/* register a pointer to a descriptor block 
This function registers a pointer to a descriptor block containing all descriptors for the device. */
static void usb_register_descriptors(const uint8_t *usb_descriptors)
/* register a pointer to a descriptor block 
This function registers a pointer to a descriptor block containing all descriptors for the device. */
static void usb_register_descriptors(const uint8_t *usb_descriptors)
{
	usb_dev.descriptors = usb_descriptors;
}