michallenc commented on issue #16004: URL: https://github.com/apache/nuttx/issues/16004#issuecomment-2732004468
Hi, I also had some issues with CDC ACM after the patch, but only for our custom [Silicon Heaven protocol](https://silicon-heaven.github.io/shv-doc/), wasn't able to reproduce it with a simple application I could share to reproduce. To be short, we use a lot of request-response communication and sometimes the response is not sent from the board to the computer. This happens only after the patch and I don't think it is caused by the protocol as it only uses calls like `fwrite`/`fread`/etc. It seems more like some timing issue with endpoints or requests. The configuration change of `CONFIG_CDCACM_NWRREQS` and `CONFIG_CDCACM_NRDREQS` from 4 to 8 helped, but this seems more like a hot workaround than a proper solution. I have tested it only on SAMv7 MCU, so it may be related to that MCU as well (the USB there is a mess, it is slow as hell, I am getting 10 times slower communication than I should have, but haven't had time to look at that properly yet). This is just for info, maybe it is related to this issue, but I don't expect you to invest a time into this as this can't be easily reproduced and might be only SAMv7 related. I plan to look in to it in some days, hopefully. -- 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
