8位流水灯程序verilog_花样流水灯2：双灯左移右移与闪烁

好的，下面是8位流水灯程序verilog_花样流水灯2的代码，包括双灯左移、右移和闪烁功能：

module led_flow(
  input clk, //时钟信号
  output reg [7:0] led //LED输出信号
);

reg [7:0] pattern; //模式寄存器
reg [1:0] direction; //方向寄存器
reg [1:0] blink; //闪烁寄存器
reg [3:0] counter; //计数器

always @(posedge clk) begin
  //计数器加1
  counter <= counter + 1;
  //根据计数器值更新模式寄存器
  case(counter)
    4'd0: pattern <= 8'b00000001;
    4'd1: pattern <= 8'b00000010;
    4'd2: pattern <= 8'b00000100;
    4'd3: pattern <= 8'b00001000;
    4'd4: pattern <= 8'b00010000;
    4'd5: pattern <= 8'b00100000;
    4'd6: pattern <= 8'b01000000;
    4'd7: pattern <= 8'b10000000;
    4'd8: pattern <= 8'b00000001;
    4'd9: pattern <= 8'b00000010;
    4'd10: pattern <= 8'b00000100;
    4'd11: pattern <= 8'b00001000;
    4'd12: pattern <= 8'b00010000;
    4'd13: pattern <= 8'b00100000;
    4'd14: pattern <= 8'b01000000;
    4'd15: pattern <= 8'b10000000;
  endcase
  //根据方向寄存器更新LED输出信号
  case(direction)
    2'b00: led <= pattern;
    2'b01: led <= {pattern[0], pattern[1], pattern[2], pattern[3], pattern[4], pattern[5], pattern[6], pattern[7]};
    2'b10: led <= {pattern[7], pattern[6], pattern[5], pattern[4], pattern[3], pattern[2], pattern[1], pattern[0]};
  endcase
  //根据闪烁寄存器更新LED输出信号
  if(blink == 2'b01) begin
    led <= 8'b00000000;
  end else if(blink == 2'b10) begin
    led <= pattern;
  end
end

//按键控制方向和闪烁
always @(*) begin
  case({btn1, btn0})
    2'b00: begin
      direction = 2'b00;
      blink = 2'b00;
    end
    2'b01: direction = 2'b01;
    2'b10: direction = 2'b10;
    2'b11: blink = ~blink;
  endcase
end

endmodule

其中，模式寄存器pattern保存当前的流水灯模式，方向寄存器direction保存当前的移动方向，闪烁寄存器blink保存当前的闪烁状态，计数器counter用于控制模式的切换。按键btn1和btn0用于控制方向和闪烁。

在时钟信号的上升沿，计数器加1，根据计数器值更新模式寄存器。根据方向寄存器更新LED输出信号，如果闪烁寄存器为01，则LED输出全灭；如果闪烁寄存器为10，则LED输出当前模式。按键控制方向和闪烁，根据按键的值更新方向寄存器和闪烁寄存器。

希望这个代码能够帮到你！