Nexys4数码管的代码
时间: 2023-06-14 16:05:56 浏览: 38
以下是使用Verilog语言编写的Nexys4数码管驱动代码:
```verilog
module nexys4_display(
input clk,
input reset,
input [15:0] data,
output reg [6:0] seg,
output reg [3:0] an
);
reg [25:0] cnt;
reg [3:0] digit;
always @(posedge clk or posedge reset) begin
if (reset) begin
cnt <= 0;
digit <= 0;
end else begin
if (cnt == 500000) begin
cnt <= 0;
digit <= digit + 1;
if (digit == 4) begin
digit <= 0;
end
end else begin
cnt <= cnt + 1;
end
end
end
always @(digit) begin
case (digit)
0: begin
seg <= 7'b1000000; //display 1st digit
an <= 4'b1110; //enable 1st digit
end
1: begin
seg <= 7'b1111001; //display 2nd digit
an <= 4'b1101; //enable 2nd digit
end
2: begin
seg <= 7'b0100100; //display 3rd digit
an <= 4'b1011; //enable 3rd digit
end
3: begin
seg <= 7'b0110000; //display 4th digit
an <= 4'b0111; //enable 4th digit
end
default: begin
seg <= 7'b1111111;
an <= 4'b1111;
end
endcase
end
always @(data) begin
case (data)
16'h0000: seg <= 7'b1111110; //display 0
16'h0001: seg <= 7'b0110000; //display 1
16'h0002: seg <= 7'b1101101; //display 2
16'h0003: seg <= 7'b1111001; //display 3
16'h0004: seg <= 7'b0110011; //display 4
16'h0005: seg <= 7'b1011011; //display 5
16'h0006: seg <= 7'b1011111; //display 6
16'h0007: seg <= 7'b1110000; //display 7
16'h0008: seg <= 7'b1111111; //display 8
16'h0009: seg <= 7'b1111011; //display 9
default: seg <= 7'b1111111;
endcase
end
endmodule
```
该代码实现了一个基本的数码管驱动器,可以在Nexys4 FPGA板上显示16位数据。其中,使用了时钟信号`clk`和复位信号`reset`,输入数据信号为`data`,数码管位于`seg`和`an`输出端口。在时钟上升沿时,数码管显示的数字会切换到下一个数字,直到显示完四个数字后,再从头开始循环显示。同时,根据输入数据的值,数码管会显示相应的数字。