We are using the secure BLE bootloader from the nrf52 SDK versio 15.2. We did put in our own key files, but other than that I think that I don't think we changed much in the bootloader.
When the bootloader runs and starts the new application, is there any way to tell from the application that the bootloader just ran?
I was kind of hoping that the bootloader would set some bits in either GPREGRET or GRPRET2 that I could check in the app at startup, but it seems like the stock bootloader doesn't do anything like that.
Is there any other register that I could check to determine whether the app is being launched by the bootloader?
I know that I could modify the bootloader to set some bits in the GPREGRET/2 register, but we already have devices in the field and I would rather not have to reprogram the bootloader before reprogramming the application.
thanks!
additional information:
device: nrf52832_xxAA
softdevice: s132_nrf52_6.1.0_softdevice
sdk version: 15.2.0
unfortunately, in the sdk_config.h file for the bootloader, NRF_DFU_SAVE_PROGRESS_IN_FLASH is set to 0
