OpenEmbedded/Yocto for UDOO Boards

Discussion in 'Yocto' started by graugans, Nov 7, 2015.

  1. modjo

    modjo Active Member

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    Good news !
     
  2. graugans

    graugans Administrator Staff Member

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    Can you please start a new thread with this? So people can better find this.
     
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  3. cyrilf

    cyrilf Active Member

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    I tested NTP client and it works like a charm. You just have to configure a list of time servers in the /etc/ntp.conf file. Otherwise, meta-networking also contains the ntimed package which is a lightweight NTP client.

    I see SPI and CAN bus options in the udooneo.conf file but nothin in the udooqdl.conf one. Does your layer support SPI and CAN for UDOO Quad/Dual?
     
  4. graugans

    graugans Administrator Staff Member

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    I think modjo has patches floating around for can & spi. I am not happy with current approach in Neo this is a ugly hack. I prefer devitree overlays. But this needs kernel 4.x

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  5. cyrilf

    cyrilf Active Member

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    Well this is not the best approach but this is the cleanest approach today I guess. I plan to implement a 6LoWPAN network using the Microchip's MRF24J40MA IEEE 802.15.4 transceiver module with the UDOO Quad and I need SPI communication for this. I'll move forward to UDOO Neo but for other hardware considerations I have to use the Quad before.
     
  6. graugans

    graugans Administrator Staff Member

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    Yes, I agree it is the best we have at the moment. For me it is a bit difficult to handle all use cases. And test all combination. Patches may not work good if deployed in another order or when a patch is missing in some scenarios

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  7. cyrilf

    cyrilf Active Member

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    Yes I noticed that disadvantage of patching. Anyway, I'll probably enable both CAN and SPI as CAN could be an alternative for 802.15.4.
     
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  8. modjo

    modjo Active Member

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    Hi cyrilf, can you precise here how you have added ntp to yocto please ? I'm also interrested by this please ?
    Otherwise, for can and spi i have some patch here for secoA62 (it would be working also for quad).
     
  9. cyrilf

    cyrilf Active Member

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    Simply add "ntp" to your IMAGE_INSTALL.

    Edit:

    I don't have the wlan0 interface on the UDOO Neo, even after configuring the wpa_supplicant.conf file. I have to run manually
    Code:
    ifup wlan0
    to see it.

    If I try ifup -a:
    Code:
    # ifup -a
    ifup: interface lo already configured
    ifup: interface eth0 already configured
    wlan0 is not listed.

    Any idea?
     
    Last edited: Nov 25, 2016
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  10. graugans

    graugans Administrator Staff Member

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    About W-LAN maybe the interface is not yet ready when init tries to bring it up. I have to check...

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  11. cyrilf

    cyrilf Active Member

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    I found the solution. Just add
    Code:
    auto wlan0
    before
    Code:
    iface wlan0 inet dhcp
    in the meta-udoo/recipes-core/init-ifupdown/init-ifupdown/<machine>/interfaces file.
    It enables it for
    Code:
    ifup -a
    command at start up.
     
    Last edited: Dec 9, 2016
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  12. cyrilf

    cyrilf Active Member

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    meta-fsl-demos and other meta-fsl layers (except meta-fsl-arm but for how long?) have been deleted. It seems now that meta-freescale and meta-freescale-distro (optional demo layer) and other meta-freescale-* layers have replaced them. Let see here.
     
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  13. graugans

    graugans Administrator Staff Member

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    Thx , for pointing this out. I have this on my list but due to some private priorities I have no time frame at the moment to switch to meta-freescale and Morty. Which will make some stuff more easy like qt5.7 etc...

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  14. cyrilf

    cyrilf Active Member

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    I'm looking to add patches for SPI and CAN buses and I wonder how do you write your patches without adding the kernel sources to your repo?
     
  15. modjo

    modjo Active Member

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    use quilt to do that. For example, if you need make a patch for the kernel go to yocto/neoBuild/tmp/work/udooneo-poky-linux-gnueabi/linux-udooboard/3.14-56-r0/git.
    open a shell
    $quilt new name-of-my-patch.patch
    $quilt add "name of the file that you want to pacth"

    make your modification directly on the file that you want to change
    $bitbake -ccomplile -f linux-udooboard

    check if you have that you want ...
    when you are satisfy, update your patch with
    $quilt refresh

    copy your patch in your layer and it to your recipe.
     
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  16. graugans

    graugans Administrator Staff Member

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    I do most of my patches with git. Which is called git workflow You can spawn a devshell with bitbake for each recipe. The workflow described by @modjo is called quilt workflow

    Code:
    bitbake -cdevshell virtual/kernel
    Due to the fact this shell runs within fakeroot context I mostly just copy its working directory and use a regular shell with my users git config. When finished you can create a patch with git format-patch. Yocto does provide a manual for kernel development
     
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  17. cyrilf

    cyrilf Active Member

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    Thanks for your advice. I'll try it as soon as possible to add SPI and CAN support for the UDOO Quad.
     
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  18. cyrilf

    cyrilf Active Member

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    I wrote some patches to enable SPI and CAN for the UDOO Quad. Here the is the SPI patch and here the CAN bus patch.
    I didn't try them directly but I looked at the kernel logs to see if everything is fine. Unfortunately, there is errors with the pinmux.

    There is no mention of pin 114 and pin 64 on the UDOO Quad pinout.

    PS: maybe it could be smarted to write custom .dts files with include to override UDOO kernel .dts like imx6dl-udoo-lvds7.dts do for LCD drivers support for example.
     
    Last edited: Dec 16, 2016
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  19. Retasor

    Retasor New Member

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    I am trying to create a Yocto image with Qt support for the seco-a-62-j duallite.
    Thanks to the work of @graugans and @modjo has done and shared with the community I was able to build the image and compile Qt5.6 into it together with the SDK, it boots and the HDMI is working.
    I'm wondering how I can get the LVDS output working and if it is already working. I did read @modjo was struggling with it. But couldn't find if it is solved in the mean time.

    I also want to know which branch I should use for the meta-qt5 layer. I'm on the jansa/krogoth at the moment
     
  20. graugans

    graugans Administrator Staff Member

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    Hello @Retasor I do prepare the morty branch which will support Qt 5.7 and meta-freescale. I hope I have something working soon.

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