[RTLLM-p050] Miscellaneous/Others/serial2parallel 的題解

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module serial2parallel(
    input clk,
    input rst_n,
    input din_serial,
    input din_valid,
    output reg [7:0]dout_parallel,
    output reg dout_valid
);

    reg[7:0]din_tmp;
    reg[3:0]cnt;

    always@(posedge clk or negedge rst_n)begin
        if(!rst_n)
            cnt <= 0;
        else if(din_valid)
            cnt <= (cnt == 4'd8)?0:cnt+1'b1;
        else    
            cnt <= 0;
    end

    always@(posedge clk or negedge rst_n)begin
        if(!rst_n)
            din_tmp <= 8'b0;
        else if(din_valid && cnt <= 4'd7)
            din_tmp <= {din_tmp[6:0],din_serial};

    end 

    always@(posedge clk or negedge rst_n)begin
        if(!rst_n)begin
            dout_valid <= 1'b0;
            dout_parallel <= 8'b0;
        end
        else if(cnt == 4'd8)begin
            dout_valid <= 1'b1;
            dout_parallel <= din_tmp;
        end
        else begin
            dout_valid <= 1'b0;
        end
    end 

endmodule

[RTLLM-p050] Miscellaneous/Others/serial2parallel 的題解

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