红外测试程序，用单片机通过发射管发射38K的调制频率码，由一体化接收并解码由发光管显示。

正常情况下，由于反射和高灵敏度接收，LED4（P1.3)一直闪烁，可以用黑色纸片完全遮挡接收头使之不能接收到发射管的信号，这是LED4熄灭。说明功能性正常-Infrared testing procedures, with the launch tube through the launch of single-chip 38K code modulation frequency, from integration to receive and decode from the LED display. Under normal circumstances, as a result of reflection and high-sensitivity receiver, LED4 (P1.3) has been flashing, you can completely block the black paper to receive the first launch tube can not receive the signal, which is put out LED4. Note the normal functional