From: mmaroti <mmaroti>
Date: Sun, 21 Mar 2010 23:58:07 +0000 (+0000)
Subject: document sloppy HW ACK timestamping
X-Git-Url: https://oss.titaniummirror.com/gitweb/?p=tinyos-2.x.git;a=commitdiff_plain;h=b43467ac35ec7089499aa7a598e1cbc8b6866230

document sloppy HW ACK timestamping
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---

diff --git a/tos/chips/rf2xx/rf230/README b/tos/chips/rf2xx/rf230/README
index cb4e9d94..e73a7611 100644
--- a/tos/chips/rf2xx/rf230/README
+++ b/tos/chips/rf2xx/rf230/README
@@ -54,3 +54,9 @@ and address recognition. In particular, you will not be able to snoop on
 onther messages. The load on the CPU is reduced, you should be able to send
 more messages under heavy load. Note, that the PacketRSSI interface will
 return the energy level (and not the rssi value) of received packet.
+
+RF230_HWACK_SLOPPY_TIMESTAMP
+
+If you define this, then the code that calculates the time stamp of the SFD
+from a single interrupt at the end of the message reception will not use
+floating point computation, which will be faster but less precise.