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FDC1004EVM: measurement issue.

Ray Vincent Aranzaso
Mastermind 18180 points
Part Number: FDC1004EVM
Other Parts Discussed in Thread: FDC1004

Hi,

Good Day. I have a customer who is currently working with FDC1004EVM. Please see below his query for your reference. Thank you very much.

I am using the FDC1004EVM board to measure from some capacitive sensors I have. I am using the Sensing Solutions GUI which supposedly can output 100 samples/second per channel if data is being collected from all 4 channels simultaneously. However, no matter how fast I make the measurement rate/sampling rate, the data is output sporadically and much much slower than 100 samples/second.
I had never tried logging the data before. I had previously only been using it to look at the data in real time on the GUI. The issue is not with the board itself, as it seems to record data fine. It's the GUI I think that is having problems since the data logging is not anywhere near fast enough.

Best Regards,

Ray Vincent

  • 0
    TI__Expert 7599 points

    Hello Ray, 

    The FDC1004 GUI is based on the USB communication. The GUI and the protocol used is not optimized for real time measurements. The reasons could be that there could be overhead in the CPU and the USB loading. 

    For any timing related measurements or need a better control over the samples we recommend that customers use their own firmware and capture the data using teh microcontroller. Let me know if this helps!