题解 | #状态机-非重叠的序列检测#
状态机-非重叠的序列检测
https://www.nowcoder.com/practice/2e35c5c0798249aaa2e1044dbaf218f2
`timescale 1ns/1ns module sequence_test1( input wire clk , input wire rst , input wire data , output reg flag ); wire rst_n = rst; //*************code***********// // 状态机比较好写 localparam s0 = 5'b00000, s1 = 5'b00001, s2 = 5'b00010, s3 = 5'b00100, s4 = 5'b01000, s5 = 5'b10000; reg [4:0] cur_st; reg [4:0] nxt_st; always @(posedge clk or negedge rst_n) begin if(~rst_n) cur_st <= s0; else cur_st <= nxt_st; end always @( *) begin case (cur_st) s0: nxt_st = data? s1 : s0; s1: nxt_st = data? s1 : s2; s2: nxt_st = data? s3 : s0; s3: nxt_st = data? s4 : s2; s4: nxt_st = data? s5 : s2; s5: nxt_st = data? s1 : s0; default: nxt_st = s0; endcase end always @(posedge clk or negedge rst_n) begin if(~rst_n) flag <= 1'b0; else begin flag <= (nxt_st==s5); end end //*************code***********// endmodule
状态机解题，Moore型状态机。
先画图再写代码。
加油！