nRF5 SDK 17.1.0 Secure DFU Bootloader and MCUboot as second stage bootloader

[Andrei H.]

Hi,

 Can MCUboot be used as a second stage bootloader (an application from the Secure DFU Bootloader over Serial Link standpoint) to be DFU'ed to existing devices which now are updateable w/ BL + SD + APP ?

Regards.

[Andrei H.]

Hi Vidar,

 I've made the changes this is the output:|

[00:00:07.315,429] <inf> btn: NRF_POWER->GPREGRET: 0xb1

Also, after device has been restarted I've run the nrfutil command:

nrfutil device read --address 0x4000051C --direct

with output:

0x4000051C: 000000B1                              |....|

So this makes me thing the register was set correctly, but there is no effect from it?

Kind regards.

[Vidar Berg]

Hi,

Thanks for confirming. Not sure why the bootloader is not entering DFU mode on startup then. Do you see if the nRF5 SDK bootloader is being entered on startup?