SNIP_CLASSIC_CAN_SECTION_7_2_Driver_State_Machine

7.2 Driver State Machine The Can module has a very simple state machine, with the two states CAN_UNINIT and CAN_READY. 7.1 shows the state machine. [SWS_Can_00103] Upstream requirements: SRS_BSW_00406 ⌈After power-up/reset, the Can module shall be in the state CAN_UNINIT.⌋ CAN_UNINIT CAN_READY Initial Can_Init() Can_DeInit() Figure 7.1: Driver State [SWS_Can_00246] Upstream requirements: SRS_SPAL_12057, SRS_Can_01041 ⌈The function Can_Init shall change the module state to CAN_READY, after initializing all controllers inside the HW Unit.⌋ [SWS_Can_00245] Upstream requirements: SRS_SPAL_12057, SRS_Can_01041 ⌈The function Can_Init shall initialize all CAN controllers according to their configuration.⌋ Each CAN controller must then be started separately by calling the function Can_SetControllerMode(CAN_CS_STARTED). Implementation hint: Hardware register settings that have impact on all CAN controllers inside the HW Unit can only be set in the function Can_Init. Implementation hint: The ECU State Manager module shall call Can_Init at most once during runtime. [SWS_Can_91009] Upstream requirements: SRS_Can_01166 ⌈The function Can_DeInit shall change the module state to CAN_UNINIT before de-initializing all controllers inside the HW unit⌋ Refer to [SWS_Can_91010].