P33M

Please open a new issue in this repo.

I seem to remember vague rumblings in the past about lack of support for ZLP transmission in tinyUSB and/or its rp2040 port. Possibly related.

Please upload a complete project (with CMakeLists.txt and sample code) implementing a minimal testcase that shows the issue.

Works on my machine(s)? CM4+CM4IO plugged into a dumb switch with a Pi 5. CM4 assumes master role, Pi 5 syncs to master. ``` pi@raspberrypi:~$ sudo ptp4l -i eth0 -l...

The MAC driver registers the ptp device in this case, not the PHY driver. What is your server configuration? I see you have ``` ptp4l[1220.606]: selected best master clock f8e43b.fffe.a6665f...

Pi 5: ``` pi@raspberrypi:~$ uname -a Linux raspberrypi 6.6.13-v8-16k+ #14 SMP PREEMPT Wed Jan 24 16:31:17 GMT 2024 aarch64 GNU/Linux pi@raspberrypi:~$ ptp4l -v 3.1.1 ``` Local kernel build, but reflects...

Do you have an example of a serial terminal program that does not customarily set DTR by default, and does not expose this option to the user?

All of the screenshots there offer the user a DTR toggle. The International Telecommunications Union document ITU-T Rec V.24 has this to say about DTE behaviour in section 3.11: >3.11...

DTR is/should be orthogonal to flow control. It controls the state of the overall communication channel, not the temporary line conditions requiring pauses (FIFO fill levels) for which RTS/CTS are...

The picoprobe uart doesn't expose flow-control pins at all. Even if it did, you won't get a DTR pin as it's not a hardware mux option. The proposal above is...