Problem with custom DFU and dfu-util

[ant9000]

@tormod

It is a memory dump, starting by default at 0x08004000 (determined by the boot loader) unless you specify another address. […]
So if you upload from 0x08004000 you should be able to compare it with a raw binary file of the LIB, and from 0x0800C000 with a raw binary file of the APP.

I’m not able to get dfu-util to work the way you describe. As far as I can tell, setting the start address makes no difference - the uploaded file is always a dump of the first 32k of memory only:

sudo ./dfu-util -s 0x08004000 -a0 -U lib0.bin
sudo ./dfu-util -s 0x0800792c -a0 -U lib1.bin
sudo ./dfu-util -s 0x0800c000 -a0 -U app.bin

and I end up with three identical bin files. Is there something I’ve missed?

Thanks,

Antonio