It allows for downloading the application program to the internal user memory (Flash, SRAM, OTP) without the need for a debugger using one of the available communication interfaces (USART, I2C, SPI, USB-DFU or FDCAN). It is fully compatible with the STM32 System Bootloader and supports the same communication interfaces and commands and can also be used with the STM32CubeProgrammer. Open Bootloader is provided as example code that can be used to build a customized bootloader. ST Open Bootloader is example application code for STM32 microcontrollers providing In-Application programming (IAP) and is offered in the STM32Cube MCU Packages and GitHub. How to use the ST Open Bootloader for STM32 Microcontrollers 1.
