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Captured to What does the MSP430G2121 on the ADS1298RECGFE-PDK do? wiki page Recapture

ads1298r

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sravan jaini
Posted by
on Apr 23 2011 02:54 AM
Intellectual330 points

Hello,

I am Sravan, doing project using ads1298r.I am going to use lpc2478 to interface with ads1298.Is it is possible to connect ads1298r DRDY and start signals to GPIO of lpc2478?In lpc2478 there is spi interface but it does contain any drdy and start signals.why eeprom(24AA256-I/ST) is used in ads1298r board.Please help me in this regard.

Thanks,

Sravan.

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  • sravan jaini
    Posted by
    on May 04 2011 07:03 AM
    Intellectual330 points

    Hi Michael,

    Thanks for reply,but i want to use the respiration circuit on the ads1298r ece fe.If i dont use msp430  what type of  input i should give to U12 2nd pin  on page 2 of schematics.

    I am using lpc2478 arm controller instead of TMS320VC5509A i.e., i am not using mmbo board,there is a header J7 in sheet 5 of schematics page,what type of pins i have to connect to J7.2 and J7.3. from my lpc2478.

    Please help me in this regard.

    Thanks,

    Sravan.

     

    ads1298r
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  • Michael W
    Posted by
    on May 04 2011 10:43 AM
    Expert3285 points

    Sravan,

    Let me try to expand on Tom's previous post. The MSP430G2121 on the ADS1298ECG-FE board is there to help simulate respirations. It is factory programmed (through J7) to create a square wave of 0.1 to 0.5Hz. The frequency is selectable in the GUI as 0.1, 0.2, 0.3 (default), 0.4 or 0.5Hz. That signal is fed through JP36 to a comparator (U12 pin 2) and the output of the comparator drive the analog switch (U11). If you want to use your own signal generator to simulate respiration, you can apply a square wave to the SMA connector (J6) and move the shunt on JP36 to cover pins 2-3.

    The MSP430 is there only to help you evaluate the respiration function without having to connect additional test gear to the EVM. You do not need to put anything from your processor into J7. J7 is there to accommodate the Spy-Bi-Wire Interface of the MSP430G2121 only, which is how we programmed the device to generate the square wave mentioned above.

    Regards,

    Michael

    Regards,

    Michael W

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