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/**
******************************************************************************
* @file stm32f4xx_hal_uart.c
* @author MCD Application Team
* @brief UART HAL module driver.
* This file provides firmware functions to manage the following
* functionalities of the Universal Asynchronous Receiver Transmitter Peripheral (UART).
* + Initialization and de-initialization functions
* + IO operation functions
* + Peripheral Control functions
* + Peripheral State and Errors functions
*
******************************************************************************
* @attention
*
* Copyright (c) 2016 STMicroelectronics.
* All rights reserved.
*
* This software is licensed under terms that can be found in the LICENSE file
* in the root directory of this software component.
* If no LICENSE file comes with this software, it is provided AS-IS.
*
******************************************************************************
@verbatim
==============================================================================
##### How to use this driver #####
==============================================================================
[..]
The UART HAL driver can be used as follows:
(#) Declare a UART_HandleTypeDef handle structure (eg. UART_HandleTypeDef huart).
(#) Initialize the UART low level resources by implementing the HAL_UART_MspInit() API:
(##) Enable the USARTx interface clock.
(##) UART pins configuration:
(+++) Enable the clock for the UART GPIOs.
(+++) Configure the UART TX/RX pins as alternate function pull-up.
(##) NVIC configuration if you need to use interrupt process (HAL_UART_Transmit_IT()
and HAL_UART_Receive_IT() APIs):
(+++) Configure the USARTx interrupt priority.
(+++) Enable the NVIC USART IRQ handle.
(##) DMA Configuration if you need to use DMA process (HAL_UART_Transmit_DMA()
and HAL_UART_Receive_DMA() APIs):
(+++) Declare a DMA handle structure for the Tx/Rx stream.
(+++) Enable the DMAx interface clock.
(+++) Configure the declared DMA handle structure with the required
Tx/Rx parameters.
(+++) Configure the DMA Tx/Rx stream.
(+++) Associate the initialized DMA handle to the UART DMA Tx/Rx handle.
(+++) Configure the priority and enable the NVIC for the transfer complete
interrupt on the DMA Tx/Rx stream.
(+++) Configure the USARTx interrupt priority and enable the NVIC USART IRQ handle
(used for last byte sending completion detection in DMA non circular mode)
(#) Program the Baud Rate, Word Length, Stop Bit, Parity, Hardware
flow control and Mode(Receiver/Transmitter) in the huart Init structure.
(#) For the UART asynchronous mode, initialize the UART registers by calling
the HAL_UART_Init() API.
(#) For the UART Half duplex mode, initialize the UART registers by calling
the HAL_HalfDuplex_Init() API.
(#) For the LIN mode, initialize the UART registers by calling the HAL_LIN_Init() API.
(#) For the Multi-Processor mode, initialize the UART registers by calling
the HAL_MultiProcessor_Init() API.
[..]
(@) The specific UART interrupts (Transmission complete interrupt,
RXNE interrupt and Error Interrupts) will be managed using the macros
__HAL_UART_ENABLE_IT() and __HAL_UART_DISABLE_IT() inside the transmit
and receive process.
[..]
(@) These APIs (HAL_UART_Init() and HAL_HalfDuplex_Init()) configure also the
low level Hardware GPIO, CLOCK, CORTEX...etc) by calling the customized
HAL_UART_MspInit() API.
##### Callback registration #####
==================================
[..]
The compilation define USE_HAL_UART_REGISTER_CALLBACKS when set to 1
allows the user to configure dynamically the driver callbacks.
[..]
Use Function HAL_UART_RegisterCallback() to register a user callback.
Function HAL_UART_RegisterCallback() allows to register following callbacks:
(+) TxHalfCpltCallback : Tx Half Complete Callback.
(+) TxCpltCallback : Tx Complete Callback.
(+) RxHalfCpltCallback : Rx Half Complete Callback.
(+) RxCpltCallback : Rx Complete Callback.
(+) ErrorCallback : Error Callback.
(+) AbortCpltCallback : Abort Complete Callback.
(+) AbortTransmitCpltCallback : Abort Transmit Complete Callback.
(+) AbortReceiveCpltCallback : Abort Receive Complete Callback.
(+) MspInitCallback : UART MspInit.
(+) MspDeInitCallback : UART MspDeInit.
This function takes as parameters the HAL peripheral handle, the Callback ID
and a pointer to the user callback function.
[..]
Use function HAL_UART_UnRegisterCallback() to reset a callback to the default
weak (surcharged) function.
HAL_UART_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.
(+) ErrorCallback : Error Callback.
(+) AbortCpltCallback : Abort Complete Callback.
(+) AbortTransmitCpltCallback : Abort Transmit Complete Callback.
(+) AbortReceiveCpltCallback : Abort Receive Complete Callback.
(+) MspInitCallback : UART MspInit.
(+) MspDeInitCallback : UART MspDeInit.
[..]
For specific callback RxEventCallback, use dedicated registration/reset functions:
respectively HAL_UART_RegisterRxEventCallback() , HAL_UART_UnRegisterRxEventCallback().
[..]
By default, after the HAL_UART_Init() and when the state is HAL_UART_STATE_RESET
all callbacks are set to the corresponding weak (surcharged) functions:
examples HAL_UART_TxCpltCallback(), HAL_UART_RxHalfCpltCallback().
Exception done for MspInit and MspDeInit functions that are respectively
reset to the legacy weak (surcharged) functions in the HAL_UART_Init()
and HAL_UART_DeInit() only when these callbacks are null (not registered beforehand).
If not, MspInit or MspDeInit are not null, the HAL_UART_Init() and HAL_UART_DeInit()
keep and use the user MspInit/MspDeInit callbacks (registered beforehand).
[..]
Callbacks can be registered/unregistered in HAL_UART_STATE_READY state only.
Exception done MspInit/MspDeInit that can be registered/unregistered
in HAL_UART_STATE_READY or HAL_UART_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_UART_RegisterCallback() before calling HAL_UART_DeInit()
or HAL_UART_Init() function.
[..]
When The compilation define USE_HAL_UART_REGISTER_CALLBACKS is set to 0 or
not defined, the callback registration feature is not available
and weak (surcharged) callbacks are used.
[..]
Three operation modes are available within this driver :
*** Polling mode IO operation ***
=================================
[..]
(+) Send an amount of data in blocking mode using HAL_UART_Transmit()
(+) Receive an amount of data in blocking mode using HAL_UART_Receive()
*** Interrupt mode IO operation ***
===================================
[..]
(+) Send an amount of data in non blocking mode using HAL_UART_Transmit_IT()
(+) At transmission end of transfer HAL_UART_TxCpltCallback is executed and user can
add his own code by customization of function pointer HAL_UART_TxCpltCallback
(+) Receive an amount of data in non blocking mode using HAL_UART_Receive_IT()
(+) At reception end of transfer HAL_UART_RxCpltCallback is executed and user can
add his own code by customization of function pointer HAL_UART_RxCpltCallback
(+) In case of transfer Error, HAL_UART_ErrorCallback() function is executed and user can
add his own code by customization of function pointer HAL_UART_ErrorCallback
*** DMA mode IO operation ***
==============================
[..]
(+) Send an amount of data in non blocking mode (DMA) using HAL_UART_Transmit_DMA()
(+) At transmission end of half transfer HAL_UART_TxHalfCpltCallback is executed and user can
add his own code by customization of function pointer HAL_UART_TxHalfCpltCallback
(+) At transmission end of transfer HAL_UART_TxCpltCallback is executed and user can
add his own code by customization of function pointer HAL_UART_TxCpltCallback
(+) Receive an amount of data in non blocking mode (DMA) using HAL_UART_Receive_DMA()
(+) At reception end of half transfer HAL_UART_RxHalfCpltCallback is executed and user can
add his own code by customization of function pointer HAL_UART_RxHalfCpltCallback
(+) At reception end of transfer HAL_UART_RxCpltCallback is executed and user can
add his own code by customization of function pointer HAL_UART_RxCpltCallback
(+) In case of transfer Error, HAL_UART_ErrorCallback() function is executed and user can
add his own code by customization of function pointer HAL_UART_ErrorCallback
(+) Pause the DMA Transfer using HAL_UART_DMAPause()
(+) Resume the DMA Transfer using HAL_UART_DMAResume()
(+) Stop the DMA Transfer using HAL_UART_DMAStop()
[..] This subsection also provides a set of additional functions providing enhanced reception
services to user. (For example, these functions allow application to handle use cases
where number of data to be received is unknown).
(#) Compared to standard reception services which only consider number of received
data elements as reception completion criteria, these functions also consider additional events
as triggers for updating reception status to caller :
(+) Detection of inactivity period (RX line has not been active for a given period).
(++) RX inactivity detected by IDLE event, i.e. RX line has been in idle state (normally high state)
for 1 frame time, after last received byte.
(#) There are two mode of transfer:
(+) Blocking mode: The reception is performed in polling mode, until either expected number of data is received,
or till IDLE event occurs. Reception is handled only during function execution.
When function exits, no data reception could occur. HAL status and number of actually received data elements,
are returned by function after finishing transfer.
(+) Non-Blocking mode: The reception 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 UART IRQ when using Interrupt mode or the DMA IRQ when using DMA mode.
The HAL_UARTEx_RxEventCallback() user callback will be executed during Receive process
The HAL_UART_ErrorCallback()user callback will be executed when a reception error is detected.
(#) Blocking mode API:
(+) HAL_UARTEx_ReceiveToIdle()
(#) Non-Blocking mode API with Interrupt:
(+) HAL_UARTEx_ReceiveToIdle_IT()
(#) Non-Blocking mode API with DMA:
(+) HAL_UARTEx_ReceiveToIdle_DMA()
*** UART HAL driver macros list ***
=============================================
[..]
Below the list of most used macros in UART HAL driver.
(+) __HAL_UART_ENABLE: Enable the UART peripheral
(+) __HAL_UART_DISABLE: Disable the UART peripheral
(+) __HAL_UART_GET_FLAG : Check whether the specified UART flag is set or not
(+) __HAL_UART_CLEAR_FLAG : Clear the specified UART pending flag
(+) __HAL_UART_ENABLE_IT: Enable the specified UART interrupt
(+) __HAL_UART_DISABLE_IT: Disable the specified UART interrupt
(+) __HAL_UART_GET_IT_SOURCE: Check whether the specified UART interrupt has occurred or not
[..]
(@) You can refer to the UART HAL driver header file for more useful macros
@endverbatim
[..]
(@) Additional remark: 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.
Depending on the frame length defined by the M bit (8-bits or 9-bits),
the possible UART frame formats are as listed in the following table:
+-------------------------------------------------------------+
| M bit | PCE bit | UART frame |
|---------------------|---------------------------------------|
| 0 | 0 | | SB | 8 bit data | STB | |
|---------|-----------|---------------------------------------|
| 0 | 1 | | SB | 7 bit data | PB | STB | |
|---------|-----------|---------------------------------------|
| 1 | 0 | | SB | 9 bit data | STB | |
|---------|-----------|---------------------------------------|
| 1 | 1 | | SB | 8 bit data | PB | STB | |
+-------------------------------------------------------------+
******************************************************************************
*/
/* Includes ------------------------------------------------------------------*/
#include "stm32f4xx_hal.h"
/** @addtogroup STM32F4xx_HAL_Driver
* @{
*/
/** @defgroup UART UART
* @brief HAL UART module driver
* @{
*/
#ifdef HAL_UART_MODULE_ENABLED
/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/** @addtogroup UART_Private_Constants
* @{
*/
/**
* @}
*/
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* Private function prototypes -----------------------------------------------*/
/** @addtogroup UART_Private_Functions UART Private Functions
* @{
*/
#if (USE_HAL_UART_REGISTER_CALLBACKS == 1)
void UART_InitCallbacksToDefault(UART_HandleTypeDef *huart);
#endif /* USE_HAL_UART_REGISTER_CALLBACKS */
static void UART_EndTxTransfer(UART_HandleTypeDef *huart);
static void UART_EndRxTransfer(UART_HandleTypeDef *huart);
static void UART_DMATransmitCplt(DMA_HandleTypeDef *hdma);
static void UART_DMAReceiveCplt(DMA_HandleTypeDef *hdma);
static void UART_DMATxHalfCplt(DMA_HandleTypeDef *hdma);
static void UART_DMARxHalfCplt(DMA_HandleTypeDef *hdma);
static void UART_DMAError(DMA_HandleTypeDef *hdma);
static void UART_DMAAbortOnError(DMA_HandleTypeDef *hdma);
static void UART_DMATxAbortCallback(DMA_HandleTypeDef *hdma);
static void UART_DMARxAbortCallback(DMA_HandleTypeDef *hdma);
static void UART_DMATxOnlyAbortCallback(DMA_HandleTypeDef *hdma);
static void UART_DMARxOnlyAbortCallback(DMA_HandleTypeDef *hdma);
static HAL_StatusTypeDef UART_Transmit_IT(UART_HandleTypeDef *huart);
static HAL_StatusTypeDef UART_EndTransmit_IT(UART_HandleTypeDef *huart);
static HAL_StatusTypeDef UART_Receive_IT(UART_HandleTypeDef *huart);
static HAL_StatusTypeDef UART_WaitOnFlagUntilTimeout(UART_HandleTypeDef *huart, uint32_t Flag, FlagStatus Status,
uint32_t Tickstart, uint32_t Timeout);
static void UART_SetConfig(UART_HandleTypeDef *huart);
/**
* @}
*/
/* Exported functions ---------------------------------------------------------*/
/** @defgroup UART_Exported_Functions UART Exported Functions
* @{
*/
/** @defgroup UART_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 USARTx or the UARTy
in asynchronous mode.
(+) 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.
Depending on the frame length defined by the M bit (8-bits or 9-bits),
please refer to Reference manual for possible UART frame formats.
(++) Hardware flow control
(++) Receiver/transmitter modes
(++) Over Sampling Method
[..]
The HAL_UART_Init(), HAL_HalfDuplex_Init(), HAL_LIN_Init() and HAL_MultiProcessor_Init() APIs
follow respectively the UART asynchronous, UART Half duplex, LIN and Multi-Processor configuration
procedures (details for the procedures are available in reference manual
(RM0430 for STM32F4X3xx MCUs and RM0402 for STM32F412xx MCUs
RM0383 for STM32F411xC/E MCUs and RM0401 for STM32F410xx MCUs
RM0090 for STM32F4X5xx/STM32F4X7xx/STM32F429xx/STM32F439xx MCUs
RM0390 for STM32F446xx MCUs and RM0386 for STM32F469xx/STM32F479xx MCUs)).
@endverbatim
* @{
*/
/**
* @brief Initializes the UART mode according to the specified parameters in
* the UART_InitTypeDef and create the associated handle.
* @param huart Pointer to a UART_HandleTypeDef structure that contains
* the configuration information for the specified UART module.
* @retval HAL status
*/
HAL_StatusTypeDef HAL_UART_Init(UART_HandleTypeDef *huart)
{
/* Check the UART handle allocation */
if (huart == NULL)
{
return HAL_ERROR;
}
/* Check the parameters */
if (huart->Init.HwFlowCtl != UART_HWCONTROL_NONE)
{
/* The hardware flow control is available only for USART1, USART2, USART3 and USART6.
Except for STM32F446xx devices, that is available for USART1, USART2, USART3, USART6, UART4 and UART5.
*/
assert_param(IS_UART_HWFLOW_INSTANCE(huart->Instance));
assert_param(IS_UART_HARDWARE_FLOW_CONTROL(huart->Init.HwFlowCtl));
}
else
{
assert_param(IS_UART_INSTANCE(huart->Instance));
}
assert_param(IS_UART_WORD_LENGTH(huart->Init.WordLength));
assert_param(IS_UART_OVERSAMPLING(huart->Init.OverSampling));
if (huart->gState == HAL_UART_STATE_RESET)
{
/* Allocate lock resource and initialize it */
huart->Lock = HAL_UNLOCKED;
#if (USE_HAL_UART_REGISTER_CALLBACKS == 1)
UART_InitCallbacksToDefault(huart);
if (huart->MspInitCallback == NULL)
{
huart->MspInitCallback = HAL_UART_MspInit;
}
/* Init the low level hardware */
huart->MspInitCallback(huart);
#else
/* Init the low level hardware : GPIO, CLOCK */
HAL_UART_MspInit(huart);
#endif /* (USE_HAL_UART_REGISTER_CALLBACKS) */
}
huart->gState = HAL_UART_STATE_BUSY;
/* Disable the peripheral */
__HAL_UART_DISABLE(huart);
/* Set the UART Communication parameters */
UART_SetConfig(huart);
/* In asynchronous mode, the following bits must be kept cleared:
- LINEN and CLKEN bits in the USART_CR2 register,
- SCEN, HDSEL and IREN bits in the USART_CR3 register.*/
CLEAR_BIT(huart->Instance->CR2, (USART_CR2_LINEN | USART_CR2_CLKEN));
CLEAR_BIT(huart->Instance->CR3, (USART_CR3_SCEN | USART_CR3_HDSEL | USART_CR3_IREN));
/* Enable the peripheral */
__HAL_UART_ENABLE(huart);
/* Initialize the UART state */
huart->ErrorCode = HAL_UART_ERROR_NONE;
huart->gState = HAL_UART_STATE_READY;
huart->RxState = HAL_UART_STATE_READY;
huart->RxEventType = HAL_UART_RXEVENT_TC;
return HAL_OK;
}
/**
* @brief Initializes the half-duplex mode according to the specified
* parameters in the UART_InitTypeDef and create the associated handle.
* @param huart Pointer to a UART_HandleTypeDef structure that contains
* the configuration information for the specified UART module.
* @retval HAL status
*/
HAL_StatusTypeDef HAL_HalfDuplex_Init(UART_HandleTypeDef *huart)
{
/* Check the UART handle allocation */
if (huart == NULL)
{
return HAL_ERROR;
}
/* Check the parameters */
assert_param(IS_UART_HALFDUPLEX_INSTANCE(huart->Instance));
assert_param(IS_UART_WORD_LENGTH(huart->Init.WordLength));
assert_param(IS_UART_OVERSAMPLING(huart->Init.OverSampling));
if (huart->gState == HAL_UART_STATE_RESET)
{
/* Allocate lock resource and initialize it */
huart->Lock = HAL_UNLOCKED;
#if (USE_HAL_UART_REGISTER_CALLBACKS == 1)
UART_InitCallbacksToDefault(huart);
if (huart->MspInitCallback == NULL)
{
huart->MspInitCallback = HAL_UART_MspInit;
}
/* Init the low level hardware */
huart->MspInitCallback(huart);
#else
/* Init the low level hardware : GPIO, CLOCK */
HAL_UART_MspInit(huart);
#endif /* (USE_HAL_UART_REGISTER_CALLBACKS) */
}
huart->gState = HAL_UART_STATE_BUSY;
/* Disable the peripheral */
__HAL_UART_DISABLE(huart);
/* Set the UART Communication parameters */
UART_SetConfig(huart);
/* In half-duplex mode, the following bits must be kept cleared:
- LINEN and CLKEN bits in the USART_CR2 register,
- SCEN and IREN bits in the USART_CR3 register.*/
CLEAR_BIT(huart->Instance->CR2, (USART_CR2_LINEN | USART_CR2_CLKEN));
CLEAR_BIT(huart->Instance->CR3, (USART_CR3_IREN | USART_CR3_SCEN));
/* Enable the Half-Duplex mode by setting the HDSEL bit in the CR3 register */
SET_BIT(huart->Instance->CR3, USART_CR3_HDSEL);
/* Enable the peripheral */
__HAL_UART_ENABLE(huart);
/* Initialize the UART state*/
huart->ErrorCode = HAL_UART_ERROR_NONE;
huart->gState = HAL_UART_STATE_READY;
huart->RxState = HAL_UART_STATE_READY;
huart->RxEventType = HAL_UART_RXEVENT_TC;
return HAL_OK;
}
/**
* @brief Initializes the LIN mode according to the specified
* parameters in the UART_InitTypeDef and create the associated handle.
* @param huart Pointer to a UART_HandleTypeDef structure that contains
* the configuration information for the specified UART module.
* @param BreakDetectLength Specifies the LIN break detection length.
* This parameter can be one of the following values:
* @arg UART_LINBREAKDETECTLENGTH_10B: 10-bit break detection
* @arg UART_LINBREAKDETECTLENGTH_11B: 11-bit break detection
* @retval HAL status
*/
HAL_StatusTypeDef HAL_LIN_Init(UART_HandleTypeDef *huart, uint32_t BreakDetectLength)
{
/* Check the UART handle allocation */
if (huart == NULL)
{
return HAL_ERROR;
}
/* Check the LIN UART instance */
assert_param(IS_UART_LIN_INSTANCE(huart->Instance));
/* Check the Break detection length parameter */
assert_param(IS_UART_LIN_BREAK_DETECT_LENGTH(BreakDetectLength));
assert_param(IS_UART_LIN_WORD_LENGTH(huart->Init.WordLength));
assert_param(IS_UART_LIN_OVERSAMPLING(huart->Init.OverSampling));
if (huart->gState == HAL_UART_STATE_RESET)
{
/* Allocate lock resource and initialize it */
huart->Lock = HAL_UNLOCKED;
#if (USE_HAL_UART_REGISTER_CALLBACKS == 1)
UART_InitCallbacksToDefault(huart);
if (huart->MspInitCallback == NULL)
{
huart->MspInitCallback = HAL_UART_MspInit;
}
/* Init the low level hardware */
huart->MspInitCallback(huart);
#else
/* Init the low level hardware : GPIO, CLOCK */
HAL_UART_MspInit(huart);
#endif /* (USE_HAL_UART_REGISTER_CALLBACKS) */
}
huart->gState = HAL_UART_STATE_BUSY;
/* Disable the peripheral */
__HAL_UART_DISABLE(huart);
/* Set the UART Communication parameters */
UART_SetConfig(huart);
/* In LIN mode, the following bits must be kept cleared:
- CLKEN bits in the USART_CR2 register,
- SCEN, HDSEL and IREN bits in the USART_CR3 register.*/
CLEAR_BIT(huart->Instance->CR2, (USART_CR2_CLKEN));
CLEAR_BIT(huart->Instance->CR3, (USART_CR3_HDSEL | USART_CR3_IREN | USART_CR3_SCEN));
/* Enable the LIN mode by setting the LINEN bit in the CR2 register */
SET_BIT(huart->Instance->CR2, USART_CR2_LINEN);
/* Set the USART LIN Break detection length. */
CLEAR_BIT(huart->Instance->CR2, USART_CR2_LBDL);
SET_BIT(huart->Instance->CR2, BreakDetectLength);
/* Enable the peripheral */
__HAL_UART_ENABLE(huart);
/* Initialize the UART state*/
huart->ErrorCode = HAL_UART_ERROR_NONE;
huart->gState = HAL_UART_STATE_READY;
huart->RxState = HAL_UART_STATE_READY;
huart->RxEventType = HAL_UART_RXEVENT_TC;
return HAL_OK;
}
/**
* @brief Initializes the Multi-Processor mode according to the specified
* parameters in the UART_InitTypeDef and create the associated handle.
* @param huart Pointer to a UART_HandleTypeDef structure that contains
* the configuration information for the specified UART module.
* @param Address USART address
* @param WakeUpMethod specifies the USART wake-up method.
* This parameter can be one of the following values:
* @arg UART_WAKEUPMETHOD_IDLELINE: Wake-up by an idle line detection
* @arg UART_WAKEUPMETHOD_ADDRESSMARK: Wake-up by an address mark
* @retval HAL status
*/
HAL_StatusTypeDef HAL_MultiProcessor_Init(UART_HandleTypeDef *huart, uint8_t Address, uint32_t WakeUpMethod)
{
/* Check the UART handle allocation */
if (huart == NULL)
{
return HAL_ERROR;
}
/* Check the parameters */
assert_param(IS_UART_INSTANCE(huart->Instance));
/* Check the Address & wake up method parameters */
assert_param(IS_UART_WAKEUPMETHOD(WakeUpMethod));
assert_param(IS_UART_ADDRESS(Address));
assert_param(IS_UART_WORD_LENGTH(huart->Init.WordLength));
assert_param(IS_UART_OVERSAMPLING(huart->Init.OverSampling));
if (huart->gState == HAL_UART_STATE_RESET)
{
/* Allocate lock resource and initialize it */
huart->Lock = HAL_UNLOCKED;
#if (USE_HAL_UART_REGISTER_CALLBACKS == 1)
UART_InitCallbacksToDefault(huart);
if (huart->MspInitCallback == NULL)
{
huart->MspInitCallback = HAL_UART_MspInit;
}
/* Init the low level hardware */
huart->MspInitCallback(huart);
#else
/* Init the low level hardware : GPIO, CLOCK */
HAL_UART_MspInit(huart);
#endif /* (USE_HAL_UART_REGISTER_CALLBACKS) */
}
huart->gState = HAL_UART_STATE_BUSY;
/* Disable the peripheral */
__HAL_UART_DISABLE(huart);
/* Set the UART Communication parameters */
UART_SetConfig(huart);
/* In Multi-Processor mode, the following bits must be kept cleared:
- LINEN and CLKEN bits in the USART_CR2 register,
- SCEN, HDSEL and IREN bits in the USART_CR3 register */
CLEAR_BIT(huart->Instance->CR2, (USART_CR2_LINEN | USART_CR2_CLKEN));
CLEAR_BIT(huart->Instance->CR3, (USART_CR3_SCEN | USART_CR3_HDSEL | USART_CR3_IREN));
/* Set the USART address node */
CLEAR_BIT(huart->Instance->CR2, USART_CR2_ADD);
SET_BIT(huart->Instance->CR2, Address);
/* Set the wake up method by setting the WAKE bit in the CR1 register */
CLEAR_BIT(huart->Instance->CR1, USART_CR1_WAKE);
SET_BIT(huart->Instance->CR1, WakeUpMethod);
/* Enable the peripheral */
__HAL_UART_ENABLE(huart);
/* Initialize the UART state */
huart->ErrorCode = HAL_UART_ERROR_NONE;
huart->gState = HAL_UART_STATE_READY;
huart->RxState = HAL_UART_STATE_READY;
huart->RxEventType = HAL_UART_RXEVENT_TC;
return HAL_OK;
}
/**
* @brief DeInitializes the UART peripheral.
* @param huart Pointer to a UART_HandleTypeDef structure that contains
* the configuration information for the specified UART module.
* @retval HAL status
*/
HAL_StatusTypeDef HAL_UART_DeInit(UART_HandleTypeDef *huart)
{
/* Check the UART handle allocation */
if (huart == NULL)
{
return HAL_ERROR;
}
/* Check the parameters */
assert_param(IS_UART_INSTANCE(huart->Instance));
huart->gState = HAL_UART_STATE_BUSY;
/* Disable the Peripheral */
__HAL_UART_DISABLE(huart);
#if (USE_HAL_UART_REGISTER_CALLBACKS == 1)
if (huart->MspDeInitCallback == NULL)
{
huart->MspDeInitCallback = HAL_UART_MspDeInit;
}
/* DeInit the low level hardware */
huart->MspDeInitCallback(huart);
#else
/* DeInit the low level hardware */
HAL_UART_MspDeInit(huart);
#endif /* (USE_HAL_UART_REGISTER_CALLBACKS) */
huart->ErrorCode = HAL_UART_ERROR_NONE;
huart->gState = HAL_UART_STATE_RESET;
huart->RxState = HAL_UART_STATE_RESET;
huart->ReceptionType = HAL_UART_RECEPTION_STANDARD;
huart->RxEventType = HAL_UART_RXEVENT_TC;
/* Process Unlock */
__HAL_UNLOCK(huart);
return HAL_OK;
}
/**
* @brief UART MSP Init.
* @param huart Pointer to a UART_HandleTypeDef structure that contains
* the configuration information for the specified UART module.
* @retval None
*/
__weak void HAL_UART_MspInit(UART_HandleTypeDef *huart)
{
/* Prevent unused argument(s) compilation warning */
UNUSED(huart);
/* NOTE: This function should not be modified, when the callback is needed,
the HAL_UART_MspInit could be implemented in the user file
*/
}
/**
* @brief UART MSP DeInit.
* @param huart Pointer to a UART_HandleTypeDef structure that contains
* the configuration information for the specified UART module.
* @retval None
*/
__weak void HAL_UART_MspDeInit(UART_HandleTypeDef *huart)
{
/* Prevent unused argument(s) compilation warning */
UNUSED(huart);
/* NOTE: This function should not be modified, when the callback is needed,
the HAL_UART_MspDeInit could be implemented in the user file
*/
}
#if (USE_HAL_UART_REGISTER_CALLBACKS == 1)
/**
* @brief Register a User UART Callback
* To be used instead of the weak predefined callback
* @note The HAL_UART_RegisterCallback() may be called before HAL_UART_Init(), HAL_HalfDuplex_Init(), HAL_LIN_Init(),
* HAL_MultiProcessor_Init() to register callbacks for HAL_UART_MSPINIT_CB_ID and HAL_UART_MSPDEINIT_CB_ID
* @param huart uart handle
* @param CallbackID ID of the callback to be registered
* This parameter can be one of the following values:
* @arg @ref HAL_UART_TX_HALFCOMPLETE_CB_ID Tx Half Complete Callback ID
* @arg @ref HAL_UART_TX_COMPLETE_CB_ID Tx Complete Callback ID
* @arg @ref HAL_UART_RX_HALFCOMPLETE_CB_ID Rx Half Complete Callback ID
* @arg @ref HAL_UART_RX_COMPLETE_CB_ID Rx Complete Callback ID
* @arg @ref HAL_UART_ERROR_CB_ID Error Callback ID
* @arg @ref HAL_UART_ABORT_COMPLETE_CB_ID Abort Complete Callback ID
* @arg @ref HAL_UART_ABORT_TRANSMIT_COMPLETE_CB_ID Abort Transmit Complete Callback ID
* @arg @ref HAL_UART_ABORT_RECEIVE_COMPLETE_CB_ID Abort Receive Complete Callback ID
* @arg @ref HAL_UART_MSPINIT_CB_ID MspInit Callback ID
* @arg @ref HAL_UART_MSPDEINIT_CB_ID MspDeInit Callback ID
* @param pCallback pointer to the Callback function
* @retval HAL status
*/
HAL_StatusTypeDef HAL_UART_RegisterCallback(UART_HandleTypeDef *huart, HAL_UART_CallbackIDTypeDef CallbackID,
pUART_CallbackTypeDef pCallback)
{
HAL_StatusTypeDef status = HAL_OK;
if (pCallback == NULL)
{
/* Update the error code */
huart->ErrorCode |= HAL_UART_ERROR_INVALID_CALLBACK;
return HAL_ERROR;
}
if (huart->gState == HAL_UART_STATE_READY)
{
switch (CallbackID)
{
case HAL_UART_TX_HALFCOMPLETE_CB_ID :
huart->TxHalfCpltCallback = pCallback;
break;
case HAL_UART_TX_COMPLETE_CB_ID :
huart->TxCpltCallback = pCallback;
break;
case HAL_UART_RX_HALFCOMPLETE_CB_ID :
huart->RxHalfCpltCallback = pCallback;
break;
case HAL_UART_RX_COMPLETE_CB_ID :
huart->RxCpltCallback = pCallback;
break;
case HAL_UART_ERROR_CB_ID :
huart->ErrorCallback = pCallback;
break;
case HAL_UART_ABORT_COMPLETE_CB_ID :
huart->AbortCpltCallback = pCallback;
break;
case HAL_UART_ABORT_TRANSMIT_COMPLETE_CB_ID :
huart->AbortTransmitCpltCallback = pCallback;
break;
case HAL_UART_ABORT_RECEIVE_COMPLETE_CB_ID :
huart->AbortReceiveCpltCallback = pCallback;
break;
case HAL_UART_MSPINIT_CB_ID :
huart->MspInitCallback = pCallback;
break;
case HAL_UART_MSPDEINIT_CB_ID :
huart->MspDeInitCallback = pCallback;
break;
default :
/* Update the error code */
huart->ErrorCode |= HAL_UART_ERROR_INVALID_CALLBACK;
/* Return error status */
status = HAL_ERROR;
break;
}
}
else if (huart->gState == HAL_UART_STATE_RESET)
{
switch (CallbackID)
{
case HAL_UART_MSPINIT_CB_ID :
huart->MspInitCallback = pCallback;
break;
case HAL_UART_MSPDEINIT_CB_ID :
huart->MspDeInitCallback = pCallback;
break;
default :
/* Update the error code */
huart->ErrorCode |= HAL_UART_ERROR_INVALID_CALLBACK;
/* Return error status */
status = HAL_ERROR;
break;
}
}
else
{
/* Update the error code */
huart->ErrorCode |= HAL_UART_ERROR_INVALID_CALLBACK;
/* Return error status */
status = HAL_ERROR;
}
return status;
}
/**
* @brief Unregister an UART Callback
* UART callaback is redirected to the weak predefined callback
* @note The HAL_UART_UnRegisterCallback() may be called before HAL_UART_Init(), HAL_HalfDuplex_Init(),
* HAL_LIN_Init(), HAL_MultiProcessor_Init() to un-register callbacks for HAL_UART_MSPINIT_CB_ID
* and HAL_UART_MSPDEINIT_CB_ID
* @param huart uart handle
* @param CallbackID ID of the callback to be unregistered
* This parameter can be one of the following values:
* @arg @ref HAL_UART_TX_HALFCOMPLETE_CB_ID Tx Half Complete Callback ID
* @arg @ref HAL_UART_TX_COMPLETE_CB_ID Tx Complete Callback ID
* @arg @ref HAL_UART_RX_HALFCOMPLETE_CB_ID Rx Half Complete Callback ID
* @arg @ref HAL_UART_RX_COMPLETE_CB_ID Rx Complete Callback ID
* @arg @ref HAL_UART_ERROR_CB_ID Error Callback ID
* @arg @ref HAL_UART_ABORT_COMPLETE_CB_ID Abort Complete Callback ID
* @arg @ref HAL_UART_ABORT_TRANSMIT_COMPLETE_CB_ID Abort Transmit Complete Callback ID
* @arg @ref HAL_UART_ABORT_RECEIVE_COMPLETE_CB_ID Abort Receive Complete Callback ID
* @arg @ref HAL_UART_MSPINIT_CB_ID MspInit Callback ID
* @arg @ref HAL_UART_MSPDEINIT_CB_ID MspDeInit Callback ID
* @retval HAL status
*/
HAL_StatusTypeDef HAL_UART_UnRegisterCallback(UART_HandleTypeDef *huart, HAL_UART_CallbackIDTypeDef CallbackID)
{
HAL_StatusTypeDef status = HAL_OK;
if (HAL_UART_STATE_READY == huart->gState)
{
switch (CallbackID)
{
case HAL_UART_TX_HALFCOMPLETE_CB_ID :
huart->TxHalfCpltCallback = HAL_UART_TxHalfCpltCallback; /* Legacy weak TxHalfCpltCallback */
break;
case HAL_UART_TX_COMPLETE_CB_ID :
huart->TxCpltCallback = HAL_UART_TxCpltCallback; /* Legacy weak TxCpltCallback */
break;
case HAL_UART_RX_HALFCOMPLETE_CB_ID :
huart->RxHalfCpltCallback = HAL_UART_RxHalfCpltCallback; /* Legacy weak RxHalfCpltCallback */
break;
case HAL_UART_RX_COMPLETE_CB_ID :
huart->RxCpltCallback = HAL_UART_RxCpltCallback; /* Legacy weak RxCpltCallback */
break;
case HAL_UART_ERROR_CB_ID :
huart->ErrorCallback = HAL_UART_ErrorCallback; /* Legacy weak ErrorCallback */
break;
case HAL_UART_ABORT_COMPLETE_CB_ID :
huart->AbortCpltCallback = HAL_UART_AbortCpltCallback; /* Legacy weak AbortCpltCallback */
break;
case HAL_UART_ABORT_TRANSMIT_COMPLETE_CB_ID :
huart->AbortTransmitCpltCallback = HAL_UART_AbortTransmitCpltCallback; /* Legacy weak AbortTransmitCpltCallback */
break;
case HAL_UART_ABORT_RECEIVE_COMPLETE_CB_ID :
huart->AbortReceiveCpltCallback = HAL_UART_AbortReceiveCpltCallback; /* Legacy weak AbortReceiveCpltCallback */
break;
case HAL_UART_MSPINIT_CB_ID :
huart->MspInitCallback = HAL_UART_MspInit; /* Legacy weak MspInitCallback */
break;
case HAL_UART_MSPDEINIT_CB_ID :
huart->MspDeInitCallback = HAL_UART_MspDeInit; /* Legacy weak MspDeInitCallback */
break;
default :
/* Update the error code */
huart->ErrorCode |= HAL_UART_ERROR_INVALID_CALLBACK;
/* Return error status */
status = HAL_ERROR;
break;
}
}
else if (HAL_UART_STATE_RESET == huart->gState)
{
switch (CallbackID)
{
case HAL_UART_MSPINIT_CB_ID :
huart->MspInitCallback = HAL_UART_MspInit;
break;
case HAL_UART_MSPDEINIT_CB_ID :
huart->MspDeInitCallback = HAL_UART_MspDeInit;
break;
default :
/* Update the error code */
huart->ErrorCode |= HAL_UART_ERROR_INVALID_CALLBACK;
/* Return error status */
status = HAL_ERROR;
break;
}
}
else
{
/* Update the error code */
huart->ErrorCode |= HAL_UART_ERROR_INVALID_CALLBACK;
/* Return error status */
status = HAL_ERROR;
}
return status;
}
/**
* @brief Register a User UART Rx Event Callback
* To be used instead of the weak predefined callback
* @param huart Uart handle
* @param pCallback Pointer to the Rx Event Callback function
* @retval HAL status
*/
HAL_StatusTypeDef HAL_UART_RegisterRxEventCallback(UART_HandleTypeDef *huart, pUART_RxEventCallbackTypeDef pCallback)
{
HAL_StatusTypeDef status = HAL_OK;
if (pCallback == NULL)
{
huart->ErrorCode |= HAL_UART_ERROR_INVALID_CALLBACK;
return HAL_ERROR;
}
/* Process locked */
__HAL_LOCK(huart);
if (huart->gState == HAL_UART_STATE_READY)
{
huart->RxEventCallback = pCallback;
}
else
{
huart->ErrorCode |= HAL_UART_ERROR_INVALID_CALLBACK;
status = HAL_ERROR;
}
/* Release Lock */
__HAL_UNLOCK(huart);
return status;
}
/**
* @brief UnRegister the UART Rx Event Callback
* UART Rx Event Callback is redirected to the weak HAL_UARTEx_RxEventCallback() predefined callback
* @param huart Uart handle
* @retval HAL status
*/
HAL_StatusTypeDef HAL_UART_UnRegisterRxEventCallback(UART_HandleTypeDef *huart)
{
HAL_StatusTypeDef status = HAL_OK;
/* Process locked */
__HAL_LOCK(huart);
if (huart->gState == HAL_UART_STATE_READY)
{
huart->RxEventCallback = HAL_UARTEx_RxEventCallback; /* Legacy weak UART Rx Event Callback */
}
else
{
huart->ErrorCode |= HAL_UART_ERROR_INVALID_CALLBACK;
status = HAL_ERROR;
}
/* Release Lock */
__HAL_UNLOCK(huart);
return status;
}
#endif /* USE_HAL_UART_REGISTER_CALLBACKS */
/**
* @}
*/
/** @defgroup UART_Exported_Functions_Group2 IO operation functions
* @brief UART Transmit and Receive functions
*
@verbatim
===============================================================================
##### IO operation functions #####
===============================================================================
This subsection provides a set of functions allowing to manage the UART asynchronous
and Half duplex data transfers.
(#) 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.
(+) Non-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 UART IRQ when using Interrupt mode or the DMA IRQ when
using DMA mode.
The HAL_UART_TxCpltCallback(), HAL_UART_RxCpltCallback() user callbacks
will be executed respectively at the end of the transmit or receive process
The HAL_UART_ErrorCallback()user callback will be executed when a communication error is detected.
(#) Blocking mode API's are :
(+) HAL_UART_Transmit()
(+) HAL_UART_Receive()
(#) Non-Blocking mode API's with Interrupt are :
(+) HAL_UART_Transmit_IT()
(+) HAL_UART_Receive_IT()
(+) HAL_UART_IRQHandler()
(#) Non-Blocking mode API's with DMA are :
(+) HAL_UART_Transmit_DMA()
(+) HAL_UART_Receive_DMA()
(+) HAL_UART_DMAPause()
(+) HAL_UART_DMAResume()
(+) HAL_UART_DMAStop()
(#) A set of Transfer Complete Callbacks are provided in Non_Blocking mode:
(+) HAL_UART_TxHalfCpltCallback()
(+) HAL_UART_TxCpltCallback()
(+) HAL_UART_RxHalfCpltCallback()
(+) HAL_UART_RxCpltCallback()
(+) HAL_UART_ErrorCallback()
(#) Non-Blocking mode transfers could be aborted using Abort API's :
(+) HAL_UART_Abort()
(+) HAL_UART_AbortTransmit()
(+) HAL_UART_AbortReceive()
(+) HAL_UART_Abort_IT()
(+) HAL_UART_AbortTransmit_IT()
(+) HAL_UART_AbortReceive_IT()
(#) For Abort services based on interrupts (HAL_UART_Abortxxx_IT), a set of Abort Complete Callbacks are provided:
(+) HAL_UART_AbortCpltCallback()
(+) HAL_UART_AbortTransmitCpltCallback()
(+) HAL_UART_AbortReceiveCpltCallback()
(#) A Rx Event Reception Callback (Rx event notification) is available for Non_Blocking modes of enhanced reception services:
(+) HAL_UARTEx_RxEventCallback()
(#) 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_UART_ErrorCallback() user callback is executed. Transfer is kept ongoing on UART 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_UART_ErrorCallback() user callback is executed.
-@- In the Half duplex communication, it is forbidden to run the transmit
and receive process in parallel, the UART state HAL_UART_STATE_BUSY_TX_RX can't be useful.
@endverbatim
* @{
*/
/**
* @brief Sends an amount of data in blocking mode.
* @note When UART parity is not enabled (PCE = 0), and Word Length is configured to 9 bits (M1-M0 = 01),
* the sent data is handled as a set of u16. In this case, Size must indicate the number
* of u16 provided through pData.
* @param huart Pointer to a UART_HandleTypeDef structure that contains
* the configuration information for the specified UART module.
* @param pData 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_UART_Transmit(UART_HandleTypeDef *huart, const uint8_t *pData, uint16_t Size, uint32_t Timeout)
{
const uint8_t *pdata8bits;
const uint16_t *pdata16bits;
uint32_t tickstart = 0U;
/* Check that a Tx process is not already ongoing */
if (huart->gState == HAL_UART_STATE_READY)
{
if ((pData == NULL) || (Size == 0U))
{
return HAL_ERROR;
}
huart->ErrorCode = HAL_UART_ERROR_NONE;
huart->gState = HAL_UART_STATE_BUSY_TX;
/* Init tickstart for timeout management */
tickstart = HAL_GetTick();
huart->TxXferSize = Size;
huart->TxXferCount = Size;
/* In case of 9bits/No Parity transfer, pData needs to be handled as a uint16_t pointer */
if ((huart->Init.WordLength == UART_WORDLENGTH_9B) && (huart->Init.Parity == UART_PARITY_NONE))
{
pdata8bits = NULL;
pdata16bits = (const uint16_t *) pData;
}
else
{
pdata8bits = pData;
pdata16bits = NULL;
}
while (huart->TxXferCount > 0U)
{
if (UART_WaitOnFlagUntilTimeout(huart, UART_FLAG_TXE, RESET, tickstart, Timeout) != HAL_OK)
{
huart->gState = HAL_UART_STATE_READY;
return HAL_TIMEOUT;
}
if (pdata8bits == NULL)
{
huart->Instance->DR = (uint16_t)(*pdata16bits & 0x01FFU);
pdata16bits++;
}
else
{
huart->Instance->DR = (uint8_t)(*pdata8bits & 0xFFU);
pdata8bits++;
}
huart->TxXferCount--;
}
if (UART_WaitOnFlagUntilTimeout(huart, UART_FLAG_TC, RESET, tickstart, Timeout) != HAL_OK)
{
huart->gState = HAL_UART_STATE_READY;
return HAL_TIMEOUT;
}
/* At end of Tx process, restore huart->gState to Ready */
huart->gState = HAL_UART_STATE_READY;
return HAL_OK;
}
else
{
return HAL_BUSY;
}
}
/**
* @brief Receives an amount of data in blocking mode.
* @note When UART parity is not enabled (PCE = 0), and Word Length is configured to 9 bits (M1-M0 = 01),
* the received data is handled as a set of u16. In this case, Size must indicate the number
* of u16 available through pData.
* @param huart Pointer to a UART_HandleTypeDef structure that contains
* the configuration information for the specified UART module.
* @param pData 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_UART_Receive(UART_HandleTypeDef *huart, uint8_t *pData, uint16_t Size, uint32_t Timeout)
{
uint8_t *pdata8bits;
uint16_t *pdata16bits;
uint32_t tickstart = 0U;
/* Check that a Rx process is not already ongoing */
if (huart->RxState == HAL_UART_STATE_READY)
{
if ((pData == NULL) || (Size == 0U))
{
return HAL_ERROR;
}
huart->ErrorCode = HAL_UART_ERROR_NONE;
huart->RxState = HAL_UART_STATE_BUSY_RX;
huart->ReceptionType = HAL_UART_RECEPTION_STANDARD;
/* Init tickstart for timeout management */
tickstart = HAL_GetTick();
huart->RxXferSize = Size;
huart->RxXferCount = Size;
/* In case of 9bits/No Parity transfer, pRxData needs to be handled as a uint16_t pointer */
if ((huart->Init.WordLength == UART_WORDLENGTH_9B) && (huart->Init.Parity == UART_PARITY_NONE))
{
pdata8bits = NULL;
pdata16bits = (uint16_t *) pData;
}
else
{
pdata8bits = pData;
pdata16bits = NULL;
}
/* Check the remain data to be received */
while (huart->RxXferCount > 0U)
{
if (UART_WaitOnFlagUntilTimeout(huart, UART_FLAG_RXNE, RESET, tickstart, Timeout) != HAL_OK)
{
huart->RxState = HAL_UART_STATE_READY;
return HAL_TIMEOUT;
}
if (pdata8bits == NULL)
{
*pdata16bits = (uint16_t)(huart->Instance->DR & 0x01FF);
pdata16bits++;
}
else
{
if ((huart->Init.WordLength == UART_WORDLENGTH_9B) || ((huart->Init.WordLength == UART_WORDLENGTH_8B) && (huart->Init.Parity == UART_PARITY_NONE)))
{
*pdata8bits = (uint8_t)(huart->Instance->DR & (uint8_t)0x00FF);
}
else
{
*pdata8bits = (uint8_t)(huart->Instance->DR & (uint8_t)0x007F);
}
pdata8bits++;
}
huart->RxXferCount--;
}
/* At end of Rx process, restore huart->RxState to Ready */
huart->RxState = HAL_UART_STATE_READY;
return HAL_OK;
}
else
{
return HAL_BUSY;
}
}
/**
* @brief Sends an amount of data in non blocking mode.
* @note When UART parity is not enabled (PCE = 0), and Word Length is configured to 9 bits (M1-M0 = 01),
* the sent data is handled as a set of u16. In this case, Size must indicate the number
* of u16 provided through pData.
* @param huart Pointer to a UART_HandleTypeDef structure that contains
* the configuration information for the specified UART module.
* @param pData 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_UART_Transmit_IT(UART_HandleTypeDef *huart, const uint8_t *pData, uint16_t Size)
{
/* Check that a Tx process is not already ongoing */
if (huart->gState == HAL_UART_STATE_READY)
{
if ((pData == NULL) || (Size == 0U))