Know I'm a bit late, but for me it was much easier to use FT232H-based USB board as a debug dongle. Initially I also wanted to build that FX2LP sandwich, but some confusion regarding the revisions (it's a bit tiresome to ask many sellers for a board revision in advance) and the need for revision-dependent soldering have scared me off. With a couple of FT232H from china/aliexpress and two USB extension cables for them, I didn't need to solder anything except their pin headers, so it was quite easy for me to get it working with coreboot - just by enabling CONFIG_USBDEBUG_DONGLE_FTDI_FT232H at its' config. But I haven't compared what is easier to use from a software side, for coreboot : FX2LP (which seems to have its' own firmware) or FT232H. It seems that you don't have a coreboot-supporting board, but maybe you could still use the sources from /coreboot/src/drivers/usb/gadget.c for your OS.
On Sun, Oct 13, 2019 at 1:28 AM <[email protected]> wrote: > > Hi > I’ve seen an EHCI debug dongle in the old wiki. I’m trying to build one for 2 > purposes: debug a homebrew os/Shell and make it a new UEFI bootloader. > However I don’t know where to find further documentation or comments about > this. I also dont’ know what is the current or most up to date schematic to > build the “sandwich” and what tracks cut and what not. I have bought those > blue cypress FX2LP boards and I don’t know how to check revisions. Also, > I’dont know exactly what software can be used to control it. It would be > desirable if one can send stop or install some breakpoints with Visual > studio’s debugger or WinDBG or GDB or something like that. > thanks in advance for your advice. > > _______________________________________________ > coreboot mailing list -- [email protected] > To unsubscribe send an email to [email protected] _______________________________________________ coreboot mailing list -- [email protected] To unsubscribe send an email to [email protected]
