Peripheral Descr iption: ; ; This peripheral enumerates as a vendor-specific device. The main event loop ; blinks an LED connected to RA1 on and off at about 2 Hz and the peripheral ; responds to a pair of vendor-specific requests that turn on or off an LED ; ; connected to RA0. The firmware is configured to use an external 4-MHz ; crystal, to operate as a low-speed USB device, and to use the internal ; pull-up resistor. ;