I had this problem several times, problem mostly time is with BOOT0 pin.Probably in your design it is connected to something and forces a change of the interrupt vertor table address.Please check SCB_VTOR registry, should point to flash memory (not S...

I had this problem several times, problem mostly time is with BOOT0 pin.Probably in your design it is connected to something and forces a change of the interrupt vertor table address.Please check SCB_VTOR registry, should point to flash memory (not S...