Is there a way to read which product part number is connected via DFU bootloader?

[BPric.557]

I'm looking for a way to detect which device part number (EX: STM32F765...) is connected via the USB DFU bootloader before programming the device (as a sanity check to make sure the file is appropriate/compatible). I can see the VID/PID/REV and Option Bytes, but that is not specific enough.

Is there any way to do this? Or are there other recommended ways to check device compatibility with a target .DFU file?

For context, I'm envisioning a situation where I have 2 very different STM32 devices that support the USB DFU bootloader but require different DFU files.

[Uwe Bonnes]

dfu-util -l lists the exported memory regions like for a F303:

Found DFU: [0483:df11] ver=2200, devnum=29, cfg=1, intf=0, path="2-2.1", alt=1, name="@Option Bytes /0x1FFFF800/01*016 e", serial="FFFFFFFEFFFF"

Found DFU: [0483:df11] ver=2200, devnum=29, cfg=1, intf=0, path="2-2.1", alt=0, name="@Internal Flash /0x08000000/064*0002Kg", serial="FFFFFFFEFFFF"

This gives at least some hints on the attached device

[BPric.557]

Thanks! Do you know what that "devnum" identifier represents?

[Uwe Bonnes]

The devnum is something from the Linux USB handling.