本设计以AT89C51单片机为核心，以4*4矩阵键盘做为输入达到控制直流电机的启停、速度和方向，完成了基本要求和发挥部分的要求-The AT89C51 single-chip design as the core, 4* 4 matrix keyboard input as a DC motor to control the start and stop, speed and direction, completed the basic requirements and the requirements to play a part