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ads1299 eeg fe-kit for longtime data acquisition.

qi wang
Intellectual 480 points
Other Parts Discussed in Thread: ADS1299

Hi,

Is it possible to use this board to acquire data for 30minutes (low SR=250)?

It seems that the PC software tool let the on-board DSP acquire all the data, and then display the data in PC software. 

So there maybe 2 problems:

1) is it possible for the on-board DSP to store so many data and then transfer it to PC? 

2) We can not monitor the waveform in real time, becasue the data is updated only once on PC software, when all data is received. Right? How to solve this?

Thanks!

Best

  • 0
    TI__Mastermind 38745 points
    Hey Qi,

    The ADS1299EEG-FE is an evaluation module built to allow customers to evaluate the performance of the ADS1299 so that a designer can decide to place that IC in their system. It is not intended to be used in end equipment or for diagnostic purposes. As such it cannot be used to collect the quantity of data you wish to collect. It may be possible for you to change the EVM firmware and software to meet your needs, but TI will provide no technical support for such an endeavor.

    Regards,
    Brian Pisani
  • 0 in reply to Brian Pisani
    Intellectual 480 points
    Hi Thank you so much!

    I found there is SPI on ads1299. Can I use other boards with MCU to control the daughter board for long time data acquisition? It is not for commercial product.

    Thank you.
    Qi
  • 0 in reply to qi wang
    TI__Mastermind 38745 points
    Qi,

    Yes it is possible, but you are unlikely to be able to receive support should you run into issues.

    Brian
  • 0 in reply to Brian Pisani
    Intellectual 480 points
    Yes, I understand. Just 2 quick questions about the daughter board itself. (see figure 62: ECG MDK Board Interface Adapter, page49 of userguide SLAU443A)

    (1) J4: J4 provids power the the board. Vcc_5v and Vcc_3.3v are provided by the mother board to J4, right? I think other pins are useless even left floating.

    (2) J3: To monitor acquired data on the SPI interface using SPI, other pins can be floating, right? But what is the purpose of 'U10 24AA256-I/ST', which is an EEPROM with I2C interface?

    Thank you!
    Qi
  • 0 in reply to qi wang
    TI__Mastermind 38745 points

    Hey Qi,

    Yes, I believe you are correct on both things. I believe the EEPROM contains ID information used by the MMB0 board to identify which EVM is being used since the MMB0 serves as the mother board for multiple EVMs. It is not necessary if you wish to customize your setup, though you may find it convenient for any reason (it is non-volatile).

    Regards,

    Brian Pisani

  • 0 in reply to Brian Pisani
    Intellectual 480 points

    Thank you!


    Just to make sure my J4 connection is correct, to prevent the damage of the power supply to the daughter board.

    (1)pin10: 5V

    (2)pin9: 3.3V

    (3)pin5: GND
    (4)other 7 pins: floating 

    Am I correct?

    Thanks.

    Qi

  • 0 in reply to qi wang
    Intellectual 480 points
    By the way, are the pin10 (J3, AGND) and pin 5 (J4, gnd?) connected together ? I mean, if digital GND and analog GND are directly shared? (no decoupling etc.)

    Thanks!
    Qi
  • 0 in reply to qi wang
    TI__Mastermind 38745 points
    Hey Qi,

    If you look on that page at R74 you will see that analog and digital ground are tied together at that point since R74 is a 0 Ohm resistor.

    Brian