Electronic system with a plurality of electronic units

• US 20040254766A1
• Filed: 06/09/2004
• Published: 12/16/2004
• Est. Priority Date: 06/10/2003
• Status: Active Grant

• Current Assignee: DENSO Corporation
• Original Assignee: DENSO Corporation
• Inventors: Ito, Akira
• Granted Patent: US 7,865,672 B2
• Time in Patent Office: Days
• US Class Current: 702/188
• CPC Class Codes: G05B 19/0421 Multiprocessor system
• CPC Class Codes: G05B 2219/2208 Each processor controls a different function of the machine
• CPC Class Codes: G05B 2219/25157 Checksum CRC
• CPC Class Codes: G05B 2219/2637 Vehicle, car, auto, wheelchair
• CPC Class Codes: G06F 13/126 and has means for transferring I/O instructions and statuses between control unit and main processor

Abstract

An electronic system has a first electronic unit for carrying out a first predetermined operation and a second electronic unit for carrying out a second predetermined operation. The first and second electronic units are electrically communicable with each other. In the system, the first electronic unit stores control data. The second control unit requires the control data for carrying out the second predetermined operation. The second electronic unit sends to the first electronic unit a request to send the control data when the second electronic unit is reset.

Claims

1. An electronic system having a first electronic unit for carrying out a first predetermined operation and a second electronic unit for carrying out a second predetermined operation, said first and second electronic units being electrically communicable with each other, said system comprising:

control data storing means provided in the first electronic unit for storing therein control data, said second control unit requiring the control data for carrying out the second predetermined operation; and

request sending means provided in the second electronic unit for sending to the first electronic unit a request to send the control data when the second electronic unit is reset.

2. An electronic system according to claim 1, wherein said second electronic unit is electrically connected to a target device and controls an operation of the target device as the second predetermined operation, and said control data includes at least one of calibration data representing one or more operation characteristics of the target device, and learned data representing one or more aging characteristics of the target device, further comprising:

request receiving means provided in the first electronic unit for receiving the request; and

control data sending means provided in the first electronic unit for sending to the second electronic unit the at least one of calibration data and the learned data.

3. An electronic system according to claim 2, wherein said control data is the calibration data.

4. An electronic system according to claim 2, wherein said calibration data includes a plurality of calibration parameters that represent the operation characteristics of the target device, respectively, said control data sending means is configured to extract at least one parameter from the plurality of calibration parameters to send the extracted at least one parameter to the second electronic unit.

5. An electronic system according to claim 2, wherein said control data sending means is configured to send packet data that is composed of the calibration data and identification data that allows the second electronic unit to identify the calibration data.

6. An electronic system according to claim 5, wherein said identification data includes a plurality of identification codes, further comprising packet data receiving means provided in the second electronic unit for receiving the packet data;

and determining means provided in the second electric unit for determining whether the received packet includes all of the plurality of identification codes, wherein said determining means determines to receive the calibration data only if the received packet includes all of the plurality of identification codes.

7. An electronic system according to claim 6, wherein said plurality of identification codes include a first code indicating the calibration data and a second code that mirrors the first code, and wherein said determining means determines to receive the calibration data only if the first code in the received packet coincides with the second code.

8. An electronic system according to claim 3, further comprising:

default data storage means provided in the second electronic unit for storing therein default data for controlling the operation of the target device;

control means provided in the second electronic unit for controlling the operation of the target device according to the default data if no calibration data is transmitted to the second electronic unit, and said control means controlling the operation of the target device according to the calibration data if the calibration data is transmitted to the second electronic unit.

9. An electronic system according to claim 2, wherein said control data is the learned data.

10. An electronic system according to claim 9, wherein said control data sending means is configured to send packet data that is composed of the learned data and an identification data that allows the second electronic unit to identify the calibration data.

11. An electronic system according to claim 10, wherein said identification data includes a plurality of identification codes, further comprising packet data receiving means provided in the second electronic unit for receiving the packet data;

and determining means provided in the second electric unit for determining whether the received packet includes all of the plurality of identification codes, wherein said determining means determines to receive the calibration data only if the received packet includes all of the plurality of identification codes.

12. An electronic system according to claim 11, wherein said plurality of identification codes include a first code indicating the learned data and a second code that mirrors the first code, and wherein said determining means determines to receive the learned data only if the first code in the received packet coincides with the second code.

13. An electronic system according to claim 9, further comprising:

default data storage means provided in the second electronic unit for storing therein default data for controlling the operation of the target device;

control means provided in the second electronic unit for controlling the operation of the target device according to the default data if no learned data is transmitted to the second electronic unit, and said control means controlling the operation of the target device if the learned data is transmitted to the second electronic unit.

14. An electronic system according to claim 2, wherein said control data includes both of the calibration data and the learned data.

15. An electronic system according to claim 2, further comprising:

first reset signal sending means provided in the first electronic unit for sending a reset signal to the second electronic unit during a startup of the electric system, said request sending means receiving the sent reset signal and sending to the first electronic unit the request in response to the reception of the reset signal;

first request receiving means provided in the first electronic unit for receiving the request during the startup of the electric system; and

first control data sending means provided in the first electronic unit for sending to the second electronic unit the at least one of calibration data and the learned data.

16. An electronic system according to claim 15, further comprising:

monitoring means provided in the first electronic unit for monitoring whether an abnormality occurs in the second electronic unit;

second reset signal sending means provided in the first electronic unit and operatively connected to the monitoring mean, said second reset signal sending means sending a reset signal to the second electronic unit if the monitoring means determines that the abnormality occurs in the second electronic unit;

second request receiving means provided in the first electronic unit for receiving the request during the occurrence of the abnormality in the second electronic unit; and

second control data sending means provided in the first electronic unit for sending to the second electronic unit the at least one of calibration data and the learned data.

17. An electronic system having a first electronic unit for carrying out a first predetermined operation and a second electronic unit for carrying out a second predetermined operation, said first and second electronic units being electrically communicable with each other, said system comprising:

control data storing means provided in the first electronic unit for storing therein control data, said second control unit minimally requiring pieces of the control data for carrying out the second predetermined operation; and

request sending means provided in the second electronic unit for sending to the first electronic unit a request to send the pieces of the control data when the second electronic unit is reset.

18. An electric system according to claim 17, wherein said second electronic unit is electrically connected to a target device and controls an operation of the target device as the second predetermined operation, and said control data includes one of calibration data representing one or more operation characteristics of the target device, and learned data representing one or more aging characteristics of the target device, and wherein said control data sending means is configured to extract pieces of the calibration data and the leaned data to send the extracted pieces of the calibration data and the leaned data to the second electronic unit, said pieces of the calibration data and the leaned data being minimally required for controlling the operation of the target device.

19. An electric system according to claim 17, wherein said second electronic unit is electrically connected to a target device and controls an operation of the target device as the second predetermined operation, and said control data includes both of the calibration data representing one or more operation characteristics of the target device, and of the learned data representing one or more aging characteristics of the target device, and wherein said control data sending means is configured to extract one of the calibration data and the leaned data to send the extracted pieces of one of the calibration data and the leaned data to the second electronic unit, said pieces of one of the calibration data and the leaned data being minimally required for controlling the operation of the target device.

20. An electric system according to claim 17, wherein said second electronic unit is electrically connected to a target device and controls an operation of the target device as the second predetermined operation, and said control data includes the calibration data representing one or more operation characteristics of the target device, and learned data representing one or more aging characteristics of the target device, and wherein said control data sending means is configured to extract pieces of one of the calibration data and the leaned data to send the extracted pieces of one of the calibration data and the leaned data to the second electronic unit, said pieces of one of the calibration data and the leaned data being minimally required for controlling the operation of the target device.