From ae7580f47b07f8f9ef0f502c34801ff565cf1dbc Mon Sep 17 00:00:00 2001
From: Leon Hiemstra <hiemstra@astron.nl>
Date: Wed, 9 Mar 2016 12:25:01 +0000
Subject: [PATCH] increased the fifo size
---
libraries/io/eth/src/vhdl/eth_buffer.vhd | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/libraries/io/eth/src/vhdl/eth_buffer.vhd b/libraries/io/eth/src/vhdl/eth_buffer.vhd
index d04b92c5da..2a0772c45f 100644
--- a/libraries/io/eth/src/vhdl/eth_buffer.vhd
+++ b/libraries/io/eth/src/vhdl/eth_buffer.vhd
@@ -58,9 +58,9 @@ END eth_buffer;
ARCHITECTURE str OF eth_buffer IS
- CONSTANT c_nof_frames : NATURAL := 2; -- support at least 2 max size frames in the FIFO
+ CONSTANT c_nof_frames : NATURAL := 4; -- support at least 2 max size frames in the FIFO
CONSTANT c_fifo_nof_words : NATURAL := 2**(ceil_log2(c_nof_frames * c_eth_frame_nof_words)); -- = 1024 > 2*380
- CONSTANT c_fifo_almost_full : NATURAL := c_fifo_nof_words-64; -- use sufficient margin to account for latencies
+ CONSTANT c_fifo_almost_full : NATURAL := c_fifo_nof_words-380-20; -- use sufficient margin to account for 1 packet (1520 bytes) + 20 latency
TYPE t_state_enum IS (
s_idle,
--
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