`ifndef ROUTER_INTERFACE_SV

`define ROUTER_INTERFACE_SV

interface  router_interface(input  logic  [0:0] clock);

   logic        reset_n;

   logic [15:0] din; 

   logic [15:0] frame_n; 

   logic [15:0] valid_n;

   logic [15:0] dout; 

   logic [15:0] valido_n;

   logic [15:0] busy_n; 

   logic [15:0] frameo_n;

   clocking cb @(posedge clock);

       output  din; 

       output  frame_n; 

       output  valid_n;

       output  reset_n;

       input dout; 

       input valido_n;

       input busy_n; 

       input frameo_n;

   endclocking  : cb

   modport  TB(clocking cb,  output reset_n);

endinterface  : router_interface

`endif  //ROUTER_INTERFACE_SV

* * *

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## 

例化变量要在显示之前【否则会报错】

* * *

`ifndef ROUTER_SEND_RECEIVE_CHECK_SV

`define ROUTER_SEND_RECEIVE_CHECK_SV

program  router_send_receive_check(router_interface router_inf_tb);

  task  send_addr(input  bit  [3:0] source_addr_i,input  bit[3:0] dest_addr_i);

   $display("send_addr,source_addr_i=0x%0h",source_addr_i,dest_addr_i);/*{{{*/

   for(int i=0; i<4  ; i++) begin

      @(router_inf_tb.cb);

      router_inf_tb.cb.din[source_addr_i]  <= dest_addr_i[i];

      router_inf_tb.cb.frame_n[source_addr_i]  <=  1'b0;

      router_inf_tb.cb.valid_n[source_addr_i]  <=  1'b0;

   end/*}}}*/

  endtask: send_addr

  task  send_pad(input  bit[3:0] source_addr_i);

   $display("send_pad, source_addr_i=0x%0h",source_addr_i);

   for(

     int i=0; i <  5; i++)  begin/*{{{*/

      @(router_inf_tb.cb);

      router_inf_tb.cb.din[source_addr_i]  <=  1;

      router_inf_tb.cb.frame_n[source_addr_i]  <=  1'b0;

      router_inf_tb.cb.valid_n[source_addr_i]  <=  1'b1;

   end/*}}}*/

  endtask: send_pad

  task  send_data(input  bit  [3:0] source_addr_i,  input  bit  [7:0] data_q_i[$])  ;

   $display("send_data,source_addr_i=0x%0h,data:%p",source_addr_i,data_q_i);

   foreach  (data_q_i[index])  begin   // byte :8bit

     for(int i =  0; i <  8; i++)  begin/*{{{*/

        @(router_inf_tb.cb);

        router_inf_tb.cb.din[source_addr_i]  <= data_q_i[index][i];

        router_inf_tb.cb.valid_n[source_addr_i]  <=  1'b0;

       if((index ==  (data_q_i.size()-1))  &&  (i ==  7))  begin   // last beat

          router_inf_tb.cb.frame_n[source_addr_i]  <=  1'b1;

       end  else  begin

          router_inf_tb.cb.frame_n[source_addr_i]  <=  1'b0;

       end/*}}}*/

     end

   end

    @(router_inf_tb.cb);

    router_inf_tb.cb.valid_n[source_addr_i]  <=  1'b1;

  endtask  : send_data

  task  send_data_8bit(input  bit  [3:0] source_addr_i,  input  bit  [7:0] data_i);

   $display("send_data, source_addr_i=0x%0h, data=0x%h", source_addr_i, data_i);

     for(int i =  0; i<8; i++)  begin

        @(router_inf_tb.cb);

        router_inf_tb.cb.din[source_addr_i]  <= data_i[i];

        router_inf_tb.cb.valid_n[source_addr_i]  <=  1'b0;

       if(i ==  7)  begin

          router_inf_tb.cb.frame_n[source_addr_i]  <=  1'b1;

       end  else  begin

          router_inf_tb.cb.frame_n[source_addr_i]  <=  1'b0;

       end

       end

  endtask: send_data_8bit

  task  gen_data(input  int send_data_num_i,output  bit[7:0] data_q_o[$]); // gen data

   bit[7:0] data;

   $display("gen_data,send_data_num=%0d",send_data_num_i);

   for(int i =  0; i< send_data_num_i ; i++)  begin

data =  $random(); //  $ urandom_range(100,200) 

      data_q_o.push_back(data);

   end

  endtask: gen_data

  task send (input  bit[3:0]source_addr_i,  input  bit[3:0] dest_addr_i,  input  int send_data_num_i,output  bit  [7:0] data_q_o[$]);

   // send addr

   send_addr(.source_addr_i(source_addr_i),  .dest_addr_i(dest_addr_i));

     // send pad

   send_pad(.source_addr_i(source_addr_i));

     // gen data

   gen_data(.send_data_num_i(send_data_num_i),  .data_q_o(data_q_o)); 

     // send data

   send_data(.source_addr_i(source_addr_i),.data_q_i(data_q_o)); 

  endtask:send

  task  reset();

   $display("interface_reset_test,reset enter....");

    router_inf_tb.reset_n <=  1'b0;

    router_inf_tb.cb.din <=  'h0;

    router_inf_tb.cb.frame_n <=  'h1;

    router_inf_tb.cb.valid_n <=  'h1;

   ##2 router_inf_tb.cb.reset_n <=  1'b1;

   repeat(15)  begin

      @(router_inf_tb.cb);

   end

  endtask  : reset

  task  receive(input  bit[3:0] dest_addr_i,  output  bit  [7:0] data_q_o[$]);

   bit  [7:0] data;

   bit  [2:0] i =  0;

   $display("receive,enter.....");

   forever  begin

         if(i==0)  begin

            data_q_o.push_back(data);

           $display("receive,data_q_o:%p",data_q_o); // %

      @(router_inf_tb.cb);

     if(router_inf_tb.cb.valido_n[dest_addr_i]  ==0)  begin

         if(router_inf_tb.cb.frameo_n[dest_addr_i]  ==0)  begin

            data[i]  = router_inf_tb.dout;

i = i +  1;

         end  else  if  (router_inf_tb.frameo_n[dest_addr_i]  ==  1  &&  (i ==  7))  begin

            data[i]  = router_inf_tb.dout;

i = i +  1;

         end  else  begin

           $display("error dut output frameo_n, i=%0d",i);

           $finish;

         end

         if(i==0)  begin

            data_q_o.push_back(data);

           $display("receive,data_q_o:%p",data_q_o); // %p print queue

         end 

     end

   end

  end

  endtask:receive

  task  check(input  bit[7:0] send_data_q_i[$],  input  bit  [7:0] receive_data_q_i[$]);

   bit  [7:0] actual_data;   /// send_data _q = 0x

   bit  [7:0] expect_data;

   // send data size ?= receive data size

   if(send_data_q_i.size()!= receive_data_q_i.size())  begin

     $display("data check error,send_data_q_i.size:%0d != receive_data_q_i.size: %0d",send_data_q_i.size(),receive_data_q_i.size())  ;

   end

   //

   //

   foreach(receive_data_q_i[i])  begin

actual_data = receive_data_q_i.pop_front();

expect_data = send_data_q_i.pop_front();

     if  (actual_data != expect_data)  begin

       $display("data check error, expect_data = 0x%0h, actual_data = 0x%0h",expect_data,actual_data);

     end  else  begin

       $display("data check right, expect_data = 0x%0h, actual_data = 0x%0h",expect_data,actual_data);

     end

   end 

  endtask:check

  initial  begin

     bit[3:0] source_addr =  0;

     bit[3:0] dest_addr =  3;

     int send_data_num =  2;

     bit  [7:0] send_data_q[$];

     bit  [7:0] receive_data_q[$];

   // reset

   reset();

     // send

   fork

     send(.source_addr_i(source_addr),.dest_addr_i(dest_addr),  .send_data_num_i(send_data_num),.data_q_o(send_data_q));

     //receive

     receive(.dest_addr_i(dest_addr),.data_q_o(receive_data_q)); // forever

   join_any

     //check

   check(.send_data_q_i(send_data_q),.receive_data_q_i(receive_data_q));

  end

endprogram: router_send_receive_check

`endif  //ROUTER_SEND_RECEIVE_CHECK_SV