Bootloader nRF52

[Arepa]

Hi all,

I am trying to "add" the DFU bootloader to my application and I have some questions regarding it:

my thought are:

1. add to DFU bootloader example code, part of my code adding the BLE capitability

-my code will run normally until the button is pressed to jump to the bootloader and perform the DFU

2. add the DFU service to my current project and add the device manager, and more required libraries.

which option is most viable?

Update 03/06/17:

Softdevice $132

SDK 12.2

How can I swith from my aplication to the bootloader?

Thanks

[Hung Bui]

Hi Arepa,

I don't think option 1 would be a very good one. With this option, you have to do "bootloader update" whenever you want to update your firmware. Application update option has no use. When you do bootloader update, you are limited to the size of the bootloader which is written in UICR and can't be changed.

Option 2 is much better one.

You should consider Option 1 only when you want to do background DFU, where you device functional normally when you are receiving DFU. But this requires lots of change in the bootloader and on how to integrate it with your application.

[Arepa]

Hi Hung,

I am using secure bootloader programing just the softdevice and the bootloader. The DFU works using my application with the public key I generated.

Inside my application itseft has nothing related to buttonless DFU so I am trying to jump to the bootloader to add buttonless DFU update or just initializate the bootloader_secure using the code I posted above (bad it only works for SDK11 and earlier :( ). Now I am looking at enter_bootloader() but it looks I have to include the ble_dfu to my project and the related items I want start the DFU bootloader from the application not using the DFU service.