Instance->CR3, USART_CR3_DMAR);
+
+ /* Abort the USART DMA Rx channel : use non blocking DMA Abort API (callback) */
+ if (husart->hdmarx != NULL)
+ {
+ /* USART Rx DMA Abort callback has already been initialised :
+ will lead to call HAL_USART_AbortCpltCallback() at end of DMA abort procedure */
+
+ /* Abort DMA RX */
+ if (HAL_DMA_Abort_IT(husart->hdmarx) != HAL_OK)
+ {
+ husart->hdmarx->XferAbortCallback = NULL;
+ abortcplt = 1U;
+ }
+ else
+ {
+ abortcplt = 0U;
+ }
+ }
+ }
+
+ /* if no DMA abort complete callback execution is required => call user Abort Complete callback */
+ if (abortcplt == 1U)
+ {
+ /* Reset Tx and Rx transfer counters */
+ husart->TxXferCount = 0U;
+ husart->RxXferCount = 0U;
+
+ /* Reset errorCode */
+ husart->ErrorCode = HAL_USART_ERROR_NONE;
+
+ /* Clear the Error flags in the ICR register */
+ __HAL_USART_CLEAR_FLAG(husart, USART_CLEAR_OREF | USART_CLEAR_NEF | USART_CLEAR_PEF | USART_CLEAR_FEF);
+
+ /* Flush the whole TX FIFO (if needed) */
+ if (husart->FifoMode == USART_FIFOMODE_ENABLE)
+ {
+ __HAL_USART_SEND_REQ(husart, USART_TXDATA_FLUSH_REQUEST);
+ }
+
+ /* Discard the received data */
+ __HAL_USART_SEND_REQ(husart, USART_RXDATA_FLUSH_REQUEST);
+
+ /* Restore husart->State to Ready */
+ husart->State = HAL_USART_STATE_READY;
+
+ /* As no DMA to be aborted, call directly user Abort complete callback */
+#if (USE_HAL_USART_REGISTER_CALLBACKS == 1)
+ /* Call registered Abort Complete Callback */
+ husart->AbortCpltCallback(husart);
+#else
+ /* Call legacy weak Abort Complete Callback */
+ HAL_USART_AbortCpltCallback(husart);
+#endif /* USE_HAL_USART_REGISTER_CALLBACKS */
+ }
+
+ return HAL_OK;
+}
+
+/**
+ * @brief Handle USART interrupt request.
+ * @param husart USART handle.
+ * @retval None
+ */
+void HAL_USART_IRQHandler(USART_HandleTypeDef *husart)
+{
+ uint32_t isrflags = READ_REG(husart->Instance->ISR);
+ uint32_t cr1its = READ_REG(husart->Instance->CR1);
+ uint32_t cr3its = READ_REG(husart->Instance->CR3);
+
+ uint32_t errorflags;
+ uint32_t errorcode;
+
+ /* If no error occurs */
+ errorflags = (isrflags & (uint32_t)(USART_ISR_PE | USART_ISR_FE | USART_ISR_ORE | USART_ISR_NE | USART_ISR_RTOF | USART_ISR_UDR));
+ if (errorflags == 0U)
+ {
+ /* USART in mode Receiver ---------------------------------------------------*/
+ if (((isrflags & USART_ISR_RXNE_RXFNE) != 0U)
+ && (((cr1its & USART_CR1_RXNEIE_RXFNEIE) != 0U)
+ || ((cr3its & USART_CR3_RXFTIE) != 0U)))
+ {
+ if (husart->RxISR != NULL)
+ {
+ husart->RxISR(husart);
+ }
+ return;
+ }
+ }
+
+ /* If some errors occur */
+ if ((errorflags != 0U)
+ && (((cr3its & (USART_CR3_RXFTIE | USART_CR3_EIE)) != 0U)
+ || ((cr1its & (USART_CR1_RXNEIE_RXFNEIE | USART_CR1_PEIE)) != 0U)))
+ {
+ /* USART parity error interrupt occurred -------------------------------------*/
+ if (((isrflags & USART_ISR_PE) != 0U) && ((cr1its & USART_CR1_PEIE) != 0U))
+ {
+ __HAL_USART_CLEAR_IT(husart, USART_CLEAR_PEF);
+
+ husart->ErrorCode |= HAL_USART_ERROR_PE;
+ }
+
+ /* USART frame error interrupt occurred --------------------------------------*/
+ if (((isrflags & USART_ISR_FE) != 0U) && ((cr3its & USART_CR3_EIE) != 0U))
+ {
+ __HAL_USART_CLEAR_IT(husart, USART_CLEAR_FEF);
+
+ husart->ErrorCode |= HAL_USART_ERROR_FE;
+ }
+
+ /* USART noise error interrupt occurred --------------------------------------*/
+ if (((isrflags & USART_ISR_NE) != 0U) && ((cr3its & USART_CR3_EIE) != 0U))
+ {
+ __HAL_USART_CLEAR_IT(husart, USART_CLEAR_NEF);
+
+ husart->ErrorCode |= HAL_USART_ERROR_NE;
+ }
+
+ /* USART Over-Run interrupt occurred -----------------------------------------*/
+ if (((isrflags & USART_ISR_ORE) != 0U)
+ && (((cr1its & USART_CR1_RXNEIE_RXFNEIE) != 0U) ||
+ ((cr3its & (USART_CR3_RXFTIE | USART_CR3_EIE)) != 0U)))
+ {
+ __HAL_USART_CLEAR_IT(husart, USART_CLEAR_OREF);
+
+ husart->ErrorCode |= HAL_USART_ERROR_ORE;
+ }
+
+ /* USART Receiver Timeout interrupt occurred ---------------------------------*/
+ if (((isrflags & USART_ISR_RTOF) != 0U) && ((cr1its & USART_CR1_RTOIE) != 0U))
+ {
+ __HAL_UART_CLEAR_FLAG(husart, UART_CLEAR_RTOF);
+
+ husart->ErrorCode |= HAL_USART_ERROR_RTO;
+ }
+
+ /* USART SPI slave underrun error interrupt occurred -------------------------*/
+ if (((isrflags & USART_ISR_UDR) != 0U) && ((cr3its & USART_CR3_EIE) != 0U))
+ {
+ /* Ignore SPI slave underrun errors when reception is going on */
+ if (husart->State == HAL_USART_STATE_BUSY_RX)
+ {
+ __HAL_USART_CLEAR_UDRFLAG(husart);
+ return;
+ }
+ else
+ {
+ __HAL_USART_CLEAR_UDRFLAG(husart);
+ husart->ErrorCode |= HAL_USART_ERROR_UDR;
+ }
+ }
+
+ /* Call USART Error Call back function if need be --------------------------*/
+ if (husart->ErrorCode != HAL_USART_ERROR_NONE)
+ {
+ /* USART in mode Receiver ---------------------------------------------------*/
+ if (((isrflags & USART_ISR_RXNE_RXFNE) != 0U)
+ && (((cr1its & USART_CR1_RXNEIE_RXFNEIE) != 0U)
+ || ((cr3its & USART_CR3_RXFTIE) != 0U)))
+ {
+ if (husart->RxISR != NULL)
+ {
+ husart->RxISR(husart);
+ }
+ }
+
+ /* If Overrun error occurs, or if any error occurs in DMA mode reception,
+ consider error as blocking */
+ errorcode = husart->ErrorCode & HAL_USART_ERROR_ORE;
+ if ((HAL_IS_BIT_SET(husart->Instance->CR3, USART_CR3_DMAR)) ||
+ (errorcode != 0U))
+ {
+ /* Blocking error : transfer is aborted
+ Set the USART state ready to be able to start again the process,
+ Disable Interrupts, and disable DMA requests, if ongoing */
+ USART_EndTransfer(husart);
+
+ /* Disable the USART DMA Rx request if enabled */
+ if (HAL_IS_BIT_SET(husart->Instance->CR3, USART_CR3_DMAR))
+ {
+ CLEAR_BIT(husart->Instance->CR3, USART_CR3_DMAR | USART_CR3_DMAR);
+
+ /* Abort the USART DMA Tx channel */
+ if (husart->hdmatx != NULL)
+ {
+ /* Set the USART Tx DMA Abort callback to NULL : no callback
+ executed at end of DMA abort procedure */
+ husart->hdmatx->XferAbortCallback = NULL;
+
+ /* Abort DMA TX */
+ (void)HAL_DMA_Abort_IT(husart->hdmatx);
+ }
+
+ /* Abort the USART DMA Rx channel */
+ if (husart->hdmarx != NULL)
+ {
+ /* Set the USART Rx DMA Abort callback :
+ will lead to call HAL_USART_ErrorCallback() at end of DMA abort procedure */
+ husart->hdmarx->XferAbortCallback = USART_DMAAbortOnError;
+
+ /* Abort DMA RX */
+ if (HAL_DMA_Abort_IT(husart->hdmarx) != HAL_OK)
+ {
+ /* Call Directly husart->hdmarx->XferAbortCallback function in case of error */
+ husart->hdmarx->XferAbortCallback(husart->hdmarx);
+ }
+ }
+ else
+ {
+ /* Call user error callback */
+#if (USE_HAL_USART_REGISTER_CALLBACKS == 1)
+ /* Call registered Error Callback */
+ husart->ErrorCallback(husart);
+#else
+ /* Call legacy weak Error Callback */
+ HAL_USART_ErrorCallback(husart);
+#endif /* USE_HAL_USART_REGISTER_CALLBACKS */
+ }
+ }
+ else
+ {
+ /* Call user error callback */
+#if (USE_HAL_USART_REGISTER_CALLBACKS == 1)
+ /* Call registered Error Callback */
+ husart->ErrorCallback(husart);
+#else
+ /* Call legacy weak Error Callback */
+ HAL_USART_ErrorCallback(husart);
+#endif /* USE_HAL_USART_REGISTER_CALLBACKS */
+ }
+ }
+ else
+ {
+ /* Non Blocking error : transfer could go on.
+ Error is notified to user through user error callback */
+#if (USE_HAL_USART_REGISTER_CALLBACKS == 1)
+ /* Call registered Error Callback */
+ husart->ErrorCallback(husart);
+#else
+ /* Call legacy weak Error Callback */
+ HAL_USART_ErrorCallback(husart);
+#endif /* USE_HAL_USART_REGISTER_CALLBACKS */
+ husart->ErrorCode = HAL_USART_ERROR_NONE;
+ }
+ }
+ return;
+
+ } /* End if some error occurs */
+
+
+ /* USART in mode Transmitter ------------------------------------------------*/
+ if (((isrflags & USART_ISR_TXE_TXFNF) != 0U)
+ && (((cr1its & USART_CR1_TXEIE_TXFNFIE) != 0U)
+ || ((cr3its & USART_CR3_TXFTIE) != 0U)))
+ {
+ if (husart->TxISR != NULL)
+ {
+ husart->TxISR(husart);
+ }
+ return;
+ }
+
+ /* USART in mode Transmitter (transmission end) -----------------------------*/
+ if (((isrflags & USART_ISR_TC) != 0U) && ((cr1its & USART_CR1_TCIE) != 0U))
+ {
+ USART_EndTransmit_IT(husart);
+ return;
+ }
+
+ /* USART TX Fifo Empty occurred ----------------------------------------------*/
+ if (((isrflags & USART_ISR_TXFE) != 0U) && ((cr1its & USART_CR1_TXFEIE) != 0U))
+ {
+#if (USE_HAL_USART_REGISTER_CALLBACKS == 1)
+ /* Call registered Tx Fifo Empty Callback */
+ husart->TxFifoEmptyCallback(husart);
+#else
+ /* Call legacy weak Tx Fifo Empty Callback */
+ HAL_USARTEx_TxFifoEmptyCallback(husart);
+#endif /* USE_HAL_USART_REGISTER_CALLBACKS */
+ return;
+ }
+
+ /* USART RX Fifo Full occurred ----------------------------------------------*/
+ if (((isrflags & USART_ISR_RXFF) != 0U) && ((cr1its & USART_CR1_RXFFIE) != 0U))
+ {
+#if (USE_HAL_USART_REGISTER_CALLBACKS == 1)
+ /* Call registered Rx Fifo Full Callback */
+ husart->RxFifoFullCallback(husart);
+#else
+ /* Call legacy weak Rx Fifo Full Callback */
+ HAL_USARTEx_RxFifoFullCallback(husart);
+#endif /* USE_HAL_USART_REGISTER_CALLBACKS */
+ return;
+ }
+}
+
+/**
+ * @brief Tx Transfer completed callback.
+ * @param husart USART handle.
+ * @retval None
+ */
+__weak void HAL_USART_TxCpltCallback(USART_HandleTypeDef *husart)
+{
+ /* Prevent unused argument(s) compilation warning */
+ UNUSED(husart);
+
+ /* NOTE : This function should not be modified, when the callback is needed,
+ the HAL_USART_TxCpltCallback can be implemented in the user file.
+ */
+}
+
+/**
+ * @brief Tx Half Transfer completed callback.
+ * @param husart USART handle.
+ * @retval None
+ */
+__weak void HAL_USART_TxHalfCpltCallback(USART_HandleTypeDef *husart)
+{
+ /* Prevent unused argument(s) compilation warning */
+ UNUSED(husart);
+
+ /* NOTE: This function should not be modified, when the callback is needed,
+ the HAL_USART_TxHalfCpltCallback can be implemented in the user file.
+ */
+}
+
+/**
+ * @brief Rx Transfer completed callback.
+ * @param husart USART handle.
+ * @retval None
+ */
+__weak void HAL_USART_RxCpltCallback(USART_HandleTypeDef *husart)
+{
+ /* Prevent unused argument(s) compilation warning */
+ UNUSED(husart);
+
+ /* NOTE: This function should not be modified, when the callback is needed,
+ the HAL_USART_RxCpltCallback can be implemented in the user file.
+ */
+}
+
+/**
+ * @brief Rx Half Transfer completed callback.
+ * @param husart USART handle.
+ * @retval None
+ */
+__weak void HAL_USART_RxHalfCpltCallback(USART_HandleTypeDef *husart)
+{
+ /* Prevent unused argument(s) compilation warning */
+ UNUSED(husart);
+
+ /* NOTE : This function should not be modified, when the callback is needed,
+ the HAL_USART_RxHalfCpltCallback can be implemented in the user file
+ */
+}
+
+/**
+ * @brief Tx/Rx Transfers completed callback for the non-blocking process.
+ * @param husart USART handle.
+ * @retval None
+ */
+__weak void HAL_USART_TxRxCpltCallback(USART_HandleTypeDef *husart)
+{
+ /* Prevent unused argument(s) compilation warning */
+ UNUSED(husart);
+
+ /* NOTE : This function should not be modified, when the callback is needed,
+ the HAL_USART_TxRxCpltCallback can be implemented in the user file
+ */
+}
+
+/**
+ * @brief USART error callback.
+ * @param husart USART handle.
+ * @retval None
+ */
+__weak void HAL_USART_ErrorCallback(USART_HandleTypeDef *husart)
+{
+ /* Prevent unused argument(s) compilation warning */
+ UNUSED(husart);
+
+ /* NOTE : This function should not be modified, when the callback is needed,
+ the HAL_USART_ErrorCallback can be implemented in the user file.
+ */
+}
+
+/**
+ * @brief USART Abort Complete callback.
+ * @param husart USART handle.
+ * @retval None
+ */
+__weak void HAL_USART_AbortCpltCallback(USART_HandleTypeDef *husart)
+{
+ /* Prevent unused argument(s) compilation warning */
+ UNUSED(husart);
+
+ /* NOTE : This function should not be modified, when the callback is needed,
+ the HAL_USART_AbortCpltCallback can be implemented in the user file.
+ */
+}
+
+/**
+ * @}
+ */
+
+/** @defgroup USART_Exported_Functions_Group4 Peripheral State and Error functions
+ * @brief USART Peripheral State and Error functions
+ *
+@verbatim
+ ==============================================================================
+ ##### Peripheral State and Error functions #####
+ ==============================================================================
+ [..]
+ This subsection provides functions allowing to :
+ (+) Return the USART handle state
+ (+) Return the USART handle error code
+
+@endverbatim
+ * @{
+ */
+
+
+/**
+ * @brief Return the USART handle state.
+ * @param husart pointer to a USART_HandleTypeDef structure that contains
+ * the configuration information for the specified USART.
+ * @retval USART handle state
+ */
+HAL_USART_StateTypeDef HAL_USART_GetState(USART_HandleTypeDef *husart)
+{
+ return husart->State;
+}
+
+/**
+ * @brief Return the USART error code.
+ * @param husart pointer to a USART_HandleTypeDef structure that contains
+ * the configuration information for the specified USART.
+ * @retval USART handle Error Code
+ */
+uint32_t HAL_USART_GetError(USART_HandleTypeDef *husart)
+{
+ return husart->ErrorCode;
+}
+
+/**
+ * @}
+ */
+
+/**
+ * @}
+ */
+
+/** @defgroup USART_Private_Functions USART Private Functions
+ * @{
+ */
+
+/**
+ * @brief Initialize the callbacks to their default values.
+ * @param husart USART handle.
+ * @retval none
+ */
+#if (USE_HAL_USART_REGISTER_CALLBACKS == 1)
+void USART_InitCallbacksToDefault(USART_HandleTypeDef *husart)
+{
+ /* Init the USART Callback settings */
+ husart->TxHalfCpltCallback = HAL_USART_TxHalfCpltCallback; /* Legacy weak TxHalfCpltCallback */
+ husart->TxCpltCallback = HAL_USART_TxCpltCallback; /* Legacy weak TxCpltCallback */
+ husart->RxHalfCpltCallback = HAL_USART_RxHalfCpltCallback; /* Legacy weak RxHalfCpltCallback */
+ husart->RxCpltCallback = HAL_USART_RxCpltCallback; /* Legacy weak RxCpltCallback */
+ husart->TxRxCpltCallback = HAL_USART_TxRxCpltCallback; /* Legacy weak TxRxCpltCallback */
+ husart->ErrorCallback = HAL_USART_ErrorCallback; /* Legacy weak ErrorCallback */
+ husart->AbortCpltCallback = HAL_USART_AbortCpltCallback; /* Legacy weak AbortCpltCallback */
+ husart->RxFifoFullCallback = HAL_USARTEx_RxFifoFullCallback; /* Legacy weak RxFifoFullCallback */
+ husart->TxFifoEmptyCallback = HAL_USARTEx_TxFifoEmptyCallback; /* Legacy weak TxFifoEmptyCallback */
+}
+#endif /* USE_HAL_USART_REGISTER_CALLBACKS */
+
+/**
+ * @brief End ongoing transfer on USART peripheral (following error detection or Transfer completion).
+ * @param husart USART handle.
+ * @retval None
+ */
+static void USART_EndTransfer(USART_HandleTypeDef *husart)
+{
+ /* Disable TXEIE, TCIE, RXNE, RXFT, TXFT, PE and ERR (Frame error, noise error, overrun error) interrupts */
+ CLEAR_BIT(husart->Instance->CR1, (USART_CR1_RXNEIE_RXFNEIE | USART_CR1_PEIE | USART_CR1_TXEIE_TXFNFIE |
+ USART_CR1_TCIE));
+ CLEAR_BIT(husart->Instance->CR3, (USART_CR3_EIE | USART_CR3_RXFTIE | USART_CR3_TXFTIE));
+
+ /* At end of process, restore husart->State to Ready */
+ husart->State = HAL_USART_STATE_READY;
+}
+
+/**
+ * @brief DMA USART transmit process complete callback.
+ * @param hdma DMA handle.
+ * @retval None
+ */
+static void USART_DMATransmitCplt(DMA_HandleTypeDef *hdma)
+{
+ USART_HandleTypeDef *husart = (USART_HandleTypeDef *)(hdma->Parent);
+
+ /* DMA Normal mode */
+ if (hdma->Init.Mode != DMA_CIRCULAR)
+ {
+ husart->TxXferCount = 0U;
+
+ if (husart->State == HAL_USART_STATE_BUSY_TX)
+ {
+ /* Disable the DMA transfer for transmit request by resetting the DMAT bit
+ in the USART CR3 register */
+ CLEAR_BIT(husart->Instance->CR3, USART_CR3_DMAT);
+
+ /* Enable the USART Transmit Complete Interrupt */
+ __HAL_USART_ENABLE_IT(husart, USART_IT_TC);
+ }
+ }
+ /* DMA Circular mode */
+ else
+ {
+ if (husart->State == HAL_USART_STATE_BUSY_TX)
+ {
+#if (USE_HAL_USART_REGISTER_CALLBACKS == 1)
+ /* Call registered Tx Complete Callback */
+ husart->TxCpltCallback(husart);
+#else
+ /* Call legacy weak Tx Complete Callback */
+ HAL_USART_TxCpltCallback(husart);
+#endif /* USE_HAL_USART_REGISTER_CALLBACKS */
+ }
+ }
+}
+
+/**
+ * @brief DMA USART transmit process half complete callback.
+ * @param hdma DMA handle.
+ * @retval None
+ */
+static void USART_DMATxHalfCplt(DMA_HandleTypeDef *hdma)
+{
+ USART_HandleTypeDef *husart = (USART_HandleTypeDef *)(hdma->Parent);
+
+#if (USE_HAL_USART_REGISTER_CALLBACKS == 1)
+ /* Call registered Tx Half Complete Callback */
+ husart->TxHalfCpltCallback(husart);
+#else
+ /* Call legacy weak Tx Half Complete Callback */
+ HAL_USART_TxHalfCpltCallback(husart);
+#endif /* USE_HAL_USART_REGISTER_CALLBACKS */
+}
+
+/**
+ * @brief DMA USART receive process complete callback.
+ * @param hdma DMA handle.
+ * @retval None
+ */
+static void USART_DMAReceiveCplt(DMA_HandleTypeDef *hdma)
+{
+ USART_HandleTypeDef *husart = (USART_HandleTypeDef *)(hdma->Parent);
+
+ /* DMA Normal mode */
+ if (hdma->Init.Mode != DMA_CIRCULAR)
+ {
+ husart->RxXferCount = 0U;
+
+ /* Disable PE and ERR (Frame error, noise error, overrun error) interrupts */
+ CLEAR_BIT(husart->Instance->CR1, USART_CR1_PEIE);
+ CLEAR_BIT(husart->Instance->CR3, USART_CR3_EIE);
+
+ /* Disable the DMA RX transfer for the receiver request by resetting the DMAR bit
+ in USART CR3 register */
+ CLEAR_BIT(husart->Instance->CR3, USART_CR3_DMAR);
+ /* similarly, disable the DMA TX transfer that was started to provide the
+ clock to the slave device */
+ CLEAR_BIT(husart->Instance->CR3, USART_CR3_DMAT);
+
+ if (husart->State == HAL_USART_STATE_BUSY_RX)
+ {
+#if (USE_HAL_USART_REGISTER_CALLBACKS == 1)
+ /* Call registered Rx Complete Callback */
+ husart->RxCpltCallback(husart);
+#else
+ /* Call legacy weak Rx Complete Callback */
+ HAL_USART_RxCpltCallback(husart);
+#endif /* USE_HAL_USART_REGISTER_CALLBACKS */
+ }
+ /* The USART state is HAL_USART_STATE_BUSY_TX_RX */
+ else
+ {
+#if (USE_HAL_USART_REGISTER_CALLBACKS == 1)
+ /* Call registered Tx Rx Complete Callback */
+ husart->TxRxCpltCallback(husart);
+#else
+ /* Call legacy weak Tx Rx Complete Callback */
+ HAL_USART_TxRxCpltCallback(husart);
+#endif /* USE_HAL_USART_REGISTER_CALLBACKS */
+ }
+ husart->State = HAL_USART_STATE_READY;
+ }
+ /* DMA circular mode */
+ else
+ {
+ if (husart->State == HAL_USART_STATE_BUSY_RX)
+ {
+#if (USE_HAL_USART_REGISTER_CALLBACKS == 1)
+ /* Call registered Rx Complete Callback */
+ husart->RxCpltCallback(husart);
+#else
+ /* Call legacy weak Rx Complete Callback */
+ HAL_USART_RxCpltCallback(husart);
+#endif /* USE_HAL_USART_REGISTER_CALLBACKS */
+ }
+ /* The USART state is HAL_USART_STATE_BUSY_TX_RX */
+ else
+ {
+#if (USE_HAL_USART_REGISTER_CALLBACKS == 1)
+ /* Call registered Tx Rx Complete Callback */
+ husart->TxRxCpltCallback(husart);
+#else
+ /* Call legacy weak Tx Rx Complete Callback */
+ HAL_USART_TxRxCpltCallback(husart);
+#endif /* USE_HAL_USART_REGISTER_CALLBACKS */
+ }
+ }
+}
+
+/**
+ * @brief DMA USART receive process half complete callback.
+ * @param hdma DMA handle.
+ * @retval None
+ */
+static void USART_DMARxHalfCplt(DMA_HandleTypeDef *hdma)
+{
+ USART_HandleTypeDef *husart = (USART_HandleTypeDef *)(hdma->Parent);
+
+#if (USE_HAL_USART_REGISTER_CALLBACKS == 1)
+ /* Call registered Rx Half Complete Callback */
+ husart->RxHalfCpltCallback(husart);
+#else
+ /* Call legacy weak Rx Half Complete Callback */
+ HAL_USART_RxHalfCpltCallback(husart);
+#endif /* USE_HAL_USART_REGISTER_CALLBACKS */
+}
+
+/**
+ * @brief DMA USART communication error callback.
+ * @param hdma DMA handle.
+ * @retval None
+ */
+static void USART_DMAError(DMA_HandleTypeDef *hdma)
+{
+ USART_HandleTypeDef *husart = (USART_HandleTypeDef *)(hdma->Parent);
+
+ husart->RxXferCount = 0U;
+ husart->TxXferCount = 0U;
+ USART_EndTransfer(husart);
+
+ husart->ErrorCode |= HAL_USART_ERROR_DMA;
+ husart->State = HAL_USART_STATE_READY;
+
+#if (USE_HAL_USART_REGISTER_CALLBACKS == 1)
+ /* Call registered Error Callback */
+ husart->ErrorCallback(husart);
+#else
+ /* Call legacy weak Error Callback */
+ HAL_USART_ErrorCallback(husart);
+#endif /* USE_HAL_USART_REGISTER_CALLBACKS */
+}
+
+/**
+ * @brief DMA USART communication abort callback, when initiated by HAL services on Error
+ * (To be called at end of DMA Abort procedure following error occurrence).
+ * @param hdma DMA handle.
+ * @retval None
+ */
+static void USART_DMAAbortOnError(DMA_HandleTypeDef *hdma)
+{
+ USART_HandleTypeDef *husart = (USART_HandleTypeDef *)(hdma->Parent);
+ husart->RxXferCount = 0U;
+ husart->TxXferCount = 0U;
+
+#if (USE_HAL_USART_REGISTER_CALLBACKS == 1)
+ /* Call registered Error Callback */
+ husart->ErrorCallback(husart);
+#else
+ /* Call legacy weak Error Callback */
+ HAL_USART_ErrorCallback(husart);
+#endif /* USE_HAL_USART_REGISTER_CALLBACKS */
+}
+
+/**
+ * @brief DMA USART Tx communication abort callback, when initiated by user
+ * (To be called at end of DMA Tx Abort procedure following user abort request).
+ * @note When this callback is executed, User Abort complete call back is called only if no
+ * Abort still ongoing for Rx DMA Handle.
+ * @param hdma DMA handle.
+ * @retval None
+ */
+static void USART_DMATxAbortCallback(DMA_HandleTypeDef *hdma)
+{
+ USART_HandleTypeDef *husart = (USART_HandleTypeDef *)(hdma->Parent);
+
+ husart->hdmatx->XferAbortCallback = NULL;
+
+ /* Check if an Abort process is still ongoing */
+ if (husart->hdmarx != NULL)
+ {
+ if (husart->hdmarx->XferAbortCallback != NULL)
+ {
+ return;
+ }
+ }
+
+ /* No Abort process still ongoing : All DMA channels are aborted, call user Abort Complete callback */
+ husart->TxXferCount = 0U;
+ husart->RxXferCount = 0U;
+
+ /* Reset errorCode */
+ husart->ErrorCode = HAL_USART_ERROR_NONE;
+
+ /* Clear the Error flags in the ICR register */
+ __HAL_USART_CLEAR_FLAG(husart, USART_CLEAR_OREF | USART_CLEAR_NEF | USART_CLEAR_PEF | USART_CLEAR_FEF);
+
+ /* Restore husart->State to Ready */
+ husart->State = HAL_USART_STATE_READY;
+
+ /* Call user Abort complete callback */
+#if (USE_HAL_USART_REGISTER_CALLBACKS == 1)
+ /* Call registered Abort Complete Callback */
+ husart->AbortCpltCallback(husart);
+#else
+ /* Call legacy weak Abort Complete Callback */
+ HAL_USART_AbortCpltCallback(husart);
+#endif /* USE_HAL_USART_REGISTER_CALLBACKS */
+
+}
+
+
+/**
+ * @brief DMA USART Rx communication abort callback, when initiated by user
+ * (To be called at end of DMA Rx Abort procedure following user abort request).
+ * @note When this callback is executed, User Abort complete call back is called only if no
+ * Abort still ongoing for Tx DMA Handle.
+ * @param hdma DMA handle.
+ * @retval None
+ */
+static void USART_DMARxAbortCallback(DMA_HandleTypeDef *hdma)
+{
+ USART_HandleTypeDef *husart = (USART_HandleTypeDef *)(hdma->Parent);
+
+ husart->hdmarx->XferAbortCallback = NULL;
+
+ /* Check if an Abort process is still ongoing */
+ if (husart->hdmatx != NULL)
+ {
+ if (husart->hdmatx->XferAbortCallback != NULL)
+ {
+ return;
+ }
+ }
+
+ /* No Abort process still ongoing : All DMA channels are aborted, call user Abort Complete callback */
+ husart->TxXferCount = 0U;
+ husart->RxXferCount = 0U;
+
+ /* Reset errorCode */
+ husart->ErrorCode = HAL_USART_ERROR_NONE;
+
+ /* Clear the Error flags in the ICR register */
+ __HAL_USART_CLEAR_FLAG(husart, USART_CLEAR_OREF | USART_CLEAR_NEF | USART_CLEAR_PEF | USART_CLEAR_FEF);
+
+ /* Restore husart->State to Ready */
+ husart->State = HAL_USART_STATE_READY;
+
+ /* Call user Abort complete callback */
+#if (USE_HAL_USART_REGISTER_CALLBACKS == 1)
+ /* Call registered Abort Complete Callback */
+ husart->AbortCpltCallback(husart);
+#else
+ /* Call legacy weak Abort Complete Callback */
+ HAL_USART_AbortCpltCallback(husart);
+#endif /* USE_HAL_USART_REGISTER_CALLBACKS */
+}
+
+
+/**
+ * @brief Handle USART Communication Timeout.
+ * @param husart USART handle.
+ * @param Flag Specifies the USART flag to check.
+ * @param Status the Flag status (SET or RESET).
+ * @param Tickstart Tick start value
+ * @param Timeout timeout duration.
+ * @retval HAL status
+ */
+static HAL_StatusTypeDef USART_WaitOnFlagUntilTimeout(USART_HandleTypeDef *husart, uint32_t Flag, FlagStatus Status,
+ uint32_t Tickstart, uint32_t Timeout)
+{
+ /* Wait until flag is set */
+ while ((__HAL_USART_GET_FLAG(husart, Flag) ? SET : RESET) == Status)
+ {
+ /* Check for the Timeout */
+ if (Timeout != HAL_MAX_DELAY)
+ {
+ if (((HAL_GetTick() - Tickstart) > Timeout) || (Timeout == 0U))
+ {
+ husart->State = HAL_USART_STATE_READY;
+
+ /* Process Unlocked */
+ __HAL_UNLOCK(husart);
+
+ return HAL_TIMEOUT;
+ }
+ }
+ }
+ return HAL_OK;
+}
+
+/**
+ * @brief Configure the USART peripheral.
+ * @param husart USART handle.
+ * @retval HAL status
+ */
+static HAL_StatusTypeDef USART_SetConfig(USART_HandleTypeDef *husart)
+{
+ uint32_t tmpreg;
+ USART_ClockSourceTypeDef clocksource;
+ HAL_StatusTypeDef ret = HAL_OK;
+ uint16_t brrtemp;
+ uint32_t usartdiv = 0x00000000;
+ PLL2_ClocksTypeDef pll2_clocks;
+ PLL3_ClocksTypeDef pll3_clocks;
+ uint32_t pclk;
+
+ /* Check the parameters */
+ assert_param(IS_USART_POLARITY(husart->Init.CLKPolarity));
+ assert_param(IS_USART_PHASE(husart->Init.CLKPhase));
+ assert_param(IS_USART_LASTBIT(husart->Init.CLKLastBit));
+ assert_param(IS_USART_BAUDRATE(husart->Init.BaudRate));
+ assert_param(IS_USART_WORD_LENGTH(husart->Init.WordLength));
+ assert_param(IS_USART_STOPBITS(husart->Init.StopBits));
+ assert_param(IS_USART_PARITY(husart->Init.Parity));
+ assert_param(IS_USART_MODE(husart->Init.Mode));
+ assert_param(IS_USART_PRESCALER(husart->Init.ClockPrescaler));
+
+ /*-------------------------- USART CR1 Configuration -----------------------*/
+ /* Clear M, PCE, PS, TE and RE bits and configure
+ * the USART Word Length, Parity and Mode:
+ * set the M bits according to husart->Init.WordLength value
+ * set PCE and PS bits according to husart->Init.Parity value
+ * set TE and RE bits according to husart->Init.Mode value
+ * force OVER8 to 1 to allow to reach the maximum speed (Fclock/8) */
+ tmpreg = (uint32_t)husart->Init.WordLength | husart->Init.Parity | husart->Init.Mode | USART_CR1_OVER8;
+ MODIFY_REG(husart->Instance->CR1, USART_CR1_FIELDS, tmpreg);
+
+ /*---------------------------- USART CR2 Configuration ---------------------*/
+ /* Clear and configure the USART Clock, CPOL, CPHA, LBCL STOP and SLVEN bits:
+ * set CPOL bit according to husart->Init.CLKPolarity value
+ * set CPHA bit according to husart->Init.CLKPhase value
+ * set LBCL bit according to husart->Init.CLKLastBit value (used in SPI master mode only)
+ * set STOP[13:12] bits according to husart->Init.StopBits value */
+ tmpreg = (uint32_t)(USART_CLOCK_ENABLE);
+ tmpreg |= (uint32_t)husart->Init.CLKLastBit;
+ tmpreg |= ((uint32_t)husart->Init.CLKPolarity | (uint32_t)husart->Init.CLKPhase);
+ tmpreg |= (uint32_t)husart->Init.StopBits;
+ MODIFY_REG(husart->Instance->CR2, USART_CR2_FIELDS, tmpreg);
+
+ /*-------------------------- USART PRESC Configuration -----------------------*/
+ /* Configure
+ * - USART Clock Prescaler : set PRESCALER according to husart->Init.ClockPrescaler value */
+ MODIFY_REG(husart->Instance->PRESC, USART_PRESC_PRESCALER, husart->Init.ClockPrescaler);
+
+ /*-------------------------- USART BRR Configuration -----------------------*/
+ /* BRR is filled-up according to OVER8 bit setting which is forced to 1 */
+ USART_GETCLOCKSOURCE(husart, clocksource);
+
+ switch (clocksource)
+ {
+ case USART_CLOCKSOURCE_D2PCLK1:
+ pclk = HAL_RCC_GetPCLK1Freq();
+ usartdiv = (uint32_t)(USART_DIV_SAMPLING8(pclk, husart->Init.BaudRate, husart->Init.ClockPrescaler));
+ break;
+ case USART_CLOCKSOURCE_D2PCLK2:
+ pclk = HAL_RCC_GetPCLK2Freq();
+ usartdiv = (uint32_t)(USART_DIV_SAMPLING8(pclk, husart->Init.BaudRate, husart->Init.ClockPrescaler));
+ break;
+ case USART_CLOCKSOURCE_PLL2:
+ HAL_RCCEx_GetPLL2ClockFreq(&pll2_clocks);
+ usartdiv = (uint32_t)(USART_DIV_SAMPLING8(pll2_clocks.PLL2_Q_Frequency, husart->Init.BaudRate, husart->Init.ClockPrescaler));
+ break;
+ case USART_CLOCKSOURCE_PLL3:
+ HAL_RCCEx_GetPLL3ClockFreq(&pll3_clocks);
+ usartdiv = (uint32_t)(USART_DIV_SAMPLING8(pll3_clocks.PLL3_Q_Frequency, husart->Init.BaudRate, husart->Init.ClockPrescaler));
+ break;
+ case USART_CLOCKSOURCE_HSI:
+ if (__HAL_RCC_GET_FLAG(RCC_FLAG_HSIDIV) != 0U)
+ {
+ usartdiv = (uint32_t)(USART_DIV_SAMPLING8((HSI_VALUE >> (__HAL_RCC_GET_HSI_DIVIDER() >> 3U)), husart->Init.BaudRate, husart->Init.ClockPrescaler));
+ }
+ else
+ {
+ usartdiv = (uint32_t)(USART_DIV_SAMPLING8(HSI_VALUE, husart->Init.BaudRate, husart->Init.ClockPrescaler));
+ }
+ break;
+ case USART_CLOCKSOURCE_CSI:
+ usartdiv = (uint32_t)(USART_DIV_SAMPLING8(CSI_VALUE, husart->Init.BaudRate, husart->Init.ClockPrescaler));
+ break;
+ case USART_CLOCKSOURCE_LSE:
+ usartdiv = (uint32_t)(USART_DIV_SAMPLING8(LSE_VALUE, husart->Init.BaudRate, husart->Init.ClockPrescaler));
+ break;
+ default:
+ ret = HAL_ERROR;
+ break;
+ }
+
+ /* USARTDIV must be greater than or equal to 0d16 and smaller than or equal to ffff */
+ if ((usartdiv >= USART_BRR_MIN) && (usartdiv <= USART_BRR_MAX))
+ {
+ brrtemp = (uint16_t)(usartdiv & 0xFFF0U);
+ brrtemp |= (uint16_t)((usartdiv & (uint16_t)0x000FU) >> 1U);
+ husart->Instance->BRR = brrtemp;
+ }
+ else
+ {
+ ret = HAL_ERROR;
+ }
+
+ /* Initialize the number of data to process during RX/TX ISR execution */
+ husart->NbTxDataToProcess = 1U;
+ husart->NbRxDataToProcess = 1U;
+
+ /* Clear ISR function pointers */
+ husart->RxISR = NULL;
+ husart->TxISR = NULL;
+
+ return ret;
+}
+
+/**
+ * @brief Check the USART Idle State.
+ * @param husart USART handle.
+ * @retval HAL status
+ */
+static HAL_StatusTypeDef USART_CheckIdleState(USART_HandleTypeDef *husart)
+{
+ uint32_t tickstart;
+
+ /* Initialize the USART ErrorCode */
+ husart->ErrorCode = HAL_USART_ERROR_NONE;
+
+ /* Init tickstart for timeout managment*/
+ tickstart = HAL_GetTick();
+
+ /* Check if the Transmitter is enabled */
+ if ((husart->Instance->CR1 & USART_CR1_TE) == USART_CR1_TE)
+ {
+ /* Wait until TEACK flag is set */
+ if (USART_WaitOnFlagUntilTimeout(husart, USART_ISR_TEACK, RESET, tickstart, USART_TEACK_REACK_TIMEOUT) != HAL_OK)
+ {
+ /* Timeout occurred */
+ return HAL_TIMEOUT;
+ }
+ }
+ /* Check if the Receiver is enabled */
+ if ((husart->Instance->CR1 & USART_CR1_RE) == USART_CR1_RE)
+ {
+ /* Wait until REACK flag is set */
+ if (USART_WaitOnFlagUntilTimeout(husart, USART_ISR_REACK, RESET, tickstart, USART_TEACK_REACK_TIMEOUT) != HAL_OK)
+ {
+ /* Timeout occurred */
+ return HAL_TIMEOUT;
+ }
+ }
+
+ /* Initialize the USART state*/
+ husart->State = HAL_USART_STATE_READY;
+
+ /* Process Unlocked */
+ __HAL_UNLOCK(husart);
+
+ return HAL_OK;
+}
+
+/**
+ * @brief Simplex send an amount of data in non-blocking mode.
+ * @note Function called under interruption only, once
+ * interruptions have been enabled by HAL_USART_Transmit_IT().
+ * @note The USART errors are not managed to avoid the overrun error.
+ * @note ISR function executed when FIFO mode is disabled and when the
+ * data word length is less than 9 bits long.
+ * @param husart USART handle.
+ * @retval None
+ */
+static void USART_TxISR_8BIT(USART_HandleTypeDef *husart)
+{
+ const HAL_USART_StateTypeDef state = husart->State;
+
+ /* Check that a Tx process is ongoing */
+ if ((state == HAL_USART_STATE_BUSY_TX) ||
+ (state == HAL_USART_STATE_BUSY_TX_RX))
+ {
+ if (husart->TxXferCount == 0U)
+ {
+ /* Disable the USART Transmit data register empty interrupt */
+ __HAL_USART_DISABLE_IT(husart, USART_IT_TXE);
+
+ /* Enable the USART Transmit Complete Interrupt */
+ __HAL_USART_ENABLE_IT(husart, USART_IT_TC);
+ }
+ else
+ {
+ husart->Instance->TDR = (uint8_t)(*husart->pTxBuffPtr & (uint8_t)0xFF);
+ husart->pTxBuffPtr++;
+ husart->TxXferCount--;
+ }
+ }
+}
+
+/**
+ * @brief Simplex send an amount of data in non-blocking mode.
+ * @note Function called under interruption only, once
+ * interruptions have been enabled by HAL_USART_Transmit_IT().
+ * @note The USART errors are not managed to avoid the overrun error.
+ * @note ISR function executed when FIFO mode is disabled and when the
+ * data word length is 9 bits long.
+ * @param husart USART handle.
+ * @retval None
+ */
+static void USART_TxISR_16BIT(USART_HandleTypeDef *husart)
+{
+ const HAL_USART_StateTypeDef state = husart->State;
+ uint16_t *tmp;
+
+ if ((state == HAL_USART_STATE_BUSY_TX) ||
+ (state == HAL_USART_STATE_BUSY_TX_RX))
+ {
+ if (husart->TxXferCount == 0U)
+ {
+ /* Disable the USART Transmit data register empty interrupt */
+ __HAL_USART_DISABLE_IT(husart, USART_IT_TXE);
+
+ /* Enable the USART Transmit Complete Interrupt */
+ __HAL_USART_ENABLE_IT(husart, USART_IT_TC);
+ }
+ else
+ {
+ tmp = (uint16_t *) husart->pTxBuffPtr;
+ husart->Instance->TDR = (uint16_t)(*tmp & 0x01FFU);
+ husart->pTxBuffPtr += 2U;
+ husart->TxXferCount--;
+ }
+ }
+}
+
+/**
+ * @brief Simplex send an amount of data in non-blocking mode.
+ * @note Function called under interruption only, once
+ * interruptions have been enabled by HAL_USART_Transmit_IT().
+ * @note The USART errors are not managed to avoid the overrun error.
+ * @note ISR function executed when FIFO mode is enabled and when the
+ * data word length is less than 9 bits long.
+ * @param husart USART handle.
+ * @retval None
+ */
+static void USART_TxISR_8BIT_FIFOEN(USART_HandleTypeDef *husart)
+{
+ const HAL_USART_StateTypeDef state = husart->State;
+ uint16_t nb_tx_data;
+
+ /* Check that a Tx process is ongoing */
+ if ((state == HAL_USART_STATE_BUSY_TX) ||
+ (state == HAL_USART_STATE_BUSY_TX_RX))
+ {
+ for (nb_tx_data = husart->NbTxDataToProcess ; nb_tx_data > 0U ; nb_tx_data--)
+ {
+ if (husart->TxXferCount == 0U)
+ {
+ /* Disable the TX FIFO threshold interrupt */
+ __HAL_USART_DISABLE_IT(husart, USART_IT_TXFT);
+
+ /* Enable the USART Transmit Complete Interrupt */
+ __HAL_USART_ENABLE_IT(husart, USART_IT_TC);
+
+ break; /* force exit loop */
+ }
+ else if (__HAL_USART_GET_FLAG(husart, USART_FLAG_TXFNF) == SET)
+ {
+ husart->Instance->TDR = (uint8_t)(*husart->pTxBuffPtr & (uint8_t)0xFF);
+ husart->pTxBuffPtr++;
+ husart->TxXferCount--;
+ }
+ else
+ {
+ /* Nothing to do */
+ }
+ }
+ }
+}
+
+/**
+ * @brief Simplex send an amount of data in non-blocking mode.
+ * @note Function called under interruption only, once
+ * interruptions have been enabled by HAL_USART_Transmit_IT().
+ * @note The USART errors are not managed to avoid the overrun error.
+ * @note ISR function executed when FIFO mode is enabled and when the
+ * data word length is 9 bits long.
+ * @param husart USART handle.
+ * @retval None
+ */
+static void USART_TxISR_16BIT_FIFOEN(USART_HandleTypeDef *husart)
+{
+ const HAL_USART_StateTypeDef state = husart->State;
+ uint16_t *tmp;
+ uint16_t nb_tx_data;
+
+ /* Check that a Tx process is ongoing */
+ if ((state == HAL_USART_STATE_BUSY_TX) ||
+ (state == HAL_USART_STATE_BUSY_TX_RX))
+ {
+ for (nb_tx_data = husart->NbTxDataToProcess ; nb_tx_data > 0U ; nb_tx_data--)
+ {
+ if (husart->TxXferCount == 0U)
+ {
+ /* Disable the TX FIFO threshold interrupt */
+ __HAL_USART_DISABLE_IT(husart, USART_IT_TXFT);
+
+ /* Enable the USART Transmit Complete Interrupt */
+ __HAL_USART_ENABLE_IT(husart, USART_IT_TC);
+
+ break; /* force exit loop */
+ }
+ else if (__HAL_USART_GET_FLAG(husart, USART_FLAG_TXFNF) == SET)
+ {
+ tmp = (uint16_t *) husart->pTxBuffPtr;
+ husart->Instance->TDR = (uint16_t)(*tmp & 0x01FFU);
+ husart->pTxBuffPtr += 2U;
+ husart->TxXferCount--;
+ }
+ else
+ {
+ /* Nothing to do */
+ }
+ }
+ }
+}
+
+/**
+ * @brief Wraps up transmission in non-blocking mode.
+ * @param husart Pointer to a USART_HandleTypeDef structure that contains
+ * the configuration information for the specified USART module.
+ * @retval None
+ */
+static void USART_EndTransmit_IT(USART_HandleTypeDef *husart)
+{
+ /* Disable the USART Transmit Complete Interrupt */
+ __HAL_USART_DISABLE_IT(husart, USART_IT_TC);
+
+ /* Disable the USART Error Interrupt: (Frame error, noise error, overrun error) */
+ __HAL_USART_DISABLE_IT(husart, USART_IT_ERR);
+
+ /* Clear TxISR function pointer */
+ husart->TxISR = NULL;
+
+ if (husart->State == HAL_USART_STATE_BUSY_TX)
+ {
+ /* Clear overrun flag and discard the received data */
+ __HAL_USART_CLEAR_OREFLAG(husart);
+ __HAL_USART_SEND_REQ(husart, USART_RXDATA_FLUSH_REQUEST);
+
+ /* Tx process is completed, restore husart->State to Ready */
+ husart->State = HAL_USART_STATE_READY;
+
+#if (USE_HAL_USART_REGISTER_CALLBACKS == 1)
+ /* Call registered Tx Complete Callback */
+ husart->TxCpltCallback(husart);
+#else
+ /* Call legacy weak Tx Complete Callback */
+ HAL_USART_TxCpltCallback(husart);
+#endif /* USE_HAL_USART_REGISTER_CALLBACKS */
+ }
+ else if (husart->RxXferCount == 0U)
+ {
+ /* TxRx process is completed, restore husart->State to Ready */
+ husart->State = HAL_USART_STATE_READY;
+
+#if (USE_HAL_USART_REGISTER_CALLBACKS == 1)
+ /* Call registered Tx Rx Complete Callback */
+ husart->TxRxCpltCallback(husart);
+#else
+ /* Call legacy weak Tx Rx Complete Callback */
+ HAL_USART_TxRxCpltCallback(husart);
+#endif /* USE_HAL_USART_REGISTER_CALLBACKS */
+ }
+ else
+ {
+ /* Nothing to do */
+ }
+}
+
+
+/**
+ * @brief Simplex receive an amount of data in non-blocking mode.
+ * @note Function called under interruption only, once
+ * interruptions have been enabled by HAL_USART_Receive_IT().
+ * @note ISR function executed when FIFO mode is disabled and when the
+ * data word length is less than 9 bits long.
+ * @param husart USART handle
+ * @retval None
+ */
+static void USART_RxISR_8BIT(USART_HandleTypeDef *husart)
+{
+ const HAL_USART_StateTypeDef state = husart->State;
+ uint16_t txdatacount;
+ uint16_t uhMask = husart->Mask;
+ uint32_t txftie;
+
+ if ((state == HAL_USART_STATE_BUSY_RX) ||
+ (state == HAL_USART_STATE_BUSY_TX_RX))
+ {
+ *husart->pRxBuffPtr = (uint8_t)(husart->Instance->RDR & (uint8_t)uhMask);
+ husart->pRxBuffPtr++;
+ husart->RxXferCount--;
+
+ if (husart->RxXferCount == 0U)
+ {
+ /* Disable the USART Parity Error Interrupt and RXNE interrupt*/
+ CLEAR_BIT(husart->Instance->CR1, (USART_CR1_RXNEIE_RXFNEIE | USART_CR1_PEIE));
+
+ /* Disable the USART Error Interrupt: (Frame error, noise error, overrun error) */
+ CLEAR_BIT(husart->Instance->CR3, USART_CR3_EIE);
+
+ /* Clear RxISR function pointer */
+ husart->RxISR = NULL;
+
+ /* txftie and txdatacount are temporary variables for MISRAC2012-Rule-13.5 */
+ txftie = READ_BIT(husart->Instance->CR3, USART_CR3_TXFTIE);
+ txdatacount = husart->TxXferCount;
+
+ if (state == HAL_USART_STATE_BUSY_RX)
+ {
+ /* Clear SPI slave underrun flag and discard transmit data */
+ if (husart->SlaveMode == USART_SLAVEMODE_ENABLE)
+ {
+ __HAL_USART_CLEAR_UDRFLAG(husart);
+ __HAL_USART_SEND_REQ(husart, USART_TXDATA_FLUSH_REQUEST);
+ }
+
+ /* Rx process is completed, restore husart->State to Ready */
+ husart->State = HAL_USART_STATE_READY;
+
+#if (USE_HAL_USART_REGISTER_CALLBACKS == 1)
+ /* Call registered Rx Complete Callback */
+ husart->RxCpltCallback(husart);
+#else
+ /* Call legacy weak Rx Complete Callback */
+ HAL_USART_RxCpltCallback(husart);
+#endif /* USE_HAL_USART_REGISTER_CALLBACKS */
+ }
+ else if ((READ_BIT(husart->Instance->CR1, USART_CR1_TCIE) != USART_CR1_TCIE) &&
+ (txftie != USART_CR3_TXFTIE) &&
+ (txdatacount == 0U))
+ {
+ /* TxRx process is completed, restore husart->State to Ready */
+ husart->State = HAL_USART_STATE_READY;
+
+#if (USE_HAL_USART_REGISTER_CALLBACKS == 1)
+ /* Call registered Tx Rx Complete Callback */
+ husart->TxRxCpltCallback(husart);
+#else
+ /* Call legacy weak Tx Rx Complete Callback */
+ HAL_USART_TxRxCpltCallback(husart);
+#endif /* USE_HAL_USART_REGISTER_CALLBACKS */
+ }
+ else
+ {
+ /* Nothing to do */
+ }
+ }
+ else if ((state == HAL_USART_STATE_BUSY_RX) &&
+ (husart->SlaveMode == USART_SLAVEMODE_DISABLE))
+ {
+ /* Send dummy byte in order to generate the clock for the Slave to Send the next data */
+ husart->Instance->TDR = (USART_DUMMY_DATA & (uint16_t)0x00FF);
+ }
+ else
+ {
+ /* Nothing to do */
+ }
+ }
+}
+
+/**
+ * @brief Simplex receive an amount of data in non-blocking mode.
+ * @note Function called under interruption only, once
+ * interruptions have been enabled by HAL_USART_Receive_IT().
+ * @note ISR function executed when FIFO mode is disabled and when the
+ * data word length is 9 bits long.
+ * @param husart USART handle
+ * @retval None
+ */
+static void USART_RxISR_16BIT(USART_HandleTypeDef *husart)
+{
+ const HAL_USART_StateTypeDef state = husart->State;
+ uint16_t txdatacount;
+ uint16_t *tmp;
+ uint16_t uhMask = husart->Mask;
+ uint32_t txftie;
+
+ if ((state == HAL_USART_STATE_BUSY_RX) ||
+ (state == HAL_USART_STATE_BUSY_TX_RX))
+ {
+ tmp = (uint16_t *) husart->pRxBuffPtr;
+ *tmp = (uint16_t)(husart->Instance->RDR & uhMask);
+ husart->pRxBuffPtr += 2U;
+ husart->RxXferCount--;
+
+ if (husart->RxXferCount == 0U)
+ {
+ /* Disable the USART Parity Error Interrupt and RXNE interrupt*/
+ CLEAR_BIT(husart->Instance->CR1, (USART_CR1_RXNEIE_RXFNEIE | USART_CR1_PEIE));
+
+ /* Disable the USART Error Interrupt: (Frame error, noise error, overrun error) */
+ CLEAR_BIT(husart->Instance->CR3, USART_CR3_EIE);
+
+ /* Clear RxISR function pointer */
+ husart->RxISR = NULL;
+
+ /* txftie and txdatacount are temporary variables for MISRAC2012-Rule-13.5 */
+ txftie = READ_BIT(husart->Instance->CR3, USART_CR3_TXFTIE);
+ txdatacount = husart->TxXferCount;
+
+ if (state == HAL_USART_STATE_BUSY_RX)
+ {
+ /* Clear SPI slave underrun flag and discard transmit data */
+ if (husart->SlaveMode == USART_SLAVEMODE_ENABLE)
+ {
+ __HAL_USART_CLEAR_UDRFLAG(husart);
+ __HAL_USART_SEND_REQ(husart, USART_TXDATA_FLUSH_REQUEST);
+ }
+
+ /* Rx process is completed, restore husart->State to Ready */
+ husart->State = HAL_USART_STATE_READY;
+
+#if (USE_HAL_USART_REGISTER_CALLBACKS == 1)
+ /* Call registered Rx Complete Callback */
+ husart->RxCpltCallback(husart);
+#else
+ /* Call legacy weak Rx Complete Callback */
+ HAL_USART_RxCpltCallback(husart);
+#endif /* USE_HAL_USART_REGISTER_CALLBACKS */
+ }
+ else if ((READ_BIT(husart->Instance->CR1, USART_CR1_TCIE) != USART_CR1_TCIE) &&
+ (txftie != USART_CR3_TXFTIE) &&
+ (txdatacount == 0U))
+ {
+ /* TxRx process is completed, restore husart->State to Ready */
+ husart->State = HAL_USART_STATE_READY;
+
+#if (USE_HAL_USART_REGISTER_CALLBACKS == 1)
+ /* Call registered Tx Rx Complete Callback */
+ husart->TxRxCpltCallback(husart);
+#else
+ /* Call legacy weak Tx Rx Complete Callback */
+ HAL_USART_TxRxCpltCallback(husart);
+#endif /* USE_HAL_USART_REGISTER_CALLBACKS */
+ }
+ else
+ {
+ /* Nothing to do */
+ }
+ }
+ else if ((state == HAL_USART_STATE_BUSY_RX) &&
+ (husart->SlaveMode == USART_SLAVEMODE_DISABLE))
+ {
+ /* Send dummy byte in order to generate the clock for the Slave to Send the next data */
+ husart->Instance->TDR = (USART_DUMMY_DATA & (uint16_t)0x00FF);
+ }
+ else
+ {
+ /* Nothing to do */
+ }
+ }
+}
+
+/**
+ * @brief Simplex receive an amount of data in non-blocking mode.
+ * @note Function called under interruption only, once
+ * interruptions have been enabled by HAL_USART_Receive_IT().
+ * @note ISR function executed when FIFO mode is enabled and when the
+ * data word length is less than 9 bits long.
+ * @param husart USART handle
+ * @retval None
+ */
+static void USART_RxISR_8BIT_FIFOEN(USART_HandleTypeDef *husart)
+{
+ HAL_USART_StateTypeDef state = husart->State;
+ uint16_t txdatacount;
+ uint16_t rxdatacount;
+ uint16_t uhMask = husart->Mask;
+ uint16_t nb_rx_data;
+ uint32_t txftie;
+
+ /* Check that a Rx process is ongoing */
+ if ((state == HAL_USART_STATE_BUSY_RX) ||
+ (state == HAL_USART_STATE_BUSY_TX_RX))
+ {
+ for (nb_rx_data = husart->NbRxDataToProcess ; nb_rx_data > 0U ; nb_rx_data--)
+ {
+ if (__HAL_USART_GET_FLAG(husart, USART_FLAG_RXFNE) == SET)
+ {
+ *husart->pRxBuffPtr = (uint8_t)(husart->Instance->RDR & (uint8_t)(uhMask & 0xFFU));
+ husart->pRxBuffPtr++;
+ husart->RxXferCount--;
+
+ if (husart->RxXferCount == 0U)
+ {
+ /* Disable the USART Parity Error Interrupt */
+ CLEAR_BIT(husart->Instance->CR1, USART_CR1_PEIE);
+
+ /* Disable the USART Error Interrupt: (Frame error, noise error, overrun error) and RX FIFO Threshold interrupt */
+ CLEAR_BIT(husart->Instance->CR3, (USART_CR3_EIE | USART_CR3_RXFTIE));
+
+ /* Clear RxISR function pointer */
+ husart->RxISR = NULL;
+
+ /* txftie and txdatacount are temporary variables for MISRAC2012-Rule-13.5 */
+ txftie = READ_BIT(husart->Instance->CR3, USART_CR3_TXFTIE);
+ txdatacount = husart->TxXferCount;
+
+ if (state == HAL_USART_STATE_BUSY_RX)
+ {
+ /* Clear SPI slave underrun flag and discard transmit data */
+ if (husart->SlaveMode == USART_SLAVEMODE_ENABLE)
+ {
+ __HAL_USART_CLEAR_UDRFLAG(husart);
+ __HAL_USART_SEND_REQ(husart, USART_TXDATA_FLUSH_REQUEST);
+ }
+
+ /* Rx process is completed, restore husart->State to Ready */
+ husart->State = HAL_USART_STATE_READY;
+ state = HAL_USART_STATE_READY;
+
+#if (USE_HAL_USART_REGISTER_CALLBACKS == 1)
+ /* Call registered Rx Complete Callback */
+ husart->RxCpltCallback(husart);
+#else
+ /* Call legacy weak Rx Complete Callback */
+ HAL_USART_RxCpltCallback(husart);
+#endif /* USE_HAL_USART_REGISTER_CALLBACKS */
+ }
+ else if ((READ_BIT(husart->Instance->CR1, USART_CR1_TCIE) != USART_CR1_TCIE) &&
+ (txftie != USART_CR3_TXFTIE) &&
+ (txdatacount == 0U))
+ {
+ /* TxRx process is completed, restore husart->State to Ready */
+ husart->State = HAL_USART_STATE_READY;
+ state = HAL_USART_STATE_READY;
+
+#if (USE_HAL_USART_REGISTER_CALLBACKS == 1)
+ /* Call registered Tx Rx Complete Callback */
+ husart->TxRxCpltCallback(husart);
+#else
+ /* Call legacy weak Tx Rx Complete Callback */
+ HAL_USART_TxRxCpltCallback(husart);
+#endif /* USE_HAL_USART_REGISTER_CALLBACKS */
+ }
+ else
+ {
+ /* Nothing to do */
+ }
+ }
+ else if ((state == HAL_USART_STATE_BUSY_RX) &&
+ (husart->SlaveMode == USART_SLAVEMODE_DISABLE))
+ {
+ /* Send dummy byte in order to generate the clock for the Slave to Send the next data */
+ husart->Instance->TDR = (USART_DUMMY_DATA & (uint16_t)0x00FF);
+ }
+ else
+ {
+ /* Nothing to do */
+ }
+ }
+ }
+
+ /* When remaining number of bytes to receive is less than the RX FIFO
+ threshold, next incoming frames are processed as if FIFO mode was
+ disabled (i.e. one interrupt per received frame).
+ */
+ rxdatacount = husart->RxXferCount;
+ if (((rxdatacount != 0U)) && (rxdatacount < husart->NbRxDataToProcess))
+ {
+ /* Disable the USART RXFT interrupt*/
+ CLEAR_BIT(husart->Instance->CR3, USART_CR3_RXFTIE);
+
+ /* Update the RxISR function pointer */
+ husart->RxISR = USART_RxISR_8BIT;
+
+ /* Enable the USART Data Register Not Empty interrupt */
+ SET_BIT(husart->Instance->CR1, USART_CR1_RXNEIE_RXFNEIE);
+
+ if ((husart->TxXferCount == 0U) &&
+ (state == HAL_USART_STATE_BUSY_TX_RX) &&
+ (husart->SlaveMode == USART_SLAVEMODE_DISABLE))
+ {
+ /* Send dummy byte in order to generate the clock for the Slave to Send the next data */
+ husart->Instance->TDR = (USART_DUMMY_DATA & (uint16_t)0x00FF);
+ }
+ }
+ }
+ else
+ {
+ /* Clear RXNE interrupt flag */
+ __HAL_USART_SEND_REQ(husart, USART_RXDATA_FLUSH_REQUEST);
+ }
+}
+
+/**
+ * @brief Simplex receive an amount of data in non-blocking mode.
+ * @note Function called under interruption only, once
+ * interruptions have been enabled by HAL_USART_Receive_IT().
+ * @note ISR function executed when FIFO mode is enabled and when the
+ * data word length is 9 bits long.
+ * @param husart USART handle
+ * @retval None
+ */
+static void USART_RxISR_16BIT_FIFOEN(USART_HandleTypeDef *husart)
+{
+ HAL_USART_StateTypeDef state = husart->State;
+ uint16_t txdatacount;
+ uint16_t rxdatacount;
+ uint16_t *tmp;
+ uint16_t uhMask = husart->Mask;
+ uint16_t nb_rx_data;
+ uint32_t txftie;
+
+ /* Check that a Tx process is ongoing */
+ if ((state == HAL_USART_STATE_BUSY_RX) ||
+ (state == HAL_USART_STATE_BUSY_TX_RX))
+ {
+ for (nb_rx_data = husart->NbRxDataToProcess ; nb_rx_data > 0U ; nb_rx_data--)
+ {
+ if (__HAL_USART_GET_FLAG(husart, USART_FLAG_RXFNE) == SET)
+ {
+ tmp = (uint16_t *) husart->pRxBuffPtr;
+ *tmp = (uint16_t)(husart->Instance->RDR & uhMask);
+ husart->pRxBuffPtr += 2U;
+ husart->RxXferCount--;
+
+ if (husart->RxXferCount == 0U)
+ {
+ /* Disable the USART Parity Error Interrupt */
+ CLEAR_BIT(husart->Instance->CR1, USART_CR1_PEIE);
+
+ /* Disable the USART Error Interrupt: (Frame error, noise error, overrun error) and RX FIFO Threshold interrupt */
+ CLEAR_BIT(husart->Instance->CR3, (USART_CR3_EIE | USART_CR3_RXFTIE));
+
+ /* Clear RxISR function pointer */
+ husart->RxISR = NULL;
+
+ /* txftie and txdatacount are temporary variables for MISRAC2012-Rule-13.5 */
+ txftie = READ_BIT(husart->Instance->CR3, USART_CR3_TXFTIE);
+ txdatacount = husart->TxXferCount;
+
+ if (state == HAL_USART_STATE_BUSY_RX)
+ {
+ /* Clear SPI slave underrun flag and discard transmit data */
+ if (husart->SlaveMode == USART_SLAVEMODE_ENABLE)
+ {
+ __HAL_USART_CLEAR_UDRFLAG(husart);
+ __HAL_USART_SEND_REQ(husart, USART_TXDATA_FLUSH_REQUEST);
+ }
+
+ /* Rx process is completed, restore husart->State to Ready */
+ husart->State = HAL_USART_STATE_READY;
+ state = HAL_USART_STATE_READY;
+
+#if (USE_HAL_USART_REGISTER_CALLBACKS == 1)
+ /* Call registered Rx Complete Callback */
+ husart->RxCpltCallback(husart);
+#else
+ /* Call legacy weak Rx Complete Callback */
+ HAL_USART_RxCpltCallback(husart);
+#endif /* USE_HAL_USART_REGISTER_CALLBACKS */
+ }
+ else if ((READ_BIT(husart->Instance->CR1, USART_CR1_TCIE) != USART_CR1_TCIE) &&
+ (txftie != USART_CR3_TXFTIE) &&
+ (txdatacount == 0U))
+ {
+ /* TxRx process is completed, restore husart->State to Ready */
+ husart->State = HAL_USART_STATE_READY;
+ state = HAL_USART_STATE_READY;
+
+#if (USE_HAL_USART_REGISTER_CALLBACKS == 1)
+ /* Call registered Tx Rx Complete Callback */
+ husart->TxRxCpltCallback(husart);
+#else
+ /* Call legacy weak Tx Rx Complete Callback */
+ HAL_USART_TxRxCpltCallback(husart);
+#endif /* USE_HAL_USART_REGISTER_CALLBACKS */
+ }
+ else
+ {
+ /* Nothing to do */
+ }
+ }
+ else if ((state == HAL_USART_STATE_BUSY_RX) &&
+ (husart->SlaveMode == USART_SLAVEMODE_DISABLE))
+ {
+ /* Send dummy byte in order to generate the clock for the Slave to Send the next data */
+ husart->Instance->TDR = (USART_DUMMY_DATA & (uint16_t)0x00FF);
+ }
+ else
+ {
+ /* Nothing to do */
+ }
+ }
+ }
+
+ /* When remaining number of bytes to receive is less than the RX FIFO
+ threshold, next incoming frames are processed as if FIFO mode was
+ disabled (i.e. one interrupt per received frame).
+ */
+ rxdatacount = husart->RxXferCount;
+ if (((rxdatacount != 0U)) && (rxdatacount < husart->NbRxDataToProcess))
+ {
+ /* Disable the USART RXFT interrupt*/
+ CLEAR_BIT(husart->Instance->CR3, USART_CR3_RXFTIE);
+
+ /* Update the RxISR function pointer */
+ husart->RxISR = USART_RxISR_16BIT;
+
+ /* Enable the USART Data Register Not Empty interrupt */
+ SET_BIT(husart->Instance->CR1, USART_CR1_RXNEIE_RXFNEIE);
+
+ if ((husart->TxXferCount == 0U) &&
+ (state == HAL_USART_STATE_BUSY_TX_RX) &&
+ (husart->SlaveMode == USART_SLAVEMODE_DISABLE))
+ {
+ /* Send dummy byte in order to generate the clock for the Slave to Send the next data */
+ husart->Instance->TDR = (USART_DUMMY_DATA & (uint16_t)0x00FF);
+ }
+ }
+ }
+ else
+ {
+ /* Clear RXNE interrupt flag */
+ __HAL_USART_SEND_REQ(husart, USART_RXDATA_FLUSH_REQUEST);
+ }
+}
+
+/**
+ * @}
+ */
+
+#endif /* HAL_USART_MODULE_ENABLED */
+/**
+ * @}
+ */
+
+/**
+ * @}
+ */
+
+/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
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