usb_cdc_acm: cdc_acm_poll_out: Ring buffer full, drain buffer

RE: usb_cdc_acm: cdc_acm_poll_out: Ring buffer full, drain buffer

Kenneth — Mon, 24 Apr 2023 12:53:48 GMT

In the other case I suggested to observe the USB events relative to the issue you are experiencing, this might give us some clue as to what is failing.

Kenneth

RE: usb_cdc_acm: cdc_acm_poll_out: Ring buffer full, drain buffer

douglas.malnati — Mon, 24 Apr 2023 12:42:48 GMT

Thanks Kenneth. The other case does not explain this case, though. Do you agree?

The reason why is in this case I always had an open connection via USB (so not queuing into any ring buffer of an empty connection) and also I'm sending at such a slow pace it's hard to believe any outbound buffer could fill anyway.

I need an answer about how to detect it from happening and to correct it in code. I cannot have the logging system destroy my application.

RE: usb_cdc_acm: cdc_acm_poll_out: Ring buffer full, drain buffer

Kenneth — Mon, 24 Apr 2023 11:41:58 GMT

Hello,

I updated the other case you linked.

Kenneth