• TI Thinks Resolved

TSC2017EVM: TSC2017EVM and TSC2017EVM-PDK

Part Number: TSC2017EVM

Hello,

I'm using the  and TSC2017EVM and TSC2017EVM-PDK to record a subject finger touch in the MRI room. I need a very low current touch screen controller. I'll place the TSC2017EVM close to touch panel but far from the TSC2017EVM-PDK (USB-MODEVM Interface). I'll use some cables (2-3 m lengths)  to plug the 3 connectors in the 2 boards. My question is how far can I place one board from the other to be sure the data can be reading and recording well?

In order to read and record the touch point from the TSC2017EVM, by a PC far from the touch panel, do you have the other solution/suggestion?

Thanks,

  • Hi Leila,

    Welcome to E2E, thank you for your interest in our products.
    If I understand you, these cables just transfer digital information, if so, I don't think that you have any problem with your application.
    But if these cables transfer analog information, you should take into account that the analog interface should be kept as short, as simple and as secure as possible because resistive touch screens have fairly low resistance. Longer connections can't only bring in possible pigtail resistance between the TSC and the touch screen, but also increase the chance for noise, ESD and other interferes to affect the analog input lines.

    Best Regards
    José Luis Figueroa
    Application Engineer
  • In reply to José Luis:

    Thanks José for your answer.

    An other question, do you another Touch screen controller for restive panel (4 or 5 wore) with lower current during active period (sensing touch)?

     Best Regards,

    Leila

  • In reply to HardWareAsk:

    Hi Leila,

    You could have a look at the following devices: TSC2014, TSC2007 and TSC2004. They could fit in your application.

    Best Regards
    José Luis Figueroa
    Application Engineer
  • In reply to José Luis:

    Hi José

    Finaly I decided to use TSC2017, it works well. I would like to put my PC far from my USB-MODEVM Interface. And I also need 2 modules be electrical isolated. So I'm thinking to use the optical fibre and two modules to convert USB to Fibre optic and Fiber Optic to USB.

    Do you have any advice/command or device to suggest?

    Thanks,

    Leila 

  • In reply to HardWareAsk:

    Hi Leila,

    You should post your questions about this at the USB or Fiber communication forums. Here they should be able to help you in a better way.

    Best Regards
    José Luis Figueroa
    Application Engineer
  • In reply to José Luis:

    Ok, Thanks,

    Leila

  • In reply to José Luis:

    Hi,

    Whats is the data rates of the USB-MODEVM interface? I didn't find in the TSC2017EVM-PDK user's guide.

    Thanks,

    Leila

  • In reply to HardWareAsk:

    Hi Leila,

    The TSC2017EVM-PDK uses a TAS1020B to perform the communication between the PC and TSC2017. You should review the datasheet of the TAS1020B in order to find this information.

    Best Regards
    José Luis Figueroa
    Audio Applications Engineer
  • In reply to José Luis:

    Hi José,
    Another question, I need to read the touch coordinates in real time and process them in Matlab or Python.
    Do you Know, how I can do ? I mean how can I access to x, y data in (almost) real time?
    Best Regards,
    Leila
  • In reply to HardWareAsk:

    Hi Leila,

    This device can be used in real-time applications according to the timing requirements, but that depends on how the controller works with the TSC2017. Unfortunately, We just have the firmware on C++ to handle this device.

    Best Regards
    José Luis Figueroa
    Application Engineer