RE: DFU Bootloader Requires Reintialization of SD after Soft Reset

Hung Bui — Fri, 13 Feb 2015 12:07:04 GMT

If you use SDK v7.x it's located here: SDKv7.2\examples\ble_peripheral\ble_app_hrs\pca10028\experimental_s110_with_dfu\arm

RE: DFU Bootloader Requires Reintialization of SD after Soft Reset

Lucas — Wed, 11 Feb 2015 23:10:37 GMT

where is this example project

RE: DFU Bootloader Requires Reintialization of SD after Soft Reset

Hung Bui — Tue, 10 Feb 2015 14:18:02 GMT

Hi Lucas,

Do you plan to keep bonding information when in DFU mode ? (to encrypt the link using the bond information that you used in the normal application ) If you don't plan to and just want to use DFU OTA without bonding, what you are doing now is just fine.

What we plan when mentioned "Soft reset from application must not reinitialize the SoftDevice." was because of the implementation in the buttonless example (ble_app_hrs dfu example). That we don't do a full reset but only jump from application to the Bootloader, keeping the softdevice still initialized and that's why you should not do a softdevice initialize again when in bootloader. Please have a look at the bootloader_start() function in dfu_app_handler.c file in ble_app_hrs_with_dfu_experimental project.

The reason we avoid a reset is to be able to pass bond information via RAM memory from application to bootloader.