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Interface TRF796x series RFID readers with MSP430 launch pad

KEERTHI G
Expert 2610 points

Hi friends, 

I want to read some information from RFID tag and display in UART using MSP430 launchpad.

I wish to use below launchpad.

(MSP-EXP430G2 LaunchPad)

link: http://www.ti.com/ww/en/launchpad/launchpads-msp430-msp-exp430g2.html#tab

Is it possible? 

If so means, How can I interface TRF796 reader IC with MSP430 launchpad. (SPI communication)

 

Please guide me. 

Regards, 

Keerthi G.

  • 0
    Expert 2610 points

    Hi, 

    Anyone please reply this post. 

    May I interface MSP430 launch pad in previous post with below Mifare RC522 RFID 13.56Mhz Proximity Card Reader/ Writer Module? 

    Please see this link: http://www.ebay.in/itm/Mifare-RC522-RFID-13-56Mhz-Proximity-Card-Reader-Writer-Module-with-RFID-keyfob-/171389275429?_trksid=p2054897.l5662

    Please reply above and this post. 

    Regards, 

    Keerthi G

  • 0 in reply to KEERTHI G
    Expert 1595 points

    Hi,

    With a quick look at the datasheet for the RC522 chip is shows that it will operate with either SPI or I2C.

    The MSP430G2x13 that operates with the launchpad has USCI_B0 which supports SPI or I2C so the processor should be able to communicate with the chip. The processor also has UCSCI_A0 which support UART, so you will be able to use UART to display the data.

    It looks like the LaunchPad only gives a low level UART output so you may need extra hardware depending what your display interface is.

    In principle these devices will do what you need but you will need to study the datasheets to be sure you connect them correctly and then develop the required software.

    Roy

  • 0 in reply to Roy Deabill
    Expert 2610 points

    Hi Roy,

    Thanks for your reply. 

    1) I read the data from tag and displayed it in PC using UART. 

    Can I do with Launchpad? 

    2)Launchpad has many GPIO. May I connect any other devices using that. 

    3) What is meaning of booster pack?  That launchpad has 20 pin booster pack. I read some documents. But I can't get that. 

    Regards, 

    Keerthi G.

  • 0 in reply to KEERTHI G
    Guru 227245 points

    1) Sure you can do. I actually do something like this myself: I have an RF reader that auto-scans for tags and returns the tag ID, if found, through RS485. The MSP in the device takes this, adds some A/D conversion results and outputs the whole as a human-readable string through RS232.

    2) Sure. Not only GPIO but also A/D inputs. If you don’t need the pin for SPI, I2C or UART, you can use them for anything else. Note that SPI and I2C are a bus, so you may attach multiple devices to them. For SPI, each device needs a separate I/O for addressing, on I2C, addressing is done over the bus.

    3) ‘booster pack’ is just a definition of the headers (where is VCC, GND and where are the I/O pins).
    Different booster packs have the same header, expect VCC and GND at the same pins and use one of the other pins for connecting their functionality. There are booster packs with display, with touch sensors, even with an MP3 player. However, they are just add-on boards using a standardized connector.

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