DFU Bootloader

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All STM32 MCUs have a built-in bootloader which will allow reflashing. The Boot0 pin is used to toggle between "normal" boot and this bootloader. Unfortunately this process can not be controlled without manipulating the Boot0 pin, so if we want to control this from our application, we will have to implement our own bootloader.

Overall Architecture

Address Size (hex) Size (kb)
End --> 0x808000 0x8000 32kB
0x807800 0x8000 32kB
0x807800 0x8000 32kB
0x807800 0x8000 32kB
0x807800 0x8000 32kB
0x807800 0x8000 32kB
0x807800 0x8000 32kB
0x807800 0x8000 32kB
0x807800 0x8000 32kB
0x807800 0x8000 32kB
0x807800 0x8000 32kB

Bootloader

Application

Miscellaneous Links