J1850 application specific integrated circuit (ASIC) and messaging technique

• US 20040071097A1
• Filed: 10/09/2003
• Published: 04/15/2004
• Est. Priority Date: 11/30/1998
• Status: Active Grant

• Current Assignee: Chrysler Group LLC (Stellantis NV)
• Original Assignee: Chrysler LLC (Stellantis NV)
• Inventors: Halter, Richard A., McCambridge, John M.
• Granted Patent: US 7,283,488 B2
• Time in Patent Office: Days
• US Class Current: 370/257
• CPC Class Codes: H04L 12/403 with centralised control, e.g. polling
• CPC Class Codes: H04L 2012/40273 the transportation system being a vehicle

Abstract

A communication system for controlling remote devices within a vehicle is provided. The communication system includes a master module for generating a command message, and a remote module for executing the command message and generating a response message. A data bus provides bidirectional communication between the master module and the remote module. The communication system also includes a message frame for communicating data between the master module and the remote module, the message frame includes the command message generated by the master module for execution by the remote module, and the message frame includes the response message generated by the remote module for providing feedback to the master module.

Claims

1. A communication system for controlling a remote device within a vehicle comprising:

a master module for generating a command message;

a remote module for executing the command message and generating a response message in response to the command message, the remote module being connected to the remote device;

a data bus for providing bidirectional communication between the master module and the remote module;

a message frame for communicating data between the master module and the remote module, the message frame including the command message generated by the master module for execution by the remote module, and the message frame including the response message generated by the remote module for providing feedback to the master module.

2. The communication system of claim 1 wherein the master module is a controller associated with the vehicle, the controller having a microprocessor and an interface for connecting to the data bus.

3. The communication system of claim 1 wherein the remote module is an ASIC I/O module having a state machine for controlling logic functions executed within the I/O module, the I/O module having an interface for connecting to the data bus.

4. The communication system of claim 1 wherein the data bus is a J1850 data bus.

5. The communication system of claim 1 wherein the command message comprises a two byte message.

6. The communication system of claim 1 wherein the command message includes a sub ID and an executable string of data bits.

7. The communication system of claim 6 wherein the sub ID comprises three data bits included within the two byte message.

8. The communication system of claim 6 wherein the executable string of data bits comprises thirteen data bits

9. The communication system of claim 6 wherein the executable string of data bits includes configuration data for configuring a data port located within the remote module.

10. A multiplexed communication system for controlling remote devices within a vehicle comprising:

a master module having a processor and a communication port;

a remote I/O module having a state machine and a plurality of communication ports;

a J1850 data bus for providing bidirectional communication between the master module and the remote I/O module; and

a message frame for communicating data between the master module and the remote I/O module, the message frame including a control message formatted by the master module for execution by the remote module, and the message frame including a response message formatted by the remote I/O module in response to the command message for providing feedback to the master module;

said control message including a sub ID and an executable string of bits;

said response message including two bytes of feedback data.

11. The multiplexed communication system of claim 10 wherein the sub ID is a binary three bit code for identifying up to eight control messages.

12. The multiplexed communication system of claim 10 wherein the executable string of data bits is thirteen bits of command data which is transmitted by an output port located on the remote I/O module.

13. The multiplexed communication system of claim 12 wherein the output port is a parallel output port connected to a switchable external device.

14. The multiplexed communication system of claim 12 wherein the output port is a serial peripheral interface port.

15. The multiplexed communication system of claim 10 wherein the response message is an in-frame response message.

21. The multiplexed communication system of claim 10 wherein the remote I/O module comprises an ASIC.

22. The multiplexed communication system of claim 10 wherein the remote I/O module comprises an ASIC.

16. A multiplexed communication system for transporting an executable command message between a master control module and a remote device for executing the command message, the communication system comprising:

a remote I/O module having a state machine and an internal data bus for processing the executable command message;

a data bus for providing bidirectional communication between the master control module and the remote I/O module;

a message frame for transporting the executable command message, the message frame containing command data and response data;

the command data including a sub ID portion for identifying the remote device and a command message portion for containing an executable command, the command message portion being transmitted by the remote I/O module to the remote device;

the response data including a response message formatted by the remote I/O module in response to the command message and transmitted by the remote I/O module to the master control module within a predetermined amount of time after receiving the command data.

17. The multiplexed communication system of claim 16 wherein the command message and the response message are communicated within one message frame.

18. The multiplexed communication system of claim 16 wherein the remote I/O module includes an output data bus for communicating the command message to the remote device.

19. The multiplexed communication system of claim 16 wherein the remote I/O module includes a serial peripheral interface for communicating with a remote serial device.

20. The multiplexed communication system of claim 16 wherein the remote I/O module includes an input data bus for receiving signals from the remote device.