Key&LED

Copy test porgram from \Examples\ key_led to development board and run it, Press the K3 and K4, See changes in the LED.

    # ./key_led /dev/input/event0 
    type:1, code:1, value:1
    type:1, code:1, value:0
    # ./key_led /dev/input/event0 
    type:1, code:102, value:1
    type:1, code:102, value:0