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meta-compulab-hab

This meta-layer allows using the cst-tools inside Yocto.

Supported machines:

  • imx8mm: ucm-imx8m-mini, mcm-imx8m-mini, iot-gate-imx8
  • imx8mp: ucm-imx8m-plus, som-imx8m-plus, iot-gate-imx8plus, iotdin-imx8p

How to use

Add to the Yocto build

  • Clone the layer repository to the ${BUILDIR}/../sources
git clone -b imx8-kirkstone https://github.com/compulab-yokneam/meta-compulab-hab.git ../sources/meta-compulab-hab
  • Update conf/bblayers.conf
cat << eof >> conf/bblayers.conf
BBLAYERS += "\${BSPDIR}/sources/meta-compulab-hab"
eof
  • Build cst-tools
bitbake -k cst-tools

Yocto build results:

Target Location
signed imx-boot ${BUILDIR}/tmp/deploy/images/${MACHINE}/flash.bin.signed
signed kernel image ${BUILDIR}/tmp/deploy/images/${MACHINE}/Image.signed
fuse values file ${BUILDIR}/tmp/deploy/images/${MACHINE}/fuse.out

Signing procedure with predefined keys

Note The crts and the keys folders contain keys generated by the latest Yocto build.
These forders can be replaced with the user generated keys.
The cst-tools recipe makes use of predefined keys if them are at crts and keys.

Building the image with predefined keys

  • Copy the user predefined crts and the keys to ${BUILDIR}/tmp/deploy/images/${MACHINE}/cst-tools folder:
cp -a /path/to/user-predefined/{crts,keys} ${BUILDIR}/tmp/deploy/images/${MACHINE}/cst-tools/
  • Goto to the ${BUILDIR} directory and rebuild the image:
bitbake -k cst-tools -c cleansstate
bitbake -k <image>

Using as a standalone tool

  • Goto cst-tools:
cd ${BUILDIR}/tmp/deploy/images/${MACHINE}/cst-tools
  • Signing the kernel
make kernel
stat hab/signed/k/Image
  • Signing imx-boot
make imx-boot
stat hab/signed/u/flash.bin
  • Generating fuse values
make fuse
stat hab/signed/f/fuse.out
  • Generating all targets kernel, imx-boot, fuse at the same time:
make
  • Cleaning up
Description Command
signed files only make clean
keys only make clean_keys
all files make clean_all

Fuse Programming