Changelog for STM32 Bootloader

2.0.0

Released: 2026-09-12 | Download: 2.0.0

Added:

• Modern, modular and scalable project structure with well-defined abstraction layers based on the stm32-project-template
• BSP layer for the STM32L496-Discovery board
• CMake-based main build system with custom targets for building, formatting, and performing checks
• Linting with clang-tidy
• Static code analysis including MISRA-checks with cppcheck
• Devcontainer support
• Debug support with Segger Ozone
• Debug support with VSCode (via the Cortex-Debug extension)
• Detailed logging via UART

Changed:

• No more hardcoded addresses in the source code: flash layout & addresses are taken directly from the linker script
• Increased the bootloader flash area to 64 kB to ensure that builds with all debug information can fit
• CRC value for verification is now taken from a separate file on the SD card
• Multi-stage CI/CD pipeline with GitHub Actions (replacing Azure Pipelines)
• Refactored the entire source code to be fully MISRA-conform
• Doxygen documentation now extends to the entire source code (not only the bootloader part)
• Format checking is now handled by the clang_format.py script
• Updated the used CMSIS version
• Updated the used STM32 HAL Library version
• Updated the requirements

Removed:

• Custom hardware project variants
• Support for IAR

1.1.3

Released: 2020-07-22 | Download: 1.1.3

Fixed:

• Issue in CheckForApplication function when the stack pointer is configured to start from the very top of the RAM space

1.1.2

Released: 2020-06-08 | Download: 1.1.2

Added:

• CI pipeline job for building the STM32L496-Discovery project example

1.1.1

Released: 2020-05-27 | Download: 1.1.1

Added:

• GNU Arm Embedded Toolchain support for the STM32L496-Discovery project example
• Automatic source code formatting with clang-format
• Source code format check with CI

Changed:

• Replaced GitHub Actions with Azure Pipelines

Fixed:

• Doxygen warnings are fixed
• READMEs are updated

1.1.0

Released: 2019-10-26 | Download: 1.1.0

Added:

• Dedicated and separate project for all demonstrations
• New implementation for STM32L496 discovery board
• Dedicated readme file for each project
• New bootloader library documentation, generated with Doxygen
• GitHub Actions workflow to generate documentation and publish to GitHub pages

Changed:

• Complete repository overhaul
• Switched to semantic versioning

Fixed:

• CheckForApplication issue
• Updated README

1.08

Released: 2018-04-18 | Download: 1.08

Added:

• Verify flash content after programming
• Introduced changelog file

Changed:

• The bootloader is now optimized for a new hardware. Due to new pinout of LEDs, user button and SD card switch, the appropriate defines have been changed in main.h file.
• Bootloader sequence with richer error and debug messages
• Updated SD card driver with DMA support
• Project now uses IAR CMSIS pack
• Updated STM32L4xx CMSIS to 1.4.2
• Updated STM32L4xx HAL library to 1.8.2

Fixed:

• Changed appropriate variable types
• Updated README and sequence graph
• Updated header files

1.07

Released: 2017-12-08 | Download: 1.07

Added:

• SD card power on/off support

Changed:

• As a result of recent hardware changes introduced in a device that is developed as part of our ongoing projects, the SD card is now powered on/off with a FET controlled by the MCU to minimize energy consumption. Therefore, the SD card has to be manually powered on during initialization.

1.06

Released: 2017-11-13 | Download: 1.06

Added:

• Introduced RAM_SIZE define to precisely check whether the flash contains valid application upon startup

Fixed:

• CheckForApplication() function

1.05

Released: 2017-10-30 | Download: 1.05

Added:

• Application-specific configuration defines

Changed:

• Updated STM32L4xx CMSIS to 1.4.1
• Updated STM32L4xx HAL library to 1.8.1

1.04

Released: 2017-10-16 | Download: 1.04

Added:

• Option to skip programming after flash erase operation

Changed:

• Better visual feedback when no application is found in flash

Fixed:

• General improvements

1.03

Released: 2017-09-21 | Download: 1.03

Added:

• Support for STM32L496VG MCU
• Multiple build configurations for each supported microcontroller
• Change between different builds with a single click

Changed:

• Updated FatFs to R0.12c
• Updated Cortex-M CMSIS to 4.5
• Updated STM32L4xx CMSIS to 1.4.0
• Updated STM32L4xx HAL library to 1.8.0

1.02

Released: 2017-08-11 | Download: 1.02

Fixed:

• General improvements

1.01

Released: 2017-07-25 | Download: 1.01

Added:

• Option for clearing reset flags after startup

Fixed:

• Bootloader sequence graph
• Readme updates
• General improvements

1.00

Released: 2017-05-21 | Download: 1.00

Added:

• Initial release