Can I simply solder a ADS1299-4PAGR to get fewer channels?

GEngGEng
in Build-it-yourself

Hello,

I have developped my own board that uses the OpenBCI firmware to control the ADS1299IPAGR.
Since I need just 4 channels, to reduce cost, can I simply solder the ADS1299-4PAGR in that board with circuitry and OpenBCI firmware to control the ADS1299IPAGR?

There is some consideration that I must take into account to do that work?

Thanks in advance.
Geraldo Gomes.

Comments

  • wjcroftwjcroft Mount Shasta, CA

    Geraldo, hi.

    There may be minor differences in the various ADS1299* datasheets. So the firmware source code possibly would require minor tweeks to run. Suggest you do a visual 'diff' operation between the register listings shown in the datasheets, to locate any small differences.

    Regards, William

  • GEngGEng

    Hello William,

    Thanks for your repply!
    The datasheet is the same for the both chips, so I think the registers are the same.
    I'm wondering how the firmware works, for example if it waits the data of 8 channels to make a packet
    and the chip only offer 4 channels, the firmware will wait forever the data of 8 channels to end a packet?
    There is documentation to understand the firmware?

    Greetings,
    Geraldo Gomes.

  • wjcroftwjcroft Mount Shasta, CA

    Sorry, I assumed you realized that you will at minimum, need to modify the firmware to read less channels from the 4 channel ADS1299. If you confirmed the datasheets have no other differences, then that is great.

    Since the packets contain 8 channels, you would just be setting the other 4 channels to zeros.

    I assume you know that the RFduinos are at EOL End of Life, so no longer stocked. The packet size was determined based on BLE radio packet limitations.

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