initialise_demo.m

%% initialise_demo.m
% Script that shows how to prepare some test signal sources for AWG.
%
% For those unfamilliar with MATLAB some example code is provided to save/load
% signals, scale signals to volts and generate some basic plots.

%% How to define UUT
global UUT
% Without DNS
UUT = '10.12.196.103'; % IP address of YOUR product, this is just an example.
% With DNS
UUT = 'acq1001_025';


%% Create some sine, square and sawtooth waves for demo.
% Saved to .mat files in ZIP file for convenience.
t = 1:16384;
x1 = 32768*sin(2*pi*(1/(16384/8))*t);
x2 = 32768*sin(2*pi*((1/(16384/8))*t)+pi/4);
x3 = 32768*sin(2*pi*((1/(16384/8))*t)+pi/2);
x4 = 32768*sin(2*pi*((1/(16384/8))*t)+3*pi/4);
saw=2*16384*( (t/(16384/8)) - floor( 0.5+(t/(16384/8)) ));
sq(1:1024)=0; sq(1025:2048)=1; sq=horzcat(sq,sq); sq=horzcat(sq,sq); sq=horzcat(sq,sq); sq=sq.*32768;


%% Transpose arrays (format D-TACQ cards prefer)
x1=x1';
x2=x2';
x3=x3';
x4=x4';
saw=saw';
sq=sq';


%% How to save/load your signals to file for easy retrieval in MATLAB
%SAVE
save('sin1.mat','-ascii','x1')
save('sin2.mat','-ascii','x2');
save('sin3.mat','-ascii','x3');
save('sin4.mat','-ascii','x4');
save('sq.mat','-ascii','sq');
save('half_saw.mat','-ascii','saw');

%LOAD
x1 = load('sin1.mat','-ascii','x1');
x2 = load('sin2.mat','-ascii','x2');
x3 = load('sin3.mat','-ascii','x3');
x4 = load('sin4.mat','-ascii','x4');
sq = load('sq.mat','-ascii','sq');
saw = load('half_saw.mat','-ascii','saw');


%% Scale to Volts (FOR LOCAL PLOTS ONLY, SEND RAW CODES TO UUT)
vsf = 10/2^16; % Voltage Scaling Factor

x1_volts = x1.*vsf;
x2_volts = x2.*vsf;
x3_volts = x3.*vsf;
x4_volts = x4.*vsf;
sq_volts = sq.*vsf;
saw_volts = saw.*vsf;


%% Plot multiple signals on one graph
% To do this in one command, all signals must be the same length and an
% index variable to plot against must be created.

index = 1:(length(x1));
fig1 = figure(1);
plot(index,x1_volts,index,x2_volts,index,x3_volts,index,x4_volts,index,sq_volts,index,saw_volts);
set(fig1,'units','normalized','outerposition',[0 0 1 1]); % MATLABs best approximation
shg % Show graph, brings figure window to fore

%%
% To do this over several commands, with signals of different lengths and
% amplitudes you can use the "hold all" command. This will plot successive
% plot commands onto the same figure.
x_big = 2.*x1_volts; x_big = vertcat(x_big, x_big);
sig_array = {x1_volts, x2_volts, x3_volts, x4_volts, sq_volts, saw_volts, x_big};

fig2 = figure(2);
hold all
for i=1:7
    plot(sig_array{i})
end

% These 3 lines resize the figure to a more suitable size
scrn = get(0,'ScreenSize');
pos1 = [0.1*scrn(3),0.1*scrn(4),0.8*scrn(3),0.8*scrn(4)];
set(fig2,'OuterPosition',pos1);

title('AWG Source Plot')
xlabel('# of Samples')
ylabel('Volts')
box on % Completes axes on North and East sides
shg

%close all % Closes all figure windows
%hold off  % Turns off HOLD