Support USB External PHY and USB-SERIAL-JTAG coexistence

esp-rs / esp-hal

no_std Hardware Abstraction Layers for ESP32 microcontrollers

https://docs.esp-rs.org/esp-hal/

Apache License 2.0

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Support USB External PHY and USB-SERIAL-JTAG coexistence #1991

Open ProfFan opened 3 weeks ago

ProfFan commented 3 weeks ago

This can be achieved per the TRM (page 942).

The first part would eliminate the need to enable the internal PHY alongside with Wi-Fi which apparently is not recommended per the manual.

The second part would allow the USB and USB-JTAG to be used concurrently, which allows easy, debuggable development of USB peripherals.

MabezDev commented 3 weeks ago

This would be nice, something I wish I did for my keyboard. I don't think it should be that hard, but I don't know how to test it. Do you know of any devkits that use an external USB phy?

ProfFan commented 3 weeks ago

@MabezDev I don't know, but this seems to indicate a viable solution. I'll see if I can make something that has it and potentially ship to you guys?