比较时钟的另类应用---模拟发送红外遥控的波形 比较时钟一般用来作一个固定的定时器，做系统时钟或固定的时钟任务，-Comparison of the alternative application of the clock to send the infrared remote control--- Simulation waveforms generally used for clock compared to a fixed timer, so the system clock or t