nrf52 sdk15.3 pca10040 secure bootloader exemple flash fail

[sarah_sdw]

Hello,

I use the board pca10040 v1.2.4 with the SDK 15.3

I started from the example: dfu \ secure_bootloader on Keil.
I can flash without worry the softdevice and compile the bootloader. but when I want to flash the bootloader I get the error: "Flash download failed -" Cortex-M4 "

I feel that the bootloader wants to write in the region of softdevice but I do not know how to solve the problem.

My Areas for the bootloader are:
IROM1: 0x72000 size 0xC000
IRAM1: 0x200057B8 size 0xA848

I have already looked at this subject without success:
https://devzone.nordicsemi.com/f/nordic-q-a/45910/debugging-serial-uart-bootloader-sdk-15-3

Thanks for your help

[sarah_sdw]

I change the address of MBR parameter page and I have no problem now.

in nrf_mbr.h:

old:  MBR_PARAM_PAGE_ADDR (0xFFC)

new: MBR_PARAM_PAGE_ADDR (0x10001018)