printf, uart0 and libuarte ?

RE: printf, uart0 and libuarte ?

Vidar Berg — Tue, 16 Feb 2021 10:40:10 GMT

Yes, but you would have to use libuarte with UARTE1 with a different pinout to avoid conflict with the UARTE0 instance used by the logger module. I think it would be easier if you selected the RTT backend for logging.

RE: printf, uart0 and libuarte ?

RixtronixLAB — Fri, 12 Feb 2021 23:30:58 GMT

no output from NRF_LOG_INFO() , which config do I miss here in libuarte example ? thanks

RE: printf, uart0 and libuarte ?

RixtronixLAB — Fri, 12 Feb 2021 22:12:52 GMT

so nrf_log_info() can work together with libuarte ?

RE: printf, uart0 and libuarte ?

Vidar Berg — Fri, 12 Feb 2021 15:26:57 GMT

The logger module works with the driver directly, so it's no using libuarte.

RE: printf, uart0 and libuarte ?

RixtronixLAB — Fri, 12 Feb 2021 15:24:07 GMT

How to use Logger module with libuarte ?

RE: printf, uart0 and libuarte ?

Vidar Berg — Fri, 12 Feb 2021 15:22:15 GMT

Maybe it's returning a busy error. Can you try to place the nrf_libuarte_async_tx() call inside a while loop that only exits when nrf_libuarte_async_tx() has returned NRF_SUCCESS?

while (err_code != NRF_SUCCESS) {

err_code = nrf_libuarte_async_tx(&libuarte, (uint8_t*)&ch,1);

}

Also, have you considered using our Logger module? It offers some good features that you don't get with printf's

RE: printf, uart0 and libuarte ?

RixtronixLAB — Fri, 12 Feb 2021 15:08:53 GMT

int fputc(int ch, FILE * p_file)
{
UNUSED_PARAMETER(p_file);

//UNUSED_VARIABLE(app_uart_put((uint8_t)ch));
nrf_libuarte_async_tx(&libuarte, (uint8_t*)&ch,1);
return ch;
}

it's only printing the first character ??

RE: printf, uart0 and libuarte ?

RixtronixLAB — Fri, 12 Feb 2021 05:20:53 GMT

How to use :

NRF_MODULE_ENABLED(RETARGET) in retarget.c ? thanks

RE: printf, uart0 and libuarte ?

RixtronixLAB — Thu, 11 Feb 2021 15:17:01 GMT

do you mean replacing :

#define PUTCHAR_PROTOTYPE int fputc(int ch, FILE *f)

with :

app_uart_put()

become :

#define PUTCHAR_PROTOTYPE int app_uart_put(ch) ?

RE: printf, uart0 and libuarte ?

RixtronixLAB — Thu, 11 Feb 2021 15:10:30 GMT

I got this error ?

.\_build\nrf52840_xxaa.axf: Error: L6200E: Symbol __asm___10_retarget_c____REV16 multiply defined (by retarget_1.o and retarget.o).
.\_build\nrf52840_xxaa.axf: Error: L6200E: Symbol __asm___10_retarget_c____REVSH multiply defined (by retarget_1.o and retarget.o).
.\_build\nrf52840_xxaa.axf: Error: L6200E: Symbol __asm___10_retarget_c____RRX multiply defined (by retarget_1.o and retarget.o).

and how can I use app_uart_put() ?

RE: printf, uart0 and libuarte ?

RixtronixLAB — Mon, 08 Feb 2021 22:32:05 GMT

Hi Vidar, thanks for the reply,

Then how can I relate with my printf(), is retarget.c activating printf() ?

I'll give a try and posted,

Cheers

RE: printf, uart0 and libuarte ?

Vidar Berg — Mon, 08 Feb 2021 13:07:30 GMT

Hello,

Could you please try to use the retarget.c implementation \components\libraries\uart and replace the call to app_uart_put() with nrf_libuarte_async_tx() to see if it gives the same result. The length argument should also be set to '1' byte as it is supposed to send one byte at a time.