Release Notes 2.6.0 Print

 

Overview

This is the Linux BSP (Board Support Package) and the development environment for the STM32H7 System-On-Module (SOM) and Starter Kit, release 2.6.0.

The BSP provides a software development environment for evaluation and development of Linux (uClinux) on the Cortex-M7 processor core of the STM32H7 microcontroller using the Emcraft STM32H7 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 STM32H7 BSP:

  • Linux:
    • Kernel v.6.1.28;
    • Serial Linux console;
    • Ethernet device driver and Linux TCP/IP networking (ping, NFS, Telnet, FTP, NTPD, etc);
    • Clock driver;
    • pinctrl driver;
    • busybox v1.35.0;
    • POSIX pthreads;
    • Hardened exception handling; an exception triggered by a process affects only the offending process.
  • U-Boot firmware:
    • U-Boot v 2019.04-rc3;
    • 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;
    • 10.3-2021.10 Arm Embedded Toolchain is used for development of U-Boot, Linux;
    • 11.3 GNU toolchain is used for development of user-space applications;
    • ELF / dynamic linking supported;
    • Debugging of user-space applications with cross-GDB;
    • Hardware FPU enabled in the toolchain and kernel;
    • mkimage tool used by the Linux kernel build process to create a bootable Linux image.

Software Manifest

Repo Link Hash Branch
Linux STM32H7 https://github.com/EmcraftSystems/linux-stm.git 6440efa8742c linux-cm-stm32h7-2.6.0
U-Boot STM32H7 https://gitlab.com/emcraft/STM32H7/u-boot-upstream.git 21ffdfe253 linux-cm-stm32h7-2.6.0

New and Changed Features

  1. Bring up uClinux on STM32H7-BSB Rev 3A.
    ID: STM32H7-7.
  2. Migrate to HZ_1000.
    ID: STM32H7-11.
  3. Add alternative STM32H7 pin settings for I2C/SPI/UART interfaces.
    ID: STM32H7-8.
  4. Define usart6 in STM32H743 device tree.
    ID: STM32H7-8.
  5. Add alternative STM32H7 pin settings for I2C/SPI/UART interfaces.
    ID: STM32H7-8.
  6. Enable NL80211 driver.
    ID: STM32H7-8.
  7. Strip binaries to save memory on uClinux.
    ID: STM32H7-8.
  8. Fix bug: Workaround for arbitrary errors while writing U-Boot image to Flash from SPL.
    ID: STM32H7-18.
  9. Fix bug: gcc 11.3: gdbserver crashes when attempting to start remote debugging.
    ID: RM 6821.
  10. Fix bug: gdb 11.2: Termination of the gdbserver program leads to segmentation fault.
    ID: RM 7001.
  11. Fix bug: Сan't resolve symbol by the ldso interpretator.
    ID: RM 6943.

Known Problems and Limitations

This section lists known problems and limitations of this release:

  1. Managing U-Boot environment from Linux is not supported.
    ID: STM32H7-17.
  2. Switch to Low Power Mode doesn't work in uClinux 2.6.0 for STM32H7 SOM.
    ID: STM32H7-21.
  3. Controlling LED 1 from user space doesn't work in uClinux 2.6.0 for STM32H7 SOM.
    ID: STM32H7-22.