SNIP_CLASSIC_DEM_FIGURE_Figure_7_48

Figure 7.48: Buffer format used by Dem_GetNextFreezeFrameData Note: The data returned include the DTCSnapshotRecordNumber (RecordNum) and DTCSnapshotRecordNumberOfIdentifiers (Num of DIDs) as defined by ISO-14229- 1[2] for the response message to service 0x19 0x04. In contradiction to the Dcm PIDstructure handling, the DIDstructure is handled within the Dem module. Therefore, the Dem returns already full freeze frame records according to the response layout. This results in an optimized Dem/Dcm interface. [SWS_Dem_00630] ⌈If a single DTC is selected and the API Dem_SelectFreezeFrameData is called with a valid RecordNumber which is not stored, Dem_GetNextFreezeFrameData shall return E_OK and BufSize 0 (empty buffer). ⌋ [SWS_Dem_00074] Upstream requirements: RS_Diag_04205 ⌈The function Dem_GetSizeOfFreezeFrameSelection shall return the size of the requested freeze frame record(s) by Dem_SelectFreezeFrameData for the specified ClientId, which represents the number of user data bytes, including any freeze frame headerinformation (according to the format defined in [SWS_Dem_00071]). ⌋ Note: If the record number value 0xFF is requested, the Dem considers the size of all stored freeze frame records according to [SWS_Dem_00074]. [SWS_Dem_01389] Requested size for not configured snapshot records Upstream requirements: RS_Diag_04205 ⌈If Dem_GetSizeOfFreezeFrameSelection is called and the selected freeze frame record number is not configured, the Dem shall return DEM_NO_SUCH_ELEMENT.⌋ [SWS_Dem_01348] Select freeze frame data for single DTCs only Upstream requirements: RS_Diag_04244 ⌈In case the function Dem_SelectFreezeFrameData is called and the DTC selected by Dem_SelectDTC is not a single DTC but a group of DTC, the Dem shall return DEM_WRONG_DTC.⌋