说明：  单片机I/O口控制红外发射管，模拟格力空调遥控器的代码。典型应用：上位机发送一个通用的“开机，温度，模式……”命令，单片机自动发射出和遥控器一摸一样的波形，实现智能遥控器的功能。
(MCU I/O port control infrared emission control, analog Gree air conditioner remote control code. Typical applications: host computer to send a generic " boot, temperature, mode ... ..." command, microcontroller and the remote control automatically emit the same wave first touch, intelligent remote control functions.)