C/C++ • Re: UART / USB through the USB-C power port

Oh, that's fine. I have a uart to usb bridge on the other side. Would I be able to access the usb2.0 port? If so, how would I enable it and what is the path?

Depends. Which side (UART or USB) will be connected to the Pi?

The very short guide to USB on the USB C port:

• Add the following to the end of /boot/firmware/config.txt

  Code:

  [all]dtoverlay=dwc2

  for peripheral (gadget/device) only mode or

  Code:

  [all]dtoverlay=dwc2,dr_mode=host

  for host only mode. OTG mode is not possible as the USB C connector lacks the required hardware.
• Reboot
• For host mode treat as any other USB controller
• For device mode load the chosen module (e.g. g_serial) and use the provided devices as you would any other of that class.

[shameless self promotion]
A couple of non-UART examples. May not mention the Pi5 but configuration and behaviour is the same as on the 4B.
USB Ethernet Gadget A Beginner's Guide
USB Mass Storage Gadget - A Beginner's Guide
[/shameless self promotion]

Expect power problems unless the device on the other end is a PD source with a 5A@5V mode.

Statistics: Posted by thagrol — Fri Feb 14, 2025 1:05 am

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