SNIP_CLASSIC_ECUM_SECTION_7_7_Shutdown_Targets

7.7 Shutdown Targets "Shutdown Targets" is a descriptive term for all states ECU where no code is executed. They are called shutdown targets because they are the destination states where the state machine will drive to when the UP phase is left. The following states are shutdown targets: • Off8 • Sleep • Reset Note that the time at which a shutdown target is or can be determined is not necessarily the start of the shutdown. Since the BswM now controls most ECU resources, it will determine the time at which the shutdown target should be set and will set it, either directly or indirectly. The BswM must therefore ensure that, for example, the shutdown target must be changed from its default to ECUM_STATE_SLEEP before calling EcuM_GoDownHaltPoll. In previous versions of the ECU Manager module, sleep targets were treated specially, as the sleep modes realized in the ECU depended on the capabilities of the ECU. These sleep modes depend on hardware and differ typically in clock settings or other low power features provided by the hardware. These different features are accessible through the MCU driver as so-called MCU modes (see [10] ). There are also various modalities for performing a reset which are controlled, or triggered, by different modules: • Mcu_PerformReset • WdgM_PerformReset • Toggle I/O Pin via DIO / SPI The ECU Manager module offers a facility to manage these reset modalities by to tracking the time and cause of previous resets. The various reset modalities will be treated as reset modes, using the same mode facitlities as sleep. Refer to section 8.3.4 Shutdown Management for the shutdown management facility’s interface definitions. 8The OFF state requires the capability of the ECU to switch off itself. This is not granted for all hardware designs.