hi, i began to use the usb serial console for debugging purposes recenty, and ran into the same problems as Guennadi. I followed the thread on this list, and applied/tested the patches. Most things work fine now (thanks to you), but i still have a few questions. Until now we used the first serial port (ttyS0) for debugging. Unfortunatelly there's no free serial port in the final product, so we decided to give the usb-serial system a try. The devel board had the system console (printk's) and a shell on the same serial port (both on ttyS0), we'd like to replicate this setup with usb (shell and printk's on the same ttyUSB). The system console works fine (thanks to you), and opening the device /dev/ttyUSB0 for sending additional debug info works too, but we can't read from the device. Read blocks and the characters don't arrive. If we disable the console support (no printk's, just a shell on ttyUSB0) everything's ok, but with the console enabled it becomes output only. :( I've checked the code a few times, but i'm too familiar with the usb/tty layers, and couldn't come up with a solution. Do you have an idea where i should look around? The other thing: (not too important) The kernel prints the message 'Unable to open an inital console' when booting with usb-serial-console, and i can't see the messages from init. This happens because the 'device' field is left empty in the 'struct console usbcons', so no tty device is associated with the console. Would it be possible the register the console with the apropriate tty device (ttyUSB0), istead of creating a dummy tty struct for the setup? (usb_console_setup()) This way the usb console would be identical in functionality to the standard uart solutuion.
Some info about the system: uClinux 2.6.14 (ARM/nommu) FTDI chip Thanks! George ------------------------------------------------------- This SF.Net email is sponsored by xPML, a groundbreaking scripting language that extends applications into web and mobile media. Attend the live webcast and join the prime developer group breaking into this new coding territory! http://sel.as-us.falkag.net/sel?cmd=lnk&kid0944&bid$1720&dat1642 _______________________________________________ linux-usb-devel@lists.sourceforge.net To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
