nrf_dfu_mbr_init_sd reboots

[Atanas Palavrov]

I raised a github issue to show you where exactly got a HardFault exception. Seems that there is something wrong with the provided SD132 v4.02 especially in function at address 0x00028720 - this is where I was able to debug without debug information or sources. From what I see the instruction on address 0x002872E loads a wrong pointer to pointer (0x8C5 - note the odd address) and then the instruction on address 0x0028732 loads much wronger address 0xDB681B4B that is used as base to store a byte in the next instruction. After that the arm core obviously get into IMPRECISERR HardFault exception. This problem occurs on each restart.

Is there something that I could do to investigate further or to work around it?

[Vidar Berg]

Hello,

Address 0x002872E should be inside the app region? Does the app run ok by itself if you don't program the bootloader?

Best regards,

Vidar

[Atanas Palavrov]

Damn ... indeed it is my app.

I was fooled by the next call to 'nrf_bootloader_app_start_impl' i.e. didn't expect at all 'nrf_dfu_mbr_init_sd' to not exit and run the app directly.