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7" Zed Touch Display Kit multi-touch capability

Former Member

Hello everybody,

I am interested in the Zed Touch Display Kit, but I found an surprising fact - tech sheet states it's only single-touch.

Is it really true? Or, is there any way of getting multi-touch capability from the Kit?

Regards,
Peter

  • 0

    Hi Peter,

    Although the Cypress TMG120 controller used on this touch display kit is technically capable of detecting more than a single touch, the touch controller on the flex tail has been tuned to support only a single touch with this PCAP sensor.  We focused instead on implementing other features such as water droplet rejection, glove usage, and noise immunity.

    The Zed Touch Display Kit was targeted at embedded industrial applications and although we provide a reference design to show the touch screen working with Ubuntu Linux, it is designed to not rely upon a full OS running on the processor.  This was also one of the motivations for moving to an I2C host interface rather than use USB like so many other touch controllers on the market currently support.

    Implementing multi-touch support is relatively complicated and would likely require the use of a full OS (such as Linux, Android, or Windows 8) to implement especially if the host interface were USB.  When we originally looked at adding a touch display, Linux had limited support for multiple touch devices.  According to this article, it looks like additional multi-touch support was added a few releases ago:

    http://stackoverflow.com/questions/16976512/does-linux-support-multi-touch-screen

    Can you please describe your application further and tell us some more detail on why the multiple touch capability is needed?  Feel free to private message me if you necessary.

    If you are looking for multi-touch support, Avnet has a number of other touch sensors on their line card which support multiple touch.  One of those suppliers is Panjit Touch Screens:

    http://www.em.avnet.com/en-us/design/linecard/Pages/PanJit-Touch-Systems.aspx

    Regards,

    -Kevin

  • 0

    Hi,
    We already bought from you Avnet ZEDBOard, but we'll get 7" ZED Touch Display Kit in february only!
    Is it possible to use a replacement Touchscreen from the market? Please recommend us such Display. We have to present the pre-prototype on 30 december!
    Thank you for your assistance.
    Ion Constantinescu

  • 0

    Hello Mr Kevin,
    So I mentioned in my precedent message, our team needs of Capacitive Touchscreen Display, to be connected to ZEDBOARD, but so we seen in your offer,we will receive the 7"zed touch display kit in February 2015 only, and the intermediate termen of our project that is at the final of December 2014, will be compromised. Our project isn't for industrial field, but in the educational field, for the children from 1, 2 classes and I suppose that we can renounce to the Avnet Projected capacitive Touch Overlay and to buy only Sharp LCD, ALI3 Sharp 7 Adapter, ZED LCD Interface to can present our project before to December 30. Is it realistic my proposal? What more things need us to succeed in our intent?

    Thank you for your help.
    Ion Constantinescu

  • 0

    Hello Mr. Kevin,

    I since hope to get from you an answer to my questions posted here on 03.12.2014 and 04.12.2014
    Thank you very much,
    Ion Contantinescu

  • 0

    Hi Ion Contantinescu,

    I will contact you directly to see if there is anything that we can do to accommodate your request.

    Regards,

    -Kevin