stm32mp257f-EV1 yocto

[raimondas]

Can someone explain how to build own custom yocto linux ?

I have experience with raspberry pi, but stm32mp2 have none normal explanation.

I have cloned from git scarthgap branch of poky, meta-openembedded, meta-st-stm32mp and meta-st-openlinux. Also, I have downloaded stm32mp SDK.

I can't understand if cubemx project for the board is needed ?

if needed how to add it if I have generated it ? I have many years of embedded programming of stm32

I can't find any build machine for bitbake for stm32mp257f-ev1 ?

Overall, trying to build default machine="stm32mp2" gives plenty errors, which I cannot understand.

Maybe someone can provide very direct explanation for building image ?

[PatrickF]

Hi @raimondas 

there is many information inside wiki

https://wiki.st.com/stm32mpu/wiki/Which_STM32MPU_Embedded_Software_Package_better_suits_your_needs

https://wiki.st.com/stm32mpu/wiki/STM32MPU_Developer_Package

Regards.

[raimondas · Accepted solution]

Thank You @PatrickF 

However provided references not giving any real information on development, just concept. practically documentation is shity.

I have solved in few days but it was to long.

1. Download source code

git clone -b scarthgap https://github.com/yoctoproject/poky.git

git clone -b scarthgap https://git.openembedded.org/meta-openembedded

git clone -b scarthgap https://github.com/STMicroelectronics/meta-st-stm32mp.git

git clone -b scarthgap https://github.com/STMicroelectronics/meta-st-openstlinux.git

2. Make build enviroment

source poky/oe-init-build-env

3. modify local.conf in build → conf

MACHINE = "stm32mp2"

DISTRO ?= "openstlinux-weston"

ACCEPT_EULA_stm32mp2 = "1"

PREFERRED_VERSION_libcamera = "0.3.0"

Here a problems with default libcamera 0.4.0 so it is needed to downgrade

4. modify bblayers.conf in build → conf

BBLAYERS ?= " \

/home/raimondas/poky/meta \

/home/raimondas/poky/meta-poky \

/home/raimondas/poky/meta-yocto-bsp \

/home/raimondas/meta-openembedded/meta-oe \

/home/raimondas/meta-openembedded/meta-multimedia \

/home/raimondas/meta-openembedded/meta-networking \

/home/raimondas/meta-openembedded/meta-python \

/home/raimondas/meta-openembedded/meta-gnome \

/home/raimondas/meta-openembedded/meta-webserver \

/home/raimondas/meta-st-stm32mp \

/home/raimondas/meta-st-openstlinux \

/home/raimondas/build/workspace \

"

5. modify file name

from

/home/raimondas/meta-st-openstlinux/oe-core/recipes-core/systemd/systemd_255.13.bbappend

to

/home/raimondas/meta-st-openstlinux/oe-core/recipes-core/systemd/systemd_255.18.bbappend

6. build

bitbake st-image-weston

or

bitbake st-image-core #this one only using ssh, it's headless.

7. preparing to flash emmc

cd ~/build/tmp-glibc/deploy/images/stm32mp2

and

STM32_Programmer_CLI -c port=usb1 -w flashlayout_st-image-core/optee/FlashLayout_emmc_stm32mp257f-ev1-optee.tsv

Whats all for basic setup. 

I wanted something as core-image-base or minimal, with hdmi/dsi output, but this time it is not supported currently.