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ryan_mlc

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    Is USB-DIO24 slower than PCI-DIO24?

    in Measurement Computing (MCC)

    Posted

    45 minutes ago, Fausto said:

    Hello @ryan_mlc.

    There is no clock on the PCI-DIO24 board nor on the USB-DIO24 Series.  The rates are system dependent and the USB bus is significantly slower that the PCI bus.  There is no way to speed it up.

    If your application requires faster rates, consider Digilent's Analog Discovery 2.

    https://digilent.com/shop/analog-discovery-2-100ms-s-usb-oscilloscope-logic-analyzer-and-variable-power-supply/

    Regards,

    Fausto

    Thanks for the info. We should probably try a faster computer than we are currently on.

     

    Also, do you have a product that is more focused on just GPIO controls? That device seems to have functions well beyond our needs and is short of the 24 DIO ports needed in our current project.

     

    Regards,

    Ryan

    Is USB-DIO24 slower than PCI-DIO24?

    in Measurement Computing (MCC)

    Posted

    On 10/12/2022 at 1:50 PM, craig.benson said:

    I also have a USB-DIO24 board and a PCI-DIO24 board that I am pulsing stepper motors with and the USB-DIO24 appears to be significantly slower.  While I understand there may be some software related dependency, it seems like the write times are significantly slower.

    Have you been to figure out if there is a way to speed it up?

    Is USB-DIO24 slower than PCI-DIO24?

    in Measurement Computing (MCC)

    Posted

    On 10/12/2022 at 1:50 PM, craig.benson said:

    I also have a USB-DIO24 board and a PCI-DIO24 board that I am pulsing stepper motors with and the USB-DIO24 appears to be significantly slower.  While I understand there may be some software related dependency, it seems like the write times are significantly slower.

    Glad we are not the only ones having this issue. Hopefully we can get a response from MCC Staff about this.

    @Faustoany input about this?

    Is USB-DIO24 slower than PCI-DIO24?

    in Measurement Computing (MCC)

    Posted · Edited by ryan_mlc
    Tagging a person

    @Fausto

    Nim is no longer working on this project so I may follow up with more information or questions in the future.

     

    But what we are doing is bit-banging SPI protocol on Port C of the DIO24. This has not been an issue with the PCI version but it's much slow after we have switched to the USB version.

     

    Thanks,

    Ryan

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