Hi,
I press Button 1 and Reset to put the nRF52840 DK in to DFU mode that is programmed with a immutable bootloader (B0), mcuboot, and application. This works well to update the application (app_update.bin) using mcumgr over USB. However, during the mcuboot update (signed_by_mcuboot_and_b0_s1_image_update.bin), the application area is over-written and the application enters in a infinite loop after reset. I verified the over-write by reading the flash memory using the nRF programmer.
Since mcumgr doesn't accept an address or slot parameter, I think the DFU mode is initialized with the application address.
Are there different ways to enter the DFU mode to update the application and to update the mcuboot?
Thanks,
Ram
