error codes for APP_UART_COMMUNICATION_ERROR

[ms360]

I'm seeing a few of these errors in my uart evt handler

I cannot seem to find where these are enumerated in app_uart_fifo.c or nnrf_drv_uart.h or nrfx_uarte.h.

Question 1 - Where can I find these?  

<error> app: APP_UART_COMMUNICATION_ERROR : 1 00
<error> app: APP_UART_COMMUNICATION_ERROR : 5 00
<error> app: APP_UART_COMMUNICATION_ERROR : 4 00

Here is the code generating that log - 

NRF_LOG_ERROR("APP_UART_COMMUNICATION_ERROR : %d %02x", p_event->data.error_code, NRF_UARTE0->ERRORSRC);

When this happens, I try to run

app_uart_flush();

app_uart_close();

APP_UART_FIFO_INIT();

Question 2 - Is there a better way to recover? 

Thanks!

[Vidar Berg]

ms360 said:

Each response has a fixed number of bytes, which is known ahead of time when I make the request.

As long as you know the number of bytes ahead of time it should be easy to use the UART driver directly. This require fewer resources and has lower complexity compared to the UARTE driver.

ms360 said:

I got libuarte kind of working. I was getting intermittent responses depending on the timeout counter. Is that a receiver to idle timeout? I couldn't find many details. 

Yes, the timeout is to detect when the receiver has stopped receiving new data, but I'm not sure how this could lead to intermittent responses.