设计一个自动售饮料机逻辑电路的设计用verilog需要实现仿真图程序
时间: 2024-02-28 08:56:21 浏览: 36
好的,以下是一个简单的自动售饮料机逻辑电路的Verilog代码和仿真图程序,以供参考:
```
// 自动售饮料机逻辑电路设计 - Verilog代码
module vending_machine(
input clk, // 时钟信号
input rst, // 复位信号
input [3:0] button, // 按钮输入,用于选择饮料
input [7:0] coin, // 硬币输入,用于付款
output reg disp[7:0],// 显示输出,用于显示饮料和价格
output reg motor, // 电机输出,用于发放饮料
output reg change[3:0] // 找零输出,用于找零
);
// 状态定义
parameter IDLE = 2'b00;
parameter SELECT = 2'b01;
parameter PAY = 2'b10;
parameter DISPENSE = 2'b11;
reg [1:0] state; // 状态寄存器
reg [3:0] drink; // 饮料选择寄存器
reg [7:0] price; // 饮料价格寄存器
reg [7:0] paid; // 已支付金额寄存器
reg [7:0] change; // 找零寄存器
// 显示模块
always @ (state, drink, price, paid)
begin
case (state)
IDLE: disp = 8'b00000000;
SELECT: disp = {price, drink};
PAY: disp = {8'b00000000, paid};
DISPENSE: disp = 8'b00000000;
endcase
end
// 选择模块
always @ (state, button)
begin
case (state)
IDLE: drink = 4'b0000;
SELECT: drink = button;
PAY: drink = drink;
DISPENSE: drink = drink;
endcase
end
// 付款模块
always @ (state, coin)
begin
case (state)
IDLE: price = 8'b00000000;
SELECT: price = {8'b00000000, 8'h0A, 8'h0D, 8'h14, 8'h1E}[button];
PAY: price = price;
DISPENSE: price = price;
endcase
if (coin == 8'h01 || coin == 8'h02 || coin == 8'h05 || coin == 8'h0A)
paid = paid + coin;
end
// 发放模块
always @ (state, paid)
begin
case (state)
IDLE: motor = 1'b0;
SELECT: motor = 1'b0;
PAY: motor = 1'b0;
DISPENSE: begin
if (paid >= price) begin
motor = 1'b1;
change = paid - price;
end
else begin
motor = 1'b0;
change = paid;
end
end
endcase
end
// 状态机
always @ (posedge clk or posedge rst)
begin
if (rst) begin
state <= IDLE;
paid <= 8'b00000000;
change <= 4'b0000;
end
else begin
case (state)
IDLE: begin
if (button != 4'b0000) begin
state <= SELECT;
end
end
SELECT: begin
if (coin != 8'b00000000) begin
state <= PAY;
end
end
PAY: begin
if (paid >= price) begin
state <= DISPENSE;
end
end
DISPENSE: begin
if (motor == 1'b0) begin
state <= IDLE;
end
end
endcase
end
end
endmodule
// 自动售饮料机逻辑电路设计 - 仿真图程序
`timescale 1ns / 1ps
module vending_machine_tb;
reg clk;
reg rst;
reg [3:0] button;
reg [7:0] coin;
wire [7:0] disp;
wire motor;
wire [3:0] change;
vending_machine uut(
.clk(clk),
.rst(rst),
.button(button),
.coin(coin),
.disp(disp),
.motor(motor),
.change(change)
);
initial begin
clk = 1'b0;
rst = 1'b1;
button = 4'b0000;
coin = 8'b00000000;
#100 rst = 1'b0;
#100;
// 选择饮料
button = 4'b0001;
#100 button = 4'b0010;
#100 button = 4'b0100;
#100 button = 4'b1000;
// 支付硬币
coin = 8'h01;
#100 coin = 8'h01;
#100 coin = 8'h02;
#100 coin = 8'h05;
#100 coin = 8'h0A;
// 等待发放
#100;
// 取饮料和找零
#100 coin = 8'h00;
#100;
end
always #50 clk = ~clk;
endmodule
```
上述代码定义了一个自动售饮料机模块,包括输入模块、显示模块、选择模块、付款模块和发放模块。仿真图程序模拟了用户选择饮料、支付硬币、取饮料和找零的过程,并通过显示输出、电机输出和找零输出反馈结果。您可以使用Verilog仿真工具(如ModelSim)进行仿真验证。
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