BLE DFU: printing logging messages over UART

[Youssif]

Hi

I am trying to add the secure DFU bootloader (BLE) code to an existing application for the nRF52840. I'd like to send the logging information over UART. What are the steps to do this? I have tried the following:-

In sdk_config.h:-

#ifndef NRF_LOG_ENABLED
#define NRF_LOG_ENABLED 0
#endif

#ifndef UART_ENABLED
#define UART_ENABLED 0
#endif

In the Makefile, added the following source files:-

$(SDK_ROOT)/components/libraries/experimental_log/src/nrf_log_backend_rtt.c \
$(SDK_ROOT)/components/libraries/experimental_log/src/nrf_log_backend_serial.c \
$(SDK_ROOT)/components/libraries/experimental_log/src/nrf_log_default_backends.c \
$(SDK_ROOT)/components/libraries/experimental_log/src/nrf_log_frontend.c \
$(SDK_ROOT)/components/libraries/experimental_log/src/nrf_log_str_formatter.c \
$(SDK_ROOT)/components/libraries/experimental_memobj/nrf_memobj.c \
$(SDK_ROOT)/external/fprintf/nrf_fprintf.c \
$(SDK_ROOT)/external/fprintf/nrf_fprintf_format.c \
$(SDK_ROOT)/components/libraries/experimental_log/src/nrf_log_backend_uart.c

However, I still cannot see any debugging messages over UART. Is there something else that I'm missing?

I am using SDK v15.0.0 and softdevice v6.0.0 and I am building my project using arm-none-eabi-gcc v4.9.3 on a Windows 7 OS.

Thanks

Youssif

[Einar Thorsrud]

Hi,

You need to set NRF_LOG_ENABLED to 1 in sdk_config.h in order to enable logging. There are quite a few sdk_config.h parameters that need to be in place, so I recommend you to compare with a SDK example that has UART logging enabled (most example do).