From b7ad1c0d9ab174c7452f3abeaf65d9185388e4a8 Mon Sep 17 00:00:00 2001
From: Erik Kooistra <kooistra@astron.nl>
Date: Mon, 5 Jan 2015 14:19:46 +0000
Subject: [PATCH] Added purpose and description.

---
 libraries/io/ddr/src/vhdl/io_ddr_driver.vhd | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/libraries/io/ddr/src/vhdl/io_ddr_driver.vhd b/libraries/io/ddr/src/vhdl/io_ddr_driver.vhd
index 562589e996..deaefa6096 100644
--- a/libraries/io/ddr/src/vhdl/io_ddr_driver.vhd
+++ b/libraries/io/ddr/src/vhdl/io_ddr_driver.vhd
@@ -20,6 +20,12 @@
 --
 --------------------------------------------------------------------------------
 
+-- Purpose: Provide streaming interface to DDR memory
+-- Description:
+--   Write or read a block of data to or from DDR memory. The block of data is
+--   located from dvr_start_addr to dvr_end_addr. The io_ddr_driver takes care
+--   that the access is done in a number of bursts.
+
 LIBRARY IEEE, tech_ddr_lib, common_lib, dp_lib;
 USE IEEE.STD_LOGIC_1164.ALL;
 USE IEEE.NUMERIC_STD.ALL;
-- 
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