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Bootloader hardfault

Hi,

Im trying to use BLE DFU Bootloader from examples. I loaded SD8 and then bootloader via nrfStudio (dont have a valid app flashed), but I cant see the device from Android app. I decided to do some debugging via Keil. I recompiled Bootloader with no optimisation and moved bootloader address to 0x3A000.

If I try to debug in Keil it doesnt stop at main, but if i manually press stop it gets into hardfault: image description

Memory settings: image description

Compilation settings: image description

Im using Revision 3 chip. What do I do wrong?

app.zip

hex

Bootloader

Bootloader hex O3

bootloader package without BANK_VALID_APP

Bootloader HEX without BANK_VALID_APP

Memory map according to NRF Studio: Memory map

Bootloader optimisation Level 2 gets stuck on run: image description

Image size > 0x6400

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