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 program, microcontroller through the launch tube with a 38K code modulation frequency, from integration to receive and decode the LED display.* Under normal circumstances, due to reflection and high-sensitivity receiver, LED4 (P1.3) has been flashing, can be completely obscured with black paper to make* the receiver can not receive signals to the launch tube, which is LED4 off. Shows the normal functional