AVT AVT-718 User manual

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1
ADVANCED VEHICLE TECHNOLOGIES, Inc. AV
inc.
AVT-718
Multiple Interface
RS-232 or RS-422 Unit
User’s Manual
1509 Manor View Road
Davidsonville, MD 21035
410-798-4038 (voice) 410-798-4308 (fax)
www.AVT-HQ.com
[email protected] Revision ‘C1’
19 October 2004
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TABLE OF CONTENTS
1. INTRODUCTION.........................................................................................................................................................4
1.1 SPECIFICATIONS..............................................................................................................................................................5
1.2 DEFINITIONS...................................................................................................................................................................5
2. CONNECTING & USING............................................................................................................................................6
2.1 SETTING THE BAUD RATE...............................................................................................................................................6
2.2 CONNECTIONS................................................................................................................................................................7
2.3 RS-232 OR RS-422 ........................................................................................................................................................7
2.4 COMMUNICATIONS WITH THE HOST COMPUTER.............................................................................................................7
3. INTERFACE HARDWARE.........................................................................................................................................8
3.1 INTRODUCTION...............................................................................................................................................................8
3.2 OVERVIEW .....................................................................................................................................................................8
3.3 MICROCONTROLLER.......................................................................................................................................................8
3.4 FLASH ..........................................................................................................................................................................9
3.5 RAM..............................................................................................................................................................................9
3.6 FIFO’S...........................................................................................................................................................................9
3.7 SCC ...............................................................................................................................................................................9
3.8 CAN...............................................................................................................................................................................9
3.9 J1850 VPW .................................................................................................................................................................10
3.10 J1850 PWM...............................................................................................................................................................10
3.11 KWP 2000.................................................................................................................................................................10
3.12 UBP...........................................................................................................................................................................10
3.13 LIN ............................................................................................................................................................................10
3.14 MICROSECOND CLOCK ...............................................................................................................................................12
4. AVT-718 OPERATION..............................................................................................................................................12
4.1 INDICATORS..................................................................................................................................................................12
4.2 RS-232.........................................................................................................................................................................12
4.3 RS-422.........................................................................................................................................................................13
4.4 VEHICLE NETWORKS....................................................................................................................................................13
5. COMMUNICATIONS................................................................................................................................................13
5.1.1 Packet Construction.............................................................................................................................................13
5.1.2 Transmit message format.....................................................................................................................................14
5.1.2.1 Transmit Acknowledgment ............................................................................................................................................. 14
5.1.3 Transmit Message Status Byte Definitions...........................................................................................................15
5.1.3.1 Transmit message example.............................................................................................................................................. 15
5.1.4 Receive message format.......................................................................................................................................15
5.1.4.1 Received message time stamping .................................................................................................................................... 15
5.1.4.2 Received message example ............................................................................................................................................. 16
5.1.5 Received Message Status Byte Definitions...........................................................................................................16
5.1.6 More Examples ....................................................................................................................................................16
5.1.7 Alternate Header Formats ...................................................................................................................................17
5.2 VPW MODE.................................................................................................................................................................18
5.3 PWM MODE ................................................................................................................................................................18
5.3.1 PWM Active Node................................................................................................................................................18
5.3.2 PWM Passive Network Monitor...........................................................................................................................18
5.3.3 PWM “Look Alike”..............................................................................................................................................19
5.4 KWP MODE.................................................................................................................................................................19
5.5 CAN MODE..................................................................................................................................................................20
5.6 UBP MODE..................................................................................................................................................................20
5.7 MATCH FUNCTION - MESSAGE FILTERING....................................................................................................................20
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5.8 STATUS AND ERROR CODES .........................................................................................................................................21
6. TECHNICAL INFORMATION ................................................................................................................................21
6.1 REFERENCE DOCUMENTATION.....................................................................................................................................21
6.2 TECHNICAL SUPPORT ...................................................................................................................................................22
6.3 AVT-718 HARDWARE INFORMATION...........................................................................................................................22
6.3.1 Fuse F1 ................................................................................................................................................................22
6.3.2 Jumper Block JP1 ................................................................................................................................................23
6.3.2.1 AVT-718 PC board revision levels “A” to “F” ............................................................................................................... 23
6.3.2.2 AVT-718 PC board revision level “G”............................................................................................................................ 23
6.3.2.3 AVT-718 PC board revision level “AA”......................................................................................................................... 24
6.3.3 Jumper JP2 ..........................................................................................................................................................28
6.3.4 Connector P1 .......................................................................................................................................................28
6.3.5 Connector P2 .......................................................................................................................................................28
6.3.6 Connector P3 .......................................................................................................................................................29
6.3.7 Connector P4 .......................................................................................................................................................31
6.4 AVT-718 ENCLOSURE .................................................................................................................................................33
7. COMPANY OVERVIEW...........................................................................................................................................33
FIGURE 1 AVT-718 BLOCK DIAGRAM ..............................................................................................................................11
FIGURE 2 DIAGRAM OF JP1 (BOARD REVISIONS “A” TO “F”)............................................................................................25
FIGURE 3 DIAGRAM OF JP1 (BOARD REVISION “G”).........................................................................................................26
FIGURE 4 DIAGRAM OF JP2 ...............................................................................................................................................28
TABLE 1 DEFAULT CONFIGURATION OF JP1 (BOARD REVISIONS “A” TO “F”) ..................................................................25
TABLE 2 DEFAULT CONFIGURATION OF JP1 (BOARD REVISION “G”)................................................................................26
TABLE 3 DEFAULT CONFIGURATION OF JP1 (BOARD REVISION “AA”).............................................................................27
TABLE 4 RS-232 BAUD RATE SELECTION.........................................................................................................................28
TABLE 5 CONNECTOR P3 (REVISIONS “A” TO “G”)..........................................................................................................30
TABLE 6 CONNECTOR P3 (REVISIONS “AA” AND LATER).................................................................................................31
TABLE 7 P4 PIN DESCRIPTIONS, RS-232..........................................................................................................................32
TABLE 8 P4 PIN DESCRIPTIONS, RS-422..........................................................................................................................32
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1. INTRODUCTION
This manual covers the AVT-718 Multiple Protocol Interface unit. It provides technical information
on using the interface, connections to it, communications with it, and other related information.
The AVT-718 Multiple Protocol Interface supports the following network protocols.
• CAN (Controller Area Network).
CAN-B (ISO 11519).
CAN-C (ISO 11898).
Single Wire CAN (SWC) (SAE J2411) support.
• J1850 VPW
GM Class 2 compliant.
• J1850 PWM
Ford SCP compliant.
• Keyword Protocol 2000 support
ISO 14230 and ISO 9141.
• Ford UBP (UART Based Protocol).
• LIN support.
The AVT-718 Hardware package (order number: 718-002) consists of the AVT-718
Multiple Interface board housed in rugged enclosure and a 9-pin serial cable.
All documentation is available from our web site at:
www.AVT-HQ.com/download.htm.
The AVT-718 OEM module (order number: 718-003) consists of the AVT-718 Multiple Interface
board with a set of mounting brackets attached.
All documentation is available from our web site at:
www.AVT-HQ.com/download.htm.
Operations in CAN mode are compatible with ISO 11898, J1939, ISO 11512, ISO 15765 and other
related specifications.
Operations in J1850 VPW mode conform to specification J1850 and GM Class 2 requirements.
Operations in J1850 PWM mode conform to specification J1850 and Ford SCP (Standard Corporate
Protocol) requirements.
Operations in UBP mode conform to Ford Motor Company UBP requirements.
Operations in LIN mode conforms to LIN specification 1.2.
Refer to updated documentation, manual supplements, and other engineering notes found on our
web site for up-to-date hardware and firmware information about this product. Contact us for
specific information on current status of this unit.
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The AVT-718 Multiple Interface provides the following functions:
• Isolated electrical interface between the network and the control computer.
• Protocol/data conversion between a vehicle based network and the host computer
(via a serial communications link).
• Active network node.
• Passive network traffic monitor.
1.1 Specifications
AVT-718 Multiple Interface (in enclosure)
• Overall size (inches): 7.3 x 6.1 x 2.0.
• Weight: 18 oz.
• Operating temperature range: 0 to +70 degrees C.
• +12 volts (nominal) from subject vehicle.
• Input voltage range: +9.0 VDC to +30.0 VDC.
• Power dissipation: 3.0 watts (nominal).
AVT-718 Multiple Interface (OEM board)
• Overall size (inches): 7.6 x 5.7 x 0.7.
• Weight: 8 oz.
• Operating temperature range: 0 to +70 degrees C.
• +12 volts (nominal) from subject vehicle.
• Input voltage range: +9.0 VDC to +30.0 VDC.
• Power dissipation: 3.0 watts (nominal).
MTBF (Mean Time Between Failure)
• MTBF information has not been discovered for many components used on the AVT-718
Multiple Interface board. The known values follow:
♦ Relays (all except K4 and K5): 500 million operations.
♦ Relays (K4 and K5 only): 200 million operations.
♦ Toggle switch, S1: 40,000 cycles.
♦ DC/DC converter, U32: 4.4 million hours.
♦ DC/DC converter, U39: 1.0 million hours.
1.2 Definitions
The following terms are used in this manual.
• CAN: Controller Area Network.
• CAN-C: Physical layer name for ISO 11898 compliant hardware interface.
• CAN-B: Physical layer name for ISO 11512 compliant hardware interface.
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• CRC: Cyclic Redundancy Check.
• DLC: Data Link Controller. [Motorola term, VPW]
• HBCC: Hosted Bus Controller Chip. [Ford device, PWM]
• KWP: Keyword Protocol 2000 (ISO 14230).
• SCC: Serial Communications Controller. [A dual UART device]
• SCI: Serial Communications Interface. [Motorola term]
• SCP: Standard Corporate Protocol. [Ford Motor Company]
• SWC: Single Wire CAN. [J2411]
• UBP: UART Based Protocol. [Ford Motor Company unique]
• All numbers used in this manual are hexadecimal digits (0 .. 9 and A .. F) and are usually
preceded with a dollar sign ($) for clarity.
2. Connecting & Using
Prior to using the AVT-718 the baud rate of the serial link between it and the host computer must be
properly set. The interface must then be connected to both the subject vehicle and the host
computer.
2.1 Setting the Baud Rate
The AVT-718 serial interface (to the host computer) can be configured for one of four baud rates:
• 19.2 kbaud
• 38.4 kbaud
• 57.6 kbaud
• 115.2 kbaud
The factory default setting for the AVT-718 is 19.2 kbaud.
Regardless of baud rate, all communications between the host computer and the AVT-718 unit is
standard UART serial, in binary format (not ASCII hex), 10 bit frame, 1 start bit, 8 data bits, no
parity, one stop bit.
Hardware handshaking in the form of RTS / CTS signaling is used between the AVT-718 and the
host computer. This method of flow control prevents loss and/or corruption of data in
communications between the AVT-718 and the host computer.
All communications between the AVT-718 and the host computer is in binary bytes
(not ASCII hex digits).
The baud rate is determined by setting two shunts on JP2 on the AVT-718 board.
Refer to Section 6.3.3 for details on setting the shunts and a diagram of JP2.
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2.2 Connections
Initial use and testing require that the AVT-718 be connected to a power supply and the host
computer serial port. Refer to Sections 6.3.2, 6.3.6, and 6.3.7 for pin assignments of the AVT-718
connectors.
The external power source should be a nominal +12v (minimum of +9.0v and maximum of +30.0v).
It is recommended that the serial cable (provided with the “hardware” package, #718-002) be used
during initial testing. Serial communications between the AVT-718 and the host computer utilize
RTS/CTS hardware handshaking - all relevant pins must be connected.
No other equipment or connections are required to get the unit up and running and establish
communications between the AVT-718 and the host computer.
2.3 RS-232 or RS-422
Communications with the host computer are via a serial communications link. The AVT-718 is
configured at the factory for either RS-232 or RS-422 for the communications link to the host
computer.
It is not recommended that the user attempt to change the configuration “in the field.”
To identify which configuration an AVT-718 is set for, look on the AVT-718 PC board, near the
DE-9S connector. Locate devices U37 and U40.
• If U37 is installed then the unit is set for RS-232 operations.
• If U40 is installed then the unit is set for RS-422 operations.
At no time should both devices be installed.
There are other minor differences between the two configurations; some resistors are either
installed or not installed.
Contact the factory if you require additional information about the configuration of an AVT-718.
2.4 Communications with the Host Computer
Once the hardware connections have been made, proper operation of the hardware can be observed.
• On the host computer use a binary communications program.
[Contact the factory for a free copy of our “Hex Terminal” software.
Hex terminal software is available for DOS, Win3.1x, and Win98/NT.]
• Set the parameters of the communications program appropriately (as determined by the
configuration of the AVT-718 interface).
• Turn on the AVT-718 interface unit.
• Observe on the AVT-718 board that the green (power) LED is lit.
• Observe that the red (operations) LED is blinking fast.
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• Observe on the computer that the following is received from the interface:
91 12 and 92 04 xx.
This is the ‘mode of operation’ report. $91 indicates that the message is a ‘board status
report’ with one byte to follow. The $12 indicates the interface is up and running at idle
awaiting a mode switch command. The $92 $04 $xx is the firmware version report, where
‘xx’ is the firmware version. Refer to the “Master Commands and Responses” document for
complete and up-to-date information.
Note: The AVT Controller software only displays and accepts hex digits, no dollar signs.
• At this point the AVT-718 hardware is operational.
3. Interface Hardware
The following sections provide a brief description of the hardware implementation of the AVT-718.
A block diagram of the AVT-718 Multiple Interface is shown in Figure 1.
Included on the block diagram are all signal assignments and pin numbers for JP1 and P3.
3.1 Introduction
The AVT-718 provides an isolated electrical interface between the control computer and the
connected vehicle network. The AVT-718 Interface can be connected directly to a vehicle and
derives its operating power from the vehicle. The serial interface to the host computer is electrically
isolated from the vehicle electrical and electronic systems. This is done to prevent damage to the
host computer due to spikes or surges from the vehicle electrical system. It is not recommended that
the control computer be connected directly to the vehicle electrical system.
The AVT-718 Multiple Interface performs the necessary data and protocol conversion functions as
well as many other functions that can be enabled or disabled by the user to meet specific application
needs.
3.2 Overview
The hardware is structured around a central microcontroller, including on-chip peripherals. The
microcontroller utilizes several off-chip peripheral devices: FLASH memory; RAM; FIFO’s;
serial communications controller (SCC); CAN controller; J1850 VPW DLC device; J1850 PWM
HBCC device; and a free running 24-bit microsecond clock.
Also included in the hardware are transceivers for the various network interfaces. These may be
unique devices or implementations using discrete components.
3.3 Microcontroller
The heart of the AVT-718 Multiple Interface is the Motorola 68332 microcontroller which contains
a CPU32 core. The microcontroller contains 2 Kbytes of on-board RAM as well as a number of
peripheral functions (chip select, SCI, SPI, TPU, etc.).
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The microcontroller currently runs at a bus speed of 16.777 MHz (which may be increased at a later
time). Firmware revision 3.0 and later increased the microcontroller speed to 20.972 MHz
3.4 FLASH
All operational firmware is contained in a 128 Kbyte FLASH (64 K x 16) device that is socket
mounted on the AVT-718 board.
All firmware on the AVT-718 Multiple Interface was developed by and is supported by Advanced
Vehicle Technologies, Inc.
The AVT-718 supports the ability to upgrade operational firmware in the field, without requiring the
removal/replacement of the FLASH device. Firmware routines exists in the FLASH device to
permit updating the AVT-718 operational firmware from the host computer via the serial data link;
without requiring the removal/replacement of the FLASH device.
Contact the factory if you want to update the firmware on your AVT-718 unit. We can supply,
by e-mail, the firmware file and a program to update the AVT-718 FLASH device. We can provide
a DOS and/or a Win95/98/NT/2000/XP program for the host computer to update the AVT-718
FLASH device.
3.5 RAM
8 Kbytes (8 K x 8) of RAM are provided by an external RAM device.
3.6 FIFO’s
Two high speed hardware FIFO’s are used by the microcontroller as buffers for transmit and receive
data moving between itself and the host computer. Each FIFO is 2 KBytes deep. One is used for
incoming data (from the host) and the other is used for outbound data (to the host).
3.7 SCC
Serial communications with the host computer is provided by one half of the Philips Serial
Communications Controller (SCC) device. The SCC is used to implement the standard serial data
link, including RTS/CTS hardware handshaking.
The host computer serial data link is electrically isolated from the rest of the AVT-718 Multiple
Interface unit. The RS-232 line drivers and receivers are contained in an electrically isolated section
of the AVT-718 board. Signals are coupled through optical isolators and power is supplied by an
isolated DC-DC converter.
3.8 CAN
CAN operations are supported by the Intel 82527 CAN Controller device.
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