MATLAB Programming Example for U22351A USB Modular Data Acquisition (DAQ) module’s Analog Ouput

I am trying to set up a DAQ with an arbritrary (custom) signal but as the daq toolbox is not supported any more, I need to use the instrument control toolbox with IVI components, which I am struggling with. Any advice will be great, my attempt is as follows.

addpath(genpath(toolboxdir('instrument'))); %intrument control toolbox pathway

% Connect steps: Use icdevice with the MATLAB instrument driver name and instrument's resource name to create a device object.

if (exist('KtU23xx_ivic.mdd','file') == 0)

makemid('KtU23xx', 'KtU23xx_ivic.mdd', 'ivi-c');

end

U2351A = icdevice('KtU23xx_ivic', 'USB0::0x0957::0x0F18::TW62020521::0::INSTR');

connect(U2351A);

% now the parameters for the output

U2351A.Instrumentspecificanalogoutgeneration.Mode = 1; % (1 is arbitrary signal)

U2351A.Instrumentspecificanalogoutarbitrary.SampleRate = 10000;

U2351A.Instrumentspecificanalogoutarbitrary.NumberOfStreams = -1; %continuous adquisition

U2351A.Instrumentspecificanalogoutgeneration.TriggerMode = 0; %no wait for trigger

invoke(U2351A.Instrumentspecificanalogout, 'analogoutsetpolarity', 'AOut1', 2); % AOut1 is the output analog channel and 2 is bipolar (+-10V).

invoke(U2351A.Instrumentspecificanalogout, 'analogoutsetreferencesource', 'AOut1', 1); % KTU23XX_VAL_OUTPUT_REFERENCE_INTERNAL = 1

invoke(U2351A.Instrumentspecificanalogout, 'analogoutsetenabled', 'AOut1', 1);

count=100; % silly example

while count

[ReturnCount] = invoke(U2351A.System, 'viwrite', 200, dat(count)); % dat is the signal I want to send

count=count-1

end

% stop

invoke(U2351A.Instrumentspecificanalogoutgeneration, 'analogoutgenerationstop');

% Cleanup

disconnect(U2351A);

delete(U2351A);

I am pretty sure I am missing something very obvious but I am cannot see it....

[Mario Malic]

Is using an MATLAB with the older version that still supports the device an option?

[Mario Malic]

This could be of use https://uk.mathworks.com/help/instrument/transition-your-code-to-ividev-interface.html

[Lorena Santamaria]

Thank you @Mario Malic for your help!

I am trying to avoid the older version option as this will be for a EEG closed-loop stimulation so I prefer using more updated versions to avoid other problems but if I can't make it work I will definetly go for it!

Thanks a lot.

[Lorena Santamaria]

I managed to use a system generated signal (sinusoid) if this helps anyone else although not success with a custom signal yet...

% initial declarations

addpath(genpath(toolboxdir('instrument'))); %intrument control box pathway

% Connect steps: Use icdevice with the MATLAB instrument driver name and instrument's

% resource name to create a device object.

if (exist('KtU23xx_ivic.mdd','file') == 0)

makemid('KtU23xx', 'KtU23xx_ivic.mdd', 'ivi-c');

end

U2351A = icdevice('KtU23xx_ivic', 'USB0::0x0957::0x0F18::TW62020521::0::INSTR');

connect(U2351A);

%% Commands to prepare signal and channels

U2351A.Instrumentspecificanalogoutgeneration.Mode = 2; % waveform signal (1 is arbitrary and 2 a specific signal)

U2351A.Instrumentspecificanalogoutgeneration.TriggerMode = 0; %no wait for trigger

% commands for the signal

invoke(U2351A.Instrumentspecificanalogout, 'analogoutsetpolarity', 'AOut1', 2); % KTU23XX_VAL_ANALOG_POLARITY_BIPOLAR = 2

invoke(U2351A.Instrumentspecificanalogout, 'analogoutsetreferencesource', 'AOut1', 1); % KTU23XX_VAL_OUTPUT_REFERENCE_INTERNAL = 1

invoke(U2351A.Instrumentspecificanalogout, 'analogoutsetenabled', 'AOut1', 1);

invoke(U2351A.Instrumentspecificanalogoutwaveform, 'analogoutwaveformconfigure', 'AOut1', 1, 11, 0.3, 0); % SINE = 1 /freq/amplitude/offset

% everything ready to go

invoke(U2351A.Instrumentspecificanalogoutgeneration, 'analogoutgenerationstart');

%% writing output

count=1000;

while count

ReturnCount = invoke(U2351A.System, 'viwrite', 200, 200); % write it on the device

count=count-1

end

% stop

invoke(U2351A.Instrumentspecificanalogoutgeneration, 'analogoutgenerationstop');

% Cleanup

disconnect(U2351A);

delete(U2351A);