RJT_get_temperature.m

% Code to capture temperature data from the thermoprobe using NI PCI-6221 (37 pin) DAQ board
% For JHU Matlab 2006a (w/ DAQ toolbox)
% Programmed by Rob
% Last revision: 3/29/2007


clear all;
clc;


% Initialize the data file

[DataFileName,DataPathName] = uiputfile('.txt','Where would you like to save your data?','temperature_time_DAQ.txt');
cd(DataPathName);
Header = '%#   t [s]  T [oC]';
dlmwrite(DataFileName,Header,'delimiter','','-append');

% Initialize the DAQ board

AI = analoginput('nidaq','Dev1');
addchannel(AI,0);

% Start the data aquisition and plot and save it in real time
% The default 'SampleRate' is 10 kS/s and the default 'SamplesPerTrigger'is 1000

set(AI,'InputType','SingleEnded'); % DAQ board input type (bascially same as RSE input)
set(AI,'Timeout',2);
set(AI,'SampleRate',250000);
set(AI,'SamplesPerTrigger',2500);
tic; % Start the timer

for i = 1:1e6;

    start(AI);
    raw_data = getdata(AI);
    t = round(10*toc)/10; % Register the time when data point i was captured
    T = round(10*mean(raw_data)*985)/10; % Convert voltage to oC using a linear scaling
    current_data_line = [i t T];
    dlmwrite(DataFileName,current_data_line,'delimiter','\t','-append');

    plot(t,T,'og');
    xlabel('Time [s]');
    ylabel('Temperature [\circC]');
    hold on;
    title(['Current Temperature: ',num2str(T),' [\circC]'],'FontSize',18);
    drawnow;
end;