CC2420 Recent Updates

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.

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

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.