ble softdevice enable fail with bootloader

RE: ble softdevice enable fail with bootloader

Vidar Berg — Mon, 02 Mar 2026 09:26:52 GMT

You can work around this by calling nrf_dfu_mbr_init_sd() at the start of main() in your application.

RE: ble softdevice enable fail with bootloader

Liny — Mon, 02 Mar 2026 09:03:12 GMT

Thank you for the assistance. I've verified that what you said is correct, but apart from that, are there any other solutions? Since my boot program is already burned into the chip and cannot be updated, I'm unable to fix this bug in the bootloader.
Best regards.

RE: ble softdevice enable fail with bootloader

Vidar Berg — Mon, 02 Mar 2026 06:51:12 GMT

Hello,

The issue is that the SVCall_IRQn interrupt triggered by the Softdevice enable API doesn't reach the Softdevice, but instead gets forwarded directly to the application. This can happen if you have the nrf_bootloader_app_start() jump directly to the main app instead of address 0x1000 where the softdevice starts.

Please change IMAGE_START_ADDR to "0x1000" and try again.

Best regards,

Vidar