nRF Connect SDK Log output to CDC ACM reconfiguration

[Dmitry Kr]

Dear sirs, 

Here we've faced with the issue about logs output, could you please help?

We need to use two CDC_ACM devices on the board: one for shell and printk() output and another for log output. So, now we've configured shell to use CDC_ACM_1 and set CONFIG_LOG_BACKEND_UART=y macro. Still, log output works only for RTT channel (as selected too), but no output is provided on CDC_ACM_0.

So, how is it possible to output log data to CDC_ACM_0? 

Thanks in advance, 

Dmitry Kr.

[Dmitry Kr]

Should note that after few rebuildings / reconfiguration the CDC_ACM_0 starts to output console stream too (in addtion to RTT), and shell on CDC_ACM_1 works well. There were no changes in console settings on that. What's going wrong here? 

[Dmitry Kr]

Also, the another issue was found:

1. RTT and USB console outputs data within 2 sec interval. Why?

2. RTT will not output console stream until USB initialized using usb_enable(). Why can't we use these interfaces independently?