[Feature Request]: Support for USB<->SPI Interfaces (FTDI, WCH) to connect LoRa chips

[dm5tt]

Platform

Linux Native

Description

As the project now has Linux support the easiest way to attach a LoRa module to a standard x64 system would be to use one of these FTDI or WCH USB<->SPI adapter PCBs. These can be bought for cheap from Aliexpress (FT2232HL, CH347 etc.) for a few $ or €.

So the idea:

• Add support for the most popular FTDI chips like the FT2232HL or FT232H or WCH stuff like CH347.
• WCH chips are great and super cheap too. But they have closed source creep. Some stuff got reverse engineered.

This also maybe will make automatic testing way more easy as the entire platform can be executed and debugged on a native system.

[jp-bennett]

There is a user-space driver for the CH341a in development. See the commits in https://github.com/meshtastic/firmware/tree/ch341

Developers have hardware getting assembled right now to finish this support.

Once that support is finished, we'll have a decent platform if anybody else wants to write a userspace driver for one of the other USB chips.