BlueSky

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  1. BlueSky

    Digital Discovery Buffer size, Compression

    Hi @attila 1) Maybe "64M*32 = 256Mbits" is not correct or Am I misunderstanding? I know that Digital Discovery has the 2G DDR for Logic Analyzer sampling buffer. 64M(2^26 = 67108864) x 32 channels = 2,147,483,648(2G bits) 2) Does FDwfDigitalInBufferSizeInfo() always return the same value of 64M? DWFAPI BOOL FDwfDigitalInSampleFormatSet(HDWF hdwf, 8); <------- 8 bits FDwfDigitalInBufferSizeInfo(HDWF hdwf, int *pnSizeMax); ===> I get 64M(2^26 = 67108864) from pnSizeMax. -------------------------------------------- DWFAPI BOOL FDwfDigitalInSampleFormatSet(HDWF hdwf, 32); <--- 32 bits FDwfDigitalInBufferSizeInfo(HDWF hdwf, int *pnSizeMax); ===> I get 64M(2^26 = 67108864) from pnSizeMax.
  2. Hi attila I do not find the usage of in WaveForms™ SDK Reference Manual(Revised August 8, 2018) With the newest Waveforms 3.9.1. (Maybe there is not the explanation of FDwfDigitalInStatusNoise2(), Please check) What is the contents of "rgdwNoise"? Does rgdwNoise have the count of noise occurring between sampling clocks?
  3. BlueSky

    Digital Discovery Buffer size, Compression

    Thank you for a good reply! I used FDwfDigitalInSampleFormatSet() to set 8, 16, 32 bits channels, But FDwfDigitalInBufferSizeInfo() answer that the buffer size always 64Mbits.... The sequence is that First call FDwfDigitalInSampleFormatSet() and then read FDwfDigitalInBufferSizeInfo(). Could you repair my ambiguous thoughts?
  4. Hi I thank you for making a good product. Could let me know How to get the sampled data from Digital Discovery when DwfDigitalInSampleModeNoise is used in FDwfDigitalInSampleModeInfo()? From WaveForms™ SDK Reference Manual DwfDigitalInSampleModeNoise: Stores alternating noise and sample values, where noise is more than one transition between two samples. Which function is used when I get the data from Logic analyzer if alternating noise and sample values is saved,? Should I refer to the the function like FDwfDigitalInStatus() & FDwfDigitalInStatusData() in DigitalIn_Record.py & DigitalIn_Acquisition.py?
  5. On Digital Discovery, When using Waveforms SDK. Could let me know the answer as following questions? 1) Does Digital Discovery logic analyzer have the same buffer size Always in 8, 16, 32 bits? FDwfDigitalInSampleFormatSet() 8, 16, 32 bit I found out the buffer size using FDwfDigitalInBufferSizeInfo(), One channel buffer size is 64 Mbits(64 x 1024 x1024). Whenever I select 8 channel( not 32 channel), Is the buffer size is the same ? 2) How long is the real transferred data width? 8, I saw the usage of dwf.FDwfDigitalInSampleSensibleSet from DigitalIn_Record_Compress.py # enable data compression by select used lines When I use dwf.FDwfDigitalInSampleSensibleSet(hdwf, c_int(0x11111110)), Whic is the right FDwfDigitalInSampleFormatSet(hdwf, c_int(32)) Ordwf.FDwfDigitalInSampleFormatSet(hdwf, c_int(8)) 3) What does the compression mean?