程序为用单片机软件制作的占空比均匀间隔可调PWM发生器。占空比可调间隔为0.1。即可取得占空比为0 ，10 ，20 ……90 到100 的PWM波。该波的频率固定为1KH（周期1000微秒）。该波的频率固定为1KH（周期1000微秒）。-Procedures for the use of SCM software to make evenly spaced adjustable PWM duty cycle generator. Adjustable duty cycle interval of 0.1. You can get 0　duty cycle, 10 , 20　... 90　to 100　of the PWM wave. The wave frequency is fixed at 1KH (cycle 1000 microseconds). The wave frequency is fixed at 1KH (cycle 1000 microseconds).