RE: override SHELL control over UART backend

Ahmed Samir — Fri, 05 Apr 2024 16:42:10 GMT

Thanks for checking, and please check with them also if logger needs to be disabled during accessing the UART.

Vidar Berg — Fri, 05 Apr 2024 13:19:58 GMT

Hi,

I believe it should be possible to use the UART directly to transmit data while the logger and shell is enabled.

Please try the following:

Get the UART instance used by shell

#include <zephyr/drivers/uart.h>

const struct device *uart = DEVICE_DT_GET(DT_CHOSEN(zephyr_shell_uart));

Send data 1 byte at a time using uart_poll_out()

void print_uart(char *buf)
{
	int msg_len = strlen(buf);

	for (int i = 0; i < msg_len; i++) {
		uart_poll_out(uart, buf[i]);
	}
}

I can ask the developers on Monday if they foresee any potential conflicts with this approach.

Best regards,

Vidar