出租车计费器verilog

根据提供的引用内容，以下是一个使用Verilog语言实现出租车计费器的简单示例：

module TaxiMeter(
  input clk, // 时钟信号
  input reset, // 复位信号
  input start, // 启动信号
  input stop, // 停止信号
  input wait, // 等待信号
  output reg [3:0] distance, // 里程显示
  output reg [3:0] amount // 金额显示
);

reg [3:0] pulse_count; // 脉冲计数器
reg [3:0] wait_count; // 等待计数器
reg [3:0] total_distance; // 总里程
reg [3:0] total_amount; // 总金额
reg [3:0] base_distance = 3; // 基本里程
reg [3:0] base_amount = 5; // 起步价
reg [3:0] per_km_amount = 2; // 每公里加价
reg [3:0] per_min_amount = 1; // 每分钟等待加价

always @(posedge clk or posedge reset) begin
  if (reset) begin
    pulse_count <= 0;
    wait_count <= 0;
    total_distance <= 0;
    total_amount <= 0;
    distance <= 0;
    amount <= 0;
  end else begin
    if (start) begin
      pulse_count <= 0;
      wait_count <= 0;
      total_distance <= 0;
      total_amount <= 0;
      distance <= 0;
      amount <= base_amount;
    end else if (stop) begin
      distance <= total_distance;
      amount <= total_amount;
    end else if (wait) begin
      wait_count <= wait_count + 1;
      total_amount <= total_amount + per_min_amount;
    end else begin
      pulse_count <= pulse_count + 1;
      if (pulse_count == 10) begin
        pulse_count <= 0;
        total_distance <= total_distance + 1;
        if (total_distance > base_distance) begin
          total_amount <= total_amount + per_km_amount;
        end
      end
    end
  end
end

endmodule