Verilog 花样流水灯加数码管显示
时间: 2023-07-03 13:07:32 浏览: 77
以下是一个使用 Verilog 实现的带有花样流水灯和数码管显示的设计示例:
```verilog
module led_display(input clk, output reg [3:0] LED, output reg [6:0] SEG);
reg [26:0] counter;
reg [3:0] pattern;
always @(posedge clk) begin
if (counter == 27'd0) begin
counter <= 27'd1;
pattern <= pattern + 1;
end else begin
counter <= counter + 1;
end
end
always @(posedge clk) begin
case (pattern)
4'd0: LED <= 4'b0001; SEG <= 7'b1111110; // 0
4'd1: LED <= 4'b0010; SEG <= 7'b0110000; // 1
4'd2: LED <= 4'b0100; SEG <= 7'b1101101; // 2
4'd3: LED <= 4'b1000; SEG <= 7'b1111001; // 3
4'd4: LED <= 4'b0001; SEG <= 7'b0110011; // 4
4'd5: LED <= 4'b0010; SEG <= 7'b1011011; // 5
4'd6: LED <= 4'b0100; SEG <= 7'b1011111; // 6
4'd7: LED <= 4'b1000; SEG <= 7'b1110000; // 7
4'd8: LED <= 4'b0001; SEG <= 7'b1111111; // 8
4'd9: LED <= 4'b0010; SEG <= 7'b1110011; // 9
4'd10: LED <= 4'b0100; SEG <= 7'b1110111; // A
4'd11: LED <= 4'b1000; SEG <= 7'b0011111; // b
4'd12: LED <= 4'b0001; SEG <= 7'b1001111; // C
4'd13: LED <= 4'b0010; SEG <= 7'b0111101; // d
4'd14: LED <= 4'b0100; SEG <= 7'b1001110; // E
4'd15: LED <= 4'b1000; SEG <= 7'b1000111; // F
default: LED <= 4'b1111; SEG <= 7'b1111111; // off
endcase
end
endmodule
```
这个设计使用两个时钟域,一个用于计数器递增,另一个用于驱动 LED 和数码管。计数器的计数速度相对于时钟速度非常慢,因此在时钟域之间进行同步不是必需的。
设计的核心是 `pattern` 寄存器,它在每个时钟周期中递增,并通过 `case` 语句将其值映射到LED和数码管的输出。递增速度可以调整,以控制流水灯的速度。
这个设计中,代码使用了常量值来表示每个数字和字母的 LED 和数码管显示模式。在实际设计中,可能需要使用更高级的技术,例如 ROM 或 LUT 来存储这些模式。
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