题解 | #含有无关项的序列检测#
含有无关项的序列检测
https://www.nowcoder.com/practice/cba67d06d6834a5d9b93e1087b56c8d8
`timescale 1ns/1ns
module sequence_detect(
input clk,
input rst_n,
input a,
output reg match
);
reg [8:0] data_reg;
always@(posedge clk or negedge rst_n) begin
if(!rst_n) begin
data_reg <= 9'd0;
end
else begin
data_reg <= {data_reg[7:0],a};
end
end
always@(posedge clk or negedge rst_n) begin
if(!rst_n) begin
match <= 1'b0;
end
else begin
match <= (data_reg[8:6]==3'b011) & (data_reg[2:0]==3'b110);
end
end
endmodule
