题解 | #根据状态转移写状态机-二段式#
根据状态转移写状态机-二段式
https://www.nowcoder.com/practice/5b2ff27610d04993ae92374d51bfc2e6
`timescale 1ns/1ns module fsm2( input wire clk , input wire rst , input wire data , output reg flag ); //*************code***********// parameter S0 = 3'b000; parameter S1 = 3'b001; parameter S2 = 3'b010; parameter S3 = 3'b011; parameter S4 = 3'b100; reg [2:0] c_state; reg [2:0] n_state; always@(posedge clk or negedge rst) begin if(!rst) begin c_state <= S0; end else begin c_state <= n_state; end end always @(*) begin if(!rst) begin n_state <= S0; flag <= 0; end else begin case(c_state) S0: begin n_state <= (data == 1)? S1:S0; flag <= 0; end S1: begin n_state <= (data == 1)? S2:S1; flag <= 0; end S2: begin n_state <= (data == 1)? S3:S2; flag <= 0; end S3: begin n_state <= (data == 1)? S4:S3; flag <= 0; end S4: begin n_state <= (data == 1)? S1:S0; flag <= 1; end endcase end end //*************code***********// endmodule