题解 | #输入序列连续的序列检测#
输入序列连续的序列检测
https://www.nowcoder.com/practice/d65c2204fae944d2a6d9a3b32aa37b39
`timescale 1ns/1ns module sequence_detect( input clk, input rst_n, input a, output reg match ); parameter A=4'd0,b=4'd1,c=4'd2,d=4'd3,e=4'd4,f=4'd5,g=4'd6,h=4'd7,i=4'd8; reg [3:0]state,next; always@(posedge clk,negedge rst_n) begin if(!rst_n) state<=A; else state<=next; end always@(*) begin case(state) A: next<=a?A:b; b: next<=a?c:b; c: next<=a?d:b; d: next<=a?e:b; e: next<=a?A:f; f: next<=a?A:g; g: next<=a?A:h; h: next<=a?i:b; i: next<=A; endcase end always@(posedge clk,negedge rst_n) begin if(!rst_n) match<=0; else if(state==i) match<=1; else match<=0; end endmodule
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