UART Logging on NRF52832

[wait-for-it]

Hi everyone,

I'm currently trying to the get UART logging running on the NRF52832, but fail to get the SDK working.

My settings are as follows:

#define NRFX_UARTE_ENABLED 1
#define NRFX_UARTE0_ENABLED 0
#define NRFX_UART_ENABLED 1
#define NRFX_UART0_ENABLED 0
#define UART_ENABLED 1
#define UART0_ENABLED 1
#define NRF_LOG_ENABLED 1
#define NRF_LOG_BACKEND_UART_ENABLED 1
#define NRF_LOG_BACKEND_UART_TX_PIN 32
#define NRF_LOG_BACKEND_UART_BAUDRATE 10289152
#define NRF_LOG_BACKEND_UART_TEMP_BUFFER_SIZE 512

My code looks as follows:

#include <stdio.h>
#include <stdint.h>
#include <stdbool.h>

#include "nordic_common.h"

#include "app_error.h"

#include "nrf_log.h"
#include "nrf_log_ctrl.h"
#include "nrf_log_default_backends.h"

int main() {
  ret_code_t err_code = NRF_LOG_INIT(NULL);
  APP_ERROR_CHECK(err_code);

  NRF_LOG_DEFAULT_BACKENDS_INIT();

  for (;;) {
    NRF_LOG_PROCESS();
  }

  return 0;
}

With this, I get the following error:

/opt/tools/gcc-arm-none-eabi/bin/../lib/gcc/arm-none-eabi/10.2.1/../../../../arm-none-eabi/bin/ld: CMakeFiles/nrf5_nrfx_uart.dir/opt/tools/nrf/sdks/16.0.0/modules/nrfx/drivers/src/nrfx_uart.c.obj: in function `UARTE0_UART0_IRQHandler':
nrfx_uart.c:(.text.UARTE0_UART0_IRQHandler+0x0): multiple definition of `UARTE0_UART0_IRQHandler'; CMakeFiles/nrf5_nrfx_uarte.dir/opt/tools/nrf/sdks/16.0.0/modules/nrfx/drivers/src/nrfx_uarte.c.obj:nrfx_uarte.c:(.text.UARTE0_UART0_IRQHandler+0x0): first defined here
collect2: error: ld returned 1 exit status

I've also tried multiple settings, but nothing works. Actually, I am not even sure what UART driver I'll need (UART, NRFX_UART or NRFX_UARTE).

Thanks in advance and best regards!

[Simonr]

Hi

A few things you can try that has fixed this "multiple definition error" of the "UARTE0_UART0_IRQHandler":

• Try disabling legacy UART peripheral support by setting #define UART_LEGACY_SUPPORT 0 in your sdk_config.h file.
• Enable peripheral resource sharing for UART/UARTE. This is done by setting #define NRFX_PRS_ENABLED 1 and #define NRFX_PRS_BOX_2_ENABLED 1 in sdk_config.h.

Best regards,

Simon

[wait-for-it]

Thanks, that fixed the problem!