Vehicle electronic system and vehicle

• US 8,150,578 B2
• Filed: 12/16/2008
• Issued: 04/03/2012
• Est. Priority Date: 12/17/2007
• Status: Expired due to Fees

• Current Assignee: Hitachi, Ltd.
• Original Assignee: Hitachi, Ltd.
• Inventors: Saen, Makoto, Osada, Kenichi, Oho, Shigeru
• Primary Examiner(s): Fleming, Faye M.
• Application Number:
  US12/335,984
• Publication Number:
  US 20090157252A1
• Time in Patent Office: 1,204 Days
• Field of Search: 701/33, 701/35, 701/36
• US Class Current: 701/33
• CPC Class Codes: G07C 5/0816 Indicating performance data, e.g. occurrence of a malfunction

Abstract

In a vehicle electronic system including a plurality of LSI boards, LSIS which cannot control a user interface such as image or audio directly issue a command for notifying a vehicle occupant of its own information via networks and an information control LSI receives the request to output a message. A mechanism for setting priority of processings regarding LSI status information notification to be lower than that of an apparatus control processing is provided in each of LSIs and networks so that real-time property of the apparatus control processing is maintained. In order to reduce network load regarding the LSI status information notification, a message content itself is stored in a memory in a vehicle information processing unit previously so that only an ID for identifying the message content is transmitted.

Claims

1. A vehicle electronic system comprising:

a plurality of apparatus control unit LSIs which include a monitoring circuit monitoring temperature information and operation speed information of the apparatus control unit LSI, and controls a corresponding movable apparatus part;

a plurality of information processing LSIs which control an image display device or an audio output device;

an apparatus control system network connected to the plurality of apparatus control unit LSIs;

an information processing system network connected to the information processing LSIs; and

a gateway LSI connected between the apparatus control system network and the information processing system network, wherein

the plurality of apparatus control unit LSIs notify the gateway LSI of first abnormality information via the apparatus control system network upon detecting an operation abnormality based on a monitored result obtained by the monitoring circuit,

the gateway LSI notifies the information processing LSI of second abnormality information based on the first abnormality information via the information processing system network upon receiving the first abnormality information from one of the plurality of apparatus control unit LSIs, and

the information processing LSI outputs a message based on the second abnormality information to the image display device or the audio output device upon receiving the second abnormality information.

2. The vehicle electronic system according to claim 1, wherein

the first and second abnormality information include content identification codes,

the information processing LSI includes a table associating the content identification code with corresponding messages and looks up the content identification code and the table to control the image display device or the audio output device messages corresponding to the content identification codes are outputted.

3. The vehicle electronic system according to claim 1, wherein

each of the plurality of apparatus control unit LSIs executes an apparatus control task for controlling the movable apparatus part and an LSI status reflection task for transmitting the first abnormality information to the gateway LSI, and

priority of the apparatus control task is higher than that of the LSI status reflection task, and when a notification of interruption for executing the apparatus control task is issued during execution of the LSI status reflection task, the execution of the LSI status reflection task is interrupted and the apparatus control task is executed.

4. The vehicle electronic system according to claim 1, wherein

the apparatus control system network uses a first arbitration system which assigns a right of use to each of the plurality of apparatus control unit LSIs and the gateway LSI connected to the apparatus control system network at a predetermined time period, and a second arbitration system which assigns a right of use according to priority signals outputted by the plurality of apparatus control unit LSIs and the gateway LSI respectively connected to the apparatus control system network in a switching manner, and

the first abnormality information is transmitted to the apparatus control system network during use of the second arbitration system.

5. The vehicle electronic system according to claim 4, wherein,

when a first apparatus control unit LSI of the plurality of apparatus control unit LSIs issues a first request for transmitting the first abnormality information and a second apparatus control unit LSI of the plurality of apparatus control unit LSIs issues a second request for transmitting predetermined information of another apparatus control unit LSI, the apparatus control system network receives the second request preferentially.

6. The vehicle electronic system according to claim 1 further comprising a plurality of sub LSIs connected to corresponding apparatus control unit LSIs of the plurality of apparatus control unit LSIs, wherein,

when detecting an operation abnormality based on a monitored result obtained by the monitoring circuit, each of the plurality of apparatus control unit LSIs lower an operating frequency or an operating voltage and also replaces a first program corresponding to a task to be processed by a simplified program whose processing amount is small to execute the simplified program, and causes a corresponding sub LSI of the plurality of sub LSIs to perform a processing of a part of the first program.

7. The vehicle electronic system according to claim 1, wherein

each of the plurality of apparatus control unit LSIs acquires operating time history information for each temperature monitored by the monitoring circuit and transmits the first abnormality information when an accumulated execution time at a predetermined temperature abnormality exceeds a predetermined time.

8. The vehicle electronic system according to claim 1 further comprising a plurality of nonvolatile memories corresponding to the plurality of apparatus control unit LSIs, respectively, wherein

each of the plurality of apparatus control unit LSIs stores operating time history information for each temperature monitored by the monitoring circuit in a corresponding nonvolatile memory of the plurality of nonvolatile memories, and

the plurality of nonvolatile memories are accessed by an external output port included in either of the plurality of apparatus control unit LSIs, the information processing LSIs, or the gateway LSI to output the operating time history information.

9. The vehicle electronic system according to claim 1 further comprising:

a plurality of first nonvolatile memories corresponding to the plurality of apparatus control unit LSIs, respectively, and

a second nonvolatile memory corresponding to the gateway LSI, wherein

each of the plurality of apparatus control unit LSIs stores operating time history information for each temperature monitored by the monitoring circuit in a corresponding nonvolatile memory of the plurality of nonvolatile memories,

the first abnormality information includes transmission source information for specifying an apparatus control unit LSI which is a transmission source among the plurality of apparatus control unit LSIs, and

upon receipt of the first abnormality information, the gateway LSI stores the transmission source information in the second nonvolatile memory.

10. The vehicle electronic system according to claim 9, wherein

the operating time history information and the transmission source information are accessed by an external output port provided to the gateway LSI.

11. The vehicle electronic system according to claim 1, wherein,

when a first apparatus control unit LSI of the plurality of apparatus control unit LSIs issues a first request for transmitting the first abnormality information and a second apparatus control unit LSI of the plurality of apparatus control unit LSIs issues a second request for transmitting predetermined information of another apparatus control unit LSI, the apparatus control system network receives the second request preferentially, and,

when the gateway LSI issues a third request for transmitting the second abnormality information and a first information processing LSI of the plurality of information processing LSIs issues a fourth request for transmitting predetermined information to another information processing LSI, the information processing system network receives the third request preferentially.

12. A vehicle comprising:

a plurality of apparatus control unit LSIs which include a monitoring circuit monitoring temperature information and operation speed information of the apparatus control unit LSI, and controls a corresponding movable apparatus part;

a plurality of information processing LSIs which control an image display device or an audio output device;

an apparatus control system network connected to the plurality of apparatus control unit LSIs;

an information processing system network connected to the information processing LSIs; and

a gateway LSI connected between the apparatus control system network and the information processing system network, wherein

the plurality of apparatus control unit LSIs notify the gateway LSI of first abnormality information via the apparatus control system network upon detecting an operation abnormality based on a monitored result obtained by the monitoring circuit,

the gateway LSI notifies the information processing LSI of second abnormality information based on the first abnormality information via the information processing system network upon receiving the first abnormality information from one of the plurality of apparatus control unit LSIs, and

the information processing LSI outputs a message based on the second abnormality information to the image display device or the audio output device upon receiving the second abnormality information.