USB cdc_acm questions

RE: USB cdc_acm questions

AndyM — Wed, 12 Jul 2023 13:23:32 GMT

That did it ! No more log messages in the shell console. Thank you for help!

Andy

RE: USB cdc_acm questions

Kenneth — Wed, 12 Jul 2023 10:19:10 GMT

Try to add CONFIG_SHELL_LOG_BACKEND=n

Kenneth

RE: USB cdc_acm questions

Kenneth — Wed, 12 Jul 2023 09:53:44 GMT

It's not that much to say really, if I open the cdc acm composite example unmodifed and use:

CONFIG_LOG_BACKEND_UART=n
CONFIG_LOG_BACKEND_RTT=y

Then it prints to RTT, and similiar the following to UART:

CONFIG_LOG_BACKEND_UART=y
CONFIG_LOG_BACKEND_RTT=n

Edit: But when I enable Shell then I can see the log pops up. Let me look into it.

Kenneth

RE: USB cdc_acm questions

AndyM — Tue, 11 Jul 2023 20:56:16 GMT

Any updates? Thank you

RE: USB cdc_acm questions

AndyM — Wed, 05 Jul 2023 15:34:36 GMT

Update

No luck with config settings. The log output still appears in the shell console

RE: USB cdc_acm questions

AndyM — Wed, 05 Jul 2023 13:52:08 GMT

I will test the config settings and let you know.

What about that comment in the uart_fifo_fill() function description?

It says that the function should only be used from an ISR. I'm using it from the main application thread on an nRF52840 DK and don't see any ill effects. Simulated sending large data chunks and it seems to be working normally. Anything I'm overlooking here?

RE: USB cdc_acm questions

Kenneth — Tue, 04 Jul 2023 14:23:36 GMT

[quote user="AndyM"]That did not help. I still see RTT log messages in the shell console[/quote]

I guess I should try this myself, but maybe you can try something like:

CONFIG_LOG=y
CONFIG_LOG_BACKEND_UART=n
CONFIG_LOG_BACKEND_RTT=y
CONFIG_USE_SEGGER_RTT=y
CONFIG_UART_CONSOLE=n
CONFIG_RTT_CONSOLE=y

[quote user="AndyM"]

text
text

text

[/quote]

Typicallly this is controlled by the terminal window, see New-line:

Kenneth

RE: USB cdc_acm questions

AndyM — Tue, 04 Jul 2023 13:26:35 GMT

That did not help. I still see RTT log messages in the shell console

Could you please provide answers to the other questions - about using uart_fifo_fill() and each new line printed at an offset like so

text
text

text

Update

Did more testing

Apparently "\n" character at the end of the string causes the above behavior

"\r" character causes the current line to be overwritten so only the last line is printed. The cursor stays in the leftmost position

"\r\n" prints the lines correctly.

I'm on Windows using putty

Thank you

RE: USB cdc_acm questions

Kenneth — Tue, 04 Jul 2023 08:34:01 GMT

Try:

CONFIG_LOG_BACKEND_UART=n
CONFIG_LOG_BACKEND_RTT=y

Kenneth