用Verlog代码写一个Moore型状态机,要求能设计一个可以识别“01101”的序列检测电路
时间: 2023-11-27 07:52:19 浏览: 65
FPGA设计之 使用Moore状态机 设计序列检测器“101001”
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以下是一个可以识别“01101”的序列检测电路的Moore型状态机的Verilog代码:
```
module sequence_detector (
input clk,
input reset_n,
input data,
output reg detected
);
parameter IDLE = 2'b00;
parameter READ_0 = 2'b01;
parameter READ_01 = 2'b10;
parameter READ_011 = 2'b11;
reg [1:0] state;
always @(posedge clk or negedge reset_n) begin
if (~reset_n) begin
state <= IDLE;
detected <= 0;
end else begin
case (state)
IDLE: begin
if (data == 0) begin
state <= READ_0;
detected <= 0;
end else begin
state <= IDLE;
detected <= 0;
end
end
READ_0: begin
if (data == 1) begin
state <= READ_01;
detected <= 0;
end else begin
state <= IDLE;
detected <= 0;
end
end
READ_01: begin
if (data == 1) begin
state <= READ_01;
detected <= 0;
end else if (data == 0) begin
state <= READ_011;
detected <= 0;
end else begin
state <= IDLE;
detected <= 0;
end
end
READ_011: begin
if (data == 0) begin
state <= READ_0;
detected <= 0;
end else if (data == 1) begin
state <= READ_01;
detected <= 0;
end else if (data == 1) begin
state <= READ_011;
detected <= 1;
end else begin
state <= IDLE;
detected <= 0;
end
end
default: begin
state <= IDLE;
detected <= 0;
end
endcase
end
end
endmodule
```
该状态机有四个状态:IDLE、READ_0、READ_01和READ_011。当输入序列为“01101”时,该状态机会检测到并将输出detected设置为1。注意,在每个状态下,如果输入不符合预期,状态机都会返回到IDLE状态,并将输出detected设置为0。
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