Bootloader hardfault

[Sergy]

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:

Memory settings:

Compilation settings:

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:

Bootloader optimisation Level 2 gets stuck on run:

[bjorn-spockeli]

Your application is 70kB and not 47kB. This means that you need at least 140kB of application flash space( two banks of 70kB each) when using a Dual Bank Bootloader. If you use the default ROM settings for the bootloader, i.e. the bootloader starts at 0x3C000 then you'll have

0x3C000 - 0x18000 = 0x24000( 144kB left) 

However, extending the bootloader section in order to debug the bootloader you are left with

0x3A000 - 0x18000 = 0x22000( 136kB left) 

which is not enough and you will get the Data Size Exceeds Limiterror

[bjorn-spockeli]

NRF_ERROR_DATA_SIZE is returned at line 334, 339, and 415 in dfu_single_bank.c . Start a Debug Session in the bootloader project, set a breakpoint at each of these locations and perform a firmware update.

When I performed a DFU, I got caught at the breakpoint at line 334:

 if (m_start_packet.bl_image_size > DFU_BL_IMAGE_MAX_SIZE)
    {
        return NRF_ERROR_DATA_SIZE;
    }