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Connect LCD output display to TDC1000-TDC7200 EVM

Martin Murawiecki
Prodigy 90 points
Other Parts Discussed in Thread: TDC1000

How do you connect an LCD display to the TDC1000-TDC7200 EVM for it to display the level in a tank? what equipment/programs are needed?

Also would it be possible to take a value X away from the time of flight value being transmitted before the time of flight value is converted into a level (in millimeters/meters)?

  • 0
    TI__Expert 4725 points

    Martin,

    The present TDC1000-TDC7200 EVM GUI already has the capability to convert a TOF measurement into a distance. See below:

    Once you enter the Speed of Sound in the box (circled above) the distance is displayed in meters. You can set the diplay range by changing the red circled graph limits as well.

    LCD-wise that really depends on your skill set. You could connect a LCD display with an UART interface to the board and reprogram the MSP430 to output distance data to the display. At present the MSP430 will output TOF data from a pair on pins on the EVM. You would need to reprogram the MSP430 to output distance calculations vs. TOF data.

    Good luck, 

  • 0 in reply to Matthew Minasi
    Prodigy 90 points

    Thanks for the information, I would be interested in connecting an LCD display through an UART interface, are there any TI technical notes on how to do this?

    Also is the source code for the MSP430 available so that I would be able to reprogramme it? Do you know the limitations of what you are able to do with the TOF data that is currently output from the pins on the EVM? as I would want to minus a certain value X from the TOF data before the distance calculation is performed

    Thanks.

  • 0 in reply to Martin Murawiecki
    TI__Mastermind 21685 points
    Martin,

    I am aware of a segmented LCD used in the following two designs

    www.ti.com/.../msp-exp430fr6989

    www.ti.com/.../TIDM-ULTRASONIC-FLOW-TDC

    Also, we interfaced an I2C LCD in the design below

    www.ti.com/.../TIDA-00824

    I don't have immediately an UART LCD to recommend.

    Regarding MSP430 source code, it is available as part of the TDC1000-TDC7200 GUI installation. If you install the GUI from our website, you can find the EVM firmware source code zip in the following install folder

    C:\Program Files (x86)\Texas Instruments\TDC1000_7200EVM\Firmware

    The firmware does only the TOF calculation and sends it to UART port. You can modify it as needed.

    Thanks,
    Vishy