Good day! I am looking for the dirt cheap EHCI debug dongle. Initially I found these instructions for FX2LP - https://www.coreboot.org/DIY_EHCI_debug_dongle - but they require a lot of manual soldering/mods which depend on your boards revision and I am not sure if the currently produced boards are 100% compatible with the wiki instructions
But then I noticed a coreboot has USBDEBUG_DONGLE_FTDI_FT232H option: " Use this with FT232H usb-to-uart. Configuration is hard-coded to use 8n1, no flow control "
Kyösti Mälkki tested it " with gizmosphere/gizmo1 Explorer add-on board, which exposes the following device: 0x0403 Future Technology Devices International, Ltd 0x6014 FT232H Single HS USB-UART/FIFO IC " but gizmo1 is expensive and I am not a fan of the single board computers (SBCs) : they all require the binary blobs which could contain the scary backdoors
However, there are $7 cheap FT232H boards with USB available at AliExpress:
https://www.aliexpress.com/item/NEW-CJMCU-FT232H-Multifunction-High-Speed-US...
I plan to get a couple of these boards, connect them to each other with 1P 2.54mm wires, plug the 1st board into master PC (coreboot-PC-under-debug) USB 2.0 port and the 2nd board into slave PC (another coreboot PC which will be logging the debug info)
Please tell me: could this setup work in theory, or there are obvious shortcomings that could prevent it from working?
Best regards, Mike Banon