| /** |
| ****************************************************************************** |
| * @file stm32l0xx_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 HAL_USART_RegisterCallback() to register a user callback. |
| Function 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. |
| (+) 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 HAL_USART_UnRegisterCallback() to reset a callback to the default |
| weak (surcharged) function. |
| 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. |
| (+) MspInitCallback : USART MspInit. |
| (+) MspDeInitCallback : USART MspDeInit. |
| |
| [..] |
| By default, after the HAL_USART_Init() and when the state is HAL_USART_STATE_RESET |
| all callbacks are set to the corresponding weak (surcharged) functions: |
| examples HAL_USART_TxCpltCallback(), HAL_USART_RxHalfCpltCallback(). |
| Exception done for MspInit and MspDeInit functions that are respectively |
| reset to the legacy weak (surcharged) functions in the HAL_USART_Init() |
| and HAL_USART_DeInit() only when these callbacks are null (not registered beforehand). |
| If not, MspInit or MspDeInit are not null, the HAL_USART_Init() and 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 HAL_USART_RegisterCallback() before calling HAL_USART_DeInit() |
| or 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) 2016 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 "stm32l0xx_hal.h" |
| |
| /** @addtogroup STM32L0xx_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 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 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_EndTransmit_IT(USART_HandleTypeDef *husart); |
| static void USART_RxISR_8BIT(USART_HandleTypeDef *husart); |
| static void USART_RxISR_16BIT(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_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_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 USART Callback |
| * USART callaback is redirected to the weak predefined callback |
| * @param husart usart 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_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_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 USART 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. |
| * @note When USART parity is not enabled (PCE = 0), and Word Length is configured to 9 bits (M1-M0 = 01), |
| * address of user data buffer containing data to be sent, should be aligned on a half word frontier (16 bits) |
| * (as sent data will be handled using u16 pointer cast). Depending on compilation chain, |
| * use of specific alignment compilation directives or pragmas might be required |
| * to ensure proper alignment for 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; |
| } |
| |
| /* In case of 9bits/No Parity transfer, pTxData buffer provided as input parameter |
| should be aligned on a u16 frontier, as data to be filled into TDR will be |
| handled through a u16 cast. */ |
| if ((husart->Init.WordLength == USART_WORDLENGTH_9B) && (husart->Init.Parity == USART_PARITY_NONE)) |
| { |
| if ((((uint32_t)pTxData) & 1U) != 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 management */ |
| 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 USART 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. |
| * @note When USART parity is not enabled (PCE = 0), and Word Length is configured to 9 bits (M1-M0 = 01), |
| * address of user data buffer for storing data to be received, should be aligned on a half word frontier (16 bits) |
| * (as received data will be handled using u16 pointer cast). Depending on compilation chain, |
| * use of specific alignment compilation directives or pragmas might be required to ensure proper alignment for 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; |
| } |
| |
| /* In case of 9bits/No Parity transfer, pRxData buffer provided as input parameter |
| should be aligned on a u16 frontier, as data to be received from RDR will be |
| handled through a u16 cast. */ |
| if ((husart->Init.WordLength == USART_WORDLENGTH_9B) && (husart->Init.Parity == USART_PARITY_NONE)) |
| { |
| if ((((uint32_t)pRxData) & 1U) != 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 management */ |
| 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) |
| { |
| { |
| /* 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--; |
| |
| } |
| |
| |
| /* 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 USART 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. |
| * @note When USART parity is not enabled (PCE = 0), and Word Length is configured to 9 bits (M1-M0 = 01), |
| * address of user data buffers containing data to be sent/received, should be aligned on a half word frontier (16 bits) |
| * (as sent/received data will be handled using u16 pointer cast). Depending on compilation chain, |
| * use of specific alignment compilation directives or pragmas might be required to ensure proper alignment for pTxData and 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; |
| } |
| |
| /* In case of 9bits/No Parity transfer, pTxData and pRxData buffers provided as input parameter |
| should be aligned on a u16 frontier, as data to be filled into TDR/retrieved from RDR will be |
| handled through a u16 cast. */ |
| if ((husart->Init.WordLength == USART_WORDLENGTH_9B) && (husart->Init.Parity == USART_PARITY_NONE)) |
| { |
| if (((((uint32_t)pTxData) & 1U) != 0U) || ((((uint32_t)pRxData) & 1U) != 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 management */ |
| 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) |
| { |
| /* 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 USART 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. |
| * @note When USART parity is not enabled (PCE = 0), and Word Length is configured to 9 bits (M1-M0 = 01), |
| * address of user data buffer containing data to be sent, should be aligned on a half word frontier (16 bits) |
| * (as sent data will be handled using u16 pointer cast). Depending on compilation chain, |
| * use of specific alignment compilation directives or pragmas might be required to ensure proper alignment for 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; |
| } |
| |
| /* In case of 9bits/No Parity transfer, pTxData buffer provided as input parameter |
| should be aligned on a u16 frontier, as data to be filled into TDR will be |
| handled through a u16 cast. */ |
| if ((husart->Init.WordLength == USART_WORDLENGTH_9B) && (husart->Init.Parity == USART_PARITY_NONE)) |
| { |
| if ((((uint32_t)pTxData) & 1U) != 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" */ |
| |
| { |
| /* 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 USART 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. |
| * @note When USART parity is not enabled (PCE = 0), and Word Length is configured to 9 bits (M1-M0 = 01), |
| * address of user data buffer for storing data to be received, should be aligned on a half word frontier (16 bits) |
| * (as received data will be handled using u16 pointer cast). Depending on compilation chain, |
| * use of specific alignment compilation directives or pragmas might be required to ensure proper alignment for 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) |
| { |
| |
| if (husart->State == HAL_USART_STATE_READY) |
| { |
| if ((pRxData == NULL) || (Size == 0U)) |
| { |
| return HAL_ERROR; |
| } |
| |
| /* In case of 9bits/No Parity transfer, pRxData buffer provided as input parameter |
| should be aligned on a u16 frontier, as data to be received from RDR will be |
| handled through a u16 cast. */ |
| if ((husart->Init.WordLength == USART_WORDLENGTH_9B) && (husart->Init.Parity == USART_PARITY_NONE)) |
| { |
| if ((((uint32_t)pRxData) & 1U) != 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); |
| |
| { |
| /* 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 */ |
| if (husart->Init.Parity != USART_PARITY_NONE) |
| { |
| SET_BIT(husart->Instance->CR1, USART_CR1_PEIE | USART_CR1_RXNEIE); |
| } |
| else |
| { |
| SET_BIT(husart->Instance->CR1, USART_CR1_RXNEIE); |
| } |
| } |
| |
| { |
| /* Send dummy data in order to generate the clock for the Slave to send the next data. |
| */ |
| { |
| 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 USART 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. |
| * @note When USART parity is not enabled (PCE = 0), and Word Length is configured to 9 bits (M1-M0 = 01), |
| * address of user data buffers containing data to be sent/received, should be aligned on a half word frontier (16 bits) |
| * (as sent/received data will be handled using u16 pointer cast). Depending on compilation chain, |
| * use of specific alignment compilation directives or pragmas might be required to ensure proper alignment for pTxData and 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; |
| } |
| |
| /* In case of 9bits/No Parity transfer, pTxData and pRxData buffers provided as input parameter |
| should be aligned on a u16 frontier, as data to be filled into TDR/retrieved from RDR will be |
| handled through a u16 cast. */ |
| if ((husart->Init.WordLength == USART_WORDLENGTH_9B) && (husart->Init.Parity == USART_PARITY_NONE)) |
| { |
| if (((((uint32_t)pTxData) & 1U) != 0U) || ((((uint32_t)pRxData) & 1U) != 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; |
| |
| { |
| 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 */ |
| if (husart->Init.Parity != USART_PARITY_NONE) |
| { |
| SET_BIT(husart->Instance->CR1, USART_CR1_PEIE | USART_CR1_RXNEIE); |
| } |
| else |
| { |
| SET_BIT(husart->Instance->CR1, USART_CR1_RXNEIE); |
| } |
| |
| /* Enable the USART Transmit Data Register Empty Interrupt */ |
| SET_BIT(husart->Instance->CR1, USART_CR1_TXEIE); |
| } |
| |
| return HAL_OK; |
| } |
| else |
| { |
| return HAL_BUSY; |
| } |
| } |
| |
| /** |
| * @brief Send an amount of data in DMA mode. |
| * @note When USART 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. |
| * @note When USART parity is not enabled (PCE = 0), and Word Length is configured to 9 bits (M1-M0 = 01), |
| * address of user data buffer containing data to be sent, should be aligned on a half word frontier (16 bits) |
| * (as sent data will be handled by DMA from halfword frontier). Depending on compilation chain, |
| * use of specific alignment compilation directives or pragmas might be required |
| * to ensure proper alignment for 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; |
| } |
| |
| /* In case of 9bits/No Parity transfer, pTxData buffer provided as input parameter |
| should be aligned on a u16 frontier, as data copy into TDR will be |
| handled by DMA from a u16 frontier. */ |
| if ((husart->Init.WordLength == USART_WORDLENGTH_9B) && (husart->Init.Parity == USART_PARITY_NONE)) |
| { |
| if ((((uint32_t)pTxData) & 1U) != 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 USART 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. |
| * @note When USART parity is not enabled (PCE = 0), and Word Length is configured to 9 bits (M1-M0 = 01), |
| * address of user data buffer for storing data to be received, should be aligned on |
| * a half word frontier (16 bits) (as received data will be handled by DMA from halfword frontier). |
| * Depending on compilation chain, use of specific alignment compilation directives or pragmas |
| * might be required to ensure proper alignment for 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; |
| } |
| |
| /* In case of 9bits/No Parity transfer, pRxData buffer provided as input parameter |
| should be aligned on a u16 frontier, as data copy from RDR will be |
| handled by DMA from a u16 frontier. */ |
| if ((husart->Init.WordLength == USART_WORDLENGTH_9B) && (husart->Init.Parity == USART_PARITY_NONE)) |
| { |
| if ((((uint32_t)pRxData) & 1U) != 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); |
| } |
| |
| { |
| /* 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); |
| |
| if (husart->Init.Parity != USART_PARITY_NONE) |
| { |
| /* 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 USART 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. |
| * @note When USART parity is not enabled (PCE = 0), and Word Length is configured to 9 bits (M1-M0 = 01), |
| * address of user data buffers containing data to be sent/received, should be aligned on a half word frontier |
| * (16 bits) (as sent/received data will be handled by DMA from halfword frontier). Depending on compilation |
| * chain, use of specific alignment compilation directives or pragmas might be required |
| * to ensure proper alignment for pTxData and 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; |
| } |
| |
| /* In case of 9bits/No Parity transfer, pTxData and pRxData buffers provided as input parameter |
| should be aligned on a u16 frontier, as data copy to/from TDR/RDR will be |
| handled by DMA from a u16 frontier. */ |
| if ((husart->Init.WordLength == USART_WORDLENGTH_9B) && (husart->Init.Parity == USART_PARITY_NONE)) |
| { |
| if (((((uint32_t)pTxData) & 1U) != 0U) || ((((uint32_t)pRxData) & 1U) != 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); |
| |
| if (husart->Init.Parity != USART_PARITY_NONE) |
| { |
| /* 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); |
| |
| /* Re-enable PE and ERR (Frame error, noise error, overrun error) interrupts */ |
| if (husart->Init.Parity != USART_PARITY_NONE) |
| { |
| 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) |
| { |
| CLEAR_BIT(husart->Instance->CR1, (USART_CR1_RXNEIE | USART_CR1_PEIE | USART_CR1_TXEIE | USART_CR1_TCIE)); |
| CLEAR_BIT(husart->Instance->CR3, USART_CR3_EIE); |
| |
| /* 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); |
| |
| |
| /* 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; |
| |
| CLEAR_BIT(husart->Instance->CR1, (USART_CR1_RXNEIE | USART_CR1_PEIE | USART_CR1_TXEIE | USART_CR1_TCIE)); |
| CLEAR_BIT(husart->Instance->CR3, USART_CR3_EIE); |
| |
| /* 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); |
| |
| |
| /* 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)); |
| if (errorflags == 0U) |
| { |
| /* USART in mode Receiver ---------------------------------------------------*/ |
| if (((isrflags & USART_ISR_RXNE) != 0U) |
| && ((cr1its & USART_CR1_RXNEIE) != 0U)) |
| { |
| if (husart->RxISR != NULL) |
| { |
| husart->RxISR(husart); |
| } |
| return; |
| } |
| } |
| |
| /* If some errors occur */ |
| if ((errorflags != 0U) |
| && (((cr3its & USART_CR3_EIE) != 0U) |
| || ((cr1its & (USART_CR1_RXNEIE | 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) != 0U) || |
| ((cr3its & 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_USART_CLEAR_IT(husart, USART_CLEAR_RTOF); |
| |
| husart->ErrorCode |= HAL_USART_ERROR_RTO; |
| } |
| |
| |
| /* 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) != 0U) |
| && ((cr1its & USART_CR1_RXNEIE) != 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) != 0U) |
| && ((cr1its & USART_CR1_TXEIE) != 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; |
| } |
| |
| } |
| |
| /** |
| * @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 */ |
| } |
| #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, PE and ERR (Frame error, noise error, overrun error) interrupts */ |
| CLEAR_BIT(husart->Instance->CR1, (USART_CR1_RXNEIE | USART_CR1_PEIE | USART_CR1_TXEIE | USART_CR1_TCIE)); |
| CLEAR_BIT(husart->Instance->CR3, USART_CR3_EIE); |
| |
| /* 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 (HAL_IS_BIT_CLR(hdma->Instance->CCR, DMA_CCR_CIRC)) |
| { |
| 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 (HAL_IS_BIT_CLR(hdma->Instance->CCR, DMA_CCR_CIRC)) |
| { |
| 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; |
| 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)); |
| |
| /*-------------------------- 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 and STOP 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 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_PCLK1: |
| pclk = HAL_RCC_GetPCLK1Freq(); |
| usartdiv = (uint32_t)(USART_DIV_SAMPLING8(pclk, husart->Init.BaudRate)); |
| break; |
| case USART_CLOCKSOURCE_PCLK2: |
| pclk = HAL_RCC_GetPCLK2Freq(); |
| usartdiv = (uint32_t)(USART_DIV_SAMPLING8(pclk, husart->Init.BaudRate)); |
| break; |
| case USART_CLOCKSOURCE_HSI: |
| if (__HAL_RCC_GET_FLAG(RCC_FLAG_HSIDIV) != 0U) |
| { |
| usartdiv = (uint32_t)(USART_DIV_SAMPLING8((HSI_VALUE >> 2U), husart->Init.BaudRate)); |
| } |
| else |
| { |
| usartdiv = (uint32_t)(USART_DIV_SAMPLING8(HSI_VALUE, husart->Init.BaudRate)); |
| } |
| break; |
| case USART_CLOCKSOURCE_SYSCLK: |
| pclk = HAL_RCC_GetSysClockFreq(); |
| usartdiv = (uint32_t)(USART_DIV_SAMPLING8(pclk, husart->Init.BaudRate)); |
| break; |
| case USART_CLOCKSOURCE_LSE: |
| usartdiv = (uint32_t)(USART_DIV_SAMPLING8(LSE_VALUE, husart->Init.BaudRate)); |
| 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; |
| } |
| |
| |
| /* 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 management */ |
| 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 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 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 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 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; |
| |
| 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 | 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; |
| |
| /* txdatacount is a temporary variable for MISRAC2012-Rule-13.5 */ |
| txdatacount = husart->TxXferCount; |
| |
| if (state == HAL_USART_STATE_BUSY_RX) |
| { |
| |
| /* 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) && |
| (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) |
| { |
| /* 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 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; |
| |
| 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 | 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; |
| |
| /* txdatacount is a temporary variable for MISRAC2012-Rule-13.5 */ |
| txdatacount = husart->TxXferCount; |
| |
| if (state == HAL_USART_STATE_BUSY_RX) |
| { |
| |
| /* 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) && |
| (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) |
| { |
| /* 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 */ |
| } |
| } |
| } |
| |
| |
| /** |
| * @} |
| */ |
| |
| #endif /* HAL_USART_MODULE_ENABLED */ |
| /** |
| * @} |
| */ |
| |
| /** |
| * @} |
| */ |
| |
| /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/ |
