[NFC] How to connect TRF7970A NFC device to any of the OMAP development platforms (like Beagleboard, OMAP3XX EVM, OMAP4 Panda board etc)?

Hi,

Does anybody know how to connect TRF7970A NFC device or any other NFC controller  to any of the OMAP development platforms (like Beagleboard, OMAP3XX EVM, OMAP4 Panda board etc)?

The main requirement is to study in detail about the porting of non NXP NFC controller hardware on Android and NFC HCI interface. I am only interested in evaluation modules which have connectivity over serial bus protocols like SPI/UART/I2C etc and this requirement rules out TRF7970A Evaluation Module (EVM), which provides connectivity over USB.

Please comment on the below queries.

1. Availability of add on card/module based on TRF7970A NFC controller that can be connected to any of the available OMAP platforms over serial protocol bus like SPI/UART/I2C.

2. Is it possible to glue wire and take out SPI connection between the TRF7970A NFC controller and MSP430F2370 micro controller, so that TRF7970A can be connected to any OMAP evaluation boards.

Regards,

Sreenath

 

12 Replies

  • Sreenath -

    yes - if you have a look at the attached schematic, on the TRF7970A EVM, just like the TRF7960EVM, you can use header 5 to wire in your microprocessor for SPI or Parallel. Header 1 and Header 3 have the data clock and IRQ pins you also need to access and you would also need to wire in to the top of R24 for the EN line. Boards have been shipped to the eStore and should show up in stock in a few days at the latest. so you can go ahead and order.

    https://estore.ti.com/TRF7970AEVM-TRF7970A-Evaluation-Module-P2586.aspx

    1803.TRF797x_EVM_Rev A1_Schematic.pdf

    BR-

    Josh

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  • In reply to Josh Wyatt:

    Thanks a lot for the information.
     - What is the voltage level of the SPI interface between TRF7970 and MSP430F2370? Is it 1.8V or 3.3V?
     
    - Is there any Linux driver available for TRF7970? If yes what are the physical buses it supports (like, SPI, UART, I2C etc.)?

  • In reply to Sreenath Sharma:

    Sreenath -

    the voltage level on the I/O can be from 1.8 to 5V. Common use case for example is 3.3VDC and can be taken care of by connecting VDD_X (output) to VDD_I/O (input), and the output of VDD_X is programmable via Register 0x0B, and as VDD_I/O can be connected to external voltage level between 1.8 to 5VDC, this is also another way to handle the I/O voltage level setting. (this is identical to the way the TRF7960 and -60A are)

    We have a team internal to TI who has developed the Linux driver using SPI interface. As they have just completed it, it is not quite ready for distribution, but we will make that available when it is ready.     

    BR-

    Josh

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  • In reply to Josh Wyatt:

    Josh,

    Is there any way I can get a preliminary version of the driver for Linux.  I am trying to finish up hardware configuration requirements  using 7960 in Android Froyo.

  • In reply to Chris Westervelt:

    Hello  Josh,

    Do you have some news from this driver ?

    I am interested to use this chip with an OMAP based board. This board will of course run Linux and I will be really happy to have your driver.

    Thanks in advance

    Patrick

  • In reply to Patrick Gerber:

    Hi Josh,

    Do we have a rough date that the driver will be ready? Besides Linux, will TI be releasing drivers that support WinCE6/7 and Android?

    Regards,
    Poh Leong

  • In reply to Poh Leong Ng:

    Poh -

    The code should be available shortly for the new AM3715 flashboard. it is being finished right now and they are very close to being done. i will try to come back to you on this shortly with a link to that.

    BR-

    Josh

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  • In reply to Josh Wyatt:

    Josh Wyatt

    Poh -

    The code should be available shortly for the new AM3715 flashboard. it is being finished right now and they are very close to being done. i will try to come back to you on this shortly with a link to that.

    Hi Josh:

    Does the code work for TRF7960 as well? 

    Thanks

    Kevin

  • In reply to Patrick Gerber:

    Any news on the TRF7970A Linux kernel driver? Looking in the mainline there is a driver for the NXP PN533 & PN544 under the NFC subsystem.

    thanks,

    Paul

  • In reply to Paul Thomas:

    I would also be very interested in getting access to such a driver. We are currently evaluating whether to use the TI or the NXP Chip and the only reason keeping us from going with TI at the moment is the lack of such a driver. 

    I looked at the flashboard website but the currently release still says it does not support NFC yet. 

    Even if the driver is not finished, I would be willing to use anything that is available as a starting point and provide improvements that we might make.

    I would very much appreciate a response with more information on the availability of such a driver.

    Thanks!