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MSP430FR2633: Calibration function for the metal touch solution on MSP430FR2633

Nomo
Guru 16800 points
Part Number: MSP430FR2633

Hello,

Please let me know whether MSP430FR2633 have the calibration function for the metal touch solution.
If the metal surface is distorted by a strong power, in case of metal touch solution, the captivate may cause the failure detection.
So, I think the calibration is needed every detection or power-on reset.
Do you have these functions?

Best Regards,
Nomo

  • 0
    TI__Genius 17960 points
    Hello Nomo,
    many thanks for your inquiry. There are multiple comments to make on the topic you've raised.
    Please let me start with useful documentation.
    The basic one would be the Technology Reference Guide for CapTIvate software-dl.ti.com/.../index.html
    In this document you can find a lot of information about the implementation of calibration with CapTIvate.
    The other document, which should be of interest for you is a dedicated application report on capacitive touch interface with metal overlay www.ti.com/.../slaa811a.pdf
    In this document you will find information also related to the point you raised, means on noise immunity and protection against it.
    As stated the Technology Guide will give you more details about calibration, but as a short and initial answer on this topic, the default procedure in the Code, generated by the CapTIvate Design Center is to calibrate on one hand on every power on reset the touch interface, and on the other hand to re-calibrate during operation, if enabled in regular intervals.

    Best regards
    Peter
  • 0 in reply to Peter Spevak
    Guru 16800 points
    Hello Peter-san,

    Thank you for your reply.
    I'll check your advice.

    Best Regards,
    Nomo
  • 0 in reply to Nomo
    TI__Genius 17960 points
    Hello Nomo-san,
    it seems your problem is solved, thus I am closing the thread. In case you should have additional questions, please open a new thread. Many thanks for using our E2E forum.

    Best regards
    Peter
  • 0 in reply to Peter Spevak
    Guru 16800 points
    Hello Peter-san,

    Thank you for your message.
    It's no problem to close the thread.
    In case I have additional question, I'll open a new thread.

    Best Regards,
    Nomo

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