Logging over UART

[[email protected]]

Hi

I am working with the twi_scanner_pca10056 example found in the SDK. Using a oscilloscope I can detect the logging messages on pin P0.01, even though sdt_config.h defines

#ifndef UART_CONFIG_LOG_ENABLED
#define UART_CONFIG_LOG_ENABLED 0
#endif

However if I change the setting to (which I thought is necessary in order to direct debug messages to the UART)

#ifndef UART_CONFIG_LOG_ENABLED
#define UART_CONFIG_LOG_ENABLED 1
#endif

the application hangs when the first logging message is generated. Why?

[Martin Lesund]

Hello Felix,

It is not strange that you can see activity on pin P0.01 since that pin is for the 32.768kHz crystal.

• Connector interface

Please take a look in the Logger module documentation on how to correctly initialize logging.

Similar thread.

[[email protected]]

Sorry, the P0.01 was I typing error. I meant pin P0.06, where I could correctly decode the logging messages with an oscilloscope. As I have written in my initial post, I expected logging messages to only appear on the above mentioned pin if UART_CONFIG_LOG_ENABLED is set to 1. 

[Martin Lesund]

Check out this.

Also could you try to debug and also check that the signals are correct according to what you have programmed.

[Sigurd]

Try to set NRF_LOG_BACKEND_UART_ENABLED to 0, in order to turn off logging over UART.