DPA III/i Manual version 2.06-r4
Contents
1. ID Optional If requested Protocol specific identifier received J1708 MID Message ID PID Parameter ID Note commas mean the above J1708 items are used in this command as two separate data parameters J1850 Format Target Source Note plus signs mean the above J1850 data values are joined in sequence and used in this command as one parameter J1939 29 bit CAN Identifier CAN 11 Bit CAN Identifier Data count Optional If requested the number of data bytes received Data Optional If requested this is the data received in a specified message If no data has been received since the Monitor mailbox was loaded then no data shall be returned 4 5 3 Load Monitor Protocol Examples Load J1708 mailbox 1 to monitor for MID 128 dec and PID and send only ID and up to 19 dec bytes of data from the Host Reminder commands require all parameters and data to be in hexadecimal However byte count and time stamp data is in decimal Command LM 1 1 80 44 00 00 0 06 19 lt CR gt Response MX 1 1 80 34 11 22 33 lt CR gt Load J1850 mailbox 4 to monitor for ID Format 48 hex Target 6B hex Source 1F hex Also send Timestamp 08h ID 04h Data count 01h and Data 02h to the Host This ANDed value is OFh Accept up to 8 data bytes Command LM 2 4 486B1F FFFFFF 0 0F 8 lt CR gt Response MX 2 4 12345 486B1F 4 11 22 33 44 lt CR gt Dearborn Group 23 Technology DPA III i U2. PT Pauses the timer and suspends transmits 4 7 3 Resume Timer command This command is used to resume the paused timer and resume transmission Command Syntax RT lt CR gt Command Parameters RT Resumes a previously paused timer function and restarts all transmits 4 7 4 Set Timer command This command is used to set the timer Command Syntax ST Value lt CR gt Command Parameters ST Sets the timer for the timestamping of received and transmitted messages Value Value to set as the current timer value The timer has a 1mS resolution and count wrapping occurs every 49 5 days Dearborn Group 30 Technology DPA III i USER S MANUAL 2004 48 General Commands The following general commands are available for use with the DPA III 1 e VR used to retrieve the version from the DPA III 1 e RESET used to reset the DPA III 1 4 8 1 Get Version command This command is used to retrieve the version stored in the DPA III 1 Command Syntax VR lt CR gt Command Parameters VR Retrieves the version string from the DPA III i Response Dearborn Industrial Version 2 05 J1708 J 850 J1939 SW CAN BUF4096 lt CR gt 4 8 2 Reset command This command is used to completely reset the DPA ITI 1 Command Syntax RESET lt CR gt Command Parameters RESET Used to execute a low level reset of the DPA II i It will perform a full reset of the hardware clearing all mailboxes a
3. with a 16 MHz crystal See Appendix A for CAN Bit timing register information Param0 is an unsigned character hex that will be loaded into the Intel 832527 s Bit Timing Register 0 See Appendix A Parami is an unsigned character hex that will be loaded into the Intel 82527 s Bit Timing Register 1 See Appendix A Param2 0 29 Bit preferred 29 Bit ID s will be double buffered 1 11 Bit preferred 11 bit ID s will be double buffered 3 29 Bit preferred with J1939 transport layer enabled Note User may enable any combination Param3 Mailbox used for RX TX commands Input the mailbox number in the lower nibble Default mailbox 0 b xxxx yyyy x don t care y mbox hex Dearborn Group CR Technology DPA III i USER S MANUAL 2004 Param4 Reserved 4 CAN 11 Bit ID Param0 amp Param are bit timing registers 0 amp 1 respectively as used on an Intel 82527 CAN controller with a 16 MHz crystal See Appendix A for CAN Bit timing register information Param0 is an unsigned character hex that will be loaded into the Intel 832527 s Bit Timing Register 0 See Appendix A Parami is an unsigned character hex that will be loaded into the Intel 82527 s Bit Timing Register 1 See Appendix A Param2 00h 29 Bit preferred 29 Bit ID s will be double buffered 01h 11 Bit preferred 11 Bit ID s will be double buffered 03h 29 Bit preferred with J1939 transport layer enabled 10
4. product upgrade information http www dgtech com techsupp tech phtml Dearborn Group Technology DPA III i USER S MANUAL 2004 2 0 Host Interface 2 1 Host Communication The communication between the DPA III i and the Host is composed of ASCII character strings followed by the carriage return character lt CR gt 0Dh Blank spaces are not permitted in these command strings This syntax must be followed for messages from the Host to the DPA III 1 and from the DPA III i to the Host All network data ID and Data are assumed to be in hexadecimal Note Byte Count and Timer values are in decimal 2 1 1 Quick Start Use the following simple steps as a guide to start using your DPA III 1 1 Confirm that the correct electrical connection is established between the Host and the DPA III i see Figures 1 and 2 2 Initialize the DPA II Jr using the NIT command see section 2 2 2 3 Initialize the protocol interface using the INIT command see section 4 1 1 4 Send a string of ASCII command characters defined in this document Note You can use HyperTerm or a similar program to send ASCII commands 2 2 Host Connection To communicate with a DPA III i the Host must meet the following requirements e Contain an available serial port e Operate at a standard BAUD rate e Support ASCII protocol e Have CTS RTS or XON XOFF flow control e Use wiring illustrations shown in Figure 1 and 2 Dearborn G
5. to 9600 with CTS RTS flow control INIT 0 3 1 1 0 lt CR gt Set Host Communication Baud rate to 19200 with Xon S 13h and Xoff Q 11h INIT 0 5 11 13 0 lt CR gt Set Host Communication Baud rate to 115K with No flow control and Ack s enabled INIT 0 9 0 0 1 lt CR gt Dearborn Group Technology DPA III i USER S MANUAL 2004 2 2 4 Save Serial Configuration Command This command saves the power up parameters of the serial configuration into the flash memory on the DPA III i These settings will not take effect until the DPA III i is power cycled or the reset command is used Command Syntax SSC Param0 Param1 Param2 Param3 lt CR gt Command Parameters SSC Save Serial Configuration command Param0 Baud 0 1200 1 2400 2 4800 3 9600 4 14400 5 19200 6 28800 7 38400 8 57600 9 115200 Parami Param2 0 No handshaking Both values 0 Parami Param2 0 RTS CTS handshaking Both values 1 Param1 Q and Param2 S Xon Xoff handshaking Param3 Ack Nak configuration Set to b xxxx xxx to enable 2 2 5 Save Serial Configuration Command Examples Power up at 115K baud RTS CTS flow control with Ack s enabled SSC 9 1 1 1 lt CR gt Dearborn Group Technology DPA III i USER S MANUAL 2004 3 0 Protocol Interface 3 1 Supported Protocols The DPA III i is configured to support the following SAE in vehicle network protocols J1708 J185
6. with 8 bytes of data TX 3 10780 11 22 33 44 55 66 77 88 lt CR gt Send CAN message with ID 123 hex with 5 bytes of data TX 4 123 11 22 33 44 55 lt CR gt Dearborn Group Technology DPA III i USER S MANUAL 2004 4 3 Receive The DPA III i will support the receiving of specific messages from all the different protocols The receive command allows the Host to obtain the latest data from a specific message When the DPA III i is programmed to receive a specific message it will monitor the specified link until the requested message is received and then it will send that data back to the Host computer The Host computer can only monitor one message for each protocol at a time The DPA III i will monitor for the specific message until either the message has been received or a new RX command is issued 4 3 1 Receive message command format This command is used to receive specific messages from different protocols Command Syntax RX Protocol ID Byte Count _ lt CR gt Command Parameters RX Receive command Protocol 1 J1708 2 J1850 3 J1939 29 Bit ID 4 CAN 11 Bit ID ID Protocol specific identifier to be received J1708 MID Message ID PID Parameter ID Note commas mean the above J1708 items are used in this command as two separate data parameters J1850 Format Target Source Note plus signs mean the above J1850 data values are joined in sequence and used
7. 0 J1939 CAN 29 Bit ID and CAN 11 Bit ID These protocols contain important vehicle status and control information that is useful to engineers technicians and others The DPA III i will communicate this information to and from the Host The bus protocol pin connections that are used by the DPA III i is illustrated in Figure 2 3 2 Protocol Connections OPTIONAL CONNECTING PIN 3 TO PIN 4 WILL INSERT A 120 OHM RESISTOR ACROSS CAN HI AND CAN LO FOR TERMINATION OF CAN LINK 1 9 2 SW CAN lt 19 4 CAN LO lt 1 J1850 lt e CAN HI lt 5 GND lt A J1708 lt S CAN SHIELD lt i J1708 lt z VEH PWR lt Figure 3 DPA III i Bus Protocol Pinouts Dearborn Group Technology DPA III i USER S MANUAL 2004 4 0 Functionality 4 1 Protocol Initialization There is no DPA III i initialization required beyond power up for proper establishment of standard in vehicle networks For support of non standard communication protocols the INIT protocol command is provided This command lets you specify such things as protocol baud rates and timing parameters Parameters that are marked Reserved are set aside for future use A special note about Mailbox 0 This mailbox for both receive and transmit is reserved for extended messages i e where the byte count is greater than the standard CAN message size There is a mailbox reserved for RX and TX i e RXmbox0 and TXmbox0 Mailbox 0 can a
8. 1850 message with Format 60h Target Flh Source 81 with 4 bytes of data returned to host Reminder J1850 data values are joined in sequence and used in this command as one parameter Command RX 2 6CF181 4 lt CR gt Response DX 2 6CF181 11 22 33 44 lt CR gt Send J1939 message with 29 Bit CAN Identifier 10780 hex 8 bytes returned to host Command RX 3 10780 8 lt CR gt Response DX 3 10780 11 22 33 44 55 66 77 88 lt CR gt Send CAN message with 11 Bit Identifier 123 hex 5 bytes returned to host Command RX 4 123 5 lt CR gt Response DX 4 123 11 22 33 44 55 lt CR gt Dearborn Group ES Technology DPA III i USER S MANUAL 2004 4 4 Broadcast The DPA III i can be programmed to broadcast a specific message at a given time interval in milliseconds to off load the Host from those heavy timing requirements These are referred to as Broadcast messages and the DPA II i can support up to 12 messages at a time for each protocol Each mailbox can be loaded with new information at any time The DPA III i uses the following commands to support Broadcast messages e LT Load Transmit Broadcast mailbox e DT Delete Transmit Broadcast mailbox 4 4 1 Load Broadcast message command format This command is used to load the transmit mailbox Command Syntax LT Protocol Mailbox Number UD Data Count Data Broadcast Count Interval lt CR gt Command Parameters LT Load Transmit Ma
9. 32 Load Buffer Command Format 28 4 6 4 Load Buffer Command Eyampoies 28 4 7 Timer CommandsS EEN 29 4 7 1 Ger Timer kale COMIN Ad a REENEN EE 29 4 7 2 Pause Timer Commande 30 4 7 3 Resume Timer COMIN AN aaa cucu sunesnucnneccunsnnnneennvenvenusaesnussecsnuessusnsssnneseusssessasanuensessnsssns 30 47a SCE TINICK COMING EE 30 4 8 General CommandS eindsecseieddendiivedi deed ces ccc ws cane ee EAR ladaatudeceteadiectunrrenteicvas 31 48T GOE VEFSION COMMA EE 37 4 8 2 gt RCSCE COMMMANG i ascites cede ks i eta EO ee eet Herd wD ee ee 37 A CAN BIT TIMING REGISTERS NNN NENNEN NNN 32 INDD Sener ne Senay Aree nee eee MAHER OREN Se REI See as mn ae a Nene Re Reet RNa 34 Table of Figures Figure 1 DPA IIl i to Host Wiring EE EE EE EE EE 4 Figure 2 DPA III i Bus Protocol Pinouts EE 4 Figure 3 DPA III i Bus Protocol Pinouts EE 8 Dearborn Group ay Technology DPA III i USER S MANUAL 2004 CHAPTER 1 0 Overview The DPA III i is designed to support Programmable Logic Controllers PLCs Personal Computers PCs and Personal Digital Assistants PDAs where custom drivers are not always an option Throughout this document these devices will be generically referred to as the Host The DPA III i is a custom version of our popular DPA and is designed to understand ASCII commands It uses a small set of ASCII commands to give the Host full access to all the protocols supported by the DPA III without forcing the Host to take
10. Dearborn Group Technology DEARBORN PROTOCOL ADAPTER DPA III i USER S MANUAL Version 2 06 Rev4 2002 Dearborn Group Inc 27007 Hills Tech Court Farmington Hills MI 48331 Phone 248 488 2080 Fax 248 488 2082 http www dgtech com DPA III i USER S MANUAL 2004 This document is copyrighted by the Dearborn Group Inc Permission is granted to copy any or all portions of this manual provided that such copies are for use with the product provided by the Dearborn Group and that the name Dearborn Group Inc remain on all copies as on the original IMPORTANT NOTICE The DPA III i is intended for use as an evaluation tool only Damage to the tool if caused by misuse is not covered under the seller s product warranty When using this manual please remember the following e This manual may be changed in whole or in part without notice Current updates to this manual may be found on Dearborn Group s web site at http www dgtech com e Dearborn Group Inc does not assume responsibility for any damage resulting from any accident or for any other reason while the DPA III 1 is in use e Examples of circuitry described herein are for illustration purposes only and do not necessarily represent the latest revisions of hardware or software Dearborn Group Inc assumes no responsibility for any intellectual property claims that may result from use of this material e No license is granted by impli
11. SER S MANUAL 2004 Load J1939 mailbox 11 to monitor for 29 Bit CAN Identifier 00F00400 hex messages without Timestamp with Source Address of 0 and send ID and data Command LM 3 B 00F00400 00FFFFFF 0 06 8 lt CR gt Response MX 3 B 18F00400 11 22 33 44 55 66 77 88 lt CR gt Load 11 Bit CAN mailbox 9 to monitor for ID 256 hex messages and send only timestamp Command LM 4 9 256 7FF 0 08 8 lt CR gt Response MX 4 9 10985567 lt CR gt 4 5 4 Read Monitor Command Format This command lets the Host to get the latest data from a previous Load Monitor mailbox Command Syntax RM Protocol Mailbox Number Response lt CR gt Command Parameters RM Read Monitor Mailbox command Protocol 1 J1708 2 J1850 3 J1939 29 Bit ID 4 CAN 11 Bit ID Mailbox Number Mailbox to be read 01h OCh Response Hex 00h Don t respond just say I got something from the mailbox 01h Send Data Count 02h Send Data 04h Send ID 08h Send Time Stamp Note User may enable any combination Dearborn Group oo Technology DPA III i USER S MANUAL 2004 4 5 5 Read Monitor Protocol Examples Read J1708 mailbox 1 get the ID 04h and data 02h Note in this example the two items are ANDed and used in the command as 06h Data count is not included in the response Command RM 1 1 06 lt CR gt Response MX 1 1 80 34 11 22 33 lt CR gt Read J1850 mailbox 4 and retrieve timestamp 08h ID 04h dat
12. a count 01h and data 02h Note in this example the four items are ANDed and used in the command as OFh Command RM 2 4 0F lt CR gt Response MX 2 4 7654 486B1F 5 11 22 33 44 55 lt CR gt Read J1939 mailbox 11 retrieve ID and data Data count is not included in the response Command RM 3 B 06 lt CR gt Response MX 3 B 18F00400 11 22 33 44 55 66 77 88 lt CR gt Read 11 Bit CAN mailbox 9 retrieve timestamp Command RM 4 9 08 lt CR gt Response MX 4 9 10985567 lt CR gt Dearborn Group 29 Technology DPA III i USER S MANUAL 2004 4 5 6 Delete Monitor Command Format This command is used to delete a previously created monitor mailbox Command Syntax DM Protocol Mailbox Number lt CR gt Command Parameters DM Delete Monitor Mailbox command Protocol 1 J1708 2 J1850 3 J1939 29 Bit ID 4 CAN 11 Bit ID Mailbox Number Mailbox to be deleted 01h OCh 4 5 7 Delete Monitor Examples Delete J1708 mailbox 1 DM 1 1 lt CR gt Delete J1850 mailbox 4 DM 2 4 lt CR gt Delete J1939 mailbox 11 DM 3 B lt CR gt Delete 11 bit CAN mailbox 9 DM 4 9 lt CR gt Dearborn Group 26 Technology DPA III i USER S MANUAL 2004 4 6 Buffer Commands The I O Buffer or Host scratch pad is an area of memory reserved in the DPA III It is used for temporary storage of data for transmit or receive mailboxes It also adds flexibility to the transmitting and r
13. cation or otherwise for any patents or any other rights of Dearborn Group Inc or of any third party DPA III i is a trademark of Dearborn Group Inc CAN is a trademark of Bosch Inc Other products are trademarks of their respective manufacturers Manual revision history June 2 2004 minor changes for consistency May 14 2003 minor changes and clarification Dearborn Group ii Technology DPA III i USER S MANUAL 2004 Table of Contents 1 0 OVER VIEW eeneg eege 1 1 1 DOCUMENTATION organization vice cies EE EE EES AE SE 1 1 2 Technical support ET 2 1 3 Product Registrattttzsetergge eege ege geed ENEE teen waueesy 2 Sat HOST INTEREAGE ee a a 3 s t Host COMMUNICATION i edu EN EEN ege ENEE 3 QT QUICK SAME social Bois APEE EE a eege dE 3 2 2 HOSE COMMECHOMNG ee deene atten eeneg ed eeh de 3 2 2 1 Host Communication COMIMNANA assssececnececsnecncncsnnenssnnensnsssesssnenensenssnenssnensssanessanssnsensses 5 2 2 2 Host Communication Initialization Command Format 6 2 2 3 Host Communication Command Examples ss sssssssssssssnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnns 6 2 2 4 Save Serial Configuration Commande 7 2 2 5 Save Serial Configuration Command Eyampoies 7 3 0 PROTOCOL INTERFACE Eege eee ek Seen es 8 3 1 Supported Protocols cis cose acts Aneehee eel veiesteeniact ccichweetecs vaasbacebesscetecacsetes 8 3 2 Protocol Onnens Gute ebe ek eege eege eeh kee eEA Eed bbws 8 4 0 EINHORN e 9 4 1 Protocol Jotal
14. d 5 bytes of data stating at address 100 of the scratch pad Command LB 5 100 1 2 3 4 5 lt CR gt Dearborn Group 28 Technology DPA III i USER S MANUAL 2004 4 7 Timer Commands The timer is a free running millisecond clock that runs 49 5 days before rolling over to zero t is used to determine when a message is to be sent by transmit in order to timestamp incoming messages with their respective times received The timer may be set to control the timing of outgoing broadcast messages and to set a base time for the timestamping of incoming messages The PC commands used to control the timer allow the user to reset the timer request synchronization with the DPA III 1 s internal timer pause and resume timer function The DPA III i supports the following timer commands e GT Get the current timer value e DT Response from the GT command e PT Pause the timer e RT Resume the timer e ST Set the timer value 4 7 1 Get Timer value command This command is used to get the current timer value Command Syntax GT lt CR gt Command Parameters GT Requests the current DPA III i timer value Response DT Value lt CR gt Example response DT 12345 lt CR gt Dearborn Group a Technology DPA III i USER S MANUAL 2004 4 7 2 Pause Timer command This command is used to pause the timer and postpone transmission Command Syntax PT lt CR gt Command Parameters
15. e parameter LT 2 4 686AF1 4 11 22 33 44 125 250 lt CR gt Load J1939 Mailbox 8 to send 29 Bit CAN Identifier 10780 hex with 8 bytes of data with Boradcast Count of 400 dec every 100ms dec LT 3 8 10780 8 11 22 33 44 55 66 77 88 400 100 lt CR gt Load 11 Bit CAN Mailbox 11 to send ID 123 hex with 5 bytes of data with Broadcast Count of forever every 500ms LT 4 B 123 5 11 22 33 44 55 1 500 lt CR gt Dearborn Group 12 Technology DPA III i USER S MANUAL 2004 4 4 3 Delete Broadcast Command Format Delete Broadcast message is used to delete or stop the broadcast of the specified message If the DPA III 1 has sent all the messages defined in Count it will auto delete Command Syntax DT Protocol Mailbox Number lt CR gt Command Parameters DT Delete Transmit Mailbox command Protocol 1 J1708 2 J1850 3 J1939 29 Bit ID 4 CAN 11 Bit ID Mailbox Number Mailbox to be loaded 01h OCh 4 4 4 Delete Broadcast Command Examples Delete J1708 Mailbox 1 DT 1 1 lt CR gt Delete J1850 Mailbox 4 DT 2 4 lt CR gt Delete J1939 Mailbox 8 DT 3 8 lt CR gt Delete 11 Bit CAN Mailbox 11 DT 4 B lt CR gt Dearborn Group ae Technology DPA III i USER S MANUAL 2004 45 Monitor The DPA III i supports the monitoring of messages that appear on the different protocols It will support up to 12 Monitor mailboxes per protocol There are several differences be
16. eceiving of messages regardless of network type CAN J1708 or J1850 The following commands let you retrieve and load messages into the I O Buffer e RB Read data from the scratch pad command e DB Data from the scratch pad in response to the RB command e LB Loads data into the scratch pad 4 6 1 Read Buffer Command Format This command is used to read the I O data buffer of the DPA III 1 Command Syntax RB Byte count Starting Address lt CR gt Command Parameters RB Reads data from the DPA ITI i s I O buffer internal scratch memory Byte Count Number of data bytes to be read Starting Address Address in the buffer where reading should begin Response DB datal datan lt CR gt 4 6 2 Read Buffer Examples Read 10 dec bytes of data starting at address 200 dec of the scratch pad Command RB 10 200 lt CR gt Response DB 1 2 3 4 5 6 7 8 9 lO lt CR gt Dearborn Group ae Technology DPA III i USER S MANUAL 2004 4 6 3 Load Buffer Command Format This command is used to load data into the DPA III i internal buffer Command Syntax LB Byte Count Starting Address Data lt CR gt Command Parameters LB Loads data into the I O data buffer of the DPA III 1 Byte Count Number of data bytes to transfer Starting Address Buffer address to which writing should start Data Data to be loaded into the buffer 4 6 4 Load Buffer Command Examples Loa
17. follow all protocol rules as defined by SAE when it transmits a message 4 2 1 Transmit Command Format This command is used to transmit a message Command Syntax TX Protocol ID Data lt CR gt Command Parameters TX Transmit command Protocol 1 J1708 2 J1850 3 J1939 29 Bit ID 4 CAN 11 Bit ID ID Protocol specific identifier to be broadcast J1708 Priority MID Message ID PID Parameter ID Note commas mean the above J1708 items are used in this command as three separate data parameters J1850 Format Target Source Note plus signs mean the above J1850 data values are joined in sequence and used in this command as one parameter J1939 29 bit CAN Identifier CAN 11 Bit CAN Identifier Data Data to be sent in message Dearborn Group 13 Technology DPA III i USER S MANUAL 2004 4 2 2 Transmit Examples Send J1708 message with Priority 6 dec MID 128 dec PID 52 dec with 1 byte of data Reminder commands require all parameters and data to be in hexadecimal However byte count and time stamp data is in decimal TX 1 6 80 34 1 lt CR gt Send J1850 message with ID of Format 68 hex Target 6A hex Source 1F hex with 4 bytes of data Reminder J1850 data values are joined in sequence and used in this command as one parameter TX 2 686A 1F 11 22 33 44 lt CR gt Send J1939 message with 29 Bit CAN Identifier 10780 hex
18. h Single wire CAN Note User may enable any combination Param3 Mailbox used for RX TX commands Input the mailbox number in the lower nibble Default Mailbox 0 b xxxx yyyy x don t care y mbox hex Param4 Reserved Note For J1939 and 11 Bit CAN Param0 and Param are directly written into the BTIMEO0 and BTIME registers of the Intel 82527 CAN controller Refer to the user s manual of this device to calculate the baud rate Dearborn Group Technology DPA III i USER S MANUAL 4 1 2 Protocols Initialization Examples Set J1708 to 9600 BAUD default values INIT 1 0 0 0 0 0 lt CR gt Set J1708 to 9600 BAUD using mailbox 12 for the RX TX commands INIT 1 0 0 0 0C 0 lt CR gt Set J1850 to 10400 BAUD default values INIT 2 0 0 0 0 0 lt CR gt Set J1939 protocol to 250K baud 29 Bit preferred default values INIT 3 41 58 0 0 0 lt CR gt Set CAN 11 Bit protocol to 250K baud 11 Bit preferred INIT 4 41 58 1 0 0 lt CR gt 2004 Set CAN 11 Bit protocol to 250K baud with11 Bit preferred using Single wire CAN Note in this example Param2 contains the ANDed value 11 of the 11 Bit preferred code 01h and the Single wire CAN code 10h INIT 4 41 58 11 0 0 lt CR gt Dearborn Group Technology 12 DPA III i USER S MANUAL 2004 4 2 Transmit The Transmit message command is used to transmit a specific message using any of the supported protocols The DPA III i will
19. ilbox command Protocol 1 J1708 2 J1850 3 J1939 29 Bit ID 4 CAN 11 Bit ID Mailbox Number Mailbox to be loaded 01h OCh ID Protocol specific identifier to be broadcast J1708 Priority MID Message ID PID Parameter ID Note commas mean the above J1708 items are used in this command as three separate data parameters J1850 Format Target Source Note plus signs mean the above J1850 data values are joined in sequence and used in this command as one parameter J1939 29 bit CAN Identifier CAN 11 Bit CAN Identifier Data Count Number of Data bytes to be broadcast Data Data to be sent in message Dearborn Group 13 Technology DPA III i USER S MANUAL 2004 Broadcast Count Number of times the message is to be sent 1 32000 1 forever Interval Number of milliseconds between transmitting of message 4 4 2 Broadcast Command Examples Load J1708 Mailbox 1 to send message Priority 6 dec MID 128 dec PID 52 dec with 1 byte of data with Broadcast Count of 100 dec every 500m dec Reminder commands require all parameters and data to be in hexadecimal LT 1 1 6 80 34 1 11 100 500 lt CR gt Load J1850 Mailbox 4 to send Identifier Format 68 hex Target 6A hex Source F1 hex with 4 bytes of data with Broadcast Count of 125 dec every 250ms dec Reminder J1850 data values are joined in sequence and used in this command as on
20. in this command as one parameter J1939 29 bit CAN Identifier CAN 11 Bit CAN Identifier Byte Count Number of data bytes to be returned to the Host Dearborn Group 15 Technology DPA III i USER S MANUAL 2004 4 3 2 Received message response format When the DPA III i has received the requested message it sends data to the Host as follows Command Syntax DX Protocol ID Data lt CR gt Command Parameters DX Receive Response Protocol 1 J1708 2 J1850 3 J1939 29 Bit ID 4 CAN 11 Bit ID ID Protocol specific identifier to be broadcast J1708 MID Message ID PID Parameter ID Note commas mean the above J1708 items are used in this command as two separate data parameters J1850 Format Target Source Note plus signs mean the above J1850 data values are joined in sequence and used in this command as one parameter J1939 29 bit CAN Identifier CAN 11 Bit CAN Identifier Data Data received from the link for the specified identifier Dearborn Group 16 Technology DPA III i USER S MANUAL 2004 4 3 3 Receive Message Command And Response Examples Send J1708 message with MID 80 dec PID 34 dec one byte returned to host Reminder commands require all parameters and data to be in hexadecimal However byte count and time stamp data is in decimal Command RX 1 80 34 1 lt CR gt Response DX 1 80 34 11 lt CR gt Send J
21. lso be used by the LM command see section 4 5 and the LT command see section 4 4 However an RX or TX command will overwrite the mailbox See the INIT command below for information on changing the mailbox that your application uses for the RX and TX commands Note Extended messages can only be used for one protocol at a time 4 1 1 Protocol Initialization Command Format This command initializes the protocol used by the DPA III 1 Command Syntax INIT Protocol Param 0 Param 1 Param 2 Param 3 Param 4 lt CR gt Command Parameters INIT Initialization command Also see the INIT command in section 2 2 2 Protocol Protocol Specific Parameters 1 J1708 Param0 0 9600 BAUD Dearborn Group Technology DPA III i USER S MANUAL 2004 1 19200 BAUD 2 10400 BAUD 3 38400 BAUD 4 8192 BAUD Param1 Reserved Param Reserved Param3 Mailbox used for RX TX commands Input the mailbox number in the lower nibble Default Mailbox 0 b xxxx yyyy x don t care y mbox hex Param4 Config Set to b xxxx xxx to enable unpacking of PID s per SAE J1587 2 J1850 Param0 0 10400 BAUD Param1 Reserved Param2 Reserved Param3 Mailbox Input the mailbox number in the lower nibble Default Mailbox 0 b xxxx yyyy x don t care y mbox hex Param4 Reserved 3 J1939 CAN 29 Bit ID Param0 amp Param are bit timing registers 0 amp 1 respectively as used on an 82527
22. nd resetting the timer Dearborn Group 31 Technology DPA III i USER S MANUAL 2004 APPENDIX A A CAN BIT TIMING REGISTERS The CAN Bit Timing Registers BTRs are the registers that determine bus speed They also set up sampling and re synchronization of the CAN controller Different networks use different parameters for these values In fact there are several combinations that can all generate the same bus speed The DPA uses an 80C196CA micro controller with an Intel 82527 CAN controller on board The crystal is 16 MHz The following is a brief overview of the bit timing registers Please reference the documents listed in section 1 3 for more information The CAN controller has two registers BTRO and BTR1 used to determine bus speed Common values for networks are as follows DeviceNet 125 kbps 0x03 Ox1C 250 Kbps 0x01 0x1C 500 Kbps 0x00 Ox1C Register BTRO 7 6 5 4 3 2 1 0 SJW1 0 Synchronization Jump Width Defines the maximum number of time quanta by which re synchronization can modify tseg1 and tseg2 BRP0 5 Baud rate Prescaler Defines the length of one time quantum tq Register BTR1 Dearborn Group 22 Technology DPA III i USER S MANUAL 2004 TSEG2 2 TSEG2 1 TSEG2 0 TSEG1 3 TSEG1 2 TSEG1 1 TSEG1 0 Sampling Mode Specifies the number of samples when determining a valid bit value 1 3 samples using majority logic 0 1 sample Time Segment 2 Determines the leng
23. o be kept J1708 MID Message ID mask PID Parameter ID mask Note commas mean the above J1708 items are used in this command as two separate data parameters J1850 Format mask Target mask Source mask Note plus signs mean the above J1850 data values are joined in sequence and used in this command as one parameter J1939 29 bit CAN Identifier mask CAN 11 Bit CAN Identifier mask Note Bit wise masking where 1 must match 0 don t care Filter Type 0 If filter matches forward message to Host 1 If filter matches block message from Host Auto Response 00h Don t Auto 01h Send Data Count 02h Send Data 04h Send ID 08h Send Time Stamp Note User may enable any combination Auto send will match Read Monitor Response exactly Data Count Number of Data bytes to be forwarded to Host can be this amount or less 4 5 2 Load Monitor Response Format This command is used to monitor the received mailbox data Command Syntax MX Protocol Mailbox Number Timestamp ID Data Count Data lt CR gt Command Parameters MX Monitor Received Mailbox Data response Protocol 1 J1708 2 J1850 3 J1939 29 Bit ID 4 CAN 11 Bit ID Dearborn Group a Technology DPA III i USER S MANUAL 2004 Mailbox Number Mailbox to be loaded 01h OCh Timestamp Optional If requested this is the Relative time the message was received in milliseconds
24. oad buffer command See command load monitor mailbox command See command load transmit mailbox command See command Mailbox 0 9 monitor received mailbox data response 22 PLC wiring See wiring protocol connections 8 protocols 8 read buffer command See command read monitor mailbox command See command receive command See command Receive Response 16 save serial configuration command See command supported protocols 8 technical support 2 timer commands See command transmit command See command web site 2 wiring DPA 37 1 4 PLC 4 34
25. on the real time responsibility of the protocols themselves 1 1 Documentation organization This manual contains several chapters an appendix and an index Each chapter covers the following information Chapter 1 Overview provides an overview of the manual and summarizes the contents of the remaining chapters and appendices The remainder of this chapter provides reference to related documentation and technical support The chapters that follow address these subjects Chapter 2 Host Interface describes the steps necessary to use the DPA HI 1 Chapter 3 Protocol Interface describes the protocols available and how to connect to them Chapter 4 Functionality describes the commands used to communicate with the DPA MI i Dearborn Group Technology DPA III i USER S MANUAL 2004 1 2 Technical support In the U S technical support representatives are available to answer your questions between 9 a m and 5 p m EST You may also fax or e mail your questions to us Please include your voice telephone number for prompt assistance Non U S users may want to contact their local representatives Phone 248 488 2080 Fax 248 488 2082 E mail techsupp dgtech com Web site http www dgtech com 1 3 Product Registration Before getting started please take a moment to log on to our web site to register this product online As a registered user you will receive technical support and important
26. roup Technology DPA III i USER S MANUAL 2004 DPA III i and PLC Wiring Illustrations HOST DPA Figure 1 DPA III i to Host Wiring OPTIONAL CONNECTING PIN 3 TO PIN 4 WILL INSERT A 120 OHM RESISTOR ACROSS CAN HI AND CAN LO FOR TERMINATION OF CAN LINK 1 9 2 SW CAN lt ig 4 CAN LO lt 1 J1850 lt e CAN HI lt x GND lt 44 J1708 lt CAN SHIELD lt 3 J1708 lt 3 VEH PWR lt Figure 2 DPA III i Bus Protocol Pinouts Dearborn Group 4 Technology DPA III i USER S MANUAL 2004 2 2 1 Host Communication Command The DPA III i will default to a 9600 BAUD communication link to the Host The DPA III i can also be reconfigured to communicate at different baud rates and handshaking modes see section 2 2 2 The DPA III i supports these three handshaking modes e None The DPA III i will ignore the RTS signal and raise CTS e Hardware The DPA III i will support RTS CTS handshaking mode e Software The DPA III i will support the Xon Xoff mode To stop the flow of data send a S 13h To start the flow of data send a Q 11h These modes are set according to the Param1 and Param2 parameters described in the Initialize data link command see section 2 2 2 Setting bit 0 in param3 of the initialize data link command will enable ACK s Ifa command has been received correctly the DPA IMI i will send back a OxCO ACK If the command received is not valid the DPA II Jr
27. th of time that follows the sample point within a bit time Valid values 1 7 Time Segment 1 Defines the length of time that precedes the sample point within a bit time Valid values 2 15 1 bit time K Tseg1 lt _ 1 time quantum tq sample point transmit point The bus speed can be calculated as follows Bus Frequency Fosc 2 x BRP 1 x 3 TSEG1 TSEG2 Fosc Input Clock Frequency If BTRO 01 SJW 0 BRP 1 BTR1 1C SPL 0 TSEG2 1 TSEG1 12 Bus Frequency 16MHz 250 000 2x 1 1 x 3 1 12 Dearborn Group 33 Technology INDEX broadcast messages 18 CAN 8 command delete monitor mailbox DM 26 delete transmit mailbox DT 20 get DPA 3 1 version VR 31 get the current value GT 29 initialization INIT 6 9 load buffer LB 28 load monitor mailbox LM 21 load transmit mailbox LT 18 pause the timer PT 30 read buffer RB 27 read monitor mailbox RM 24 receive RX 15 resume the timer RT 30 save serial configuration SSC 7 set the timer ST 30 transmit TX 13 communication with Host 3 delete monitor mailbox command See command delete transmit mailbox command See command DPA 3 initialization 9 DPA 3 1 wiring See wiring e mail 2 Host communication 3 initialization command See command Dearborn Group Technology DPA III i USER S MANUAL 2004 initialization of DPA 3 1 9 J1708 8 9 J1850 8 10 J1939 8 10 l
28. tween Monitor and Receive Using Monitor the DPA III D will keep the latest data associated with the requested message and send the data to the Host depending on the Auto Response configuration The DPA III i can do bit wise masking of the identifiers and it can also perform pass or block filtering of the messages and the Host can delete the mailbox There are three commands used to support the Monitor Protocol function e LM Load Monitor Mailbox e RM Read Monitor Mailbox e DM Delete Monitor Mailbox 4 5 1 Load Monitor Command Format This command is used to load the monitor mailbox with specific data Command Syntax LM Protocol Mailbox Number ID ID Mask Filter Type Auto Response Data Count lt CR gt Command Parameters LM Load Monitor Mailbox command Protocol 1 J1708 2 J1850 3 J1939 29 Bit ID 4 CAN 11 Bit ID Mailbox Number Mailbox to be loaded 01h OCh ID Protocol specific identifier to be kept J1708 MID Message ID PID Parameter ID Note commas mean the above J1708 items are used in this command as two separate data parameters J1850 Format Target Source Note plus signs mean the above J1850 data values are joined in sequence and used in this command as one parameter J1939 29 bit CAN Identifier Dearborn Group 2l Technology DPA III i USER S MANUAL 2004 CAN 11 Bit CAN Identifier ID Mask Protocol specific identifier mask t
29. will send back a 0xDO NAK The exception to this is if the command already generates a response it will not send back an ACK Here are some simple examples of various commands that are supported by the DPA III D Use of these commands as well as others are described elsewhere in this User s Manual Examples PT lt CR gt Pause timer command OxC0 lt CR gt ACK from DPA III i RT lt CR gt Resume timer command OxD0 lt CR gt NAK from DPA III i VR lt CR gt Get version command Dearborn Industrial Version 2 07 J1708 J1850 J1939 SW CAN BUF4096 lt CR gt Dearborn Group Technology DPA III i USER S MANUAL 2004 2 2 2 Host Communication Initialization Command Format This command is used to initialize communication between the DPA III i and the Host Command Syntax INIT Protocol Param0 Param1 Param2 Param3 Param4 lt CR gt Command Parameters INIT Initialization command Also see the INIT command in section 4 1 1 Protocol 0 Serial Port Param0 Baud 0 1200 1 2400 2 4800 3 9600 4 14400 5 19200 6 28800 7 38400 8 57600 9 115200 Parami Param2 0 No handshaking Both values 0 Parami Param2 0 RTS CTS handshaking Both values 1 Param1 Q and Param2 S Xon Xoff handshaking Param3 Ack Nak configuration Set to b xxxx xxx1 to enable Param4 Reserved 2 2 3 Host Communication Command Examples Set Host Communication Baud rate
30. zaten egesgeggediesu tege de ANERER NEE 9 4 1 1 Protocol Initialization Command Format 9 4 1 2 Protocols Initialization Examples siisii aannaaien iaaea Aaaa iaaii ei raaa raaa 12 Mos ET E EEN 13 4 2 7 Transmit e E RTE 13 4 22 Transmit Examples EE 14 AS RECEIVE EE 15 4 3 1 Receive message command format 15 4 3 2 Received message response format 16 4 3 3 Receive Message Command And Response EXAiMp les sisssccccccssnnsenessscceennnnnnnsnsscesenaes 17 a a e ET EE 18 4 4 1 Load Broadcast message command format 18 4 4 2 Broadcast Command EXAIMplesy ss cssccccccccscccccccccecensnnssnssnnnsnasanansnasenansnaasanasnnasnaasananansnaas 19 4 4 3 Delete Broadcast Command Format 20 4 4 4 Delete Broadcast Command Examples s ssssssssssssssessnnnnnnnnnnnnnnnnnennnnrnnernnerenenrernrrenrreerrens 20 RE ee EE 21 4 5 1 Load Monitor Command Format 21 4 5 2 Load Monitor Response Format 22 4 5 3 Load Monitor Protocol EXAarnp0les 1 ccccccccccccccscccsccsnnssnnnennsnnnnsnnnenansnanssasnasenansnansnansnansnass 23 4 5 4 Read Monitor Command Format 24 4 5 5 Read Monitor Protocol ECxvamoies 25 4 5 6 Delete Monitor Command Format 26 4 5 7 Delete Monitor Examples ss ccccsssczsccsciccecasencnvdesetesstensunrnveioatpagernsenvessitpinetestnrsentbensiersvire 26 Dearborn Group Technology DPA III i USER S MANUAL 2004 4 6 uerteelen eh 27 4 6 1 Read Buffer Command Format 27 4 6 2 Read Buffer Ernest dees eet ioe A eee 27 4 6
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