SNIP_CLASSIC_FR_SECTION_7_6_5_6_PREP_ARE_LPDU

7.6.5.6 PREPARE_LPDU The Communication Operation PREPARE_LPDU enables hardware optimization purposes (hardware buffer re-configuration) [SWS_FrIf_05294] ⌈The Communication Operation PREPARE_LPDU performs the following steps: 1. Call the FlexRay Driver’s API function Fr_PrepareLPdu(): • Fr_CtrlIdx is derived according to the indexing scheme described in chapter of indexing. • Fr_LPduIdx is set to the configured L-PDU index [Configuration Parameter FrIfLPduIdx, see FrIf06058] associated with the Communication Operation. ⌋ [SWS_FrIf_05061] Upstream requirements: SRS_Fr_05042 ⌈The Communication Operation PREPARE_LPDU enables hardware optimization purposes. Its purpose is to enable certain FlexRay CC hardware resources (e.g. a CC’s message buffer) to be prepared (configured) for the transmission/reception of a certain L-PDU. This Communication Operation enables the FlexRay Driver to optimize the usage of hardware resources if available at appropriate point of times. However, it is the responsibility of the FlexRay Driver to decide and validate ressource allocation optimizations based on the PREPARE_LPDU Communication Operations. Practically the usage of this Communication Operation will introduce some runtime-overhead even if the Flex Ray Driver does not use the opportunity for reconfiguration.⌋