4层电梯控制器（单向层层停控制方式）VHDL源程序(绝对通，符详细注释)-4-storey elevator controller (one-way stop control at each level) VHDL source code (absolute Tong, Fu detailed notes)

VHDL实现四层电梯的控制。状态机、编解码器、触发器、比较器。-Four layers of elevator control is realized by VHDL