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Release Notes 1.14.2 Print

 

Overview

This is the Linux BSP (Board Support Package) for the STM32F7 Discovery board.

The BSP provides a software development environment for evaluation and development of Linux (uClinux) on the Cortex-M7 processor core of the STM32F7 microcontroller using the STM32F7 Discovery board as a hardware platform.

Supported Features

The following list summarizes the features and capabilities of this release of the STM32F7 Discovery board BSP:

  • U-Boot firmware:
    • U-Boot v2010.03;
    • Target initialization from power-on / reset;
    • Runs from the internal eNVM and internal SRAM (no external memory required for standalone operation);
    • Serial console;
    • Ethernet driver for loading images to the target;
    • Device driver for on-chip Flash and self-upgrade capability;
    • Autoboot feature, allowing boot of OS images from network with no operator intervention;
    • Persistent environment in on-chip Flash for customization of target operation;
    • Sophisticated command interface for maintenance and development of the target.
  • Linux:
    • uClinux kernel v2.6.33;
    • Serial device driver and Linux console;
    • Ethernet device driver and networking (ping, NFS, Telnet, FTP, NTPD, etc.);
    • busybox v1.17;
    • POSIX pthreads;
    • Hardened exception handling; an exception triggered by a process affects only the offending process;
    • Loadable kernel modules;
    • Secure shell (ssh) daemon;
    • Web server;
    • GPIO device driver;
    • SD Card device driver;
    • Device driver (host mode) for USB high-speed interface;
    • RTC device driver.
  • Development tools:
    • ARMv7-optimized GNU toolchain from CodeSourcery (2010q1) is used for development of U-Boot, Linux and user-space applications (toolchain must be downloaded separately from the CodeSourcery web site);
    • Cross GDB for debugging user-space applications;
    • mkimage tool used by the Linux kernel build process to create a Linux image bootable by U-Boot.
  • Development environment:
    • Linux-hosted cross-development environment;
    • Development of multiple projects (embedded applications) from a single installation;
    • hello sample project ("Hello, world!" single-process configuration);
    • networking sample project (basic shell and networking demonstration);
    • developer sample project(template project that can be used to jump-start development of custom user-space applications and loadable kernel modules).

New and Changed Features

This section lists new and changed features of this release:

  1. Develop I2C device driver for Linux STM32F7.
    ID: RT 111936.
  2. STM32F7-DISCO: U-Boot: fix the console device passed to Linux. Removed macros for unsupported boot methods.
    ID: RT 113340.

Known Problems & Limitations

This section lists known problems and limitations of this release:

  1. CONFIG_KERNEL_IN_ENVM requires disabling CONFIG_ARM_UNWIND and CONFIG_EARLY_PRINTK.
    ID: RT 74683.
    Workaround: When enabling CONFIG_KERNEL_IN_ENVM in the kernel, disable CONFIG_ARM_UNWIND and CONFIG_EARLY_PRINTK.