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4. Firmware update preperation
To prepare the STM32 Device for a firmware update;
1. Power on the unit
2. Press and hold down the reset button
3. Press and hold down the identify button
4. Release the reset button and then release the identify button a second
after
Your PC should make an audible sound when this process is successful as
windows is detecting a new USB device.
5. Loading the firmware
Now open DfuSe Demo.
If the STM32 Device successfully entered DFU mode then it will appear as
‘STM Device in DFU Mode’ under the ‘Available DFU Devices tab’.
Now the .dfu file needs to be selected so that DfuSe Demo knows the correct
firmware to put on to the STM32 Device.
Figure 3 Device successfully recognised
