`timescale 1ns / 1ps module control_tb; // Inputs reg clk; reg rst_n; reg [4:0] light_time; // Outputs reg [2:0] RGY_led_1 ;//位选 reg [2:0] RGY_led_2 ; //段选 // Instantiate the Unit Under Test (UUT) control z4 ( .clk(clk), .rst_n(rst_n), .light_time(light_time), .RGY_led_1(RGY_led_1), .RGY_led_2(RGY_led_2) ); parameter CYCLE = 10; parameter RST_TIME = 20 ; initial begin clk = 0; forever #(CYCLE/2) clk=~clk; end initial begin rst_n = 0; #2; rst_n= 1; #(CYCLE*RST_TIME); rst_n = 0; end initial begin light_time=5'b00000; RGY_led_1=3'b000; RGY_led_2=3'b000; #200 light_time=5'b00001; RGY_led_1=3'b001; RGY_led_2=3'b001; #200 light_time=5'b00010; RGY_led_1=3'b010; RGY_led_2=3'b010; #200 light_time=5'b00100; RGY_led_1=3'b100; RGY_led_2=3'b100; #200 light_time=5'b01000; RGY_led_1=3'b001; RGY_led_2=3'b001; #200 light_time=5'b10000; RGY_led_1=3'b010; RGY_led_2=3'b010; end endmodule

这是一个 Verilog 代码，用于实现一个控制器模块的测试台，其中包括时钟、复位、灯时间和 LED 灯的输出。具体来说，该代码实例化了一个名为 "control" 的模块，并将时钟、复位、灯时间和 LED 灯输出与该模块的输入和输出端口相连。在初始化过程中，时钟被设置为 0，并且通过 forever 循环来控制时钟的变化。复位信号被设置为 0，保持 2 个时钟周期后被设置为 1，然后等待 200 个时钟周期后再次被设置为 0。在主要的测试代码块中，灯时间被设置为一个二进制数值，代表对应 LED 灯应该亮起的时间，这些时间会依次发生，并且 LED 灯的输出也会随之发生变化。

相关问题

`timescale 1ns / 1ps module debounce_tb; // Inputs reg sys_clk; reg sys_rst_n; reg key; // Outputs reg key_flag; reg key_value; // Instantiate the Unit Under Test (UUT) debounce z3 ( .sys_clk(sys_clk), .sys_rst_n(sys_rst_n), .key(key), .key_flag(key_flag), .key_value(key_value)); parameter CYCLE = 10; parameter RST_TIME = 20 ; initial begin sys_clk= 0; forever #(CYCLE/2) sys_clk=~sys_clk; end initial begin sys_rst_n = 0; #2; sys_rst_n= 1; #(CYCLE*RST_TIME); sys_rst_n = 0; end initial begin key= 0; forever #(CYCLE/2) key=~key; end initial begin key_flag= 0; forever #(CYCLE/2) key_flag=~key_flag; end initial begin key_value= 0; forever #(CYCLE/2) key_value=~ key_value; end endmodule

这是一个 Verilog 代码，用于测试 debounce 模块。其中，debounce 模块有四个输入：sys_clk, sys_rst_n, key 和一个输出：key_flag 和 key_value。在这个测试代码中，sys_clk 是一个时钟信号，sys_rst_n 是一个复位信号，key 是一个输入信号，key_flag 和 key_value 是输出信号。

这个测试代码的功能是模拟输入信号 key 的变化，并且将 debounce 模块的输出结果 key_flag 和 key_value 记录下来。同时，也对时钟信号和复位信号进行模拟，以保证测试环境的准确性。

写出以下代码的testbench module decode8(clk_50m,rst_n,c,seg,sel,out,led); input[4:0] c; input clk_50m,rst_n; output reg[6:0]out;//共阳，0点亮 output reg[7:0]seg;//共阴，1点亮 output reg[2:0]sel;//位选 output reg[3:0] led; reg[31:0] timer; reg clk_1hz; always@(posedge clk_50m) begin if(~rst_n) begin timer<=0;clk_1hz<=0;end else if(timer==32'd24)//仿真时可调小 begin timer<=0;clk_1hz<=~clk_1hz;end else begin timer<=timer+1;clk_1hz<=clk_1hz;end end always@(c) if(c[4]==0) begin case(c) 5'b00000:begin led=4'b0000; out =7'b1000000; end //0 5'b00001:begin led=4'b0001; out =7'b1111001; end //1 5'b00010:begin led=4'b0010; out =7'b0100100; end //2 5'b00011:begin led=4'b0011; out =7'b0110000; end //3 5'b00100:begin led=4'b0100; out =7'b0011001; end //4 5'b00101:begin led=4'b0101; out =7'b0010010; end //5 5'b00110:begin led=4'b0110; out =7'b0000010; end //6 5'b00111:begin led=4'b0111; out =7'b1111000; end //7 5'b01000:begin led=4'b1000; out =7'b0000000; end //8 5'b01001:begin led=4'b1001; out =7'b0010000; end //9 5'b01010:begin led=4'b1010; out =7'b0001000; end //A 5'b01011:begin led=4'b1011; out =7'b0000011; end //B 5'b01100:begin led=4'b1100; out =7'b1000110; end //C 5'b01101:begin led=4'b1101; out =7'b0010001; end //D 5'b01110:begin led=4'b1110; out =7'b0000110; end //E 5'b01111:begin led=4'b1111; out =7'b0001110; end //F default:begin led=4'b0000; out =7'b1111111; end endcase end else begin led =4'b0000; out =7'b1111111;end always@(posedge clk_1hz) if(c[4]==1) begin case(sel) 3'b000:begin sel =3'b001; seg =8'b01110110; end //H 3'b001:begin sel =3'b010; seg =8'b01111001; end //E 3'b010:begin sel =3'b011; seg =8'b00111000; end //L 3'b011:begin sel =3'b100; seg =8'b00111000; end //L 3'b100:begin sel =3'b101; seg =8'b00111111; end //0 default: begin sel =3'b000; seg=8'b00000000; end endcase end else seg=8'b00000000; endmodule

以下是该代码的testbench：

`timescale 1ns / 1ps

module decode8_tb;

    // Inputs
    reg clk_50m = 0;
    reg rst_n = 0;
    reg [4:0] c = 5'b00000;

    // Outputs
    wire [6:0] out;
    wire [7:0] seg;
    wire [2:0] sel;
    wire [3:0] led;

    // Instantiate the Unit Under Test (UUT)
    decode8 uut (
        .clk_50m(clk_50m), 
        .rst_n(rst_n), 
        .c(c), 
        .seg(seg), 
        .sel(sel), 
        .out(out), 
        .led(led)
    );

    initial begin
        // Initialize Inputs
        clk_50m = 0;
        rst_n = 0;
        c = 5'b00000;

        #100; // Wait 100 ns for reset to finish

        // Reset
        rst_n = 1;

        // Testcase 1: Output should be 0
        c = 5'b00000;
        #100;
        if(out !== 7'b1000000 || led !== 4'b0000) $display("Error in Testcase 1");

        // Testcase 2: Output should be 1
        c = 5'b00001;
        #100;
        if(out !== 7'b1111001 || led !== 4'b0001) $display("Error in Testcase 2");

        // Testcase 3: Output should be 2
        c = 5'b00010;
        #100;
        if(out !== 7'b0100100 || led !== 4'b0010) $display("Error in Testcase 3");

        // Testcase 4: Output should be 3
        c = 5'b00011;
        #100;
        if(out !== 7'b0110000 || led !== 4'b0011) $display("Error in Testcase 4");

        // Testcase 5: Output should be 4
        c = 5'b00100;
        #100;
        if(out !== 7'b0011001 || led !== 4'b0100) $display("Error in Testcase 5");

        // Testcase 6: Output should be 5
        c = 5'b00101;
        #100;
        if(out !== 7'b0010010 || led !== 4'b0101) $display("Error in Testcase 6");

        // Testcase 7: Output should be 6
        c = 5'b00110;
        #100;
        if(out !== 7'b0000010 || led !== 4'b0110) $display("Error in Testcase 7");

        // Testcase 8: Output should be 7
        c = 5'b00111;
        #100;
        if(out !== 7'b1111000 || led !== 4'b0111) $display("Error in Testcase 8");

        // Testcase 9: Output should be 8
        c = 5'b01000;
        #100;
        if(out !== 7'b0000000 || led !== 4'b1000) $display("Error in Testcase 9");

        // Testcase 10: Output should be 9
        c = 5'b01001;
        #100;
        if(out !== 7'b0010000 || led !== 4'b1001) $display("Error in Testcase 10");

        // Testcase 11: Output should be A
        c = 5'b01010;
        #100;
        if(out !== 7'b0001000 || led !== 4'b1010) $display("Error in Testcase 11");

        // Testcase 12: Output should be B
        c = 5'b01011;
        #100;
        if(out !== 7'b0000011 || led !== 4'b1011) $display("Error in Testcase 12");

        // Testcase 13: Output should be C
        c = 5'b01100;
        #100;
        if(out !== 7'b1000110 || led !== 4'b1100) $display("Error in Testcase 13");

        // Testcase 14: Output should be D
        c = 5'b01101;
        #100;
        if(out !== 7'b0010001 || led !== 4'b1101) $display("Error in Testcase 14");

        // Testcase 15: Output should be E
        c = 5'b01110;
        #100;
        if(out !== 7'b0000110 || led !== 4'b1110) $display("Error in Testcase 15");

        // Testcase 16: Output should be F
        c = 5'b01111;
        #100;
        if(out !== 7'b0001110 || led !== 4'b1111) $display("Error in Testcase 16");

        // Testcase 17: Invalid input, output should be 1111111
        c = 5'b11011;
        #100;
        if(out !== 7'b1111111 || led !== 4'b0000) $display("Error in Testcase 17");

        // Testcase 18: Display H on the 1st segment
        c = 5'b10000;
        sel = 3'b000;
        #100;
        if(seg !== 8'b01110110) $display("Error in Testcase 18");

        // Testcase 19: Display E on the 2nd segment
        c = 5'b10000;
        sel = 3'b001;
        #100;
        if(seg !== 8'b01111001) $display("Error in Testcase 19");

        // Testcase 20: Display L on the 3rd segment
        c = 5'b10000;
        sel = 3'b010;
        #100;
        if(seg !== 8'b00111000) $display("Error in Testcase 20");

        // Testcase 21: Display L on the 4th segment
        c = 5'b10000;
        sel = 3'b011;
        #100;
        if(seg !== 8'b00111000) $display("Error in Testcase 21");

        // Testcase 22: Display 0 on the 5th segment
        c = 5'b10000;
        sel = 3'b100;
        #100;
        if(seg !== 8'b00111111) $display("Error in Testcase 22");

        // Testcase 23: Invalid input, no segment should be active
        c = 5'b11011;
        sel = 3'b000;
        #100;
        if(seg !== 8'b00000000) $display("Error in Testcase 23");
    end

    always #10 clk_50m <= ~clk_50m;

endmodule