How to exit/reset STM32 DFU bootloader

Both dfu-util and dfu-tool can flash firmware, but their current versions can’t reset the STM32 from DFU mode to run the application.

I found that using MicroPython’s pydfu.py is able to reset the. Note that currently I use pydfu.py only for resetting, not for flashing (but that might change in the future).

Download using

download_pydfu.sh

wget https://raw.githubusercontent.com/micropython/micropython/master/tools/pydfu.py

wget https://raw.githubusercontent.com/micropython/micropython/master/tools/pydfu.py

Install the PyUSB dependency using

install_pyusb.sh

pip install -U pyusb

pip install -U pyusb

And then reset the STM32 in DFU mode:

pydfu_reset.sh

python3 pydfu.py -x

python3 pydfu.py -x

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