Debian: Getting Started with the STM32MP157

This is a page about ST's STM32MP1 series of Cortex-A7 based Development Kits.

Availability

Boards:

Vendor Documentation

Basic Requirements

ARM Cross Compiler: GCC

This is a pre-built (64bit) version of GCC that runs on generic linux, sorry (32bit) x86 users, it’s time to upgrade…
Download/Extract:

#user@localhost:~$
wget -c https://releases.linaro.org/components/toolchain/binaries/6.5-2018.12/arm-linux-gnueabihf/gcc-linaro-6.5.0-2018.12-x86_64_arm-linux-gnueabihf.tar.xz
tar xf gcc-linaro-6.5.0-2018.12-x86_64_arm-linux-gnueabihf.tar.xz
export CC=`pwd`/gcc-linaro-6.5.0-2018.12-x86_64_arm-linux-gnueabihf/bin/arm-linux-gnueabihf-

Test Cross Compiler:

#user@localhost:~$
${CC}gcc --version
#Test Output:
arm-linux-gnueabihf-gcc (Linaro GCC 6.5-2018.12) 6.5.0
Copyright (C) 2017 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

Bootloader: U-Boot

Das U-Boot – the Universal Boot Loader: http://www.denx.de/wiki/U-Boot
Download:

#user@localhost:~$
git clone -b v2021.04 https://github.com/u-boot/u-boot --depth=1
cd u-boot/

Configure and Build:
stm32mp157c-ev1

#user@localhost:~/u-boot$
make ARCH=arm CROSS_COMPILE=${CC} distclean
make ARCH=arm CROSS_COMPILE=${CC} stm32mp15_basic_defconfig
make ARCH=arm CROSS_COMPILE=${CC} DEVICE_TREE=stm32mp157c-ev1 all

stm32mp157c-ed1

#user@localhost:~/u-boot$
make ARCH=arm CROSS_COMPILE=${CC} distclean
make ARCH=arm CROSS_COMPILE=${CC} stm32mp15_basic_defconfig
make ARCH=arm CROSS_COMPILE=${CC} DEVICE_TREE=stm32mp157c-ed1 all

stm32mp157a-dk1

#user@localhost:~/u-boot$
make ARCH=arm CROSS_COMPILE=${CC} distclean
make ARCH=arm CROSS_COMPILE=${CC} stm32mp15_basic_defconfig
make ARCH=arm CROSS_COMPILE=${CC} DEVICE_TREE=stm32mp157a-dk1 all

stm32mp157c-dk2

#user@localhost:~/u-boot$
make ARCH=arm CROSS_COMPILE=${CC} distclean
make ARCH=arm CROSS_COMPILE=${CC} stm32mp15_basic_defconfig
make ARCH=arm CROSS_COMPILE=${CC} DEVICE_TREE=stm32mp157c-dk2 all

Linux Kernel

This script will build the kernel, modules, device tree binaries and copy them to the deploy directory.
Download:

#user@localhost:~$
git clone https://github.com/RobertCNelson/armv7-lpae-multiplatform
cd armv7-lpae-multiplatform/

For v5.10.x (Longterm 5.10.x):

#user@localhost:~/armv7-lpae-multiplatform$
git checkout origin/v5.10.x -b tmp

Build:

#user@localhost:~/armv7-lpae-multiplatform$
./build_kernel.sh

Root File System

Debian 10

User Password
debian temppwd
root root

Download:

#user@localhost:~$
wget -c https://rcn-ee.com/rootfs/eewiki/minfs/debian-10.9-minimal-armhf-2021-04-14.tar.xz

Verify:

#user@localhost:~$
sha256sum debian-10.9-minimal-armhf-2021-04-14.tar.xz
#sha256sum output:
268ae963a067f13578858a9203ec6a0668d26c707c2fd5e42d0ad3ead5dc9289  debian-10.9-minimal-armhf-2021-04-14.tar.xz

Extract:

#user@localhost:~$
tar xf debian-10.9-minimal-armhf-2021-04-14.tar.xz

Ubuntu 18.04 LTS

User Password
ubuntu temppwd

Download:

#user@localhost:~$
wget -c https://rcn-ee.com/rootfs/eewiki/minfs/ubuntu-20.04.2-minimal-armhf-2021-04-14.tar.xz

Verify:

#user@localhost:~$
sha256sum ubuntu-20.04.2-minimal-armhf-2021-04-14.tar.xz
#sha256sum output:
46702f198730d6edeace72f6d3f9c41b7e097c78c17cb202cc0beee551021783  ubuntu-20.04.2-minimal-armhf-2021-04-14.tar.xz

Extract:

#user@localhost:~$
tar xf ubuntu-20.04.2-minimal-armhf-2021-04-14.tar.xz

Setup microSD card

We need to access the External Drive to be utilized by the target device. Run lsblk to help figure out what linux device has been reserved for your External Drive.

#Example: for DISK=/dev/sdX
lsblk
NAME   MAJ:MIN RM   SIZE RO TYPE MOUNTPOINT
sda      8:0    0 465.8G  0 disk
├─sda1   8:1    0   512M  0 part /boot/efi
└─sda2   8:2    0 465.3G  0 part /                <- Development Machine Root Partition
sdb      8:16   1   962M  0 disk                  <- microSD/USB Storage Device
└─sdb1   8:17   1   961M  0 part                  <- microSD/USB Storage Partition
#Thus you would use:
export DISK=/dev/sdb
#Example: for DISK=/dev/mmcblkX
lsblk
NAME      MAJ:MIN   RM   SIZE RO TYPE MOUNTPOINT
sda         8:0      0 465.8G  0 disk
├─sda1      8:1      0   512M  0 part /boot/efi
└─sda2      8:2      0 465.3G  0 part /                <- Development Machine Root Partition
mmcblk0     179:0    0   962M  0 disk                  <- microSD/USB Storage Device
└─mmcblk0p1 179:1    0   961M  0 part                  <- microSD/USB Storage Partition
#Thus you would use:
export DISK=/dev/mmcblk0

Erase partition table/labels on microSD card:

sudo dd if=/dev/zero of=${DISK} bs=1M count=10

Create Partition Layout:

#Check the version of sgdisk installed on your pc
sudo sgdisk --version
#Example Output
GPT fdisk (sgdisk) version 1.0.3
#Clear Previous Formatting
sudo sgdisk -o ${DISK}
#sgdisk
sudo sgdisk --resize-table=128 -a 1 \
        -n 1:34:545    -c 1:fsbl1   \
        -n 2:546:1057  -c 2:fsbl2   \
        -n 3:1058:5153 -c 3:ssbl    \
        -n 4:5154:     -c 4:rootfs  \
        -p ${DISK}
#Set legacy BIOS partition
sudo sgdisk -A 4:set:2 ${DISK}

Install Bootloader:

#user@localhost:~$
for: DISK=/dev/mmcblk0
sudo dd if=./u-boot/u-boot-spl.stm32 of=${DISK}p1
sudo dd if=./u-boot/u-boot-spl.stm32 of=${DISK}p2
sudo dd if=./u-boot/u-boot.img of=${DISK}p3
 
for: DISK=/dev/sdX
sudo dd if=./u-boot/u-boot-spl.stm32 of=${DISK}1
sudo dd if=./u-boot/u-boot-spl.stm32 of=${DISK}2
sudo dd if=./u-boot/u-boot.img of=${DISK}3

Format Partition:

for: DISK=/dev/mmcblkX
sudo mkfs.ext4 -L rootfs ${DISK}p4
 
for: DISK=/dev/sdX
sudo mkfs.ext4 -L rootfs ${DISK}4

Mount Partition:
On most systems these partitions may be auto-mounted…

sudo mkdir -p /media/rootfs/
 
for: DISK=/dev/mmcblkX
sudo mount ${DISK}p4 /media/rootfs/
 
for: DISK=/dev/sdX
sudo mount ${DISK}4 /media/rootfs/

Install Kernel and Root File System

To help new users, since the kernel version can change on a daily basis. The kernel building scripts listed on this page will now give you a hint of what kernel version was built.

-----------------------------
Script Complete
eewiki.net: [user@localhost:~$ export kernel_version=5.X.Y-Z]
-----------------------------

Copy and paste that “export kernel_version=5.X.Y-Z” exactly as shown in your own build/desktop environment and hit enter to create an environment variable to be used later.

export kernel_version=5.X.Y-Z

Copy Root File System

#Debian; Root File System: user@localhost:~$
sudo tar xfvp ./debian-*-*-armhf-*/armhf-rootfs-*.tar -C /media/rootfs/
sync
sudo chown root:root /media/rootfs/
sudo chmod 755 /media/rootfs/
#Ubuntu; Root File System: user@localhost:~$
sudo tar xfvp ./ubuntu-*-*-armhf-*/armhf-rootfs-*.tar -C /media/rootfs/
sync
sudo chown root:root /media/rootfs/
sudo chmod 755 /media/rootfs/

Setup extlinux.conf

#user@localhost:~$
sudo mkdir -p /media/rootfs/boot/extlinux/
sudo sh -c "echo 'label Linux ${kernel_version}' > /media/rootfs/boot/extlinux/extlinux.conf"
sudo sh -c "echo '    kernel /boot/vmlinuz-${kernel_version}' >> /media/rootfs/boot/extlinux/extlinux.conf"
sudo sh -c "echo '    append console=ttySTM0,115200 root=/dev/mmcblk0p4 ro rootfstype=ext4 rootwait quiet' >> /media/rootfs/boot/extlinux/extlinux.conf"
sudo sh -c "echo '    fdtdir /boot/dtbs/${kernel_version}/' >> /media/rootfs/boot/extlinux/extlinux.conf"

Copy Kernel Image

Kernel Image:

#user@localhost:~$
sudo cp -v ./armv7-lpae-multiplatform/deploy/${kernel_version}.zImage /media/rootfs/boot/vmlinuz-${kernel_version}

Copy Kernel Device Tree Binaries

#user@localhost:~$
sudo mkdir -p /media/rootfs/boot/dtbs/${kernel_version}/
sudo tar xfv ./armv7-lpae-multiplatform/deploy/${kernel_version}-dtbs.tar.gz -C /media/rootfs/boot/dtbs/${kernel_version}/

Copy Kernel Modules

#user@localhost:~$
sudo tar xfv ./armv7-lpae-multiplatform/deploy/${kernel_version}-modules.tar.gz -C /media/rootfs/

File Systems Table (/etc/fstab)

#user@localhost:~/$
sudo sh -c "echo '/dev/mmcblk0p4  /  auto  errors=remount-ro  0  1' >> /media/rootfs/etc/fstab"

WiFi

#user@localhost:~/$
wget -c https://raw.githubusercontent.com/STMicroelectronics/meta-st-stm32mp/dunfell/recipes-kernel/linux-firmware/linux-firmware/brcmfmac43430-sdio.txt
 
wget -c https://github.com/murata-wireless/cyw-fmac-fw/raw/master/cyfmac43430-sdio.bin
 
wget -c https://github.com/murata-wireless/cyw-fmac-fw/raw/master/cyfmac43430-sdio.1DX.clm_blob
 
sudo mkdir -p /media/rootfs/lib/firmware/brcm/
 
sudo cp -v ./brcmfmac43430* /media/rootfs/lib/firmware/brcm/
sudo cp -v ./brcmfmac43430-sdio.txt /media/rootfs/lib/firmware/brcm/brcmfmac43430-sdio.st,stm32mp157c-dk2.txt

Remove microSD/SD card

sync
sudo umount /media/rootfs

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