说明：  基于ATMEL89s52单片机，C++编写的PWM控制的电机控制源程序，可控制电机的正反转、增减速，编译效率高，生成代码短，可有效控制电机高速工作。
(ATMEL89s52 based microcontroller, prepared by the C PWM control of the motor control program. Motor control the rotating direction of change speed, compile high efficiency, short code generation, high-speed motor control work.)