Message points to the whole message struct which includes header, payload and footer. You need it when you need to manipulate the message struct. For instance - set acknowledgment or Tx power. The payload pointer is a pointer to the payload inside the above mentioned struct.You should use it when you need to change / add actual payload to your message.
Arik On Sun, Apr 18, 2010 at 14:05, chikh omar <[email protected]> wrote: > hello, > for the event revceive: > event message_t *receive(message_t *msg, void *payload, uint8_t len) > > what is the difference between msg and payload and when we use each > parameter > > thanks for explanation, > Cheers, > > *********************************************** > Omar Cheikhrouhou > **Engineer & Researcher @SENS Lab (Software Engineering and Network > Security) > Higher Institute of Technological Studies - Address : Mahdia's road Km 2.5 > Sfax. BP 88 A - 3099 El Bustan Sfax Telephone : (+216)74 237425 Poste : 437 > ** **Fax: : (+216)74 431 386* > > *Ph.D @ CES Lab (Computer and Embedded System)-University of Sfax, > National School of Engineers BP W, Sfax, 3038, Tunisia , Fax:(+216)74665369 > ** * > > *Coordinator C2i @ ISET Sfax (Certified C2i since 2008)* > > > > _______________________________________________ > Tinyos-help mailing list > [email protected] > https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help > -- Best Regards, Arik Sapojnik
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