On Fri, Jun 27, 2008 at 03:34:20PM -0400, Joseph Smith wrote: > >> > I'll open my device up if I can find it to check if I remember > >> > correctly about the Ubicom. > >> > >> Thanks that would help a lot. > > > > To be honest, I don't think it would help at all, but I appreciate > > the curiosity and will be glad to provide photos when I find my > > device! :) > > Photos, will help it will show me if there are little caps, > resisters, diodes, etc between chips.
Sure, there will be some passives to glue the three major blocks together. > >> > USB serial port. CONFIG_USB_SERIAL_DEBUG enables the driver. > >> > >> So if this is enabled in in the kernel, what kind of device does > >> it show up as in the serial terminal emulator? > > > > I don't understand. A serial terminal emulator doesn't really > > know about devices. > > Yes it does, the emulator needs to know what port/device to connect > to (ex. /dev/ttyS0, /dev/ttyS1, /dev/ttyUSB0, etc) Oh that kind of device! :) > > You get one /dev/ttyUSBx serial port. Bytes sent out on the EHCI > > Debug Port on the system being debugged will be coming in on that > > serial port on the debugger host, and vice versa. > > Ok, that makes sense, I have a USB-> Serial adapter for my laptop > that comes up as /dev/ttyUSB0. So Linux signifys the USB debugger > as a USB serial device(/dev/ttyUSBx). If so that answers that > question. Right! Note that the NET20DC isn't any kind of debugger, it can be thought of as a special type of proxy for USB transfers. On Fri, Jun 27, 2008 at 09:43:50PM +0200, Carl-Daniel Hailfinger wrote: > I think the design might become easier if you just create the debug > part of the device and use the serial side of a plain usbserial > device as direct interface. Actually I suggested something along those lines already in the wiki page. :) But if someone is learning enough to make their own debug class device, it will be mostly a copypaste exercise to include a USB interface also for the other end. > And Peter will hate the statement above. :) Mh, not so bad. Looking at the economics of this project again, it requires the price to go down another $20, to make room for a USB-serial converter. (Though that has more uses, so maybe one could reduce that figure.) //Peter -- coreboot mailing list [email protected] http://www.coreboot.org/mailman/listinfo/coreboot
