这是一个51单片机采用中断PWM方式对直流电机进行调速。速度分为10个等级。包含正反转调速。里面还有几个非常经典的联合与结构共用的数据格式。-This is the speed of DC motor is a 51 single-chip interrupt PWM. Speed is divided into 10 grades. Contains the reversible speed. Combined with the structure of common data format