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Disclaimer

!IMPORTANT! This is a development branch, that is not relelased by CompuLab officially yet

Supported Compulab Products

Configuring the build

Setup Yocto environment

  • WorkDir:
mkdir compulab-nxp-bsp && cd compulab-nxp-bsp
  • Set a CompuLab machine:
Machine Command Line
ucm-imx8m-plus export MACHINE=ucm-imx8m-plus
som-imx8m-plus export MACHINE=som-imx8m-plus
iot-gate-imx8plus export MACHINE=iot-gate-imx8plus
sbc-iot-imx8plus export MACHINE=iot-gate-imx8plus
iotdin-imx8p export MACHINE=iotdin-imx8p

Initialize repo manifests

  • NXP
repo init -u https://github.com/nxp-imx/imx-manifest.git -b imx-linux-kirkstone -m imx-5.15.71-2.2.0.xml
  • CompuLab
mkdir -p .repo/local_manifests
wget --directory-prefix .repo/local_manifests https://raw.githubusercontent.com/compulab-yokneam/meta-bsp-imx8mp/kirkstone-2.2.0/scripts/meta-bsp-imx8mp.xml
  • Sync Them all
repo sync

Get the product DRAM configuration

The device DRAM configuration is at the device label and is also stored in the device EEPROM.

  • Getting memory configuration from the label: Use the 'D' option code from the device label.

  • Getting memory configuration from the EEPROM:

Environment Command Output Description
U-Boot i2c dev 1; i2c md 0x50 0x90 0x10 0090: 43 31 38 30 30 51 4d 2d 44 34 2d 4e 33 32 2d 00 C1800QM-D4-N32-. D4 = 4G
Kernel i2cdump -f -y 1 0x50 2>/dev/null | awk '/^90:/' 0: 43 31 38 30 30 51 4d 2d 44 34 2d 4e 33 32 2d 00 C1800QM-D4-N32-.
  • Mapping of product DRAM configuration to DRAM_CONF:
Product DRAM Option DRAM_CONF Supported ddr chip
D1,D8 d1d8 Samsung 1G, Micron 8G
D2,D4 d2d4(default) Samsung 2G, Micron 4G
D4,D4 d4d4(U-Boot 2022.04 only) Samsung 4G, Micron 4G

Setup build environment

  • Initialize the build environment:
source compulab-setup-env -b build-${MACHINE}
  • Enable the d2d4 dram setting's subset:
sed -i '$ a DRAM_CONF = "d2d4"' ${BUILDDIR}/conf/local.conf
  • Enable the d1d8 dram setting's subset:
sed -i '/DRAM_CONF/d' ${BUILDDIR}/conf/local.conf
  • Enable the d4d4 dram setting's subset (U-Boot 2022.04 only):
sed -i '$ a DRAM_CONF = "d4d4"' ${BUILDDIR}/conf/local.conf

Build targets

  • Building the image:
bitbake -k imx-image-full
  • Building the bootloader file only:
build command binary file location
bitbake -k imx-boot ${BUILDDIR}/tmp/deploy/images/${MACHINE}/imx-boot-tagged

Get back to the already created build environment

cd compulab-nxp-bsp
repo sync
source setup-environment build-${MACHINE}

Deployment

Create a bootable sd card

  • Goto the tmp/deploy/images/${MACHINE} directory:
cd tmp/deploy/images/${MACHINE}
  • Deploy the image:
zstd -dc imx-image-full-${MACHINE}.wic.zst > imx-image-full-${MACHINE}.wic
sudo bmaptool copy --bmap imx-image-full-${MACHINE}.wic.bmap imx-image-full-${MACHINE}.wic /dev/sdX