From 2449348f3142dee508d236ff773a04559a25d047 Mon Sep 17 00:00:00 2001
From: Sebastien Bourdeauducq <sb@m-labs.hk>
Date: Tue, 14 Oct 2014 12:47:24 +0800
Subject: [PATCH] devices/runtime: allow 1ms for all initial DDS programming

---
 artiq/devices/runtime.py | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/artiq/devices/runtime.py b/artiq/devices/runtime.py
index d9bac42ce..76e192e67 100644
--- a/artiq/devices/runtime.py
+++ b/artiq/devices/runtime.py
@@ -1,4 +1,5 @@
 import os
+from fractions import Fraction
 
 from llvm import core as lc
 from llvm import target as lt
@@ -138,7 +139,8 @@ def _debug_dump_obj(obj):
 class Environment(LinkInterface):
     def __init__(self, ref_period):
         self.ref_period = ref_period
-        self.initial_time = 4000
+        # allow 1ms for all initial DDS programming
+        self.initial_time = int(Fraction(1, 1000)/self.ref_period)
 
     def emit_object(self):
         tm = lt.TargetMachine.new(triple="or1k", cpu="generic")