题解 | #格雷码计数器#
格雷码计数器
https://www.nowcoder.com/practice/311754bcd45d42eb8d981eeddbdf1e43
`timescale 1ns/1ns
module gray_counter(
input clk,
input rst_n,
output reg [3:0] gray_out
);
reg [4:0]cnt_bin;
always@(posedge clk or negedge rst_n)begin
if(!rst_n)begin
cnt_bin<=0;
end
else begin
cnt_bin<=cnt_bin+1;
end
end
wire [3:0]bin;
assign bin = cnt_bin[4:1];
always@(gray_out,bin)begin
gray_out[3] = bin[3];
gray_out[2] = bin[3] ^ bin[2];
gray_out[1] = bin[2] ^ bin[1];
gray_out[0] = bin[1] ^ bin[0];
end
endmodule
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