格雷码用EDA代码表示三种描述风格
时间: 2024-02-28 16:57:04 浏览: 7
这里我提供三种不同的描述风格来表示格雷码的EDA代码:
1. 简洁的命令式描述风格:
```verilog
module gray_encoder(input [3:0] bin, output reg [3:0] gray);
always @(bin) begin
gray <= bin ^ (bin >> 1);
end
endmodule
```
2. 结构化的过程式描述风格:
```verilog
module gray_encoder(input [3:0] bin, output reg [3:0] gray);
always @(bin) begin
reg [3:0] temp = bin;
for (int i = 0; i < 3; i = i + 1) begin
temp[i] <= bin[i+1];
end
gray <= bin ^ temp;
end
endmodule
```
3. 面向对象的描述风格:
```systemverilog
class GrayEncoder;
logic [3:0] bin;
logic [3:0] gray;
function new(logic [3:0] bin, logic [3:0] gray);
this.bin = bin;
this.gray = gray;
endfunction
task encode;
gray = bin ^ (bin >> 1);
endtask
endclass
module top;
logic [3:0] bin;
logic [3:0] gray;
GrayEncoder encoder = new(bin, gray);
always @(bin) begin
encoder.encode();
end
endmodule
```