raiden00pl commented on PR #8906: URL: https://github.com/apache/nuttx/pull/8906#issuecomment-1494350468
> F411 has dwc2, and you were working with systemwide NuttX USB stack (and maybe NENDPOINTS). Could you suggest how to debug/trace this, apart from USBTRACE and logic analyzers (sigrok-pico) on D+/D-? USBTRACE is troublesome, it can add delays to USB controller that completely breaks communication with the host. It is useful to track the order of calls in the system (USB stack + USB controller) but you have to be aware that communication may not work. Wireshark with usbmon can be useful, at least to verify the errors on the host side. It is the best to compare how the communication looks for a non-working and working device. But serious USB debugging without a dedicated USB protocol analyzer is terribly difficult. Unfortunately, these devices are not cheap. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: commits-unsubscr...@nuttx.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org
