红外线遥控接收程序，接收的是一个电视遥控器编码，共25个按锓　 20140727经过调试，可以正常收码;收到的码按从高到低，存放在rx3,rx2,rx1,rx0四个寄存器中。(Infrared remote control receiver program, receiving is a TV remote encoding, a total of 25 to 20140727 Qin after debugging, can normally receive code; the code according to the received from high to low, stored in RX3, rx2, rx1, rx0 in the four registers.)