0) change relevant defines in usb_core.c
1) modprobe usbserial vendor=0x0781 product=0x7421 debug=1
2) picocom /dev/ttyUSB0
3) look at your logf screen if you build with logf support and enabled LOGF_ENABLE define in usb_serial.c
I also modified usb_core so that storage and serial both can make use the the 'usb_core'-thread. More will come :)
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@15850 a1c6a512-1295-4272-9138-f99709370657
