From 1d42a9f3b19b5a506bf1b16cc5079ddf6f842213 Mon Sep 17 00:00:00 2001 From: matt Date: Tue, 31 Mar 2009 18:03:20 +0000 Subject: 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 --- simple_gemac/flow_ctrl_tx.v | 11 +++++++---- 1 file changed, 7 insertions(+), 4 deletions(-) (limited to 'simple_gemac/flow_ctrl_tx.v') diff --git a/simple_gemac/flow_ctrl_tx.v b/simple_gemac/flow_ctrl_tx.v index 9f7556de4..f80f5a76d 100644 --- a/simple_gemac/flow_ctrl_tx.v +++ b/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); -- cgit v1.2.3