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Minized Petalinux 2020 - WiFi Shell Script

apadana1984

Hello,

 

I am building Petalinux 2020.1 for my Minized Board. I downloaded the Avnet BSP package. I noticed that the default Shell script for enabling the WiFi module has an issue:

 

#Mount the eMMC

echo "Mount the eMMC."

mount /dev/mmcblk1p1 /mnt

 

When I boot my Petalinux, there is not such "mmcblk1p1". There is "mmcblk0p1". What is the best way to correct this file? I changed it and re-built my Petalinux, however, the shell script in the image file didn't change!!! Am I missing something?

 

Also, I changed my "wpa_supplicant.conf" file to include my WiFi user ID&PASSWD, however, the file doesn't change in the linux image file.

 

I appreciate if someone can look into this problem.

 

Thank you

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  • 0

    Hi Iman,

     

    That shell script (wifi.sh?) has been used for years, so I am surprised that it is breaking now.  I will look into this.

     

    The reason why the script reverts to its original state on a reboot is because the MiniZed, by default, boots a RAMdisk root filesystem.  This means the entire filesystem exists in RAM while the system is booted and is thus volatile.  Changes and edits to files are not persistent on a reboot.  That is why the wpa_supplicant.conf file, once edited with your WLAN SSID and password information, is meant to be stored on the FAT partition of the eMMC (mmcblk<0|1>p1) memory.

     

    The MiniZed can be configured to boot the Linux kernel from QSPI and mount a persistent filesystem on a EXT4 partition of the eMMC.  I believe there are shell scripts provided in the BSP that will program the QSPI and eMMC for this boot method.

     

    --Tom

  • 0 in reply to narrucmot

    Thank you Tom. By non-updating scripts, I meant the scripts in "rootfs.wic" file created in the host Linux machine. There are two directories in which we can find "rootfs.wic":

     

    1. <project-home>/images/linux/
    2. <project-home>/pre-built/linux/images

     

    The first one updates once we build the Petalinux project. But the second one doesn't update. Maybe its name "pre-built" implies that.(?!)

     

    Iman

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  • 0 in reply to narrucmot

    Thank you Tom. By non-updating scripts, I meant the scripts in "rootfs.wic" file created in the host Linux machine. There are two directories in which we can find "rootfs.wic":

     

    1. <project-home>/images/linux/
    2. <project-home>/pre-built/linux/images

     

    The first one updates once we build the Petalinux project. But the second one doesn't update. Maybe its name "pre-built" implies that.(?!)

     

    Iman

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