UART error are not cleared

[Rantanplan]

Hello,

I'm trying to detect a UART_ERROR_BREAK on an USB ACM CDC interface of the nRF5340 using NCS2.7.

static void interrupt_handler(const struct device *dev, void *user_data)
{

	uint32_t err = uart_err_check(dev); 
	LOG_DBG("Error: %x", err);

The returned error code is always 0xffffffa8. How do I clear the error?

Furthermore, is there a way to generate a BREAK-Error? Unfortunately, some of our old devices used this approach to signalize the PC a specific condition. Now we have to emulate this behaviour with the nRF5340.

Many thanks for your answers in advance.

Kind regards,

Christian

[Kazi Afroza Sultana]

Hello Christian,

The application is based on USB CDC ACM?

''The returned error code is always 0xffffffa8.''

USB errors are typically defined as flag in uart_rx_stop_reason.

Could you please show me the error log? 

Thanks.

BR

Kazi