On Wed, Feb 5, 2025 at 10:39 AM jdowd via lists.yoctoproject.org <jdowd=slashdevslashnull....@lists.yoctoproject.org> wrote: > > I have a recently purchased Raspberry Pi Zero 2 W (Jan. 2025) which does work > with the raspberry Pi environment. I want to use Yocto going forward as I > develop my application. For now, I would just like to see this board boot > using my own built image. I've cloned the latest Yocto repo along with the > "meta-raspberrypi". > > I've done these modifications: > > In local.conf > > MACHINE ??= "raspberrypi0-wifi" > ... > INHERIT += "rm_work" > DL_DIR ?= "/home/users/yocto_shared/downloads" > SSTATE_DIR ?= "/home/users/yocto_shared/sstate-cache" > # for CPU count and how many parallel threads will be used > BB_NUMBER_THREADS = "6" > MACHINE_FEATURES = " bluetooth wifi usbhost" > PREFERRED_PROVIDER_virtual/kernel = "linux-raspberrypi" > IMAGE_INSTALL:append = " linux-firmware-bcm43430 wpa-supplicant dhcpcd" > ENABLE_UART = "1" > SERIAL_CONSOLE = "tty1"
maybe this is not needed. > DISABLE_RPI_BOOT_LOGO = "1" > DISABLE_OVERSCAN = "1" > DISABLE_SPLASH = "1" > BOOT_DELAY = "0" > GPU_MEM = "16" > PACKAGE_CLASSES = "package_ipk" > DISTRO_FEATURES:append = " wifi " > IMAGE_FSTYPES = "tar.bz2 ext4 rpi-sdimg" > SDIMG_ROOTFS_TYPE = "ext4" > > > In bblayers.conf I've added the layer meta-raspberrypi > > My next step is to build using the command "bitbake core-image-minimal". This > gives me my first question, am I building the correct target? It does build > and I get my rpi-sdimg file and when it is placed on the SD card (using "dd") > I can see my image files all laid out as I would expect. > > I had to edit the config.txt file that is part of the boot sequence. I've > attached the one I'm using. Essentially the changes I did from the one that > Yocto generated was to enable the serial output (I also modified bootcode.bin > as you can see in the output) do aid in debugging. I also made sure that > bootcode.bin knew I was loading a 32-bit kernel. > > When I boot, I get the desiired output up until the handoff from bootcode.bin > to the kernel. The output goes silent at that point. I presume that the > system is dead. The LED on the raspberrypi Zero 2 W board stays solid. > > I've attached my output from the console (raspi0-boot.txt). > > I've tried to replace the kernel from the raspberry Pi environment with my > yocto built one but I get the same output. I've also done some changes so > that I was able to see if I could get a 32-bit u-boot to load, I get the same > issues. > > I'm looking for some advice as to how to proceed. Have I run into a "wrong > image format" issue? Is there some kind of arcane format that the raspberry > Pi's bootcode.bin requires? Or, am I running into a device tree issue? As far > as I can tell, the console output from the staged boot loader from Pi is the > last line expected before the kernel starts to output it's start up sequence. > So I presume that the image is unable to be executed. you can try building a wic image instead of rpi-sdimage IMAGE_FSTYPES:append = " wic.bmap wic.bz2" then you can dd the generated wic image. > > Thanks in advance for any advice. > > Cheers!! > > > > >
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