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Zedboard does not boot the Linux from SD-card

100jade

Hello,

my Zedboard does not boot the Linux from the SD-card. It just loads U-Boot and prompts "zed-boot". I have to call "boot" to load Linux. As far as I can tell the jumpers are set correct.

JP7 is on SIG/GND
JP8 is on SIG/GND
JP9 is on 3V3/SIG
JP10 is on 3V3/GND
JP11 is on SIG/GND

JP18 is on 2V5

I have a jumper on JP6

Though I think my board is missing one jumper. On many pictures I see boards that have jumper on the inner pin of JP3.

What is the problem here?

Is it necessary to have the PC connected via UART/JTAG to boot Linux?

Best
Jan

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  • 0

    Hello Jade,

    Based on the setup you provided, you are in SD boot, so that should not be a problem. As far at the JP3 jumper, on my setup goes, I do not have any jumper either so that should not be an issue as well. You do not need to have the PC connect via JTAG to do a SD boot of Linux. However I would suggest you plug your PC into the UART micro USB connection on Zedboard so you can monitor what is going on via a terminal program.

    My questions for you are which linux are you running? Are you running the preloaded linux image that we preload into the sdcard that comes with your Zedboard? Or is it a petalinux/pulsar Linux of some sort? Also try running through the "Zedboard Getting Started Guide" to see if you missed anythign during your setup process.

    http://zedboard.org/support/documentation/1521

    --Josh

  • 0 in reply to jafoste4

    Hi Josh,

    thank your for your answer. Regarding your question: I use the preloaded Linux image that comes with the Zedboard. I'm currently reading the Getting Started Guide.

    There is more strange behavior with my board. I use Ubuntu 16.04 LTS on my workstation. I chose that distro/version because it is officially supported by Xilinx for Vivado. I also installed the cable drivers. Still I can not use /dev/ttyUSB0 to connect to the board via UART. I can only use /dev/ttyACM0. Though /dev/ttyUSB0 does exist and I can connect, but there is no output from the board. Connecting with /dev/ttyACM0 always ends up at the zed-boot prompt where I have to run "boot" to load Linux.

    My guess is that I have more than one problem here. Is it possible that U-Boot is not correctly configured on my board? Can you tell me what I can do to configue U-Boot such that it automatically loads Linux?

    What can I do or check regarding the USB problem?

    Best
    Jan

  • 0 in reply to 100jade

    Hello,

    regarding the ttyUSB0/ttyACM0 problem: I think my expectation was wrong here. The board works correct. The ttyUSB0 seems to be reserved for JTAG. I was used to another board where I can use ttyUSB0 for UART.

    Best
    Jan

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