Device Controller Driver (DCD) server for universal serial bus (USB)
io-usb-dcd [-d dll [opts] ] [-n name] [-P priority]... [-V] [-v]
QNX Neutrino
The io-usb-dcd Device Controller Driver (DCD) server contains USB protocols and communicates with clients (function drivers). The USB stack is a server/dll interface that the server uses to load the DLLs that manage the USB chips. You can load drivers when you start io-usb-dcd by specifying the -d command-line option.
Once io-usb-dcd has started, you can dynamically load and unload modules using the mount and umount commands.
The io-usb-dcd controller uses the LD_LIBRARY_PATH environment variable when searching for the shared objects. If LD_LIBRARY_PATH is not set, or the shared object in question isn't in one of its directories, or you want to override the default, specify the full path in the mount command.
# Create an 8 MB RAM disk: devb-ram ram capacity=16384,nodinit blk cache=0m # Format the RAM disk as a DOS filesystem (substitute # the /dev/hd entry created by devb-ram): mkdosfs /dev/hdn # Start the USB stack: io-usb-dcd -dusbumass-$(HW_VARIANT) ioport=ioport,irq=irq # Load the mass-storage function driver: devu-umass_client-block -l lun=0,devno=1,iface=0,fname=/dev/hdn # Turn on the link (enables connection to the USB host): ulink_ctrl -l 1