Документация

%% Auto-generated by Data Acquisition Toolbox Analog Output Generator in MATLAB R2020a.
%% Create DataAcquisition Object
% Create a DataAcquisition object for the specified vendor.

d = daq("ni");
%% Add Channels
% Add channels and set channel properties, if any.

addoutput(d,"Dev1","ao0","Voltage");
%% Set DataAcquisition Rate
% Set scan rate.

d.Rate = 250000;
%% Define Test Signal
% Create a test sine wave signal of specified peak-to-peak amplitude for each 
% channel.

amplitudePeakToPeak_ch1 = 20;

sineFrequency = 10; % 10 Hz
totalDuration = 1; % 1 seconds

outputSignal = [];
outputSignal(:,1) = createSine(amplitudePeakToPeak_ch1/2, ...
                        sineFrequency, d.Rate, "bipolar", totalDuration);
outputSignal(end+1,:) = 0;
%% Generate Signal
% Write the signal data.

write(d,outputSignal);
%% Clean Up
% Clear all DataAcquisition and channel objects.

clear d outputSignal
%% Create Test Signal
% Helper function for creating test sine wave signal.

function sine = createSine(A, f, sampleRate, type, duration)

numSamplesPerCycle = floor(sampleRate/f);
T = 1/f;
timestep = T/numSamplesPerCycle;
t = (0 : timestep : T-timestep)';

if type == "bipolar"
    y = A*sin(2*pi*f*t);
elseif type == "unipolar"
    y = A*sin(2*pi*f*t) + A;
end

numCycles = round(f*duration);
sine = repmat(y,numCycles,1);
end

%% Auto-generated by Data Acquisition Toolbox Analog Output Generator in MATLAB R2019b
%% Create Data Acquisition Session
% Create a session for the specified vendor.

s = daq.createSession('ni');
%% Set Session Properties
% Set properties that are not using default values.

s.Rate = 250000;
%% Add Channels to Session
% Add channels and set channel properties.

addAnalogOutputChannel(s,'Dev1','ao0','Voltage');
%% Define Test Signal
% Create a test sine wave signal of specified peak-to-peak amplitude for each 
% channel.

amplitudePeakToPeak_ch1 = 20;

sineFrequency = 10; % 10 Hz
totalDuration = 1; % 1 seconds

outputSignal(:,1) = createSine(amplitudePeakToPeak_ch1/2, ...
                        sineFrequency, s.Rate, 'bipolar', totalDuration);
outputSignal(end+1,:) = 0;
%% Queue Signal Data
% Make signal data available to session for generation.

queueOutputData(s,outputSignal);
%% Generate Signal
% Start foreground generation

startForeground(s);
%% Clean Up
% Clear the session and channels.

clear s outputSignal
%% Create Test Signal
% Helper function for creating test sine wave signal.

function sine = createSine(amplitude, frequency, sampleRate, type, duration)

sampleRatePerCycle = floor(sampleRate/frequency);
period = 1/frequency;
s = period/sampleRatePerCycle;
t = (0 : s : period-s)';

if strcmpi(type, 'bipolar')
    y = amplitude*sin(2*pi*frequency*t);
elseif strcmpi(type, 'unipolar')
    y = amplitude*sin(2*pi*frequency*t) + amplitude;
end

numCycles = round(frequency*duration);
sine = repmat(y, numCycles, 1);
end