Tinyos学习笔记（一）

简述：发送和接受数据的程序分别烧录到两个节点上，发送方发送流水灯数据，接受方接受数据并实现流水灯

1、发送和接受程序用到的组件及其接口如图(通过make telosb docs获得)所示：

 

2、发送程序sendC.nc代码：

#include "Timer.h"

#include "send.h"



module sendC @safe()

{

    uses{

        interface Boot;

        interface Timer<TMilli> as Timer;



        interface SplitControl as AMControl;

        interface Packet;

        interface AMSend;

    }

}

implementation

{

    uint8_t dataS=1;

    bool busy=FALSE;//if write 'false',`false' undeclared here (not in a function)

    message_t pkt;



    void startTimer()//internal function

    {

        call Timer.startPeriodic(500);

    }



    //start radio

    event void Boot.booted()

    {

        call AMControl.start();

    }

    event void AMControl.startDone(error_t err)

    {

        if(SUCCESS==err)

            startTimer();

        else

            call AMControl.start();

    }

    event void AMControl.stopDone(error_t err){}

    

    task void compute()

    {

        if(dataS>=0x04)

            dataS=1;

        else

            dataS=dataS<<1;

    }

    event void Timer.fired()

    {    

        if(!busy)    

        {

            MsgToRadio* trpkt=(MsgToRadio*)(call Packet.getPayload(&pkt,sizeof(MsgToRadio)));

            if(NULL==trpkt)

                return;

            trpkt->nodeid=TOS_NODE_ID;//发送节点的ID，TOS_NODE_ID为在make telosb install，1时设置的

            trpkt->dataS=dataS;

            //AM_BROADCAST_ADDR广播模式,修改AM_BROADCAST_ADDR为2，则节点只向2号节点发，其他节点不响应

            if(call AMSend.send(AM_BROADCAST_ADDR,&pkt,sizeof(MsgToRadio))==SUCCESS)//在if(!busy)里面????

                busy=TRUE;

        }        

        post compute();

    }

    event void AMSend.sendDone(message_t* msg,error_t err)

    {

        if(msg==&pkt)

            busy=FALSE;

    }

}

3、发送程序sendCAppC.nc代码：

configuration sendAppC

{

}

implementation

{

    components MainC,sendC;

    components new TimerMilliC();



    components ActiveMessageC;

    components new AMSenderC(6);



    sendC.Boot->MainC;

    sendC.Timer->TimerMilliC;



    sendC.AMControl->ActiveMessageC;

    sendC.Packet->AMSenderC;

    sendC.AMSend->AMSenderC;



}

4、发送程序send.h代码：

#ifndef SEND_H

#define SEND_H



typedef nx_struct MsgToRadio

{

    nx_uint8_t nodeid;

    nx_uint8_t dataS;

}MsgToRadio;



#endif

5、接受程序核心代码：

//an event-driven process

event message_t* Receive.receive(message_t* msg,void* payload,uint8_t len)

{

    if(len==sizeof(MsgFromRadio))

    {

        MsgFromRadio* frpkt=(MsgFromRadio*)payload;

        call Leds.set(frpkt->dataR);

    }

    return msg;

}

参考网址：http://tinyos.stanford.edu/tinyos-wiki/index.php/Mote-mote_radio_communication