自便串口调试程序，实现PC上位机控制为微理器，操作两路PWM信号-Feel free to serial debugger, to achieve control for the micro-PC host computer processor, operating two PWM signals

89C51的pwm程序，很好的程序呢，我试过了，还是我的作业呢。通俗易懂，希望对你有帮助。-The 89 C51 PWM program, very good program? I tried, or my homework. Easy to understand, the hope is helpful to you.