DTM observe on monitor

[william_wu_A]

Hi there

I tried to observe the message when DTM are working.

So I modify the example direct_test_mode to display on monitor.

But after modified , it comes out the error.

.\_build\nrf52832_xxaa.axf: Error: L6218E: Undefined symbol m_nrf_log_app_logs_data_dynamic (referred from app_error_weak.o).
.\_build\nrf52832_xxaa.axf: Error: L6218E: Undefined symbol nrf_log_frontend_dequeue (referred from app_error_weak.o).
.\_build\nrf52832_xxaa.axf: Error: L6218E: Undefined symbol nrf_log_frontend_std_0 (referred from app_error_weak.o).
.\_build\nrf52832_xxaa.axf: Error: L6218E: Undefined symbol nrf_log_panic (referred from app_error_weak.o).
Not enough information to list image symbols.
Not enough information to list load addresses in the image map.

What I missing?

[william_wu_A]

Hi

Update the discovery

What is the relationship between below code?

#ifndef NRF_LOG_ENABLED
#define NRF_LOG_ENABLED 1
#endif

After I turned 1 to 0, the error is solve.

Why?

[Håkon Alseth]

Hi,

 

It looks like your project does not have the nrf_log libraries added. When the NRF_LOG module is disabled in sdk_config.h, all NRF_LOG_*("message") calls are omitted, which is why it compiles when you set NRF_LOG_ENABLED 0.

 

Best regards,

Håkon

[william_wu_A]

Hi sir 

You means these??

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

[Håkon Alseth]

Yes, and the corresponding .c files for the NRF_LOG interface: