STM32 Hal Uart RX randomly Freezes using DMA
Hey guys we are using the HAL Uart at 9600 Baud between our Bluetooth Board and Motion Sensor. We are using the DMA in non circular Buffer mode and then we have an actual Circular Buffer the Data goes into after the DMA. We are noticing randomly the Uart Rx freezes but everything else including Uart tx keeps working. We are re-initializing the DMA After call back.
This is the initialization.
HAL_UARTEx_ReceiveToIdle_DMA(&huart2, dmaModemRxBuf, DMA_RX_BUF_SIZE);
This is our Call Back.
void HAL_UARTEx_RxEventCallback(UART_HandleTypeDef *huart, uint16_t Size)
{
if(huart->Instance == USART2){
for(int i = 0; i < Size; i++){
modemCircBufPush(&modemRxBuffer,dmaModemRxBuf[i]);
}
//use circ push the data into ring buffer
HAL_UARTEx_ReceiveToIdle_DMA(&huart2, dmaModemRxBuf, DMA_RX_BUF_SIZE);
// __HAL_DMA_DISABLE_IT(&hdma_usart2_rx,DMA_IT_HT);
}else if(huart->Instance == USART1){
//SendMessageToDevice(0x07, 0x07);
for(int i = 0; i < Size; i++){
circBufPush(&deviceRxBuffer,dmaDeviceRxBuf[i]);
}
HAL_UARTEx_ReceiveToIdle_DMA(&huart1, dmaDeviceRxBuf, DMA_RX_BUF_SIZE);
//__HAL_DMA_DISABLE_IT(&hdma_usart1_rx,DMA_IT_HT);
}
}
We commented out the Half Transfer Interrupt Disable thinking that might be the issue but it did not help. The Data coming in is of varying length and the RX buffer is 120 bytes. Doing Live Expression we can see the buffer is not filling up but the DMA stops responding.
Was curious if there were any known issues with this method.
Our MCU is the STM32G030F6Px