can anyone help me with real time data plot using ni 9234

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avinash pabbireddy 2013-11-2

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关闭： Sabin 2023-2-11

在 MATLAB Online 中打开

s = daq.createSession('ni');
s.addAnalogInputChannel('cDAQ2Mod1', 0, 'Voltage');
s.addAnalogInputChannel('cDAQ2Mod1', 1, 'Voltage');
s.Rate = 2000
s.DurationInSeconds = 20;
s
[data5,time] = s.startForeground;
plot(time,data5);
xlabel('Time (secs)');
ylabel('Voltage')

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Walter Roberson 2013-11-3

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What difficulty are you observing?

avinash pabbireddy 2013-11-4

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i'm able to get data but i want real time plot can u help me with sample code??

Walter Roberson 2013-11-4

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Where is your callback for when data is ready?

avinash pabbireddy 2013-11-11

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编辑：Walter Roberson 2013-11-17

在 MATLAB Online 中打开

function nidaq9234
global data
s = daq.createSession('ni');
s.addAnalogInputChannel('cDAQ2Mod1',0,'voltage')
s.addAnalogInputChannel('cDAQ2Mod1', 1, 'Voltage');
s.Rate = 2000
s.DurationInSeconds = 20
lh = s.addlistener('DataAvailable',@plotData);
s.startBackground();
% Do something
while(~s.IsDone)
end
close(gcf);
plot(data); %  plot global data
function plotData(src,event)
    persistent tempData;
    global data 
    if(isempty(tempData))
         tempData = [];
     end
     plot(event.TimeStamps, event.Data)
     tempData = [tempData;event.Data];
     data = tempData;