pipeline_add_64.v

运用TLC5510A高速(20M),扫描出波形,测量相位差,两个TLC5510A测两个波形.

module pipeline_add_64(cout,sum,ina,inb,cin,clk);

//input or output defination
input[63:0] ina;
input[63:0] inb;
input cin;
input clk;
output[63:0] sum;
output  cout;


reg[63:0] tempa;       //input reg
reg[63:0] tempb;
reg[63:0] sum;         //output reg

reg[15:0] firsts;      //first step sum reg
reg[15:0] thirda;
reg[15:0] thirdb;      //third step data reg

reg[31:0] seconda;     //second step data reg 
reg[31:0] secondb;
reg[31:0] seconds;     //second step sum reg

reg[47:0] firsta;      //first step data reg
reg[47:0] firstb;      
reg[47:0] thirds;      //third step sum reg

reg tempci;            //reg for cin
reg firstco;           //reg for cout in first step
reg secondco;          //reg for cout in second step
reg thirdco;           //reg for cout in third step
reg cout;              //cout output reg 

always@(posedge clk)
  begin
    tempa<=ina;
    tempb<=inb;
    tempci<=cin;
  end    

always@(posedge clk)
  begin
    {firstco,firsts}<=tempa[15:0]+tempb[15:0]+tempci;
    firsta<=tempa[63:16];
    firstb<=tempb[63:16];
  end 

always@(posedge clk)
  begin
    {secondco,seconds}<={firsta[15:0]+firstb[15:0]+firstco,firsts};
    seconda<=firsta[47:16];
    secondb<=firstb[47:16];
  end

always@(posedge clk)
  begin
    {thirdco,thirds}<={seconda[15:0]+secondb[15:0]+secondco,seconds};
    thirda<=seconda[31:16];
    thirdb<=secondb[31:16];
  end

always@(posedge clk)
  begin
    {cout,sum}<={thirda[15:0]+thirdb[15:0]+thirdco,thirds};
  end

endmodule