% PMD1208_2ch.m - sample two A/D channels on PMD-1208FS
% HJSIII, 03.07.29
% Mike Pritts, 05.05.24

% sample 512 data points at 200Hz
%   Lab 7 - use channel zero for unfiltered square wave
%   Lab 7 - use channel one for filtered square wave
% "chan0" = 512 data points on Ch 0
% "chan1" = 512 data points on Ch 1

% connect MATLAB object (ai) to ComputerBoards (mcc) device (1)
% in 339 Reber, the PMD-1208FS boards are installed as mcc device 1
ai = analoginput( 'mcc', 1 );

% use channels 0 and 1
addchannel( ai, 0:1 );

set(ai, 'InputType', 'Differential');

% sampling rate and length of burst
set( ai, 'SampleRate', 200 )
set( ai, 'SamplesPerTrigger', 512 )

% activate PMD-1208FS - NOTE:  this does not actually start sampling
start( ai )

% sample burst
[ data, time, abstime, events ] = getdata( ai );

% organize data
chan0 = data(:,1);
chan1 = data(:,2);

% plot
subplot( 2, 1, 1 )
  plot( time, chan0 )
  xlabel( 'Time [sec]' )
  ylabel( 'Channel 0 [V]' )

subplot( 2, 1, 2 );
  plot( time, chan1 );
  xlabel( 'Time [sec]' )
  ylabel( 'Channel 1 [V]' )

% deactivate board
stop(ai); 

% deletes board object, ai no longer usable 
delete(ai)
clear ai