From e7d7e31bc963809bc1a9599e583e7dcf6ff9423d Mon Sep 17 00:00:00 2001
From: bg- <bg->
Date: Mon, 30 Apr 2007 09:41:42 +0000
Subject: [PATCH] * Better management of "DATA ACK"s.

---
 core/dev/cc2420.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/core/dev/cc2420.c b/core/dev/cc2420.c
index 14d158acc..e6ede814a 100644
--- a/core/dev/cc2420.c
+++ b/core/dev/cc2420.c
@@ -28,7 +28,7 @@
  *
  * This file is part of the Contiki operating system.
  *
- * @(#)$Id: cc2420.c,v 1.11 2007/04/04 11:46:10 bg- Exp $
+ * @(#)$Id: cc2420.c,v 1.12 2007/04/30 09:41:42 bg- Exp $
  */
 /*
  * This code is almost device independent and should be easy to port.
@@ -447,7 +447,8 @@ PROCESS_THREAD(cc2420_process, ev, data)
 	u8_t footer[2];
 	uip_len = 0;
 	s = splhigh();
-	FASTSPI_READ_FIFO_NO_WAIT(&uip_buf[UIP_LLH_LEN], len - 2);
+	if (len > 2)
+	  FASTSPI_READ_FIFO_NO_WAIT(&uip_buf[UIP_LLH_LEN], len - 2);
 	FASTSPI_READ_FIFO_NO_WAIT(footer, 2);
 	rx_fifo_remaining_bytes = 0; /* RX FIFO emptied! */
 	splx(s);
@@ -460,6 +461,9 @@ PROCESS_THREAD(cc2420_process, ev, data)
       }
     }
 
+    if (len == 2)
+      PRINTF("recv data_ack\n");
+
     /* Clean up in case of FIFO overflow!  This happens for every full
      * length frame and is signaled by FIFOP = 1 and FIFO = 0.
      */