CC2420 Recent Updates

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.