Страница 1 мировой engineering стандарты общая спецификация

CPID_Array[].CPID
This variable is the CPID Identifier number
$01 to $FE
CPID_Array[].Security
This is a flag used to track whether or not a CPID requires security access
before allowing the activation of any of the functions controllable via this CPID.
YES/NO
CPID_Array[].Length
This variable defines the expected number of bytes for a given CPID. It is used
to compare against the number of control bytes in the request message to
validate that the request is correctly formatted.
$00 to $05
CPID_Array[].SecurityCodeAccess
This is a flag used to track whether or not a CPID requires security code
access before allowing the activation of any of the functions controllable via this
CPID.
YES/NO
Page 244
GM WORLDWIDE ENGINEERING STANDARDS
GMW3110
Variable/Meaning
Values
Secure_CPID
This is a flag which is used to keep track of whether or not the requested CPID
is one which requires security access.
YES/NO
Valid_CPID_Data_Length
This is a flag which is used to keep track of whether or not the number of
control bytes in the request message is valid.
YES/NO
Valid_Msg_Length
This is a flag used in the initial message length check which verifies that the
request is a single frame and includes at least a CPID number.
YES/NO
SecurityCodeAccess_CPID
This is a flag which is used to keep track of whether or not the requested CPID
is one which requires security code access.
YES / NO
8.20.6.2 Node Interface Pseudo Code.
Powerup States:
Set all the individual device control status flags to FALSE
The following logic is executed each time a Mode $AE message is received by the device:
BEGINFUNCTION Serv_AE_Msg_Recvd()
IF ((message_data_length > 7) OR (message_data_length < 2)) THEN
send Negative Response ($7F $AE $12) /* Invalid Format.*/
Valid_Msg_Length ←
NO
ELSE
Valid_Msg_Length ←
YES
Valid_CPID ←
NO
Secure_CPID ←
NO
Valid_CPID_Data_Length ←
NO
FOR (CPID_Index ←
$00 TO (Num_Supported_CPIDs - $01) BY $01)
IF (CPID_Array[CPID_Index].CPID = $CPID) THEN
Valid_CPID ←
YES
IF (CPID_Array[CPID_Index].Security = YES) THEN
Secure_CPID ←
YES
ENDIF
IF (CPID_Array[CPID_Index].SecurityCodeAccess = YES) THEN
SecurityCodeAccess_CPID ←
YES
ENDIF
IF (CPID_Array[CPID_Index].Length=(message_data_length-$02)) THEN

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Valid_CPID_Data_Length ←
YES
ENDIF
CPID_Index ←
Num_Supported_CPIDs
ENDIF
ENDFOR
ENDIF
IF (Valid_Msg_Length = YES) THEN