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 match_a,match_b; reg [8:0] temp; always@(posedge clk or negedge rst_n) begin if(!rst_n) match_a <= 1'b0; else if(temp[8:6]==3'b011) match_a <= 1'b1; else match_a <= 1'b0; end always@(posedge clk or negedge rst_n) begin if(!rst_n) match_b <= 1'b0; else if(temp[2:0]==3'b110) match_b <=1'b1; else match_b <= 1'b0; end always@(posedge clk or negedge rst_n) begin if(!rst_n) temp <= 9'b0; else temp <= {temp[7:0],a}; end always@(*) begin match <= match_a&&match_b; end endmodule