[Tinyos-help] Precise contents and length of the 802.15.4 frames (and most especially with the TestNetwork App)

[roberto pagliari]

I apologize for the first message, actually the code, at least in
1.0.7version for micaz, send the effective payload of your mesage. In
CC2420RadioM there's something like (in Send.send)

      pMsg->length = pMsg->length + MSG_HEADER_SIZE + MSG_FOOTER_SIZE;

hence, pMsg->length is the effective size of your payload, excluding headers
and footers. Then,

      // FCS bytes generated by CC2420
      txlength = pMsg->length - MSG_FOOTER_SIZE;

and

  task void startSend() {
    if (!(call HPLChipcon.cmd(CC2420_SFLUSHTX))) {
      sendFailed();
      return;
    }
    if (!(call HPLChipconFIFO.writeTXFIFO(txlength+1,(uint8_t*)txbufptr))) {
      sendFailed();
      return;
    }
  }

which means that just the first txlength+1 bytes of the tOS_Msg are sent
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