From 826c353a778240edb6b7e134f967c1c9611b2062 Mon Sep 17 00:00:00 2001
From: mmaroti <mmaroti>
Date: Mon, 3 May 2010 15:20:49 +0000
Subject: [PATCH 1/1] allow the change of the backoff values through a define

---
 tos/chips/rf2xx/rf230/RF230RadioP.nc | 18 +++++++++++++++---
 1 file changed, 15 insertions(+), 3 deletions(-)

diff --git a/tos/chips/rf2xx/rf230/RF230RadioP.nc b/tos/chips/rf2xx/rf230/RF230RadioP.nc
index 2a259f08..6110f244 100644
--- a/tos/chips/rf2xx/rf230/RF230RadioP.nc
+++ b/tos/chips/rf2xx/rf230/RF230RadioP.nc
@@ -248,19 +248,31 @@ implementation
 
 #ifndef LOW_POWER_LISTENING
 
+#ifndef RF230_BACKOFF_MIN
+#define RF230_BACKOFF_MIN 320
+#endif
+
 	async command uint16_t RandomCollisionConfig.getMinimumBackoff()
 	{
-		return (uint16_t)(320 * RADIO_ALARM_MICROSEC);
+		return (uint16_t)(RF230_BACKOFF_MIN * RADIO_ALARM_MICROSEC);
 	}
 
+#ifndef RF230_BACKOFF_INIT
+#define RF230_BACKOFF_INIT 4960		// instead of 9920
+#endif
+
 	async command uint16_t RandomCollisionConfig.getInitialBackoff(message_t* msg)
 	{
-		return (uint16_t)(9920 * RADIO_ALARM_MICROSEC);
+		return (uint16_t)(RF230_BACKOFF_INIT * RADIO_ALARM_MICROSEC);
 	}
 
+#ifndef RF230_BACKOFF_CONG
+#define RF230_BACKOFF_CONG 2240
+#endif
+
 	async command uint16_t RandomCollisionConfig.getCongestionBackoff(message_t* msg)
 	{
-		return (uint16_t)(2240 * RADIO_ALARM_MICROSEC);
+		return (uint16_t)(RF230_BACKOFF_CONG * RADIO_ALARM_MICROSEC);
 	}
 
 #endif
-- 
2.39.2