Add functions to enable and disable USB interrupts, and document how to use these functions to run usbd_poll() from the usb ISR. Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
Add minimal documentation for the USB driver. The internal functions and structs are excluded. Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>