verilog数码管显示数字0到9
时间: 2024-02-10 18:05:05 浏览: 26
以下是Verilog代码实现数码管显示数字0到9:
```verilog
module digit_display(
input clk,
input [3:0] num,
output reg [6:0] segment
);
reg [3:0] count;
always @(posedge clk) begin
if(count == 4'd0) begin
case(num)
4'd0: segment = 7'b1000000;
4'd1: segment = 7'b1111001;
4'd2: segment = 7'b0100100;
4'd3: segment = 7'b0110000;
4'd4: segment = 7'b0011001;
4'd5: segment = 7'b0010010;
4'd6: segment = 7'b0000010;
4'd7: segment = 7'b1111000;
4'd8: segment = 7'b0000000;
4'd9: segment = 7'b0010000;
default: segment = 7'b1111111;
endcase
count <= 4'd1;
end else begin
count <= count + 1;
end
end
endmodule
```
该模块接受一个时钟信号 `clk`,一个 4 位数字 `num`,并输出一个 7 位数码管段 `segment`。在每个时钟周期,`count` 计数器递增,当 `count` == 0 时,使用 `case` 语句选择要显示的数字,并将其输出到 `segment`。在下一个时钟周期,`count` 计数器递增。当 `count` == 4 时,计数器将重置为 0,以便下一次显示数字。