sensing - tinyos documentation wiki.htm

从官方网站上下载tinyos2.0的学习指南

    interface Receive;
    interface Timer;
    interface Read;
    interface Leds;
  }
}
</PRE>
<P><CODE>Oscilloscope</CODE> is a combination of different building blocks 
introduced in previous parts of the tutorial. Like [Sensing$The Sense 
Application|<CODE>Sense</CODE>], <CODE>Oscilloscope</CODE> uses 
<CODE>DemoSensorC</CODE> and a timer to periodically sample the default sensor 
of a platform. When it has gathered 10 sensor readings 
<CODE>OscilloscopeC</CODE> puts them into a message and broadcasts that message 
via the <CODE>AMSend</CODE> interface. <CODE>OscilloscopeC</CODE> uses the 
<CODE>Receive</CODE> interface for synchronization purposes (see below) and the 
<CODE>SplitControl</CODE> interface, to switch the radio on. If you want to know 
more about mote-mote radio communication read [Mote-mote radio 
communication|lesson 3]. </P><A name=Running_the_Oscilloscope_application></A>
<H2><SPAN class=mw-headline>Running the Oscilloscope application</SPAN></H2>
<P>To install the <CODE>Oscilloscope</CODE> application go to 
<CODE>tinyos-2.x/apps/Oscilloscope</CODE> and depending on which hardware you 
have, type something similar to <CODE>make telosb install,1</CODE>. Note the 
"<CODE>,1</CODE>" after the <CODE>install</CODE> option, which assigns ID 1 to 
the node. Assigning IDs to nodes is helpful to differentiate them later on in 
the GUI, so make sure you assign different IDs to all nodes on which 
<CODE>Oscilloscope</CODE> is installed (e.g. install <CODE>Oscilloscope</CODE> 
on a second node with <CODE>make telosb install,2</CODE> and so on). A node 
running <CODE>Oscilloscope</CODE> will toggle its second LED for every message 
it has sent and it will toggle its third LED when it has received an 
<CODE>Oscilloscope</CODE> message from another node: incoming messages are used 
for sequence number synchronization to let nodes catch up when they are switched 
on later than the others; they are also used for changing the sample rate that 
defines how often sensor values are read. In case of a problem with the radio 
connection the first LED will toggle. </P>
<P>Install <CODE>BaseStation</CODE> on another node and connect it to your PC. 
As usual, on the <CODE>BaseStation</CODE> node you should see the second LED 
toggle for every message bridged from radio to serial. </P><A 
name=Running_the_Java_GUI></A>
<H2><SPAN class=mw-headline>Running the Java GUI</SPAN></H2>
<P>To visualize the sensor readings on your PC first go to 
<CODE>tinyos-2.x/apps/Oscilloscope/java</CODE> and type <CODE>make</CODE>. This 
creates/compiles the necessary message classes and the <CODE>Oscilloscope</CODE> 
Java GUI. Now start a SerialForwarder and make sure it connects to the node on 
which you have installed the <CODE>BaseStation</CODE> application (how this is 
done is explained in the <A 
title="Mote-PC serial communication and SerialForwarder" 
href="http://docs.tinyos.net/index.php/Mote-PC_serial_communication_and_SerialForwarder">previous 
lesson</A>). In case you have problems with the Java compilation or the serial 
connection work through the <A 
title="Mote-PC serial communication and SerialForwarder" 
href="http://docs.tinyos.net/index.php/Mote-PC_serial_communication_and_SerialForwarder">previous 
lesson</A>. </P>
<P>Once you have a SerialForwarder running you can start the GUI by typing 
<CODE>./run</CODE> (in <CODE>tinyos-2.x/apps/Oscilloscope/java</CODE>). You 
should see a window similar to the one below: </P>
<CENTER><A class=image title=Image:oscilloscope.jpg 
href="http://docs.tinyos.net/index.php/Image:Oscilloscope.jpg"><IMG height=504 
alt=Image:oscilloscope.jpg 
src="Sensing - TinyOS Documentation Wiki.files/Oscilloscope.jpg" width=610 
border=0></A></CENTER>
<P>Each node is represented by a line of different color (you can change the 
color by clicking on it in the mote table). The x-axis is the packet counter 
number and the y-axis is the sensor reading. To change the sample rate edit the 
number in the "sample rate" input box. When you press enter, a message 
containing the new rate is created and broadcast via the 
<CODE>BaseStation</CODE> node to all nodes in the network. You can clear all 
received data on the graphical display by clicking on the "clear data" button. 
</P>
<P>The <CODE>Oscilloscope</CODE> (or <CODE>Sense</CODE>) application displays 
the raw data as signalled by the <CODE>Read.readDone()</CODE> event. How the 
values are to be interpreted is out of scope of the application, but the GUI 
let's you adapt the visible portion of the y-axis to a plausible range (at the 
bottom right). </P><A name=Related_Documentation></A>
<H1><SPAN class=mw-headline>Related Documentation</SPAN></H1>
<UL>
  <LI><A class="external text" 
  title=http://nescc.sourceforge.net/papers/nesc-ref.pdf 
  href="http://nescc.sourceforge.net/papers/nesc-ref.pdf" rel=nofollow>nesC 
  reference manual</A> 
  <LI><A class="external text" 
  title=http://www.tinyos.net/tinyos-2.x/doc/html/tep101.html 
  href="http://www.tinyos.net/tinyos-2.x/doc/html/tep101.html" rel=nofollow>TEP 
  101: ADC</A> 
  <LI><A class="external text" 
  title=http://www.tinyos.net/tinyos-2.x/doc/html/tep114.html 
  href="http://www.tinyos.net/tinyos-2.x/doc/html/tep114.html" rel=nofollow>TEP 
  114: SIDs: Source and Sink Independent Drivers</A> 
  <LI><A class="external text" 
  title=http://csl.stanford.edu/~pal/pubs/tinyos-programming-1-0.pdf 
  href="http://csl.stanford.edu/~pal/pubs/tinyos-programming-1-0.pdf" 
  rel=nofollow>TinyOS Programming Guide</A> </LI></UL>
<HR>

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