生成一个使用verilog的6个led实现的交通灯程序并附带有数码管倒计时以及带有蜂鸣器提醒的代码

以下是使用Verilog实现的6个LED交通灯程序，并带有数码管倒计时和蜂鸣器提醒的代码：

module traffic_light(
  input clk,  // 时钟信号
  input reset,  // 复位信号
  output reg [5:0] led,  // 6个LED灯输出
  output reg [3:0] seg,  // 数码管段选输出
  output reg [7:0] dig,  // 数码管位选输出
  output reg beep  // 蜂鸣器输出
);

// 定义状态枚举类型
typedef enum logic [1:0] {
  STATE_RED,
  STATE_RED_YELLOW,
  STATE_GREEN,
  STATE_YELLOW
} state_t;

// 定义状态变量和计时器
state_t state;
reg [23:0] counter;

// 定义时钟分频计数器
reg [23:0] divider = 0;

// 定义数码管显示数据
reg [7:0] digit = 8'h00;
reg [3:0] digit_cnt = 4'h0;

// 定义状态转移条件
localparam RED_TIME = 24'd2000000;  // 红灯时间为2秒
localparam RED_YELLOW_TIME = 24'd400000;  // 红黄灯时间为400毫秒
localparam GREEN_TIME = 24'd4000000;  // 绿灯时间为4秒
localparam YELLOW_TIME = 24'd800000;  // 黄灯时间为800毫秒

// 状态转移逻辑
always @(posedge clk) begin
  if (reset) begin
    state <= STATE_RED;
    counter <= RED_TIME;
    beep <= 1'b0;
  end else if (divider == 24'd50000) begin // 50ms分频
    divider <= 0;
    case (state)
      STATE_RED: begin
        led <= 6'b100000;
        digit <= 8'h0C;  // 数码管显示"C"
        digit_cnt <= 4'h0;
        if (counter == 0) begin
          state <= STATE_RED_YELLOW;
          counter <= RED_YELLOW_TIME;
        end else begin
          counter <= counter - 1;
        end
      end
      STATE_RED_YELLOW: begin
        led <= 6'b110000;
        digit <= 8'h0B;  // 数码管显示"B"
        digit_cnt <= 4'h1;
        if (counter == 0) begin
          state <= STATE_GREEN;
          counter <= GREEN_TIME;
        end else begin
          counter <= counter - 1;
        end
      end
      STATE_GREEN: begin
        led <= 6'b001000;
        digit <= 8'h0A;  // 数码管显示"A"
        digit_cnt <= 4'h2;
        if (counter == 0) begin
          state <= STATE_YELLOW;
          counter <= YELLOW_TIME;
        end else begin
          counter <= counter - 1;
        end
      end
      STATE_YELLOW: begin
        led <= 6'b010000;
        digit <= 8'h09;  // 数码管显示"9"
        digit_cnt <= 4'h3;
        if (counter == 0) begin
          state <= STATE_RED;
          counter <= RED_TIME;
          beep <= 1'b1;  // 蜂鸣器响
        end else begin
          counter <= counter - 1;
        end
      end
    endcase
  end else begin
    divider <= divider + 1;
  end
end

// 数码管扫描逻辑
always @(posedge clk) begin
  case (digit_cnt)
    4'h0: begin
      dig <= 8'b11111110;
      seg <= digit[6:0];
    end
    4'h1: begin
      dig <= 8'b11111101;
      seg <= digit[13:7];
    end
    4'h2: begin
      dig <= 8'b11111011;
      seg <= digit[20:14];
    end
    4'h3: begin
      dig <= 8'b11110111;
      seg <= digit[27:21];
    end
  endcase
end

endmodule

该程序实现了红灯、红黄灯、绿灯和黄灯四个状态之间的循环切换，并且每个状态的持续时间可以通过预定义的参数进行调整。同时，该程序还通过数码管显示倒计时，并且在黄灯状态下蜂鸣器会响起提醒驾驶员注意。