题解 | #输入序列不连续的序列检测#
输入序列不连续的序列检测
https://www.nowcoder.com/practice/f96d0e94ec604592b502b0f1800ed8aa
`timescale 1ns/1ns
module sequence_detect(
input clk,
input rst_n,
input data,
input data_valid,
output reg match
);
reg [3:0] shift_reg;
always @(posedge clk or negedge rst_n)begin
if(!rst_n)begin
shift_reg <= 4'b0;
end
else begin
if(data_valid)begin
shift_reg <= {shift_reg[2:0],data};
end
else begin
shift_reg <= {shift_reg[2:0],1'b0};
end
end
end
always @(*)begin
if(!rst_n)begin
match = 1'b0;
end
else begin
if(shift_reg == 4'b0110)begin
match = 1'b1;
end
else begin
match = 1'b0;
end
end
end
endmodule
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