It is my understanding that BaseStation is acting as a bridge so that is why it copies the source address.
eric 2009/2/7 wkq5325 <[email protected]> > Hi all, > I am sorry to trouble you,Can you please explain the following question > to me? > > The following code is from tinyos-2.x/apps/BaseStation/BaseStationP.nc > task void uartSendTask() { > ........ > atomic > if (uartIn == uartOut && !uartFull) > { > uartBusy = FALSE; > return; > } > msg = uartQueue[uartOut]; > tmpLen = len = call RadioPacket.payloadLength(msg); > id = call RadioAMPacket.type(msg); > addr = call RadioAMPacket.destination(msg); > src = call RadioAMPacket.source(msg); > call UartPacket.clear(msg); > call UartAMPacket.setSource(msg, src); > > if (call UartSend.send[id](addr, uartQueue[uartOut], len) == SUCCESS) > call Leds.led1Toggle(); > else > { > failBlink(); > post uartSendTask(); > } > } > /*Is it planning to acess radio message header,and deciding to send radio > message to serial?? If so, call UartSend.send it means to send radio > message to serial.Then why use call UartAMPacket.setSource(msg, src) ? What > is its role? Why no use call UartAMPacket.setDestination(msg, src) */ > > Thanks for kind help！ > Sincerely > wkq > > > ------------------------------ > 免费送你钻戒作情人节礼物 <http://love.mail.163.com/valentine/main.do> > _______________________________________________ > Tinyos-help mailing list > [email protected] > https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help > -- Eric B. Decker Senior (over 50 :-) Researcher Autonomous Systems Lab Jack Baskin School of Engineering UCSC
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