89c51步进电机的驱动设计.设计要求.

开机后，电机不转，按下启动键，电机旋转，速度为25 r/min，按下加1键速度增加，按下减1键，速度降低，最高速度为100 r/min,最低转速为25 r/min，按下停止键，电机停转。速度值要求在数码管上显示出来。

-89c51 stepper motor drive design. Design requirements. Turned on, the motor does not turn, press the start button, the motor rotation speed 25 r/min, press the button to add a speed increase by a button press, the speed reduction The maximum speed is 100 r/min, the minimum speed of 25 r/min, press the stop button, the motor stopped. Velocity required in the digital tube display.