[Commit-gnuradio] r10749 - gnuradio/trunk/usrp2/fpga/simple_gemac

[matt]

Author: matt
Date: 2009-04-02 17:30:31 -0600 (Thu, 02 Apr 2009)
New Revision: 10749

Modified:
   gnuradio/trunk/usrp2/fpga/simple_gemac/eth_tasks.v
Log:
simulate a hiccup in the filling of the fifo.  If long enough, will cause a tx 
underrun.


Modified: gnuradio/trunk/usrp2/fpga/simple_gemac/eth_tasks.v
===================================================================
--- gnuradio/trunk/usrp2/fpga/simple_gemac/eth_tasks.v  2009-04-02 21:30:48 UTC 
(rev 10748)
+++ gnuradio/trunk/usrp2/fpga/simple_gemac/eth_tasks.v  2009-04-02 23:30:31 UTC 
(rev 10749)
@@ -107,8 +107,21 @@
    end
 endtask // SendPacketFromFile
 
+task Waiter;
+   input [31:0] wait_length;
+   begin
+      tx_ll_src_rdy2 <= 0;
+      repeat(wait_length)
+       @(posedge clk);
+      tx_ll_src_rdy2 <= 1;
+   end
+endtask // Waiter
+
 task SendPacketFromFile_ll8;
    input [31:0] data_len;
+   input [31:0] wait_length;
+   input [31:0] wait_time;
+   
    integer count;
    begin
       $display("Sending Packet From File to LL8 Len=%d, %d",data_len,$time);
@@ -129,6 +142,8 @@
           tx_ll_data2 <= pkt_rom[i];
           tx_ll_sof2  <= 0;
           @(posedge clk);
+          if(i==wait_time)
+            Waiter(wait_length);
        end
       
       while(~tx_ll_dst_rdy2)