we now inhibit our own sending when a received pause frame comes. _rx.v is currently only a skeleton for testing pause

git-svn-id: http://gnuradio.org/svn/gnuradio/trunk@10721 221aa14e-8319-0410-a670-987f0aec2ac5

1 files changed, 7 insertions, 4 deletions

diff --git a/usrp2/fpga/simple_gemac/flow_ctrl_tx.v b/usrp2/fpga/simple_gemac/flow_ctrl_tx.v
index 9f7556de4..f80f5a76d 100644
--- a/usrp2/fpga/simple_gemac/flow_ctrl_tx.v
+++ b/usrp2/fpga/simple_gemac/flow_ctrl_tx.v
@@ -11,13 +11,16 @@ module flow_ctrl_tx
    input        pause_quanta_val,

    // MAC_tx_ctrl

    output       pause_apply,

-   input        pause_quanta_sub);

+   input        paused);

      

    // ******************************************************************************        

    // Inhibit our TX from transmitting because they sent us a PAUSE frame

    // ******************************************************************************

 

-   reg [15:0] 	pause_quanta_counter;

+   // Pauses are in units of 512 bit times, or 64 bytes/clock cycles, and can be

+   //   as big as 16 bits, so 22 bits are needed for the counter

+   

+   reg [15+6:0] pause_quanta_counter;

    reg 		pqval_d1, pqval_d2;		

 

    always @(posedge tx_clk) pqval_d1 <= pause_quanta_val;

@@ -27,8 +30,8 @@ module flow_ctrl_tx
      if (rst)

        pause_quanta_counter <= 0;

      else if (pqval_d1 & ~pqval_d2)

-       pause_quanta_counter <= pause_quanta; 

-     else if((pause_quanta_counter!=0) & pause_quanta_sub)

+       pause_quanta_counter <= {pause_quanta, 6'b0}; 

+     else if((pause_quanta_counter!=0) & paused)

        pause_quanta_counter <= pause_quanta_counter - 1;

 

    assign	pause_apply = tx_pause_en & (pause_quanta_counter != 0);