TCP over USB connection between piggui to porky

[andrewdavidmackenzie]

So far, I've been using a Raspberry Pi, or Pi Pico W for the GPIO control - and assuming Wifi access from the device for "remote control" from the GUI.

As the need for ocnfiguring the wifi of Pi Pico W came up, one idea was via USB from Piggui.

That made me think of this idea: to add USB between host (piggui) and Pico (porky) as an option in addition to network (tcp, iroh).

The advantages of this:

• extends devices supported to those without Wifi (Pi Pico and others)
• makes it easy to use (just plug in the device with USB) and need less or no config of the device
• would enable us to config the wifi of the device if it has it, for later disconnected (via USB) use

[andrewdavidmackenzie]

Implemented, but stuggling to get working with correct host config to DHCP it...

[andrewdavidmackenzie]

Now going to try usb_raw sending commands back and fore....

[andrewdavidmackenzie]

Might need to document (per host platform) how to setup and use the DHCP server to ip on usb

http://www.jacquesf.com/2011/04/mac-os-x-dhcp-server/
https://superuser.com/questions/633017/using-macbook-pro-ethernet-as-a-dhcp-server
https://web.archive.org/web/20221014133604/https://aleph0.com/computing/macosx/dhcp-setup/
http://www.jacquesf.com/2011/04/mac-os-x-dhcp-server/

[andrewdavidmackenzie]

This PR implements detection of a proky connected to a piggui by USB using usb-raw: #597

[andrewdavidmackenzie]

If we get usb raw working for all functionality then bail on this and remove the usb-tcp code from porky