rogerclarkmelbourne/STM32duino-bootloader
STM32duino Bootloader
STM32duino-bootloader is a firmware bootloader and microcontroller firmware flasher designed for STM32 microcontrollers. Operating as a low-level startup routine, it initializes microcontroller peripherals, handles USB communication routines, and launches user applications upon system reset. This enables direct USB programming and application execution on the hardware without requiring external hardware programmers.
The bootloader supports firmware updates by presenting the microcontroller as a USB storage device that accepts binary drag-and-drop file transfers. It writes incoming firmware bytes directly into internal non-volatile memory sectors using low-level hardware controller registers and manages execution control by shifting interrupt handling vectors between the bootloader and the user application space.
Additional capabilities include programmatic host device re-enumeration by toggling data line voltage levels through specific hardware pins at startup, which forces a reset on boards lacking dedicated hardware reset lines. Firmware layouts, peripheral pins, and timing parameters can be customized for individual hardware variants using target-specific compile-time flags.
Features
- Mass Storage Deployment - Performs firmware updates by presenting the microcontroller as a USB storage device that accepts binary drag-and-drop file transfers.
- Microcontroller Flashers - A tool for flashing compiled binary applications onto embedded hardware devices via a standard USB connection.
- Microcontroller Programming - Flash microcontroller firmware directly through a USB connection using a standard development environment without external hardware programmers.
- STM32 Target Programming - Flashing compiled firmware onto STM32 microcontrollers directly over a USB connection without needing an external hardware programmer.
