HW2: Q&A

Oct. 02, 2007

Lab Machine

TinyOS is installed in one machine (531AB). But, you have to bring your kit. There is a sign up sheet. Please sign up to reserve a time slot.

No password needed.

Procedure

PC(java program)

BSMib510+mica2

(apps\TOSBase)

Mica2+sensor(NesC program)

1. Get input (type, id)

2. Broadcast it to radio

3. Check id

4. Sense light/temp/acoustic

5. Send sensed data

6. Forward it to the serial port

7. Display it

hw2.java

package net.tinyos.tools;

import java.io.*;import net.tinyos.packet.*;import net.tinyos.util.*;import net.tinyos.message.*;

public class HW2_skel { public static void main(String args[]) throws IOException {

if (args.length > 0) {/* Print out a message *

* System.err.println(); */

System.exit(2);}

// Create a serial reader and writer

PacketSource srw = BuildSource.makePacketSource();if (srw == null) { System.err.println("Invalid packet source (check your MOTECOM environment variable)"); System.exit(2);}

hw2.java - continue

srw.open(PrintStreamMessenger.err);

try { // Read a packet from a serial port byte[] packet = srw.readPacket();

// Write a packet to a serial port // Please look at the lesson 6 to see the packet format srw.writePacket(packet);

// Display this on a screen Dump.printPacket(System.out, packet); System.out.println(); System.out.flush();}catch (IOException e) { System.err.println("Error on " + srw.getName() + ": " + e);}

}}

SenseMsg.h

struct SenseMsg{ uint16_t sourceMoteID; //Holds the queried mote id uint16_t datatype; // The type of data that is being sensed 1 for

Temperature 2 for Light and 3 for Mic readings uint16_t data; // The sensed data.};

enum { AM_SENSEMSG = 100,};

Packet format

Format

Other java programs

Check out \opt\tinyos-1.x\tools\java\net\tinyos\tools

Dest. address

Active Msg handler

Group ID Msg length

Payload (SenseMsg.h)

SourceID datatype Data

2 bytes 1 byte 1 byte 1 byte 2 bytes 2 bytes 2 bytes

FF FF 64 7D 06

hw2.nc (configuration)

includes SenseMsg;

configuration hw2 { }implementation{ components Main, hw2M, LedsC, Photo, GenericComm as Comm;

Main.StdControl -> hw2M; Main.StdControl -> Comm; hw2M.Leds -> LedsC; hw2M.ADCLight -> Photo; hw2M.LightControl -> Photo;

hw2M.DataMsg -> Comm.SendMsg[AM_SENSEMSG]; hw2M.RecMsg -> Comm.ReceiveMsg[AM_SENSEMSG];}

hw2M.nc (Module)

includes SenseMsg;

module hw2M{ provides interface StdControl; uses { interface Leds; interface ADC as ADCLight;

interface StdControl as LightControl;

interface StdControl as CommControl; interface SendMsg as DataMsg; interface ReceiveMsg as RecMsg; }}

hw2M.nc (Module) - Continue

implementation{ TOS_Msg msg;

command result_t StdControl.init() { // initialization return SUCCESS; }

command result_t StdControl.start() { // starting return SUCCESS; }

command result_t StdControl.stop() { // stopping return SUCCESS; }

hw2M.nc (Module) - Continue

async event result_t ADCLight.dataReady(uint16_t data) { // When sensing is done,

return SUCCESS; }

event result_t DataMsg.sendDone(TOS_MsgPtr sent, result_t success) { return SUCCESS; }

event TOS_MsgPtr RecMsg.receive(TOS_MsgPtr m) { // When a packet is received

return m; }}

Other sensors?

Check out

\opt\tinyos-1.x\tos\sensorboards\micasb

e.g) Photo.nc: for light sensors

Makefile

// specify the component to install

COMPONENT=hw2

PFLAGS=-I../hw2

// set the frequency of mica2 as 916.7 MHz

PFLAGS += -DCC1K_DEF_FREQ=916700000

include ../Makerules