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Configuring Minized Petalinux Wi-Fi with custom PL

caheike1

I programmed my logic into the PL on a minized and using the petalinux tools configured a 4.9 version of petalinux for it.  Linux and the PL work well, except networking.  The wifi.sh script that came with the minized does a ‘modprobe bcmdhd’.   This appears to be a custom kernel module that contains the Wi-Fi drivers.  I am unable to find the source for the module so that I can build it myself  or to configure the kernel to support this Wi-Fi chip without the module.  Also,  I would also like to get a copy of the configuration files for the petalinux kernel and rootfs that matches the image.ub that comes with the board so that I can create my own image.ub using my version of the PL.   Has anyone successfully built a petalinux image.ub and gotten Wi-Fi to work?    Does anyone know where to get the stock petalinux configuration files?

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  • 0

    On the MiniZed page (http://zedboard.org/product/minized) under Reference Designs you will find the PetaLinux 2017.2 BSP.

    If you create a new project with

    petalinux-create -t project -n minized -s MiniZed.bsp

    you will be able to build this with petalinux-build and the latest image.ub will be created.  This is the image.ub that goes on the MiniZed eMMC, from where it gets loaded after booting from QSPI flash.

    Under PetaLinux 2016.4 we used bcmdhd and you had to modprobe it.  If you build your project from the 2016.4 BSP, you will still have to do that.  But under PetaLinux 2017.2 (Linux version 4.9.0-xilinx-v2017.2) and later Wi-Fi support is with brcmfmac and not bcmdhd anymore and a modprobe by the user is not required anymore.

    You can establish which version of Linux you are running on MiniZed (and when it was created) with:

    cat /proc/version

    In the 2017.2 BSP, the user scripts such as wifi.sh are in the

    project-spec/meta-user/recipes-modules/custom/custom

    directory inside the project.

  • 0 in reply to stefanrousseau

    That’s exactly what I needed.   I looked for a the correct BSP on the Xilinx website, and could not find a minized version.   I failed to look at the minized reference designs.   I am now able to install petalinux with working Wi-Fi on my minized with a customized PL.  To summarize for those that may not know, here is what I am doing

     

    #on the linux host

    #set up the environment

    source /opt/pkg/petalinux/settings.sh

     

    #create the project once

    petalinux-create -t project  -n MINIZED  -s MiniZed.bsp

    cd MINIZED

     

    #entry of the iteration loop

    #Import the .hdf file (in this case the .hdf file is in ~/Xilinx)

    petalinux-config --get-hw-description=~/Xilinx

     

    #build the software, the image.ub will be in the images directory

    petalinux-build

     

    #from the minized, I tftp the image.ub on the linux host  to the minized eMMC memory, reboot and test on the new image.

    #as things are usually not quite right, I go back to Vivado and tweak the logic and export a new .hdf file and re-enter the iteration loop

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  • 0 in reply to stefanrousseau

    That’s exactly what I needed.   I looked for a the correct BSP on the Xilinx website, and could not find a minized version.   I failed to look at the minized reference designs.   I am now able to install petalinux with working Wi-Fi on my minized with a customized PL.  To summarize for those that may not know, here is what I am doing

     

    #on the linux host

    #set up the environment

    source /opt/pkg/petalinux/settings.sh

     

    #create the project once

    petalinux-create -t project  -n MINIZED  -s MiniZed.bsp

    cd MINIZED

     

    #entry of the iteration loop

    #Import the .hdf file (in this case the .hdf file is in ~/Xilinx)

    petalinux-config --get-hw-description=~/Xilinx

     

    #build the software, the image.ub will be in the images directory

    petalinux-build

     

    #from the minized, I tftp the image.ub on the linux host  to the minized eMMC memory, reboot and test on the new image.

    #as things are usually not quite right, I go back to Vivado and tweak the logic and export a new .hdf file and re-enter the iteration loop

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