Posted on March 02, 2015 at 13:00I am trying to receive GPS data over USART. I previously attempted ''polling mode'' which produced garbled/corrupted output. Now trying interrupt mode without success. I am also using FreeRTOS.
```
#define RXBUFFERSIZE 1
uint8_t aRxBuffer[RXBUFFERSIZE];
int task() {
status = HAL_UART_Receive_IT(&huart1, (uint8_t *) aRxBuffer, RXBUFFERSIZE);
if (status != 0) __BKPT(0);
}
extern ''C'' {
void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart) {
HAL_StatusTypeDef status;
uint8_t data;
osMessagePut(usartQueue, aRxBuffer[0], 0);
status = HAL_UART_Receive_IT(&huart1, (uint8_t *) aRxBuffer, RXBUFFERSIZE);
if (status != 0) __BKPT(0);
}
}
```
When `HAL_UART_IRQHandler(UART_HandleTypeDef *huart)` is called from the interrupt callback, the the over run error occurs which is the result of this code:
```
tmp1 = __HAL_UART_GET_FLAG(huart, UART_FLAG_ORE);
tmp2 = __HAL_UART_GET_IT_SOURCE(huart, UART_IT_ERR);
/* UART Over-Run interrupt occurred ----------------------------------------*/
if((tmp1 != RESET) && (tmp2 != RESET))
{
__HAL_UART_CLEAR_OREFLAG(huart);
huart->ErrorCode |= HAL_UART_ERROR_ORE;
}
```
What could be the cause?
Thank you
🙂
