一、Firmware

1. sdk_config.h

#define NRF_LOG_BACKEND_RTT_ENABLED 1
#define NRF_LOG_ENABLED 1

2. header files

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

3. initialization function

void log_init(void)
{ret_code_t err_code = NRF_LOG_INIT(NULL);APP_ERROR_CHECK(err_code);NRF_LOG_DEFAULT_BACKENDS_INIT();
}

4. flush log buffer function

NRF_LOG_PROCESS();

5. main function

int main(void)
{log_init();NRF_LOG_INFO("RTT_LOG");for(;;){if (NRF_LOG_PROCESS() == false){nrf_pwr_mgmt_run();}
}

二、Software

1. JLink.exe

2. JLink RTT Viewer