app: main + fota: Split out FOTA controller logic into separate module

Splits out the FOTA controller logic from the main application into a
separate module, responsible for managing the FOTA state machine.
The main application now only triggers FOTA polls and reacts to
high-level FOTA outcomes published by the controller,
without needing to manage the details of the FOTA process.

Signed-off-by: Trond F. Christiansen <trond.christiansen@nordicsemi.no>

Author: Trond-F-Christiansen

app/CMakeLists.txt

@@ -28,4 +28,5 @@ add_subdirectory_ifdef(CONFIG_APP_LED src/modules/led)
 add_subdirectory_ifdef(CONFIG_APP_LOCATION src/modules/location)
 add_subdirectory_ifdef(CONFIG_APP_CLOUD src/modules/cloud)
 add_subdirectory_ifdef(CONFIG_APP_FOTA src/modules/fota)
+add_subdirectory_ifdef(CONFIG_APP_FOTA src/modules/fota_controller)
 add_subdirectory_ifdef(CONFIG_APP_STORAGE src/modules/storage)

app/Kconfig

@@ -13,6 +13,7 @@ rsource "src/modules/cloud/Kconfig.cloud"
 rsource "src/modules/location/Kconfig.location"
 rsource "src/modules/led/Kconfig.led"
 rsource "src/modules/fota/Kconfig.fota"
+rsource "src/modules/fota_controller/Kconfig.fota_controller"
 rsource "src/modules/environmental/Kconfig.environmental"
 rsource "src/modules/button/Kconfig.button"
 rsource "src/modules/storage/Kconfig.storage"

app/prj.conf

@@ -242,7 +242,7 @@ CONFIG_APP_STORAGE_LOG_LEVEL_DBG=y
 
 # Task Watchdog
 CONFIG_TASK_WDT=y
-CONFIG_TASK_WDT_CHANNELS=8
+CONFIG_TASK_WDT_CHANNELS=9
 CONFIG_TASK_WDT_MIN_TIMEOUT=10000
 
 # Device power management