t_fifo_clock_domain_synch.v

同步及异步时序电路fifo源程序及其测试程序.rar - fifo源程序

module t_FIFO_Clock_Domain_Synch();
    parameter stack_width=32;
    parameter stack_height=8;
    parameter stack_ptr_width=3;
    defparam M1.stack_width=32;
    defparam M1.stack_height=8;
    defparam M1.stack_ptr_width=3;
    
    wire [stack_width-1:0] Data_out,Data_32_bit;
    wire                   stack_full,stack_almost_full,stack_half_full;
    wire                   stack_almost_empty,stack_empty;
    wire                   write;
    reg                    read_from_stack;
    reg                    Data_in;
    reg                    En;
    reg                    clk_read,clk_write,rst;
    wire [31:0]            stack0,stack1,stack2,stack3;
    wire [31:0]            stack4,stack5,stack6,stack7;

     //Probes of the stack
    assign stack0=M1.stack[0];
    assign stack1=M1.stack[1];
    assign stack2=M1.stack[2];
    assign stack3=M1.stack[3];
    assign stack4=M1.stack[4];
    assign stack5=M1.stack[5];
    assign stack6=M1.stack[6];
    assign stack7=M1.stack[7];
    
    //2-stage pipeline to compensate for latency at synchronizer
    reg[stack_width-1:0] Data_1,Data_2;
    always @(negedge clk_read)
    if(rst)begin Data_2<=0;Data_1<=0;end
    else begin Data_1=Data_32_bit;Data_2=Data_1;end

  
    Ser_Par_Conv_32 M00(Data_32_bit,write,Data_in,En,clk_write,rst);
    write_synchronizer M0(write_synch,write,clk_read,rst);
    FIFO_Buffer M1(Data_out,stack_full,stack_almost_full,stack_half_full,
      stack_almost_empty,stack_empty,Data_2,write_synch,read_from_stack,
      clk_read,rst);
 
       
    initial #10000 $finish;
    initial fork rst=1;#8 rst=0;join
    initial begin clk_write=0;forever #4 clk_write=~clk_write;end //100MHZ
    initial begin clk_read=0; forever #3 clk_read=~clk_read;end// 133MHz clock
    initial fork #1 En=0;#48 En=1;#2534 En=0;#3944 En=1;join       
    initial fork
     #6 read_from_stack=0;
     #2700 read_from_stack=1;#2706 read_from_stack=0;
     #3980 read_from_stack=1;#3986 read_from_stack=0;
     #6000 read_from_stack=1;#6006 read_from_stack=0;
     #7776 read_from_stack=1;#7782 read_from_stack=0; //Overlaps write_synch
    join

   
    //Serial data transitions are synchronized to the falling edge of clk_write
    initial begin//Generate data and hold
     #1 Data_in=0;
     @(posedge En) Data_in=1; //wait for enable
     @(posedge write)
     repeat(6) begin
     repeat(16)@(negedge clk_write)Data_in=0; 
     repeat(16)@(negedge clk_write)Data_in=1; 
     repeat(16)@(negedge clk_write)Data_in=1; 
     repeat(16)@(negedge clk_write)Data_in=0;  
     end
   end    
   
   initial
   //$monitor($time,"state=%b,next_state=%b,En=%b,write=%b,shift=%b,incr=%b",
   //             M00.state,M00.next_state,En,M00.write,M00.shift,M00.incr);
   //$monitor($time,"Data_in=%b,Data_out=%b",Data_in,Data_32_bit);
   //$monitor($time,"stackfull=%b,Data_Input=%b,write_synch=%b,Data_2=%b",stack_full,Data_32_bit,write_synch,stack0);
   $monitor($time,"stack0=%h,stack1=%h,stack2=%h,stack3=%h,Data_out=%h",stack0,stack1,stack2,stack3,Data_out);
endmodule