CC2420 Recent Updates

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5/28/2007 : CC2420SpiC

  • Provided missing strobes and registers in CC2420SpiC:
    • SACKPEND
    • SRXDEC
    • STXCAL
    • STXENC
    • SAES
    • MAIN
    • SYNCWORD
    • RXCTRL0
    • SECCTRL0
    • SECCTRL1
    • BATTMON
    • MANFIDL
    • MANFIDH
    • MANAND
    • MANOR
    • AGCCTRL

3/15/2007 : RadioBackoff and Address Recognition

  • Removed hardware address recognition. This forces the radio to download every packet, which takes time. The time spent downloading a packet to non-destination nodes should improve acknowledgment success rate by decreasing collisions that occur when non-destination nodes are attempting to transmit a packet during an acknowledgment backoff. Further improvements can be made by setting an alarm in Receive to backoff for at least the ack wait period when the node receives a packet with the wrong address.
  • Parameterized the RadioBackoff interface at the top of the radio stack instead of in CsmaP, to make it easier to implement alternative implementations of the CC2420 stack.

2/4/2007 : SendNotifier

  • Provide the SendNotifier interface in CC2420ActiveMessageC to support CTP + LPL integration


1/17/2007 : LQI / RSSI

  • An edge case was found in CC2420ReceiveP where the LQI and/or RSSI values can be corrupted for packets using TOSH_DATA_LENGTH and (TOSH_DATA_LENGTH - 1) length payloads.