Stefan Reinauer wrote: > > The only USB option is a Debug Class device. > > Or the Artec LPC dongle -
Sorry, I meant for USB connection to system being debugged. :) > it can transport POST codes via usb-serial from the target... For > someone with VHDL knowledge it might be possible to add a "fake > serial port" to the dongle. The way to get data out that I like the best is to use reads-mean-write, where a sequence of reading from certain addresses sends the lowest byte of the last read address via USB to the host and the user. Unfortunately, the dongle is already a serial device so it is difficult to create another serial port. That would be done using a kernel line discipline. Ideally, the USB descriptors and USB firmware in the dongle could be changed instead, which would allow for more channels besides the current communication. But I don't think it's doable with the FTDI USB chips, they are much too simple. It would of course be possible to use the existing USB-serial channel, just that the dongle would need to be reset before the next reprogram, once it has entered the reads-mean-write mode. That might be OK. //Peter -- coreboot mailing list: [email protected] http://www.coreboot.org/mailman/listinfo/coreboot
