C8051F，此程序接收红外发射过来的数据，接收解码后由CPU读取,程序运行前将S2都拨到ON.J17短接第一和第二脚-C8051F, this procedure to receive data from infrared emission, receiving decoded by the CPU to read, the program is running before S2 are shorted ON.J17 allocated first and second legs