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MSP430FR6047: Please help with the MSP430FR6047 for flow meter application

David Fosca
Intellectual 450 points
Part Number: MSP430FR6047
Other Parts Discussed in Thread: EVM430-FR6047, MSP-FET, CC3100BOOST

Hello, I am new at working with this kind of microcontrollers , I would like to know if there is any guide to use the MSP430FR6047 from scratch with the help of the datasheet of course. Also, do I need any other electronic component to work with this microcontroller if I just want to use it for ultrasonic purposes for starts?

  • 0
    TI__Mastermind 43970 points
    Hi David,

    The EVM430-FR6047 evaluation board is a good starting point. This design shows the external components required as well as example software for a typical water meter application. Please note that the EVM board does not include the transducers or pipe as this is typically specific to the customer.
  • 0 in reply to Eddie LaCost
    Intellectual 450 points
    Hi Eddie,
    Thanks for the reply.
    The thing is that I would like to go cheaper and avoid having to purchase the EVM board because of the 250$ that I cant afford for this project. Thats why I would like to learn how to use and program only the microcrontroller. I have been looking for information on how to program the MSP430FR6047 but I couldnt find any other information apart from the EVM board.
    So, is there a way to save some money and work with the MSP430FR6047 directly?

    pps: what are the recommended transducers ? (Audiowell?)

    Thanks!
    David
  • 0 in reply to David Fosca
    TI__Mastermind 43970 points
    David,

    In order to get accurate measurements, you will need design a PCB. The trace lengths for the USS CH0/CH1 in and out pins must be identical. The USS oscillator layout is also critical for good performance. Traces should be kept short and oscillator placed close to the IC.
    You could potentially save money by designing your own PCB and assembling the board yourself, but I would highly recommend starting with a known good board like the EVM. You can use the EVM as your guideline for designing your own PCB as well.

    The MSP430FR6047 can be programmed with spy-bi-wire or JTAG using the MSP-FET. The EVM already has this spy-bi-wire circuit integrated, so nothing else is required.

    Yes, for general purpose transducers that are widely available, the Audiowell 1MHz transducers are recommended and we have tested these in house with DN20 and DN25 type water pipes.
  • 0 in reply to Eddie LaCost
    Intellectual 450 points

    Hi Eddie,


    Thanks for the answer.

    Okay, I will buy the EVM board to try the ultrasonic transducers that I am buying from STEMINC. I want to meassure water flow through a pipe so I think the 2mm thick (1 Mhz) and 15mm radius transducer should do it. Should I take into another consideration?

    Also, if I want to use the board just with batteries, how should I program it so it will stay in low battery consumption mode?

    Last thing, if I want to transfer water flow meassurments from the board to a web server. What boosterPack could you recommend me? (like CC3100BOOST pack for example??)

    Thanks a lot,

    David.