signal.v

i2c硬件程序,字节读、字节写

`timescale 1ns/1ns
`define timeslice 200
module Signal(RESET,CLK,RD,WR,ADDR,ACK,DATA);
    output RESET;
    output CLK;
    output RD,WR;
    output[10:0]ADDR;
    input ACK;
    inout [7:0]DATA;
    reg RESET;
    reg CLK;
    reg RD,WR;
    reg W_R;
    reg [10:0] ADDR;
    reg [7:0]data_to_eeprom;
    reg [10:0]addr_mem[0:255];
    reg [7:0] data_mem[0:255];
    reg [7:0] ROM[1:2048];
    integer i,j;
    integer OUTFILE;
    assign DATA=(W_R)?8'bz:data_to_eeprom;
    
    
    //-----------------------
    always#(`timeslice/2)
      CLK=~CLK;
    //-----------------------
    initial
    begin
        RESET=1;
        i=0;
        j=0;
        W_R=0;
        CLK=0;
        RD=0;
        WR=0;
        #1000;
        RESET=0;
        repeat(16)
        begin
            #(5*`timeslice);
            WR=1;
            #(`timeslice);
            WR=0;
            @(posedge ACK);
        end
        #(10*`timeslice);
        W_R=1;
        repeat(16)
        begin
            #(5*`timeslice);
            RD=1;
            #(`timeslice);
            RD=0;
            @(posedge ACK);
        end
    end
    //------------------------------
    initial
    begin
        $display("writing-----writing-----writing-----writing");
        #(2*`timeslice);
        for(i=0;i<=16;i=i+1)
        begin
            ADDR=addr_mem[i];
            data_to_eeprom=data_mem[i];
            $fdisplay(OUTFILE,"@%0h %0h",ADDR,data_to_eeprom);
            @(posedge ACK);
        end
    end
    //----------------------------------------
    initial
    @(posedge W_R)
    begin
        ADDR=addr_mem[0];
        $fclose(OUTFILE);
        $readmemh("./eeprom.dat",ROM);
        $display("Begin READING----READING----READING----READING");
        for(j=0;j<=16;j=j+1)
        begin
            ADDR=addr_mem[j];
            @(posedge ACK);
            if(DATA==ROM[ADDR])
            $display("DATA%0h==ROM[%0h]---READ RIGHT",DATA,ADDR);
            else
            $display("DATA%0h!==ROM[%0h]---READ WRONG",DATA,ADDR);
        end
    end
    initial
    begin
        OUTFILE=$fopen("./eeprom.dat");
        $readmemh("./addr.dat",addr_mem);
        $readmemh("./data.dat",data_mem);
end
endmodule