说明：  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).)