testhdlc.v

hdlc帧接收器 包含文件： 设计代码 测试代码 综合脚步 说明文档

/////////////////////////////////////////////////
//If you have any question about this testbench
//please get in touch with me:  [e-mail]
//
//
//
/////////////////////////////////////////////////
`timescale 1ns/1ns
module testHDLC;
reg RXD,RXCLK,RESET;
wire TXCLK;
wire[7:0] TXD;
wire[2:0] TXDS;

reg isfix;
reg[7:0] bytedate;
reg[2:0] bytekind;
reg iswrong;
reg isinsert;

integer RXDOUT;
integer insertnum;
integer bittest;
integer bitstream;
integer bytecount;
integer framecount;
integer TXD_REF_int;
integer TXDS_REF_int;
integer seednum;

reg[7:0] TXD_REF;
reg[2:0] TXDS_REF;


hdlc_recv instance(RXD,RXCLK,RESET,TXD,TXCLK,TXDS);
//HDLC instance(RXD,RXCLK,RESET,TXD,TXCLK,TXDS);

always #10 RXCLK=!RXCLK;

initial
   begin
      RESET=1; RXCLK=0; RXD=1;
      isfix=0; bytedate=0; bytekind=0;
      iswrong=0; bitstream=0; bytecount=0; framecount=0; isinsert=1;
      TXD_REF=0; TXDS_REF=0;
      
      $hello;
      #20 RESET=0;
      #20 RESET=1;
          seednum=21; $seed(seednum);

      #70 task_flag_gen; framecount=framecount+1;   //framecount=1;
         
          isfix=1; bytedate=8'h23; bytekind=3'b110; task_byte_fix; task_byte_gen; //1-5
	  isfix=1; bytedate=8'h67; bytekind=3'b101; task_byte_fix; task_byte_gen; 
	  isfix=0; bytedate=8'h00; bytekind=3'b100; task_byte_fix; task_byte_gen;
	  isfix=1; bytedate=8'h8F; bytekind=3'b100; task_byte_fix; task_byte_gen;
	  isfix=1; bytedate=8'hFE; bytekind=3'b100; task_byte_fix; task_byte_gen;
	  isfix=1; bytedate=8'h7F; bytekind=3'b100; task_byte_fix; task_byte_gen; //6-10
	  isfix=0; bytedate=8'h00; bytekind=3'b100; task_byte_fix; task_byte_gen;
	  isfix=1; bytedate=8'hC3; bytekind=3'b100; task_byte_fix; task_byte_gen;
	  isfix=1; bytedate=8'hE7; bytekind=3'b100; task_byte_fix; task_byte_gen;
	  isfix=1; bytedate=8'h10; bytekind=3'b100; task_byte_fix; task_byte_gen;
	  isfix=1; bytedate=8'h3F; bytekind=3'b011; task_byte_fix; task_byte_gen; //11-15
	  
//          task_flag_gen;
//          insertnum=11; task_ones_insert;
          task_flag_gen; framecount=framecount+1;   //framecount=2;

	  isfix=0; bytedate=8'h00; bytekind=3'b110; task_byte_fix; task_byte_gen; //1-5
	  isfix=1; bytedate=8'h03; bytekind=3'b101; task_byte_fix; task_byte_gen;
	  isfix=1; bytedate=8'hF2; bytekind=3'b010; task_byte_fix; task_byte_gen;

	  task_flag_gen;
	  task_flag_gen;
	  task_flag_gen;
//	  insertnum=2; task_ones_insert;
	  task_flag_gen; framecount=framecount+1;   //framecount=3;
	  
	  isfix=1; bytedate=8'h45; bytekind=3'b010; task_byte_fix; task_byte_gen; //1-5

	  task_flag_gen;
	  insertnum=0; task_ones_insert;
	  task_flag_gen; framecount=framecount+1;   //framecount=4;

	  isfix=0; bytedate=8'h00; bytekind=3'b110; task_byte_fix; task_byte_gen; //1-5
	  isfix=1; bytedate=8'h7E; bytekind=3'b101; task_byte_fix; task_byte_gen;
	  isfix=1; bytedate=8'hF7; bytekind=3'b100; task_byte_fix; task_byte_gen;
	  isfix=1; bytedate=8'h7E; bytekind=3'b011; task_byte_fix; task_byte_gen;
	  
	  task_flag_gen;
	  insertnum=21; task_ones_insert;
	  task_flag_gen; framecount=framecount+1;   //framecount=5;
	  
	  isfix=1; bytedate=8'h37; bytekind=3'b110; task_byte_fix; task_byte_gen; //1-5
	  isfix=0; bytedate=8'h00; bytekind=3'b101; task_byte_fix; task_byte_gen;
	  repeat(61)    
	    begin
		isfix=0; bytedate=8'h00; bytekind=3'b100; task_byte_fix; task_byte_gen; //3-63
	    end 
	  isfix=1; bytedate=8'h1F; bytekind=3'b011; task_byte_fix; task_byte_gen; //64
	  
	  task_flag_gen;
          insertnum=5; task_ones_insert;
	  task_flag_gen; framecount=framecount+1;   //framecount=6;

	  isfix=1; bytedate=8'h37; bytekind=3'b110; task_byte_fix; task_byte_gen; //1-5
	  isfix=0; bytedate=8'h00; bytekind=3'b101; task_byte_fix; task_byte_gen;
	  repeat(62)
	    begin
                isfix=0; bytedate=8'h00; bytekind=3'b100; task_byte_fix; task_byte_gen; //3-64
	    end
	  isfix=1; bytedate=8'h56; bytekind=3'b001; task_byte_fix; task_byte_gen; //65

	  task_flag_gen;
	  insertnum=3; task_ones_insert;
          task_flag_gen; framecount=framecount+1;   //framecount=7;

          isfix=0; bytedate=8'h00; bytekind=3'b110; task_byte_fix; task_byte_gen; //1-5
	  isfix=1; bytedate=8'h3E; bytekind=3'b010; task_byte_fix; task_byte_gen;

	  task_flag_gen;
          insertnum=20; task_ones_insert;
          task_flag_gen; framecount=framecount+1;   //framecount=8;

          isfix=1; bytedate=8'h54; bytekind=3'b110; task_byte_fix; task_byte_gen; //1-5
	  isfix=0; bytedate=8'h00; bytekind=3'b101; task_byte_fix; task_byte_gen;
	  repeat(125)
	    begin
		isfix=0; bytedate=8'h00; bytekind=3'b100; task_byte_fix; task_byte_gen; //3-127
	    end
	  isfix=1; bytedate=8'h5D; bytekind=3'b001; task_byte_fix; task_byte_gen; //128
	  	  
          task_flag_gen;
	  insertnum=7; task_ones_insert;
	  task_flag_gen; framecount=framecount+1;

          isinsert=0;                    //framecount=9;
	  isfix=1; bytedate=8'h37; bytekind=3'b110; task_byte_fix; task_byte_gen; //1-5
	  isfix=1; bytedate=8'h17; bytekind=3'b101; task_byte_fix; task_byte_gen;
	  isfix=1; bytedate=8'hEC; bytekind=3'b111; task_byte_fix; task_byte_gen;
	  isinsert=1;
	  isfix=1; bytedate=8'h32; bytekind=3'b111; task_byte_fix; task_byte_gen;
	  isfix=0; bytedate=8'h00; bytekind=3'b111; task_byte_fix; task_byte_gen;

	  task_flag_gen;
	  insertnum=2; task_ones_insert;
	  task_flag_gen; framecount=framecount+1;   //framecount=10;
	  
	  isfix=1; bytedate=8'h34; bytekind=3'b110; task_byte_fix; task_byte_gen; //1-5
	  isfix=1; bytedate=8'h5A; bytekind=3'b101; task_byte_fix; task_byte_gen;
	  isfix=0; bytedate=8'h00; bytekind=3'b100; task_byte_fix; task_byte_gen;
	  isfix=0; bytedate=8'h00; bytekind=3'b100; task_byte_fix; task_byte_gen;
	  isfix=0; bytedate=8'h00; bytekind=3'b100; task_byte_fix; task_byte_gen;
	  isfix=1; bytedate=8'hC6; bytekind=3'b011; task_byte_fix; task_byte_gen; //6-10

	  task_flag_gen;
	  insertnum=11; task_ones_insert;

          $finish;
   end

always @(posedge RXCLK)
    task_display_RXD;

always @(negedge TXCLK)
    begin
       $readresult(TXD_REF_int,TXDS_REF_int);
       TXD_REF=TXD_REF_int;
       TXDS_REF=TXDS_REF_int;
//       if(TXD==TXD_REF&&TXDS==TXDS_REF)
//	  $display("Current byte is OK\n");
//       else
//	  $display("Current byte is WRONG\n");
    end    
   

task task_flag_gen;
   begin
      bytecount=0;
      #1
      $display("------------------------\n");
      $display("\tnew flag\n");
      $display("------------------------\n");
      repeat(8)
         @(negedge RXCLK) begin $flag(RXDOUT); RXD=RXDOUT; end    
      #10;
   end
endtask

task task_ones_insert;
   begin
      #1
      $display("************************\n");
      $display("\tones_insert\n");
      $display("************************\n");
      repeat(insertnum)
         @(negedge RXCLK) RXD=1;
      if(insertnum)
        #10;
   end
endtask

task task_byte_fix;
   $fix(isfix,bytedate,bytekind);
endtask

task task_byte_gen;
   begin
      bytecount=bytecount+1;
      #1
      $display("^^^^^^^^^^^^^^^^^^^^^^^^\n"); 
      $display("\tnew byte   %0d-%0d\n",framecount,bytecount);
      $display("^^^^^^^^^^^^^^^^^^^^^^^^\n");
      while(bitstream<8)
          @(negedge RXCLK)
              begin
       	          $stuff(bittest);
		  if(isinsert&&bittest)
	             begin RXD=iswrong; $display("--the next bit is bitstuff--\n"); end
		  else
	             begin $byte(RXDOUT); RXD=RXDOUT; bitstream=bitstream+1; end
              end
      bitstream=0;
      #10;
   end
endtask

task task_display_RXD;
    $display("At time:  %0t\t\t",$time,"RXD=%b",RXD);
endtask


endmodule