HAL_Delay in uart receive interrupt

[giwonKIM]

Hi

 

When HAL_Delay goes into uart interrupt, the program stops.

Is there a way to work it out?

 

I tried to use NVIC, but I don't know how to set it up.

 

Please advise. Thank you.

 

Here is my uart interrupt service routine.

 

void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart)

{

if(huart == &huart1)

{

uart_receivebuffer[uartidx++] = rx_buf;

 

if(rx_buf == 0x03)

{

 

HAL_Delay(100);

 

UartReceive();

}

 

HAL_UART_Receive_IT(&huart1, &rx_buf, 1);

 

 

}

}

[TDK]

HAL_Delay needs SysTicks to keep firing to work.

Make your SysTick interrupt higher priority (numerically lower) than your UART interrupt priority. Like this:

 

It's generally frowned upon to have blocking code, or code that takes a long time to complete, within an interrupt handler, but that is a separate issue.

[giwonKIM]

Now it works!!

 

Really really thank you.

[gbm]

Nope, it doesn't. It's impossible to do anything practical (like implement any comm protocol) with any Delay() called from a UART ISR.