Logging in secure_bootloader example

Question

Hi, 
 I'm using Secure_Bootloader example of SDK 15.0.0 and I can't get the Logger module to work. I set NRF_LOG_ENABLED to 1, increased memory regions in make file, so the bootloader fits to that. 
 But I'm getting errors from the linker: 
 undefined refernce to nrf_log_frontend_std_0 
 and other functions 
 Compiler: GCC 7.2.1 
 Someone has a glue, what's wrong? 
 Kind regards 
 Sascha Schmidt

Einar Thorsrud · Accepted Answer

Hi,

You need a few additional files in the Makefile as well as adjusting the memory regions in the linker settings. We already provide this in the pca10040_ble_debug project which you can find next to the "normal" pca10040_ble project in the SDK. For the nRF52 DK GCC project the differences are the following:

Fullscreen Makefile.diff Download

1c1
< PROJECT_NAME     := secure_bootloader_ble_s132_pca10040
---
> PROJECT_NAME     := secure_bootloader_ble_s132_pca10040_debug
14a15,19
>   $(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 \
25a31,32
>   $(SDK_ROOT)/external/fprintf/nrf_fprintf.c \
>   $(SDK_ROOT)/external/fprintf/nrf_fprintf_format.c \
28a36
>   $(SDK_ROOT)/components/libraries/experimental_memobj/nrf_memobj.c \
46c54,56
<   $(SDK_ROOT)/components/ble/common/ble_srv_common.c \
---
>   $(SDK_ROOT)/external/segger_rtt/SEGGER_RTT.c \
>   $(SDK_ROOT)/external/segger_rtt/SEGGER_RTT_Syscalls_GCC.c \
>   $(SDK_ROOT)/external/segger_rtt/SEGGER_RTT_printf.c \
49a60
>   $(SDK_ROOT)/components/ble/common/ble_srv_common.c \
107a119
>   $(SDK_ROOT)/external/fprintf \
110a123
>   $(SDK_ROOT)/external/segger_rtt \
142a156
> CFLAGS += -DDEBUG_NRF
146a161
> CFLAGS += -DNRF_DFU_DEBUG_VERSION
178a194
> ASMFLAGS += -DDEBUG_NRF
182a199
> ASMFLAGS += -DNRF_DFU_DEBUG_VERSION

Fullscreen secure_bootloader_gcc_nrf52.ld.diff Download

8c8
<   FLASH (rx) : ORIGIN = 0x78000, LENGTH = 0x6000
---
>   FLASH (rx) : ORIGIN = 0x72000, LENGTH = 0xc000
76,81d75
<   .log_const_data :
<   {
<     PROVIDE(__start_log_const_data = .);
<     KEEP(*(SORT(.log_const_data*)))
<     PROVIDE(__stop_log_const_data = .);
<   } > FLASH
93a88,93
>   .log_const_data :
>   {
>     PROVIDE(__start_log_const_data = .);
>     KEEP(*(SORT(.log_const_data*)))
>     PROVIDE(__stop_log_const_data = .);
>   } > FLASH

Logging in secure_bootloader example

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