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TDC1000-TDC7200EVM: Battery-powered and automatic measurement

user5034239
Prodigy 30 points

Part Number: TDC1000-TDC7200EVM

Hi:

I have two questions related to the TDC1000-TDC7200EVM BOARD.

I connected it to an arduino mega, and I can read the data from the board :) But now I want to use a battery to power the board and I could not find a way. I even tried to connect the arduino 5v output to the J6 USB 5v, but there was no effect. Is it possible?

My second question is related to continous monitoring. I modified the firmware to read data regardless usb connection and send it to uart all the time. That works at the beginning but stop working after a couple of seconds. Any ideas? I can send you my firmware code if needed.

Thanks,

--Gonzalo

  • 0
    TI__Mastermind 31655 points
    Hello Gonzalo,

    The USB_5V is the output of a regulator on the board. The best place to connect the power would be to the USB side of C22 (Vbus).

    Are you talking about the MSP430 firmware? Or is this firmware from the arduino? When reading the output of the TDC7200 you need to wait for the INTB trigger, otherwise reading the registers during the measurement will cause problems and result in bad measurements or nothing.

    Regards,