SNIP_CLASSIC_FRIF_SECTION_7_3_FlexRay_Interface_State_Machine

7.3 FlexRay Interface State Machine [SWS_FrIf_05115] ⌈In order to allow to control the communication operations of the FlexRay system, the FrIf module shall implement a behavior, which is defined using a simple state machine (one per FlexRay cluster), called FlexRay Interface State Machine⌋ Initial FRIF_STATE_OFFLINE FRIF_STATE_ONLINE (2) (3) (1) Figure 7.4: FlexRay Interface State Machine State Description FRIF_STATE_OFFLINE No communication services are executed (see Section 7.6 for details) FRIF_STATE_ONLINE All communication services (reception, transmission, transmission confirmation) are executed (see Section 7.6 for details). Table 7.1: FlexRay State Machine Transitions (1) [SWS_FrIf_05117] Upstream requirements: SRS_Fr_05031 ⌈During initialization of the FrIf by executing FrIf_Init() the FrIf_State for each cluster shall be initialized with state ’FRIF_STATE_OFFLINE’. The transitions are requested by an API service FrIf_SetState() which takes the Cluster to process on and the Transistion name to invoke.⌋ [SWS_FrIf_05118] ⌈If the FrIf module’s environment calls the function FrIf_SetState with parameter FrIf_StateTransition = FRIF_GOTO_ONLINE and if the current state for the requested cluster is FRIF_STATE_OFFLINE, the FrIf module shall take the current state of the requested cluster to FRIF_STATE_ONLINE.". If the FrIf module’s environment calls the function FrIf_SetState with parameter FrIf_ StateTransition = FRIF_GOTO_ OFFLINE and if the current state for the requested cluster is FRIF_STATE_ONLINE, the FrIf module shall take the current state of the requested cluster to FRIF_STATE_OFFLINE.". Otherwise, do not perform a state transition.⌋ For details see Figure 7.4 and Table 7.2 Transition Name Transitions (see Figure 7.4) Description FRIF_GOTO_ONLINE (2) Transition resulting in FrIf_State FRIF_ STATE_ONLINE FRIF_GOTO_OFFLINE (3) Transition resulting in FrIf_State FRIF_ STATE_OFFLINE Table 7.2: FlexRay State Machine Transitions (2) [SWS_FrIf_05501] ⌈If the API FrIf_SetState with parameter FRIF_STATE_OFFLINE is called, the FlexRay Interface module shall check the parameter "TxConfCounter" for every PDU. If the value for the corresponding PDU is greater than 0, the FlexRay Interface shall call the upper layer using the API LSduR_FrIfConfirmation(id, E_NOT_ OK).⌋ Note: It has to be ensured that the FlexRay Interface does not lose the TxConfCounter values at the point in time the API FrIf_SetState with parameter FRIF_STATE_OFFLINE is called.