From 92862ad2a58a8b5f89d31857a33fb066c4a6501c Mon Sep 17 00:00:00 2001
From: adamdunkels <adamdunkels>
Date: Wed, 29 Apr 2009 11:38:50 +0000
Subject: [PATCH] Increased the number of iterations for ugly-hack-loop that
 checks if a transmission has started, to accommodate a faster CPU speed on
 the MSP430

---
 core/dev/cc2420.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/core/dev/cc2420.c b/core/dev/cc2420.c
index 2b16213ed..9844d7248 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 1.29 2009/03/12 21:58:20 adamdunkels Exp $
+ * @(#)$Id: cc2420.c,v 1.30 2009/04/29 11:38:50 adamdunkels Exp $
  */
 /*
  * This code is almost device independent and should be easy to port.
@@ -358,7 +358,7 @@ cc2420_send(const void *payload, unsigned short payload_len)
    * transmission starts.
    */
 #ifdef TMOTE_SKY
-#define LOOP_20_SYMBOLS 100	/* 326us (msp430 @ 2.4576MHz) */
+#define LOOP_20_SYMBOLS 400	/* 326us (msp430 @ 2.4576MHz) */
 #elif __AVR__
 #define LOOP_20_SYMBOLS 500	/* XXX */
 #endif
@@ -637,6 +637,11 @@ cc2420_read(void *buf, unsigned short bufsize)
   getrxdata(footer, FOOTER_LEN);
   
 #if CC2420_CONF_CHECKSUM
+  if(checksum != crc16_data(buf, len - AUX_LEN, 0)) {
+    PRINTF("checksum failed 0x%04x != 0x%04x\n",
+	   checksum, crc16_data(buf, len - AUX_LEN, 0));
+  }
+  
   if(footer[1] & FOOTER1_CRC_OK &&
      checksum == crc16_data(buf, len - AUX_LEN, 0)) {
 #else