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MSP-EXP430G2: Can't read the nfc tag through the docklight

Thanos Pr
Intellectual 440 points

Part Number: MSP-EXP430G2

Hello,

I have the msp-exp430g2 ( Revision 1.5) and DLP-7970ABP.

I have programmed the mcu ( msp430g2553) via Uniflash with the TRF7970ABP_RFID_Reader_Demo.out file.

I cant read the data through the docklight in spite of doing the right parameters in the com's. ( Like Flow control Hardware, Baud Rate 9600..)

I have tried to connect the mcu with an external usb to uart and i can get data.

What i have to do to get the same data with the on board usb in the launchpad?

  • 0
    TI__Guru*** 128125 points
    Hello Thanos,

    I think I already address your question with this post: e2e.ti.com/.../2192902

    For UART, make sure to follow the steps on "MSP-EXP430G2 Hardware Configuration" on the E2E post about the firmware: e2e.ti.com/.../493678
  • 0 in reply to Ralph Jacobi
    Intellectual 440 points
    I get the same condition, DLP-7970 detects my tag ( the green led in the board blinks) but i cant get data via docklight terminal.

    Could you please help me?

    Thanks in advance.
  • 0 in reply to Thanos Pr
    Intellectual 440 points
    I have set the communication settings as the documentation is written. More specifically, baud rate =9600, 8, None, 1. I can get data by taking the rx from msp430g2553 and connecting this to an another uart to usb but not from the on board mini USB.
    First of all, with the recommended firmware version uploaded on my msp-exp430g2 board, the heartblink led (LED1) isnt flashing at all. Only the led2 is flashing if i put the jumper on it.
    There is a possibility that i have to load a different firmware?
  • 0 in reply to Thanos Pr
    TI__Guru*** 128125 points
    Hello Thanos,

    I was going through my workflow and just realized that my reply to you somehow did not get sent out correctly. I apologize for that.

    There is no heartbeat LED with the firmware anymore, it was removed due to disrupting debug for users as noted in the Update Notes on this post: e2e.ti.com/.../493678

    One of the SPI pins is shared with LED2, and the TRF7970A depends on SPI communication and therefore will not function when the jumper for P1.6 is placed. So whenever you place that jumper and see the green LED blink, it is expected nothing will work.

    The E2E post I linked above has an image of the G2 LaunchPad which shows the correct jumper configurations for the LaunchPad.

    Once you have that setup, and plug the DLP-7970ABP on top, what you can do before trying to get into the UART terminal is try to read a tag. The LED's on the BoosterPack should light up for the corresponding tag type. This will let you know the firmware is working correctly and that it can see tags.

    Then you can try getting the UART terminal software going. Make sure to rotate the jumpers for RXD/TXD as seen in the LaunchPad image. Also please try baud rate 112500, not 9600.