Add minimal documentation for the USB driver. The internal functions and structs are excluded. Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
Implement a basic driver for the LM4F USB controller. The driver is in a basic form. DMA is not yet implemented. Double-buffering is supported by the hardware, but is not yet implemented Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>