Release Notes 4.0.0 Print




This is the Linux BSP (Board Support Package) and the development environment for the STM32MP1 System-On-Module (SOM) and Starter Kit, release 4.0.0.

The BSP provides a software development environment for evaluation and development of Linux (uClinux) on the Cortex-A7 processor core of the STM32MP1 microcontroller using the Emcraft STM32MP1 SOM Starter Kit as a hardware platform.

Supported Features

The following list provides a summary of the features and capabilities of this release of the STM32MP1 BSP:

  • Linux:
    • Kernel v.6.1.28;
    • Serial Linux console;
    • Ethernet device driver and Linux TCP/IP networking (ping, NFS, Telnet, FTP, NTPD, etc);
    • eMMC/SD device driver;
    • USB host/gadget device driver;
    • LCD device driver;
    • Touchscreen device driver;
    • Clock driver;
    • pinctrl driver;
    • busybox v1.36.0;
    • POSIX pthreads;
    • Hardened exception handling; an exception triggered by a process affects only the offending process.
  • U-Boot firmware:
    • U-Boot v 2022.10;
    • Serial console command interface with various setup, test and maintenance commands;
    • Environment variables allowing customisation of a unit;
    • Sophisticated OS auto-boot sequence;
    • Partitioning and management of external Flash;
    • Initial installation of Linux image to external Flash.
  • Development environment:
    • Linux-hosted cross-development environment;
    • Yocto v4.2.1 distribution.

New and Changed Features

This section lists new and changed features of this release:

  1. Update Emcraft BSP to ST BSP 5.0.0.
    : RM 6651.

Known Problems and Limitations

This section lists known problems and limitations of this release:

  1. Managing U-Boot environment from Linux is not supported.
  2. Some SD cards (mostly 32GB and higher capacity) are not detected or properly initialized by the system.
    ID: RM 6831.
    Workaround: 8GB SD cards from Kingstone, Transcend, Bestbuy are known to work reliably and can be used as a temporary work-around until a more generic solution is developed.

Further Reading


Customers of the Emcraft i.MX 8M Starter Kit may contact Emcraft at This e-mail address is being protected from spambots. You need JavaScript enabled to view it for support.