01101011序列检测器FPGA代码
时间: 2023-11-12 10:00:31 浏览: 68
以下是一个简单的 01101011 序列检测器的 FPGA 代码示例:
```verilog
module seq_detector (
input clk,
input reset,
input data,
output reg detected
);
reg [7:0] state;
parameter IDLE = 8'b00000000;
parameter S0 = 8'b00000001;
parameter S1 = 8'b00000010;
parameter S2 = 8'b00000101;
parameter S3 = 8'b00001011;
parameter S4 = 8'b00010110;
parameter S5 = 8'b00101100;
parameter S6 = 8'b01011001;
parameter S7 = 8'b10110010;
always @(posedge clk) begin
if (reset) begin
state <= IDLE;
detected <= 0;
end else begin
case (state)
IDLE: begin
if (data) begin
state <= S0;
end
end
S0: begin
if (!data) begin
state <= IDLE;
end else begin
state <= S1;
end
end
S1: begin
if (data) begin
state <= S2;
end else begin
state <= IDLE;
end
end
S2: begin
if (!data) begin
state <= IDLE;
end else begin
state <= S3;
end
end
S3: begin
if (data) begin
state <= S4;
end else begin
state <= IDLE;
end
end
S4: begin
if (!data) begin
state <= IDLE;
end else begin
state <= S5;
end
end
S5: begin
if (data) begin
state <= S6;
end else begin
state <= IDLE;
end
end
S6: begin
if (!data) begin
state <= IDLE;
end else begin
state <= S7;
end
end
S7: begin
if (!data) begin
detected <= 1;
end
state <= IDLE;
end
endcase
end
end
endmodule
```
这个代码使用一个有 8 个状态的有限状态机来检测 01101011 序列。当检测到序列时,会将 detected 输出置为 1。注意,在每个状态之间都需要进行条件判断,以确定下一个状态。如果输入数据与期望的序列不匹配,则状态会回到 IDLE。这样可以保证在输入错误数据时,状态机可以重新开始检测序列。