个人写的程序，见笑，两个功能：1、实现微妙级别的时间控制。2、控制并口输出的信号波形，三口的方波，详细使用方式和我联系-personal written procedures, laughed at, the two functions : one, to achieve a delicate time control level. 2, the parallel port control output signal waveform, three of the square, use and