Hi,
I do timestamps in this way:
async event void RadioTimeStamping.transmittedSFD(uint16_t time,
message_t* p_msg){
//get the current time and replace the lower half-word with
SFD-captured timer content:
timertime=timeget();
mytimebuf=(((((timertime&0x0000FFFFUL)>((uint32_t)time&0x0000FFFFUL))?timertime:(timertime-0x00010000UL))&0xFFFF0000UL)|((uint32_t)time&0x0000FFFFUL));
transmittime=mytimebuf;
//load the 32-bit timestamp to a uint8_t 4-elements' array:
for(v=0;v<4;v++){
mytime[v]=(uint8_t)((mytimebuf>>((3-v)*8))&0x000000FFUL);
}
//write the timestamp to the CC2420 RAM:
call CC2420Transmit.modify(
offsetof(ProtocolMsg,timeStamp)+sizeof(message_header_t), mytime, 4);
}
This works. To use "message_header_t" it is necessary to include
"CC2420.h" in the program. "timeStamp" is a 4-byte field of my packet,
which I put the timestamp in.
Anton.
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