Config Reset and DFU on the same Switch

[MicroMarty]

Is it possible, without changing the code, to combine the two functions of resetting the configuration and entering DFU mode on the same tactile switch?
If pressed during boot, it starts in DFU mode; if pressed while the system is running, the configuration is restored.
I made a quick diagram to illustrate this, and I'll try to test it with what I have.
Thanks!

[CShark]

That should work I think, as long as NRST is not involved. The Boot0 is default-low and only registers a high during power on, while the reset is also default low and only registers a high when booted with boot0 low, so I don't see why this shouldn't work.