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Add possibility to jump to USB-DFU bootloader from firmware #9
The jump to ST's USB DFU bootloader (in "System memory") was implemented with commit 59b2813 and seems to (partially) be working: The system memory is being re-mapped to 0x00000000, the stack pointer is updated and the bootloader's reset handler is executed.
For some reason though, execution doesn't remain in the bootloader. It quickly returns to the application's main(), which means, the MCU is reset by the bootloader program.