fpga八选一多路选择器异或

以下是FPGA实现八选一多路选择器异或的代码和测试台代码：

module mux8to1_xor(
    input [7:0] data_in,
    input [2:0] sel,
    output reg out
);

always @(*) begin
    case(sel)
        3'b000: out = data_in[0];
        3'b001: out = data_in[1];
        3'b010: out = data_in[2];
        3'b011: out = data_in[3];
        3'b100: out = data_in[4];
        3'b101: out = data_in[5];
        3'b110: out = data_in[6];
        3'b111: out = data_in[7];
    endcase
end

always @(posedge clk) begin
    if(reset) begin
        out <= 1'b0;
    end else begin
        out <= out ^ data_in[sel];
    end
end

endmodule

测试台代码：

module mux8to1_xor_tb;

reg [7:0] data_in;
reg [2:0] sel;
wire out;

mux8to1_xor mux8to1_xor(
    .data_in(data_in),
    .sel(sel),
    .out(out)
);

initial begin
    data_in = 8'b00000000;
    sel = 3'b000;
    #10;
    sel = 3'b001;
    #10;
    sel = 3'b010;
    #10;
    sel = 3'b011;
    #10;
    sel = 3'b100;
    #10;
    sel = 3'b101;
    #10;
    sel = 3'b110;
    #10;
    sel = 3'b111;
    #10;
    $stop;
end

endmodule