General Specification Electrical Function gmw3110 General Motors Local Area Network Enhanced Diagnostic Test Mode Specification

GM WORLDWIDE ENGINEERING STANDARDS 
GMW3110 
© Copyright 2010 General Motors All Rights Reserved 
February 2010 
Page 225 of 336 
in order to determine whether its possible to execute the request 
*********************************************************************/ 
all_DPIDs_valid 

YES 
num_new_sched_DPIDs 

No_of_DPIDs 
Req_Index 

$00 /*local counter to traverse the DPIDs in request*/ 
REPEAT 
all_DPIDs_valid 

NO 
FOR (PDS_Index 

$00 TO (num_supported_DPIDs - $01) BY $01) 
IF (request_DPIDs[Req_Index] = supported_DPIDs[PDS_Index]) THEN 
all_DPIDs_valid 

YES 
PDS_Index 

num_supported_DPIDs 
ENDIF 
ENDFOR 
IF ((all_DPIDs_valid = YES) AND ($Level > LEV_SOR)) THEN 
FOR (PDS_Index 

$00 TO (PDS_Length - $01) BY $01) 
IF (request_DPIDs[Req_Index] = PDS[PDS_Index].DPID) THEN 
num_new_sched_DPIDs 

(num_new_sched_DPIDs - $01) 
PDS_Index 

PDS_Length 
ENDIF 
ENDFOR 
ENDIF 
Req_Index 

Req_Index + $01 
UNTIL ((all_DPIDs_valid = NO) OR (Req_Index = No_of_DPIDs)) 
IF (all_DPIDs_valid = NO) THEN 
Send Negative Response ($7F $AA $31) /*Request Out Of Range*/ 
Request_Valid 

NO 
ELSE IF (($Level > LEV_SOR) AND 
(num_new_sched_DPIDs > (PDS_Length - PDS_number_active))) THEN
/*the PDS would Overflow if the Request was Processed*/ 
Send Negative Response ($7F $AA $81) /*Scheduler Full*/ 
Request_Valid 

NO 
ENDIF 
ENDIF 
/********************************************************************* 
If Request Message is Valid, Process Service AA Message 
***********************************************************************/ 
IF (Request_Valid = YES) THEN 
SELECT FIRST 
WHEN ($Level = LEV_SS ) /* $00 Stop Sending Periodic Data */ 
IF (No_of_DPIDs!= $00) THEN /*Request includes DPID(s)*/ 
FOR (Req_Index 

$00 TO (No_of_DPIDs - $01) BY $01) 
FOR (PDS_Index 

$00 TO (PDS_Length - $01) BY $01) 
IF (request_DPIDs[Req_Index] = PDS[PDS_Index].DPID) THEN 
PDS[PDS_Index].DPID 

$00 
PDS_Number_Active 

(PDS_Number_Active - $01) 
PDS_Index 

PDS_Length 
ENDIF 
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