Failsafe module

Use the failsafe module to erase the Settings partition after a fatal error. This can be done to prevent broken settings from rendering the device permanently unusable.

Module Events

Source Module	Input Event	This Module	Output Event	Sink Module
Source modules for module_state_event	module_state_event	failsafe
			module_state_event	Sink modules for module_state_event

Note

See the Overview: Firmware architecture for more information about the event-based communication in the nRF Desktop application and about how to read this table.

Configuration

Use the CONFIG_DESKTOP_FAILSAFE_ENABLE option to enable the module.

Additionally, make sure that the following options are set as follows:

• CONFIG_WATCHDOG - The watchdog must be enabled.

• CONFIG_RESET_ON_FATAL_ERROR - The reset on fatal error must be disabled.

This is to ensure that the device will be blocked after a fatal error and then the watchdog will trigger the reboot.

After the reboot caused either by the watchdog or by the CPU lockup, the failsafe module erases the settings partition and clears the non-volatile settings data.