SDK14 Secure Buttonless DFU with Bonding

RE: SDK14 Secure Buttonless DFU with Bonding

bjorn-spockeli — Tue, 19 Sep 2017 08:44:45 GMT

Yes, the before the reset you will get a callback to the app_shutdown_handler in main.c with the power manager event, NRF_PWR_MGMT_EVT_PREPARE_DFU. When you get this event you can prevent the device from resetting until you have finished all your ongoing tasks by returning false. The app_shutdown_handler will then be called every second until it returns true and the device resets.

RE: SDK14 Secure Buttonless DFU with Bonding

Cory Mast — Mon, 18 Sep 2017 22:14:41 GMT

Thanks Bjørn, that solved my problem! Out of curiosity, can you suggest a way to prevent the reboot cycle until after my application has a chance to finish any ongoing operations? It appears that the device will reboot after the bonding data is written to flash, I am wondering if the main application has a way to prevent this reboot until it has a chance to finalize preparing for reset.

Thanks!

Cory

RE: SDK14 Secure Buttonless DFU with Bonding

bjorn-spockeli — Mon, 18 Sep 2017 09:37:15 GMT

Hi Cory,

I apologize for the late reply.

You have make sure that NRF_DFU_BLE_REQUIRES_BONDS is set to 1 in the sdk_config.h file of the bootloader_secure_ble example.

With this flag set you should see that nrf_dfu_set_peer_data_init() returns 0 and not 1.

Best regards

Bjørn