用verilog 写一个mealy型序,拥有8种状态的序列检测机
时间: 2024-03-10 12:49:35 浏览: 158
下面是一个Verilog代码示例,实现一个具有8种状态的Mealy型序列检测机,用于检测序列10110010。
```
module sequence_detector_mealy(
input clk,
input reset,
input data,
output reg detect
);
// 状态定义
typedef enum logic [2:0] {
S0,
S1,
S2,
S3,
S4,
S5,
S6,
S7
} state_t;
// 状态寄存器和输出寄存器
reg [2:0] state;
reg detect_reg;
// 状态转移逻辑
always @(posedge clk, negedge reset) begin
if (~reset) begin
state <= S0;
detect_reg <= 1'b0;
end
else begin
case (state)
S0: if (data) state <= S1;
else state <= S0;
S1: if (data) state <= S2;
else state <= S0;
S2: if (~data) state <= S3;
else state <= S0;
S3: if (data) state <= S4;
else state <= S0;
S4: if (data) state <= S5;
else state <= S0;
S5: if (~data) state <= S6;
else state <= S0;
S6: if (data) state <= S7;
else state <= S0;
S7: if (data) begin
state <= S0;
detect_reg <= 1'b1;
end
else state <= S0;
endcase
end
end
// 输出逻辑
always @(state, data) begin
case (state)
S0, S1, S2, S3, S4, S5, S6: detect = 1'b0;
S7: detect = detect_reg;
endcase
end
endmodule
```
这个序列检测机包含一个状态寄存器和一个输出寄存器,以及一个Mealy型状态转移逻辑和输出逻辑。在每个时钟周期的上升沿,状态转移逻辑会根据当前状态和输入数据来更新状态寄存器,并在检测到10110010序列时更新输出寄存器。输出逻辑根据当前状态和输出寄存器来生成检测输出。
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