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Showing results for tags 'record'.
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Just recorded some logic data using my new Analog Discovery 2 on my Mac. Now I want to zoom in and look at the data. According to the tutorial there is suppose to be a "hot track" button that lets you zoom in but I don't see any such feature. So how do you zoom in? I attached a screenshot if it helps.
Hi I am using analogIN record for acquisition of the signal. The problem I encountered is the fact that the acquired signal is randomly delayed in with repetition of the measurements. (see fig attached, where a same measurement is performed several time. Starting point always differ). Is there a particular reason for it and is there an elegant solution except the dirty one which compares delays of different measurements and performs the delay shift operation. Many thanks in advance. I used AnalogIn_Record.py from the example library and analog discovery 2. thanks & cheers, m
I am a bit confused, in the following example i am using continiously the record mode and programmed a time.sleep(0.1) in my aquisition loop. So i would expect the new aquired samples should be the whole buffer size (nsamples = 15000) because there should be 50000000 new samples/s. But actual it is variating between ~150 -~ 8000 per loop. What i am doing wrong? #set samplerate libdwf.FDwfAnalogInFrequencySet(hdwf, c_double(50000000)) #set up acquisition libdwf.FDwfAnalogInChannelEnableSet(hdwf, c_int(0), c_bool(True)) libdwf.FDwfAnalogInChannelRangeSet(hdwf, c_int(0), c_double(5)) libdwf.FDwfAnalogInAcquisitionModeSet(hdwf, c_int(3)) #record libdwf.FDwfAnalogInRecordLengthSet(hdwf, c_double(0)) #wait at least 2 seconds for the offset to stabilize time.sleep(2) #begin acquisition libdwf.FDwfAnalogInConfigure(hdwf, c_int(0), c_int(1)) cSamples = 0 nSamples = 15000 for i in range(100): rgdSamples1 = (c_double*nSamples)() rgdSamples2 = (c_double*nSamples)() libdwf.FDwfAnalogInStatus(hdwf, c_int(1), byref(sts)) if cSamples == 0 and (sts == DwfStateConfig or sts == DwfStatePrefill or sts == DwfStateArmed) : # Acquisition not yet started. continue libdwf.FDwfAnalogInStatusRecord(hdwf, byref(cAvailable), byref(cLost), byref(cCorrupted)) cSamples += cLost.value if cLost.value : fLost = 1 if cCorrupted.value : fCorrupted = 1 if cAvailable.value==0 : continue if cSamples+cAvailable.value > nSamples : cAvailable = c_int(nSamples-cSamples) # get samples1 libdwf.FDwfAnalogInStatusData(hdwf, c_int(0), byref(rgdSamples1, 8*cSamples), cAvailable) results = np.array(rgdSamples1) XX = results[np.nonzero(results)] print(len(XX)) time.sleep(0.1)