verilog语言4层电梯
时间: 2023-10-06 22:11:11 浏览: 49
以下是一个简单的 Verilog 代码实现 4 层电梯的功能:
```verilog
module elevator(
input clk,
input reset,
input [1:0] floor_select,
input door_open,
output reg [1:0] current_floor,
output reg door_status
);
parameter FLOOR1 = 2'b00;
parameter FLOOR2 = 2'b01;
parameter FLOOR3 = 2'b10;
parameter FLOOR4 = 2'b11;
enum [3:0] state { IDLE, MOVING_UP, MOVING_DOWN, DOOR_OPEN };
reg [3:0] current_state;
always @(posedge clk) begin
if (reset) begin
current_floor <= FLOOR1;
door_status <= 0;
current_state <= IDLE;
end
else begin
case(current_state)
IDLE: begin
if (floor_select != current_floor) begin
if (floor_select > current_floor) current_state <= MOVING_UP;
else current_state <= MOVING_DOWN;
end
else if (door_open) current_state <= DOOR_OPEN;
end
MOVING_UP: begin
if (current_floor < FLOOR4) current_floor <= current_floor + 1;
else current_state <= DOOR_OPEN;
if (floor_select == current_floor) current_state <= DOOR_OPEN;
end
MOVING_DOWN: begin
if (current_floor > FLOOR1) current_floor <= current_floor - 1;
else current_state <= DOOR_OPEN;
if (floor_select == current_floor) current_state <= DOOR_OPEN;
end
DOOR_OPEN: begin
if (!door_open) begin
door_status <= 0;
current_state <= IDLE;
end
end
endcase
end
end
endmodule
```
该代码使用了一个有限状态机来控制电梯的运动。在空闲状态下,如果有新的目的地被选择,则电梯会向上或向下移动,直到到达目标楼层。一旦到达目标楼层,电梯门会打开。如果在任何时候门打开,则电梯将进入门打开状态,并等待门关闭。