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

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Lorena Santamaria
Lorena Santamaria 2022-12-13
评论： Lorena Santamaria 2022-12-14
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....
  4 个评论
显示 2更早的评论
Lorena Santamaria
Lorena Santamaria 2022-12-14
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
Lorena Santamaria 2022-12-14
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);

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