getdata() function: is it a realtime getting data from DAC ?

Chayanun

2015 3 12

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4 次查看（30 天）

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Hi, I'm new in real time processing field. I want to analyze the data to detect some range of frequency every half second. Here is my code. the data show me every 1 sec with around 0.03-0.06 time-delay. I think my code received the data 200 sample per loop(sec).

My question is can I get the data in every half sec or every 1/200 sec (which mean 1 input, 1 data come).

THANK YOU

if true
  delete(daqfind)
ai=analoginput('nidaq','Dev1');
addchannel(ai,0); %DAQ Channel [x]
set(ai,'InputType','Differential');
ActualRate = setverify(ai,'SampleRate',200);
set(ai, 'TriggerType','Manual');
set(ai,'SamplesPerTrigger',200);
set(ai,'TriggerRepeat',inf);
start(ai);
i=1;
while(true)
      trigger(ai)
%         a=tic;
      [data,time] = getdata(ai);
%         time1(i,1)=toc(a)
 t = timer('TimerFcn',@(x,y)disp('Hello World!'),'StartDelay',0);
      if length(data)==200
          clearvars data time
      end
        i=i+1;
end
  end