Hi,
I need a DMA setup for 4 separate UARTs in an STM32G473 controller. The idea is to always be able to receive data through rxDMA, and only invoke txDMA when sending data. The data that I receive changes in size, is between 20 and 300 bytes, starts with a start character, and stops with 2 CRC bytes. Considering this, I think the best way to go is using `HAL_UARTEx_ReceiveToIdle_DMA` and `HAL_UARTEx_RxEventCallback` as IDLE callback. Correct me if I'm wrong.
I wonder if I always need to execute `HAL_UARTEx_ReceiveToIdle_DMA` after I process the data? Or do I use `HAL_UARTEx_ReceiveToIdle_IT`?
I also noticed that `HAL_UARTEx_RxEventCallback` stops working after I receive a `HAL_UART_TxCpltCallback`. Are these interrupts linked to each other?
Do I need to use `HAL_UARTEx_ReceiveToIdle_IT` or `HAL_UARTEx_ReceiveToIdle_DMA` at the end of HAL_UART_TxCpltCallback to enable reception again?
I think it's odd that receiver callback interrupts are disabled after Tx complete callbacks. I'm afraid I'm losing receiving data this way. How do I make sure I do not lose any data on the serial ports?
Thanks!
void HAL_UARTEx_RxEventCallback(UART_HandleTypeDef *huart, uint16_t Size){
uint32_t head;
uint8_t n;
// process data ....for(n=0;n<port_end_of_list;n++)
if(huart->Instance == uartbuffer[n].type)
{
HAL_UARTEx_ReceiveToIdle_DMA(....
}
}
void HAL_UART_TxCpltCallback(UART_HandleTypeDef *huart){
uint8_t n;
for(n=0;n<port_end_of_list;n++)
{
if(huart->Instance == uartbuffer[n].type)
{
HAL_UARTEx_ReceiveToIdle_DMA ....
}
}
}
