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

yes you are correct , you should use the passive x mode ; sorry for confusion ;

Thank you ,

Regards

Sree

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

    I generated in Passive Parallel x16 RBF, set MSEL DIP switch to all-ON as required by DE10-nano manual and I have the same situation: FPGA is loaded (orange LED is ON, green LEDs are blinking) but U-Boot complains about missing device tree:

    append: root=/dev/mmcblk0p2 rootwait mem=0x3F000000 memmap=16M$0x3F000000 ttyS0,115200

    ERROR: Did not find a cmdline Flattened Device Tree

    Could not find a valid device tree

    SCRIPT FAILED: continuing...

    reading /socfpga_cyclone5_de10_nano.dtb

    29940 bytes read in 9 ms (3.2 MiB/s)

    Also seems confusing to me that right after Did not find message there is reading /socfpga_cyclone5_de10_nano.dtb which means the device tree is really there on SD card.

    Another strange issue is that DE10-nano boots Linux with MSEL switch set to ON-OFF-ON-OFF which means Passive Parallel x32 mode but Quartus conversion program does not allow 32 bit mode showing the following error: Device 5CSEBA6U23 does not support Passive Parallel x32 scheme.