bootloader activate and reset - won't reset

Question

Hi, I'm using trying to use the DFU via BLE, dual bank example from SDK 8.1.1 (with SD 8.0.0) and got it all working up to the point where I call "activate image and reset". 
 At that point, it activates the image, which calls dfu_image_activate() . This succeeds, and then nothing happens: the reset is in an if statement: if (err_code != NRF_SUCCESS) (at dfu_transport_ble.c:591 ). 
 I tried changing that, so that dfu_reset() gets called anyway, then it gets to m_update_status = BOOTLOADER_RESET; (at bootloader.c:234 ), and that's it.
It seems like the reset never happens, because it never gets handled, I guess it's stuck at sd_app_evt_wait() ? 
 Anyone knows how to fix this properly? 
 edit 
 Seems like it got stuck in app_sched_execute() , handling BLE_GAP_EVT_DISCONNECTED in dfu_transport_ble.c with error code 5 (NRF_ERROR_NOT_FOUND). It gets disconnected in dfu_transport_close (at dfu_transport_ble.c:1095 ).

Hung Bui · Accepted Answer

Hi Bart, 
 You should not edit the dfu_transport_ble.c to trigger system reset when err_code == NRF_SUCCESS.
What we do inside dfu_image_activate() is to call m_functions.activate() which is equal to dfu_activate_app(). In this function we will actually do the flash swapping and updating the bootloader information. 
 What the bootloader does after the dfu_image_activate() call is to wait for the PSTORAGE_STORE_OP_CODE event from the stack in pstorage_callback_handler() in bootloader.c telling the bootloader setting is saved (BOOTLOADER_COMPLETE) and return to main to switch to application (bootloader_app_start() ). 
 If you test with our DFU example without any modification, would it work ? If not, what was the behaviour ?