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updated cc2420 converter to 6 byte xmac headers

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This commit is contained in:
fros4943 2009-05-26 13:33:35 +00:00
parent cd00bd3fdc
commit a8e66853bc
1 changed files with 12 additions and 7 deletions
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19
tools/cooja/apps/mspsim/src/se/sics/cooja/mspmote/interfaces/CC2420RadioPacketConverter.java
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@ -26,7 +26,7 @@
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $Id: CC2420RadioPacketConverter.java,v 1.9 2009/05/06 12:59:12 fros4943 Exp $
* $Id: CC2420RadioPacketConverter.java,v 1.10 2009/05/26 13:33:35 fros4943 Exp $
*/
package se.sics.cooja.mspmote.interfaces;
@ -35,6 +35,7 @@ import org.apache.log4j.Logger;
import se.sics.cooja.ConvertedRadioPacket;
import se.sics.cooja.RadioPacket;
import se.sics.cooja.util.StringUtils;
/**
* Converts radio packets between X-MAC/CC24240/Sky and COOJA.
@ -48,7 +49,7 @@ public class CC2420RadioPacketConverter {
public static final boolean WITH_PREAMBLE = true;
public static final boolean WITH_SYNCH = true;
public static final boolean WITH_XMAC = true;
public static final boolean WITH_CHECKSUM = true;
public static final boolean WITH_CHECKSUM = false;
public static final boolean WITH_TIMESTAMP = true;
public static final boolean WITH_FOOTER = true;
@ -75,7 +76,7 @@ public class CC2420RadioPacketConverter {
/* 1 byte length */
len = (byte) packetData.length;
if (WITH_XMAC) {
len += 4;
len += 6;
}
if (WITH_CHECKSUM) {
len += 2;
@ -90,12 +91,16 @@ public class CC2420RadioPacketConverter {
/* (TODO) 4 byte X-MAC */
if (WITH_XMAC) {
cc2420Data[pos++] = 0;
cc2420Data[pos++] = 1; /* TYPE_DATA */
accumulatedCRC = CRCCoder.crc16Add((byte)0, accumulatedCRC);
cc2420Data[pos++] = 0;
accumulatedCRC = CRCCoder.crc16Add((byte)0, accumulatedCRC);
cc2420Data[pos++] = 0; /* XXX sender: 0.0 */
accumulatedCRC = CRCCoder.crc16Add((byte)0, accumulatedCRC);
cc2420Data[pos++] = 0;
accumulatedCRC = CRCCoder.crc16Add((byte)0, accumulatedCRC);
cc2420Data[pos++] = 0; /* XXX receiver: 0.0 */
accumulatedCRC = CRCCoder.crc16Add((byte)0, accumulatedCRC);
cc2420Data[pos++] = 0;
accumulatedCRC = CRCCoder.crc16Add((byte)0, accumulatedCRC);
}
@ -157,8 +162,8 @@ public class CC2420RadioPacketConverter {
/* (IGNORED) 4 byte X-MAC */
if (WITH_XMAC) {
pos += 4;
len -= 4;
pos += 6;
len -= 6;
}
/* (IGNORED) 2 bytes checksum */
@ -182,7 +187,7 @@ public class CC2420RadioPacketConverter {
byte originalData[] = new byte[originalLen];
System.arraycopy(data, 6, originalData, 0, originalLen);
if (len < 0) {
logger.fatal("Negative length radio packet. Conversion failed.");
logger.warn("No cross-level conversion available: negative packet length");
return new ConvertedRadioPacket(new byte[0], originalData);
}
byte convertedData[] = new byte[len];