用状态机实现110101序列检测的verilog代码
时间: 2023-12-18 20:04:37 浏览: 76
FMS状态机,使用状态机来实现的verilog代码.rar
下面是使用状态机实现110101序列检测的verilog代码:
```verilog
module sequence_detector(
input clk, rst, in,
output reg out
);
// 定义状态
parameter IDLE = 2'b00;
parameter S1 = 2'b01;
parameter S2 = 2'b10;
parameter S3 = 2'b11;
// 定义状态寄存器和下一个状态寄存器
reg [1:0] state, next_state;
// 初始化状态寄存器和下一个状态寄存器
initial begin
state = IDLE;
next_state = IDLE;
end
// 定义状态转移逻辑
always@(posedge clk, posedge rst) begin
if(rst) begin
state <= IDLE;
next_state <= IDLE;
end
else begin
state <= next_state;
case(state)
IDLE: if(in == 1'b1) next_state = S1;
else next_state = IDLE;
S1: if(in == 1'b1) next_state = S1;
else next_state = S2;
S2: if(in == 1'b0) next_state = S2;
else next_state = S3;
S3: if(in == 1'b1) next_state = IDLE;
else next_state = S2;
default: next_state = IDLE;
endcase
end
end
// 定义输出逻辑
always@(state, in) begin
case(state)
IDLE: out = 1'b0;
S1: out = 1'b0;
S2: out = 1'b0;
S3: out = 1'b1;
default: out = 1'b0;
endcase
end
endmodule
```
这个代码使用了四个状态来实现序列的检测。通过组合逻辑来确定下一个状态,再通过状态转移逻辑来更新状态寄存器和下一个状态寄存器。输出逻辑根据当前状态来确定输出值。
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