说明：  红外遥控,24键红外遥控,红外遥控器软件解码原理和程序(C51) 红外一开始发送一段13。5ms的引导码，引导码由9ms的高电平和4。5ms的低电平组成，跟着引导码是系统码，系统反码，按键码，按键反码.
(Infrared remote control, 24-key infrared remote control, infrared remote control software decoding principles and procedures (C51) started to send a IR 13. 5ms boot code, boot code from the 9ms high and 4. 5ms low-level components, along with guidance code is the system code, system, anti-code, key code, key counter code.)