[Tinyos-help] CC2420 Packet Metadata

[Tal Rusak]

Hi,
     I have seen in TinyOS code (for example,
tinyos-2.x/tos/chips/cc2420/receive/CC2420ReceiveP.nc) that each
received packets has attached metadata, such as time, crc, rssi, and lqi.
I looked at the CC2420 datasheet and I did not find any
information about metadata collection.
     Does anyone know when/how the metadata is collected?

Thanks,
Tal