Страница 1 мировой engineering стандарты общая спецификация

Page 259
GM WORLDWIDE ENGINEERING STANDARDS
GMW3110
BEGINFUNCTION Boot_3E_Background_Logic()
IF (TesterPresent_Timer_State = ACTIVE) THEN
increment TesterPresent_Timer by the length of the main processing loop
IF (TesterPresent_Timer ≥ P3
C
) THEN
Call Boot_Exit_Diagnostic_Services() /* function in service $20 */
ENDIF
ENDIF
ENDFUNCTION
9.3.2.4.10 Service $A2 - ReportProgrammedState. 
The ReportProgrammedState is used by the tester to
determine which nodes on the link are programmable, and the current programmed state of each
programmable node. This service is also used as part of the sequence to enable the SPS_Prime CAN
Identifiers for SPS_TYPE_C ECUs.
While operating in boot, the ECU shall evaluate the Presence Pattern at the time of the Service $A2 request to
report the current programmed state of the ECU.
9.3.2.4.10.1 Pseudo Code. 
(Refer to the data dictionary of the application implementation of this service for
variable definitions.)
The following logic is executed when a device powers up or reboots after a software reset:
Check memory for errors
Check for operational software and calibrations
Store result of memory, software and calibration checks in $programmedState

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IF (permanent diagnostic CAN Identifiers are programmed) THEN
diagnostic_responses_enabled ←
YES
ELSE
diagnostic_responses_enabled ←
NO
ENDIF
Note: 
If the program operation is transferred from the operational software to the boot software when the
service $34 is received, the permanent diagnostic CAN Identifiers must be made available to the boot
software. See requirement in paragraph 9.3.2.3.7. In this case, the flag diagnostic_responses_enabled shall be
set to YES for the purposes of the pseudo code.
BEGINFUNCTION Boot_A2_Msg_Recvd()
diagnostic_responses_enabled ←
YES
IF (calculation for programmedState is not complete)
send negative response ($7F $A2 $78 ..)
ENDIF
IF (memory fault exists)
send a ($E2 $programmedState) /* memory faults shall be reported first */
ELSE IF (only calibration data is missing)
send ($E2 $02)
ELSE IF (software and calibrations are missing)
send ($E2 $01)
ELSE
send ($E2 $00) /* this can occur if a request is sent to determine the programmed state after the ECU is
programmed but before the software reset occurs concluding part 1 of the utility file */
ENDIF
ENDFUNCTION