verilog实现红黄蓝三秒灯

代码如下

test.v文件

led.v文件

module test();

wire led_r,led_g,led_b;

reg clk = ;

always # clk <= ~clk;

led c1
(
    .clk(clk),
    .led_r(led_r),
    .led_g(led_g),
    .led_b(led_b)
);
endmodule

module led
(
    input clk,
    output reg led_r = ,
    output reg led_g = ,
    output reg led_b =
);
reg[:] cnt = ;  //计数器 

always @(posedge clk)  //
begin
    if(cnt <'d300*3)
        cnt <= cnt + ;
    else
        cnt <= ;
    case(cnt)
    'd300:
    begin
        led_r <= ;
        led_b <= ;
    end
    'd300*2:
    begin
        led_g <= ;
        led_r <= ;
    end
    'd300*3:
    begin
        led_b <= ;
        led_g <= ;
    end
    endcase
end

endmodule

下载链接

https://pan.baidu.com/s/1hIuLFWrNn9MFfHEn4PfEzg

测试仿真波形：