From da6ab3236a75d9af1ef25338990eb02717cfc1ce Mon Sep 17 00:00:00 2001
From: purtschert_j <jonas.purtschert@psi.ch>
Date: Thu, 29 Nov 2018 14:07:45 +0100
Subject: [PATCH] added constrain template

---
 constraints/eevr.ucf | 6 ++++++
 1 file changed, 6 insertions(+)
 create mode 100644 constraints/eevr.ucf

diff --git a/constraints/eevr.ucf b/constraints/eevr.ucf
new file mode 100644
index 0000000..acf8c9d
--- /dev/null
+++ b/constraints/eevr.ucf
@@ -0,0 +1,6 @@
+# FIFO clock crossing for streaming interface:
+# constrain to have less delay than one clock cycle of the faster clock:
+
+set_max_delay -datapath_only -from <ClkA> -to <ClkB> <faster_clock_period>
+set_max_delay -datapath_only -from <ClkB> -to <ClkA> <faster_clock_period>
+