Hi! For a custom board, I have my app working ok. So I wanted to add the dfu secure bootloader to my project. I Had no problem to do that, both app and bootloader start ok and I could download the software package ok.
BUT: near to a minute after de app start, it crash. In debug I get: FPU_IRQHandler, inside of "Default Handler" at "arm_startup_nrf52" [UPDATED]: See the picture below.
If I erase the bootloader (no need of downdload the app again) all works fine [UPDATED]: I tried it again, and I was wrong.
I'm suspecting a memory issue, maybe in ram? But I had no succed in found a solution.