Страница 1 мировой engineering стандарты общая спецификация

Table 143: TransferData Positive Response Example
T = Frame Sent By Tester, N = Frame Sent By Node; shaded region indicates PCI
Frame Type CAN Id
#1
#2
#3
#4
#5
#6
#7
#8
T(USDT-FF)
$241
$10
$FF
$36
$80
$00
$23
$FF
aa
N(USDT-FC)
$641
$30
$00
$00
---
---
---
---
---
T(USDT-CF)
$241
$21
bb
cc
dd
ee
ff
gg
hh
:
T(USDT-CF)
$241
$2x
ww
xx
yy
zz
---
---
---
N(USDT-SF)
$641
$03
$7F
$36
$78
---
---
---
---
:

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WORLDWIDE ENGINEERING STANDARDS General Motors Local Area Network Enhanced Diagnostic Test Mode Specification
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© Copyright 2010 General Motors All Rights Reserved
February 2010
Page 165 of 336
N(USDT-SF)
$641
$01
$76
---
---
---
---
---
---
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Page 166
GM WORLDWIDE ENGINEERING STANDARDS
GMW3110
8.13.5.2 TransferData Negative Response Example (ECU Uses 2 Byte Address). 
The following example
(Table 144) assumes:
•
The node uses 2-byte addressing (e.g., startingAddress is 2 bytes).
•
The node targeted is programmable.
•
The node has security unlocked.
•
Mode $28 is already active.
•
Mode $A5 is already active (programming mode enabled).
•
A Mode $34 request was sent and a positive response resulted.
•
The starting address ($23 $FF) plus the number of data bytes all fall into valid ECU memory address
space.
•
The programming routines are executing and the address space to be written to has already been erased.
The tester is now sending data to be written to permanent memory with the download transfer type
(sub-function = $00).
•
The data (dataRecord[]) to be transferred contains 250 bytes of data (so message_data_length = 250 + 4
or 254 bytes. The 4 bytes come from the Service ID plus the sub-function parameter byte plus the 2-byte
startingAddress).
•
It takes the node longer than P2
C 
ms to completely download and write the data block (so the node sends
a negative response with response code $78 to indicate to the tester that the final response shall be sent
within the P2
CE* 
enhanced programming timing window). While writing the data to permanent memory, the
ECU detects an error so it sends a negative response to indicate that the programming failed.
•
The target node physical request CANId is $241.
•
The target node USDT physical response CANId is $641.
•
The USDT flow control parameters Block Size (BS) and Separation Time (ST) are both $00.
•
TesterPresent messages are sent (but not shown in the example).