Difference between revisions of "EGR 103/DAQ 2"

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This page contains pictures and graphs related to DAQ 2 for [[EGR 53]].  It has been updated for Fall, 2011.
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<h1>This is the old page</h1>
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You probably want [[Python:DAQ 2]]
  
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== Note About DAQ Cards==
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<!--
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* DAQ 2-3: After you add two channels, you may receive the following:
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This page contains pictures and graphs related to DAQ 2 for [[EGR 103]]. It has been updated for Spring 2018.
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<source lang="text">Warning: This hardware could not support the requested value of 1000.00 for  
 
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SampleRate. SampleRate has been set to 500.00. </source>
 
  
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Your program will still work, just slower.  This is an issue with the drivers on some of the computers and does not represent a problem for this lab.
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==Notes ==
 +
 
 +
* As before, if the system seems to not recognize Dev1, try Dev2 instead.
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* Here is the web page for MATLAB default plot colors: [https://www.mathworks.com/help/matlab/graphics_transition/why-are-plot-lines-different-colors.html Link]
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* [[MATLAB:Flexible Programming]]
 +
 
 +
=== Pauses ===
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There are <code>pause</code> commands in the code which will cause the program to...pause - specifically when the program first runs to check the lights.  You will need to hit a key to un-pause the program.  The way to see if the program is paused is to look at the bottom left corner of your MATLAB window - it will tell you if it is paused.
 +
 
 +
=== Graph Labels ===
 +
For this assignment, you do not need labels or titles for graphs.  In a later assignment, you will add them.
  
 
== Circuit for BasicAOutput ==
 
== Circuit for BasicAOutput ==
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Circuit layout for BasicAOutput.
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Circuit layout for BasicAOutput - '''You only need the left-most circuit, however'''
 
<center>
 
<center>
 
[[Image:Circuit1.jpg|400px]]
 
[[Image:Circuit1.jpg|400px]]
 
</center>
 
</center>
 
== Circuit for BasicAIO ==
 
== Circuit for BasicAIO ==
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Circuit layout for BasicAIO (two measurements).
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Circuit layout for BasicAIO - '''You only need the left-most circuit, however'''
 
<center>
 
<center>
 
[[Image:Circuit2.jpg|400px]]
 
[[Image:Circuit2.jpg|400px]]
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== Graph from BasicAIO ==
 
== Graph from BasicAIO ==
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Graph showing outputs when
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Graph showing output when
 
<source lang="matlab">
 
<source lang="matlab">
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Vout0 = 2.5+2.5*sin(2*pi*k/100);
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Vout = 2.5+2.5*sin(2*pi*k/100);
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Vout1 = 2.5+2.5*cos(2*pi*k/100);
 
 
</source>
 
</source>
 
That is,
 
That is,
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<math>
 
<math>
 
\begin{align}
 
\begin{align}
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V_{out,\,0}=2.5+2.5\sin\left(\frac{2\pi k}{100}\right)\\
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V_{out}=2.5+2.5\sin\left(\frac{2\pi k}{100}\right)
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V_{out,\,1}=2.5+2.5\cos\left(\frac{2\pi k}{100}\right)
 
 
\end{align}
 
\end{align}
 
</math>
 
</math>
 
</center>
 
</center>
 
<center>
 
<center>
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[[Image:Circuit2Plot.png|500px]]
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[[Image:Circuit2PlotX.png|500px]]
 
</center>
 
</center>
  
 
== Circuit for AIO ==
 
== Circuit for AIO ==
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Circuit layout for AIO (six measurements).
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Circuit layout for AIO - '''You only need the left-most circuit, however'''
 
<center>
 
<center>
 
[[Image:Circuit3.jpg|400px]]
 
[[Image:Circuit3.jpg|400px]]
 
</center>
 
</center>
 
== Graph from AIO ==
 
== Graph from AIO ==
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Graph showing outputs from six measurement channels.
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Graph showing outputs from three measurement channels. Note at the far left that they all start at either exactly -1 V or 0 V!
 
<center>
 
<center>
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[[Image:VoltagesFigure.png|500 px]]
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New Colors: Blue Orange Yellow Purple Green Cyan<br>
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[[Image:VoltagesFigureRed.png|300 px]]<br>
 
</center>
 
</center>
  
 +
== Codes ==
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Pasting codes from PDF files is...a bad idea.  Here are the text versions of some of the codes in the assignment.
 +
 +
=== BasicAOutput.m===
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<source lang="matlab">
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% Initialize workspace and graph
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clear; format short e; figure(1); clf; daqreset;
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 +
% Create a session
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s = daq.createSession('ni');
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 +
% set sample rate
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SampleRate = 1000;
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s.Rate = SampleRate;
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% Add channel 0 to output
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chO = addAnalogOutputChannel(s,'Dev1',[0],'Voltage');
 +
 +
% Review card information
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s
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chO
 +
 +
% Write values to output channel
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outputSingleScan(s, [5]);
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fprintf('Press return to continue\n');
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pause
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outputSingleScan(s, [0]); 
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 +
% Use loop to set several different voltages
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for k=1:300
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    % Calculate voltages for each channel
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    Vout = 2.5+2.5*sin(2*pi*k/100);
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    % Put voltage to output channel
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    outputSingleScan(s, [Vout])
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    pause(0.02)
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end
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% Turn output off
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outputSingleScan(s, [0]); 
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</source>
 +
 +
===BasicAIO.m===
 +
<source lang="matlab">
 +
% Initialize workspace and graph
 +
clear; format short e; figure(1); clf; daqreset;
 +
 +
% Create a session
 +
s = daq.createSession('ni');
 +
 +
% set sample rate
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SampleRate = 1000;
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s.Rate = SampleRate;
 +
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% Add channel 0 to output
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chO = addAnalogOutputChannel(s,'Dev1',[0],'Voltage');
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% Add channels 0-3 to input
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chI = addAnalogInputChannel(s,'Dev1',[0],'Voltage');
 +
 +
% Review card information
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s
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chO
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chI
 +
 +
% Write values to output channel
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outputSingleScan(s, [5]);
 +
fprintf('Press return to continue\n');
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pause
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outputSingleScan(s, [0]); 
 +
 +
% Use loop to set several different voltages
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for k=1:300
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    % Calculate voltages for each channel
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    Vout = 2.5+2.5*sin(2*pi*k/100);
 +
    % Put voltage to output channel
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    outputSingleScan(s, [Vout])
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    % Read voltage from input channel
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    Voltages(k,:) = inputSingleScan(s);
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    pause(0.02)
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end
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% Turn output off
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outputSingleScan(s, [0]); 
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 +
% Plot voltage versus index
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n = 1:k;
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Vtotal  = Voltages(:,1);
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plot(n, Vtotal, 'r')
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legend('Total Voltage', 'Location', 'Best')
 +
 +
</source>
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-->
 +
<!--
 +
=== Function to Plot Curves ===
 +
<source lang="matlab">
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function CurvePlotter(Vin, MyAdjective)
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subplot(1, 2, 1)
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plot(Vin(:,1), Vin(:,1), 'k-',...
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    Vin(:,1), Vin(:,2), 'b-',...
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    Vin(:,1), Vin(:,3), 'g-')
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axis([-1 5 -1 5])
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grid on
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title(sprintf('%s Green', MyAdjective))
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subplot(1, 2, 2)
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plot(Vin(:,4), Vin(:,4), 'k-',...
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    Vin(:,4), Vin(:,5), 'm-',...
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    Vin(:,4), Vin(:,6), 'r-')
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axis([-1 5 -1 5])
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grid on
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title(sprintf('%s Red', MyAdjective))
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</source>
 +
 +
=== Script to Plot All Three Figures ===
 +
 +
<source lang="matlab">
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clear
 +
 +
% Small LEDs
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load SmallData
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figure(1); clf
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CurvePlotter(Voltages, 'Small')
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print -dpng SmallPlot % This will make SmallPlot.png
 +
 +
% Large LEDs
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%% your code here
  
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% Rectangular LEDs
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%% your code here
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</source>
 +
-->
  
 
== Questions ==
 
== Questions ==
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<references />
 
<references />
  
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[[Category:EGR 53]]
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[[Category:EGR 103]]

Latest revision as of 16:09, 3 April 2019

This is the old page

You probably want Python:DAQ 2


Questions

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External Links

References

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