Сама функция(по сути нечего не делает, просто передает данные в структуру и включает прерывание)
Спойлер
Код: Выделить всё
HAL_StatusTypeDef HAL_UART_Transmit_IT(UART_HandleTypeDef *huart, 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))
{
return HAL_ERROR;
}
/* Process Locked */
__HAL_LOCK(huart);
huart->pTxBuffPtr = pData;
huart->TxXferSize = Size;
huart->TxXferCount = Size;
huart->ErrorCode = HAL_UART_ERROR_NONE;
huart->gState = HAL_UART_STATE_BUSY_TX;
/* Process Unlocked */
__HAL_UNLOCK(huart);
/* Enable the UART Transmit data register empty Interrupt */
SET_BIT(huart->Instance->CR1, USART_CR1_TXEIE);
return HAL_OK;
}
else
{
return HAL_BUSY;
}
}
Вот сама структура:
Спойлер
Код: Выделить всё
typedef struct
{
USART_TypeDef *Instance; /*!< UART registers base address */
UART_InitTypeDef Init; /*!< UART communication parameters */
uint8_t *pTxBuffPtr; /*!< Pointer to UART Tx transfer Buffer */
uint16_t TxXferSize; /*!< UART Tx Transfer size */
uint16_t TxXferCount; /*!< UART Tx Transfer Counter */
uint8_t *pRxBuffPtr; /*!< Pointer to UART Rx transfer Buffer */
uint16_t RxXferSize; /*!< UART Rx Transfer size */
uint16_t RxXferCount; /*!< UART Rx Transfer Counter */
DMA_HandleTypeDef *hdmatx; /*!< UART Tx DMA Handle parameters */
DMA_HandleTypeDef *hdmarx; /*!< UART Rx DMA Handle parameters */
HAL_LockTypeDef Lock; /*!< Locking object */
__IO HAL_UART_StateTypeDef gState; /*!< UART state information related to global Handle management
and also related to Tx operations.
This parameter can be a value of @ref HAL_UART_StateTypeDef */
__IO HAL_UART_StateTypeDef RxState; /*!< UART state information related to Rx operations.
This parameter can be a value of @ref HAL_UART_StateTypeDef */
__IO uint32_t ErrorCode; /*!< UART Error code */
}UART_HandleTypeDef;
Далее срабатывает прерывание(Код большой, смотреть смысла не вижу)
Спойлер
Код: Выделить всё
void HAL_UART_IRQHandler(UART_HandleTypeDef *huart)
{
uint32_t isrflags = READ_REG(huart->Instance->SR);
uint32_t cr1its = READ_REG(huart->Instance->CR1);
uint32_t cr3its = READ_REG(huart->Instance->CR3);
uint32_t errorflags = 0x00U;
uint32_t dmarequest = 0x00U;
/* If no error occurs */
errorflags = (isrflags & (uint32_t)(USART_SR_PE | USART_SR_FE | USART_SR_ORE | USART_SR_NE));
if(errorflags == RESET)
{
/* UART in mode Receiver ----------*/
if(((isrflags & USART_SR_RXNE) != RESET) && ((cr1its & USART_CR1_RXNEIE) != RESET))
{
UART_Receive_IT(huart);
return;
}
}
/* If some errors occur */
if((errorflags != RESET) && ((cr3its & (USART_CR3_EIE | USART_CR1_PEIE)) != RESET))
{
/* UART parity error interrupt occurred ----------*/
if(((isrflags & USART_SR_PE) != RESET) && ((cr1its & USART_CR1_PEIE) != RESET))
{
huart->ErrorCode |= HAL_UART_ERROR_PE;
}
/* UART noise error interrupt occurred ----------*/
if(((isrflags & USART_SR_NE) != RESET) && ((cr3its & USART_CR3_EIE) != RESET))
{
huart->ErrorCode |= HAL_UART_ERROR_NE;
}
/* UART frame error interrupt occurred ----------*/
if(((isrflags & USART_SR_FE) != RESET) && ((cr3its & USART_CR3_EIE) != RESET))
{
huart->ErrorCode |= HAL_UART_ERROR_FE;
}
/* UART Over-Run interrupt occurred ----------*/
if(((isrflags & USART_SR_ORE) != RESET) && ((cr3its & USART_CR3_EIE) != RESET))
{
huart->ErrorCode |= HAL_UART_ERROR_ORE;
}
/* Call UART Error Call back function if need be ----------*/
if(huart->ErrorCode != HAL_UART_ERROR_NONE)
{
/* UART in mode Receiver ----------*/
if(((isrflags & USART_SR_RXNE) != RESET) && ((cr1its & USART_CR1_RXNEIE) != RESET))
{
UART_Receive_IT(huart);
}
/* If Overrun error occurs, or if any error occurs in DMA mode reception,
consider error as blocking */
dmarequest = HAL_IS_BIT_SET(huart->Instance->CR3, USART_CR3_DMAR);
if(((huart->ErrorCode & HAL_UART_ERROR_ORE) != RESET) || dmarequest)
{
/* Blocking error : transfer is aborted
Set the UART state ready to be able to start again the process,
Disable Rx Interrupts, and disable Rx DMA request, if ongoing */
UART_EndRxTransfer(huart);
/* Disable the UART DMA Rx request if enabled */
if(HAL_IS_BIT_SET(huart->Instance->CR3, USART_CR3_DMAR))
{
CLEAR_BIT(huart->Instance->CR3, USART_CR3_DMAR);
/* Abort the UART DMA Rx channel */
if(huart->hdmarx != NULL)
{
/* Set the UART DMA Abort callback :
will lead to call HAL_UART_ErrorCallback() at end of DMA abort procedure */
huart->hdmarx->XferAbortCallback = UART_DMAAbortOnError;
if(HAL_DMA_Abort_IT(huart->hdmarx) != HAL_OK)
{
/* Call Directly XferAbortCallback function in case of error */
huart->hdmarx->XferAbortCallback(huart->hdmarx);
}
}
else
{
/* Call user error callback */
HAL_UART_ErrorCallback(huart);
}
}
else
{
/* Call user error callback */
HAL_UART_ErrorCallback(huart);
}
}
else
{
/* Non Blocking error : transfer could go on.
Error is notified to user through user error callback */
HAL_UART_ErrorCallback(huart);
huart->ErrorCode = HAL_UART_ERROR_NONE;
}
}
return;
} /* End if some error occurs */
/* UART in mode Transmitter ----------*/
if(((isrflags & USART_SR_TXE) != RESET) && ((cr1its & USART_CR1_TXEIE) != RESET))
{
UART_Transmit_IT(huart);
return;
}
/* UART in mode Transmitter end ----------*/
if(((isrflags & USART_SR_TC) != RESET) && ((cr1its & USART_CR1_TCIE) != RESET))
{
UART_EndTransmit_IT(huart);
return;
}
}
И собственно самая интересная часть с которой проверяется включен ли режим 9бит:
Спойлер
Код: Выделить всё
static HAL_StatusTypeDef UART_Transmit_IT(UART_HandleTypeDef *huart)
{
uint16_t* tmp;
/* Check that a Tx process is ongoing */
if(huart->gState == HAL_UART_STATE_BUSY_TX)
{
if(huart->Init.WordLength == UART_WORDLENGTH_9B)
{
tmp = (uint16_t*) huart->pTxBuffPtr;
huart->Instance->DR = (uint16_t)(*tmp & (uint16_t)0x01FFU);
if(huart->Init.Parity == UART_PARITY_NONE)
{
huart->pTxBuffPtr += 2U;
}
else
{
huart->pTxBuffPtr += 1U;
}
}
else
{
huart->Instance->DR = (uint8_t)(*huart->pTxBuffPtr++ & (uint8_t)0x00FFU);
}
if(--huart->TxXferCount == 0U)
{
/* Disable the UART Transmit Complete Interrupt */
CLEAR_BIT(huart->Instance->CR1, USART_CR1_TXEIE);
/* Enable the UART Transmit Complete Interrupt */
SET_BIT(huart->Instance->CR1, USART_CR1_TCIE);
}
return HAL_OK;
}
else
{
return HAL_BUSY;
}
}
Собственно понять не могу это недоработка HAL или я не понял как передавать данные?
Спасибо откликнувшимся.