Hi,
It works now. Many thanks :-)
Ittipong
2009/2/24 Anton <ag...@disi.unitn.it>
> 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.
>
>
_______________________________________________
Tinyos-help mailing list
Tinyos-help@millennium.berkeley.edu
https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
