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jackhab's avatar
jackhab
Icon for Occasional Contributor rankOccasional Contributor
6 years ago

How to add pull-ups on DE10-nano GPIO

I'm trying to add weak pull-ups on JP7 GPIO1 of DE10-nano board.

The board boots to Linux so as far as I understand FPGA image is loaded by Uboot from the rbf file on boot partition.

There is a Default FPGA project provided with DE10-nano, however, GPIO pins are not assigned in this project.

What am I missing here? Is this the correct project? Which settings map between Cyclone pins and GPIO accessed by HPS and how to modify them to enable weak pull-ups?

Thanks

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  • SreekumarR_G_Intel's avatar
    SreekumarR_G_Intel
    Icon for Frequent Contributor rankFrequent Contributor
    6 years ago

    you can make sure board revision and the file meant for the board are same .

    Anyhow good news is you are able to boot it ; Now try modifying the working rbf design files and see any changes in the led.

    I cant say what may be issue until fully compare the hardware and the software built for it .

    Thank you ,

    Regards,

    Sree

    • jackhab's avatar
      jackhab
      Icon for Occasional Contributor rankOccasional Contributor
      6 years ago

      My board revision is C0 and I verified the CD package I downloaded matches the HW revision.

      What do you mean by " try modifying the working rbf design files"? If I try to modify Default Quartus project from the CD and create new RBF file it cannot be loaded by U-Boot.

  • SreekumarR_G_Intel's avatar
    SreekumarR_G_Intel
    Icon for Frequent Contributor rankFrequent Contributor
    6 years ago

    Sorry..I was in hurry..anyway what i mean is ..once you modify Default Quartus project from the CD and create new RBF file , Did you create the new uboot.img, preloader and other files .

    Thank you,

    Regards,

    Sree