DFU not working from application

[gaminn]

Hi, I loaded S110 v8 to nrf51. Then I loaded dfu_dual_bank_ble_s110_pca10028 bootloader.

With this setup, I'm able to download my application via the bootloader.

The problem is: When I trigger bootloader from my application, it almost immediately resets back to my application.

I examined that the bootloader is launched (main function of dfu_dual_bank_ble_s110_pca10028) with NRF_POWER->GPREGRET = 0xB1 which is correct.

bootloader_dfu_start() function in bootloader is called however, something inside the function causes reset almost immediatelly after the function is entered.

Can you please help?

Bootloader project: dual_bank_ble_s110.zip

[bjorn-spockeli]

Try to debug the bootloader as explained in this post. It could sound like you're ending up in the error handler, which causes the chip to reset, see this post

[gaminn]

When the bootloader is triggered from application, then sd_softdevice_vector_table_base_set(BOOTLOADER_REGION_START); in ble_stack_init returns 1 (so an error). BOOTLOADER_REGION_START = 0x3A000

[gaminn]

However, this happens after I switched of optimization and loaded bootloader to 0x3A000 address (previously I had bootloader located at 0x3C000) so I think this issue is not related to the problem I described in my first post.

[bjorn-spockeli]

@gaminn: Could you share your bootloader project?

[gaminn]

I added the project to the initial post. It is dual_bank_ble_s110 example project for pca10028. Only modifications were made according to your first comment (optimization off, bootloader flash memory resize)