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25 lines
581 B
25 lines
581 B
7 years ago
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% this is an example of sampling the ADC from Matlab and then plotting a
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% FFT graph. The ADC unit called 'adc' is configured to use PA1 as Ch. 0
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%transport = py.gex.TrxSerialThread(pyargs('port', '/dev/ttyUSB1', 'baud', 57600));
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transport = py.gex.TrxRawUSB();
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client = py.gex.Client(transport);
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adc = py.gex.ADC(client, 'adc');
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L=1000;
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Fs=1000;
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adc.set_sample_rate(uint32(Fs));
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data = adc.capture(uint32(L));
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data = double(py.array.array('f',data));
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Y = fft(data);
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P2 = abs(Y/L);
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P1 = P2(1:L/2+1);
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P1(2:end-1) = 2*P1(2:end-1);
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f = Fs*(0:(L/2))/L;
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plot(f,P1)
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client.close()
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