From 9cc4bc7a92f1be757774e091df4e6afb14d63dba Mon Sep 17 00:00:00 2001
From: joxe <joxe@23d1a52b-0c3c-0410-b72d-8f29ab48fe35>
Date: Fri, 17 Dec 2010 10:26:09 +0000
Subject: [PATCH] fixed crc calculation to be done when sending last byte -
 patch by A.Dunkels

git-svn-id: https://mspsim.svn.sourceforge.net/svnroot/mspsim/mspsim@767 23d1a52b-0c3c-0410-b72d-8f29ab48fe35
---
 se/sics/mspsim/chip/CC2420.java | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/se/sics/mspsim/chip/CC2420.java b/se/sics/mspsim/chip/CC2420.java
index 2c4299a..15108d0 100644
--- a/se/sics/mspsim/chip/CC2420.java
+++ b/se/sics/mspsim/chip/CC2420.java
@@ -990,9 +990,9 @@ public class CC2420 extends Chip implements USARTListener, RFListener, RFSource
 
   private void txNext() {
     if(txfifoPos <= memory[RAM_TXFIFO]) {
-      if (txfifoPos == 0) {
+      int len = memory[RAM_TXFIFO] & 0xff;
+      if (txfifoPos == len - 1) {
           txCrc.setCRC(0);
-          int len = memory[RAM_TXFIFO] & 0xff;
           for (int i = 1; i < len - 1; i++) {
             txCrc.addBitrev(memory[RAM_TXFIFO + i] & 0xff);
           }