HotCRC CRC64R_D800000000000000_0000000000000000_0000000000000000 FPGA模块 HotPower@163.com（菜农独创）

/*-----------------------------------------------------------------------------------------------

      HotCRC CRC64R_D800000000000000_0000000000000000_0000000000000000 FPGA模块 HotPower[url=home.php?mod=space&uid=516618]@163.com[/url] 2023-09-21 12:10:15

-----------------------------------------------------------------------------------------------*/

module CRC64R_D800000000000000(clk, rst, data, outcrc64)

input clk, rst;

input [7:0] data;

output reg[63:0] outcrc64;

reg [63:0] crc64;



task CRC64R_D800000000000000;

inout[63:0] crc64;

input[7:0] indata;

    crc64 = crc64[63:8] ^ CRC64R_D800000000000000_Table(crc64[7:0] ^ indata);

endtask



function [63:0] CRC64R_D800000000000000_Table;

    input [7:0] data;

    CRC64R_D800000000000000_Table = CRC64R_D800000000000000_Table0(data[1:0]) ^ CRC64R_D800000000000000_Table1(data[3:2]) ^ CRC64R_D800000000000000_Table2(data[5:4]) ^ CRC64R_D800000000000000_Table3(data[7:6]);

endfunction



function [63:0] CRC64R_D800000000000000_Table0;

    input[1:0] data;

    case(data)

        2'b00: CRC64R_D800000000000000_Table0 = 64'h0000000000000000; 2'b01: CRC64R_D800000000000000_Table0 = 64'h01B0000000000000; 2'b10: CRC64R_D800000000000000_Table0 = 64'h0360000000000000; 2'b11: CRC64R_D800000000000000_Table0 = 64'h02D0000000000000;

        default: CRC64R_D800000000000000_Table0 = 64'h0000_0000_0000_0000_0000_0000_0000_0000;

    endcase

endfunction



function [63:0] CRC64R_D800000000000000_Table1;

    input[1:0] data;

    case(data)

        2'b00: CRC64R_D800000000000000_Table1 = 64'h0000000000000000; 2'b01: CRC64R_D800000000000000_Table1 = 64'h06C0000000000000; 2'b10: CRC64R_D800000000000000_Table1 = 64'h0D80000000000000; 2'b11: CRC64R_D800000000000000_Table1 = 64'h0B40000000000000;

        default: CRC64R_D800000000000000_Table1 = 64'h0000_0000_0000_0000_0000_0000_0000_0000;

    endcase

endfunction



function [63:0] CRC64R_D800000000000000_Table2;

    input[1:0] data;

    case(data)

        2'b00: CRC64R_D800000000000000_Table2 = 64'h0000000000000000; 2'b01: CRC64R_D800000000000000_Table2 = 64'h1B00000000000000; 2'b10: CRC64R_D800000000000000_Table2 = 64'h3600000000000000; 2'b11: CRC64R_D800000000000000_Table2 = 64'h2D00000000000000;

        default: CRC64R_D800000000000000_Table2 = 64'h0000_0000_0000_0000_0000_0000_0000_0000;

    endcase

endfunction



function [63:0] CRC64R_D800000000000000_Table3;

    input[1:0] data;

    case(data)

        2'b00: CRC64R_D800000000000000_Table3 = 64'h0000000000000000; 2'b01: CRC64R_D800000000000000_Table3 = 64'h6C00000000000000; 2'b10: CRC64R_D800000000000000_Table3 = 64'hD800000000000000; 2'b11: CRC64R_D800000000000000_Table3 = 64'hB400000000000000;

        default: CRC64R_D800000000000000_Table3 = 64'h0000_0000_0000_0000_0000_0000_0000_0000;

    endcase

endfunction





always [url=home.php?mod=space&uid=72445]@[/url] (posedge clk or negedge rst)

begin

    if (!rst)

    begin

        crc64 <= 64'h0000000000000000;

    end

    else

    begin

        CRC64R_D800000000000000(crc64, data);

        outcrc64 <= crc64;

        crc64 <= crc64;

    end

end

endmodule