nrf5340 logging issue

[freelon]

I want to add some logging to my nrf5340 net application and I'm having some troubles.

I have the following in my main.c:



#include <logging/log.h>

LOG_MODULE_REGISTER(foo, LOG_LEVEL_DBG);

int main() {

  LOG_INF("hello world");

} 



and the following in my prj.conf file:


CONFIG_GPIO=y
CONFIG_NRFX_DPPI=y
CONFIG_NRFX_NVMC=y

CONFIG_LOG=y
CONFIG_NET_LOG=y
CONFIG_LOG_DEFAULT_LEVEL=3
CONFIG_STACK_SENTINEL=y
CONFIG_NEWLIB_LIBC=y
CONFIG_NEWLIB_LIBC_FLOAT_PRINTF=y
CONFIG_RING_BUFFER=y

# Segger RTT
CONFIG_USE_SEGGER_RTT=n
CONFIG_RTT_CONSOLE=n
CONFIG_UART_CONSOLE=y
CONFIG_LOG_BACKEND_RTT=n
CONFIG_LOG_BACKEND_UART=y

[Amanda Hsieh]

Hi, 

You should develop an application in the application core. Please see this tutorial to develop hello_world on nRF5340 app core. 

See how-to-use-rtt. documentation to get the logging output using Real Time Transfer (RTT), modify the configuration settings of the sample to override the default UART console:

CONFIG_USE_SEGGER_RTT=y
CONFIG_RTT_CONSOLE=y
CONFIG_UART_CONSOLE=n

If you want to develop an application in the network core, you can refer to network-samples. 

-Amanda H.

[freelon]

is logging not possible in the net core? I need to develop this application for the net core so I figured I would start there

[Amanda Hsieh]

Hi, 

It is possible. Please see this case. For nrf5340pdk_nrf5340_cpuapp, you should run the empty_app_core sample. On nrf5340pdk_nrf5340_cpunet, you run your hello_world.  

-Amanda H.