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228 WM-OM-E Rev I

// if the client app. was run before the scope then these events will be created,

// if the scope was run first then these events

// will just be opened

HANDLE m_hDataAvailable = CreateEvent(NULL, FALSE, FALSE /* initial state */,

szMutexDataAvailableName);

HANDLE m_hProcessingComplete = CreateEvent(NULL, FALSE, FALSE /* initial state */,

szMutexProcessingCompleteName);

if(m_hDataAvailable == 0 || m_hProcessingComplete == 0)

{

printf("Unable to open events\n");

return 0;

}

// main loop

while(1)

{

int i = 0;

printf("Waiting for new data...\n");

// wait an infinite amount of time for data to be available

DWORD waitSuccess = WaitForSingleObject(m_hDataAvailable, INFINITE);

// print the first few bytes of the input waveform

CDescHeader *descHeader = (CDescHeader *) &m_lpMMFile[0];

short *m_lpWaveform = &m_lpMMFile[descHeader->headerSize / sizeof(short)];

for(i = 0; i < 4; ++i)

printf("%f ", (m_lpWaveform[i] * descHeader->verGain) +

descHeader->verOffset);

// compute the mean of all data values, while computing the abs value of the waveform

//in-place

double sum = 0.0;

for(i = 0; i < descHeader->numSamples; ++i)

{

sum += (m_lpWaveform[i] * descHeader->verGain) + descHeader->verOffset;

m_lpWaveform[i] = abs(m_lpWaveform[i]);

}

sum /= descHeader->numSamples;

// modify the output units, set to Amps

strcpy(descHeader->verUnit, "A");

// print the mean, numer of samples, trigger time in seconds, and the segment index

printf(" (%f) %d %d %d\n", sum, descHeader->numSamples, (int)

(descHeader->trigTime / lecTimeStampOneSecond), descHeader->segmentIndex);

LeCroy WavePro 7300A User Manual

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