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:

[Sergy]

No, didnt change anything else. But now I get sometimes GATT error and sometimes not, so at least something. Im using Huawei P8Lite, Android version 5.0.1. I do understand lowering interval gives better calibration:) what about negative effects?

Meanwhile I tried to upload my own application which is 47K and from MCP I get the following error: Data Size Exceeds Limit. Im trying to upload application only, so even with dual bank it should work. Any idea why it says exceeding size? (in first tests I was using attached HRM hex and zip files). Here is manifest of my update pckg:

{
    "manifest": {
        "application": {
            "bin_file": "blinky_arm.bin",
            "dat_file": "blinky_arm.dat",
            "init_packet_data": {
                "application_version": 65535,
                "device_revision": 65535,
                "device_type": 65535,
                "firmware_crc16": 47807,
                "softdevice_req": [
                    100
                ]
            }
        },
        "dfu_version": 0.5
    }
}

Thanks!