Easy redirect RTT output to UART(E) ?

[Jesper W.]

Platform info: SDK153, MESH 3.2 and using SEGGER RTT for debug logging output with __LOG(...)  

I have a strange behaviour in one of my application, where it work very fine as long as my target is attached to J-LINK adapter (using RTT log-output), but as soon as I run it unattached Jlink,it behaves strange.   

In this situation I would like to have the log-out redirected to UART(E) :-) 

Is there an easy way of redirecting RTT output to UART(E) ( Eg using ringbuffer and none blocking) ?

[Vidar Berg]

Hi,

Have you tried connect the RTT viewer, etc after the device is started to behave strangely? The RTT buffer in RAM might contain a crash log if we are lucky. I think it would require some effort to add UART logging, but it's certainly possible. 

[Jesper W.]

Hi Vidar, 

The RTT viewer did not help me, so I found it easier to do a quick and dirty hardcoding directly to NRF_UART0/EasyDMA and  replaced the log_callback_rtt with my log_callback_uarte(...).

#undef LOG_CALLBACK_DEFAULT
#define LOG_CALLBACK_DEFAULT log_callback_uarte

Thanks :-)