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菜鸟第一次发文，模仿了dalao的状态图，然后自己画了一下，根据状态图将代码写出来。

计数超过20并且在地上时才能够飞溅。

module top_module(    input clk,    input areset,    // Freshly brainwashed Lemmings walk left.    input bump_left,    input bump_right,    input ground,    input dig,    output walk_left,    output walk_right,    output aaah,    output digging );     reg [2:0] state,next;    reg [7:0] cnt;    parameter A=3'd0,B=3'd1,C=3'd2,D=3'd3,E=3'd4,F=3'd5,G=3'd6;     //A左，B左挖，C左掉，D右，E右挖，F右掉,G飞溅    always @(posedge clk or posedge areset)        begin            if(areset)                state <= A;            else                state <= next;        end    always @(*)        begin            case(state)                A:next = ground?(dig?B:(bump_left?D:A)):C;                B:next = ground?B:C;                C:next = cnt>=20?(ground?G:C):(ground?A:C);                D:next = ground?(dig?E:(bump_right?A:D)):F;                E:next = ground?E:F;                F:next = cnt>=20?(ground?G:F):(ground?D:F);                G:next = G;            endcase        end    always @(posedge clk)        begin            case(state)                C:cnt <= cnt + 1;                F:cnt <= cnt + 1;                default:cnt <= 0;            endcase        end    assign walk_left = (state == A);    assign walk_right = (state == D);    assign aaah = (state == C) | (state == F);    assign digging = (state == B) | (state == E);            endmodule

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