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) != RESET) || ((cr1its & (USART_CR1_RXNEIE | 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) && (((cr1its & USART_CR1_RXNEIE) != 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 */
#if (USE_HAL_UART_REGISTER_CALLBACKS == 1)
/*Call registered error callback*/
huart->ErrorCallback(huart);
#else
/*Call legacy weak error callback*/
HAL_UART_ErrorCallback(huart);
#endif /* USE_HAL_UART_REGISTER_CALLBACKS */
}
}
else
{
/* Call user error callback */
#if (USE_HAL_UART_REGISTER_CALLBACKS == 1)
/*Call registered error callback*/
huart->ErrorCallback(huart);
#else
/*Call legacy weak error callback*/
HAL_UART_ErrorCallback(huart);
#endif /* USE_HAL_UART_REGISTER_CALLBACKS */
}
}
else
{
/* Non Blocking error : transfer could go on.
Error is notified to user through user error callback */
#if (USE_HAL_UART_REGISTER_CALLBACKS == 1)
/*Call registered error callback*/
huart->ErrorCallback(huart);
#else
/*Call legacy weak error callback*/
HAL_UART_ErrorCallback(huart);
#endif /* USE_HAL_UART_REGISTER_CALLBACKS */
huart->ErrorCode = HAL_UART_ERROR_NONE;
}
}
return;
} /* End if some error occurs */
/* Check current reception Mode :
If Reception till IDLE event has been selected : */
if ( (huart->ReceptionType == HAL_UART_RECEPTION_TOIDLE)
&&((isrflags & USART_SR_IDLE) != 0U)
&&((cr1its & USART_SR_IDLE) != 0U))
{
__HAL_UART_CLEAR_IDLEFLAG(huart);
/* Check if DMA mode is enabled in UART */
if (HAL_IS_BIT_SET(huart->Instance->CR3, USART_CR3_DMAR))
{
/* DMA mode enabled */
/* Check received length : If all expected data are received, do nothing,
(DMA cplt callback will be called).
Otherwise, if at least one data has already been received, IDLE event is to be notified to user */
uint16_t nb_remaining_rx_data = (uint16_t) __HAL_DMA_GET_COUNTER(huart->hdmarx);
if ( (nb_remaining_rx_data > 0U)
&&(nb_remaining_rx_data < huart->RxXferSize))
{
/* Reception is not complete */
huart->RxXferCount = nb_remaining_rx_data;
/* In Normal mode, end DMA xfer and HAL UART Rx process*/
if (huart->hdmarx->Init.Mode != DMA_CIRCULAR)
{
/* Disable PE and ERR (Frame error, noise error, overrun error) interrupts */
CLEAR_BIT(huart->Instance->CR1, USART_CR1_PEIE);
CLEAR_BIT(huart->Instance->CR3, USART_CR3_EIE);
/* Disable the DMA transfer for the receiver request by resetting the DMAR bit
in the UART CR3 register */
CLEAR_BIT(huart->Instance->CR3, USART_CR3_DMAR);
/* At end of Rx process, restore huart->RxState to Ready */
huart->RxState = HAL_UART_STATE_READY;
huart->ReceptionType = HAL_UART_RECEPTION_STANDARD;
CLEAR_BIT(huart->Instance->CR1, USART_CR1_IDLEIE);
/* Last bytes received, so no need as the abort is immediate */
(void)HAL_DMA_Abort(huart->hdmarx);
}
#if (USE_HAL_UART_REGISTER_CALLBACKS == 1)
/*Call registered Rx Event callback*/
huart->RxEventCallback(huart, (huart->RxXferSize - huart->RxXferCount));
#else
/*Call legacy weak Rx Event callback*/
HAL_UARTEx_RxEventCallback(huart, (huart->RxXferSize - huart->RxXferCount));
#endif
}
return;
}
else
{
/* DMA mode not enabled */
/* Check received length : If all expected data are received, do nothing.
Otherwise, if at least one data has already been received, IDLE event is to be notified to user */
uint16_t nb_rx_data = huart->RxXferSize - huart->RxXferCount;
if ( (huart->RxXferCount > 0U)
&&(nb_rx_data > 0U) )
{
/* Disable the UART Parity Error Interrupt and RXNE interrupts */
CLEAR_BIT(huart->Instance->CR1, (USART_CR1_RXNEIE | USART_CR1_PEIE));
/* Disable the UART Error Interrupt: (Frame error, noise error, overrun error) */
CLEAR_BIT(huart->Instance->CR3, USART_CR3_EIE);
/* Rx process is completed, restore huart->RxState to Ready */
huart->RxState = HAL_UART_STATE_READY;
huart->ReceptionType = HAL_UART_RECEPTION_STANDARD;
CLEAR_BIT(huart->Instance->CR1, USART_CR1_IDLEIE);
#if (USE_HAL_UART_REGISTER_CALLBACKS == 1)
/*Call registered Rx complete callback*/
huart->RxEventCallback(huart, nb_rx_data);
#else
/*Call legacy weak Rx Event callback*/
HAL_UARTEx_RxEventCallback(huart, nb_rx_data);
#endif
}
return;
}
}
/* 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;
}
}
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