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mdaqDSPBuild

Build DSP application from Xcos model

Calling Sequence

mdaqDSPBuild(path);

Description

This function builds DSP executable from provided Xcos model.

Arguments

Example

// Script execution duration in seconds
TIME = 20;

// Model execution frequency in Hertz
FREQ = 5000;

// Build DSP binary from Xcos model
mdaqDSPBuild(mdaqToolboxPath() + filesep() + "examples" + filesep() +"fft_demo.zcos");

// Start DSP application
mdaqDSPInit('fft_demo_scig\fft_demo.out', FREQ, -1);
mdaqDSPStart();

first_time = 1;
a = []; s = [];

// Process data from DSP
sample_count = FREQ/10;
fig = figure("Figure_name","MicroDAQ FFT demo");

for i=1:(TIME*10)
  s = mdaqDSPRead(1, 1, sample_count, 1);
 
  N=size(s,'*');  //number of samples
  s = s - mean(s);//cut DC
  y=fft(s');

  f= FREQ*(0:(N/10))/N; //associated frequency vector
  n=size(f,'*');

  if is_handle_valid(fig) then
      if first_time == 1 then
          clf();
          plot(f,abs(y(1:n)));
          title("FFT", "fontsize", 3);
          xlabel("frequency [Hz]","fontsize", 3);
          first_time = 0;
          a = gca();
      else
          a.children.children.data(:,2) = abs(y(1:n))';
      end
  else
      break;
  end
end

// Stop DSP execution
mdaqDSPStop();

// Close plot
mprintf("\nFFT demo has been stopped.");
if is_handle_valid(fig) then
  close(fig);
end

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