Страница 1 мировой engineering стандарты общая спецификация

9.3.2.4.5.1 Pseudo Code. 
(Refer to the data dictionary of the application implementation of this service for
variable definitions.)
BEGINFUNCTION Boot _28_Msg_Recvd()
Service_28_MsgReceived ←
YES
TesterPresent_Timer_State ←
ACTIVE
IF (diagnostic_responses_enabled = YES) THEN
Send ($68) response message
ENDIF
ENDFUNCTION
9.3.2.4.6 Service $34 - Request to Download Data Block. 
Receipt of a valid request for this service causes
an SPS_TYPE_A ECU to transfer program control back to the boot software. Transferring control back to the
boot software allows the ECU to allocate the necessary resources to support being reprogrammed. Examples
of resource allocation include a larger buffer for the Network layer and use of a smaller STmin value to
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Page 258
GM WORLDWIDE ENGINEERING STANDARDS
GMW3110
optimize data transfer. The ECU shall support in the boot software the same dataFormatIdentifier values as
supported by the operational software.
9.3.2.4.6.1 Pseudo Code 
(Refer to the data dictionary of the application implementation of this service for
variable definitions.)
BEGINFUNCTION Boot_34_Msg_Recvd()
IF ( (dataFormatIdentifier is invalid) OR ((dataFormatIdentifier != $00) AND (unCompressedMemory size is
invalid)) ) THEN
send Negative Response($7F $34 $12) /* Invalid Format */
ELSE
IF ( (programming_mode_active = NO) OR (a software or calibration module download is in progress))
THEN
send Negative Response ($7F $34 $22) /* for conditionsNotCorrect */
ELSE

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IF (more than P2
C 
ms is needed to process this request) THEN
send Negative Response ($7F $34 $78) /* RequestCorrectlyReceived-ResponsePending */
ENDIF
/* at this time the module shall do whatever is necessary to prepare for a DataTransfer service
request. */
IF (DTC for Flash or EEPROM checksum failure is set) THEN
send Negative Response ($7F $74 $99) /*ReadyForDownload-DTCStored */
ELSE
send ($74) response message
TransferData_Allowed ←
YES
ENDIF
ENDIF
ENDFUNCTION