Multi-processor system and method of processing data thereby

• US 5,579,219 A
• Filed: 03/14/1994
• Issued: 11/26/1996
• Est. Priority Date: 05/25/1990
• Status: Expired due to Fees

• Current Assignee: Hitachi, Ltd.
• Original Assignee: Hitachi, Ltd.
• Inventors: Mori, Kinji, Hirasawa, Shigeki
• Primary Examiner(s): Gordon, Paul P.
• Application Number:
  US08/213,824
• Time in Patent Office: 988 Days
• Field of Search: 364/131, 364/133, 364/431.03, 364/431.12, 364/551.01, 364/426.01, 340/825.06, 340/825.4, 395/725, 123/416, 123/417, 123/480
• US Class Current: 700/4
• CPC Class Codes: G05B 19/0421 Multiprocessor system
• CPC Class Codes: G05B 2219/2219 Processor starts application program only if it receives predetermined data
• CPC Class Codes: G05B 2219/2235 Each slave has library of states during which operation is permitted to start
• CPC Class Codes: G05B 2219/25144 Between microcomputers, processors
• CPC Class Codes: G05B 2219/2637 Vehicle, car, auto, wheelchair

Abstract

A method of data processing in a multi-processor system having multiple processors mutually connected via a transmission path in a moving object or in multiple moving objects, in which each processor only takes in data that the particular processor needs from a transmission path by the processor'"'"'s own determination without an instruction from another processor and processes that data.

Claims

1. A method of processing data in a multi-processor system by transmitting data between multiple processors interconnected via a transmission path, at least one of said multiple processors having an application program which utilizes a plurality of data for execution thereof, said method comprising the steps of:

registering, for later use in said at least one of said multiple processors, information related to said plurality of data utilized for execution of said application program;

receiving in said at least one of said multiple processors from said transmission path, data to be utilized by said application program based upon the registered information;

determining whether at least one datum of said plurality of data utilized for execution of said application program has been received in said receiving step, said at least one datum being a predetermined datum for starting execution of said application program; and

starting execution of said application program when said predetermined datum has been received as indicated by a result of said determining step, regardless of whether or not all of said plurality of data utilized for execution of said application program has been received;

wherein in said starting step when there is at least an unreceived datum of said plurality of data utilized for execution of said application program, execution of said application program is started using an initial value preliminarily specified to correspond to said unreceived datum as said unreceived datum, and received data.

4. A method according to claim 1, wherein in said registering step, code data corresponding to contents of said plurality of data utilized for execution of said application program are registered.

5. A method according to claim 4, further comprising the step of:

sending, by each of said multiple processors, processed result data to said transmission path with at least one of said code data corresponding to the content of said processed result data.

2. A method of processing data in a multi-processor system by transmitting data between multiple processors interconnected via a transmission path, at least one of said multiple processors having an application program which utilizes a plurality of data for execution thereof, said method comprising the steps of:

registering, for later use in said at least one of said multiple processors, information related to said plurality of data utilized for execution of said application program;

receiving, in said at least one of said multiple processors from said transmission path, data to be utilized by said application program based upon the registered information;

determining whether at least one datum of said plurality of data utilized for execution of said application program has been received in said receiving step, said at least one datum being a predetermined datum for starting execution of said application program; and

starting execution of said application program when said predetermined datum has been, received as indicated by a result of said determining step, regardless of whether or not all of said plurality of data utilized for execution of said application program has been received;

wherein in said starting step when there is at least an unreceived datum of said plurality of data utilized for execution of said application program, execution of said application program is started using a previously and most recently updated value of said unreceived datum as said unreceived datum, and received data.

3. A method according to claim 2, wherein in said registering step, code data corresponding to contents of said plurality of data utilized for execution of said application program are registered.

6. A multi-processor system for processing data by transmitting data between multiple processors interconnected via a transmission path, at least one of said multiple processors having an application program which utilizes a plurality of data for execution thereof, said at least one of said multiple processors comprising:

a storage for storing, for later use, information related to said plurality of data utilized for execution of said application program; and

a processing unit for receiving, from said transmission path, data to be utilized by said application program based upon said information stored in said storage, determining whether at least one datum of said plurality of data utilized for execution of said application program has been received, said at least one datum being a predetermined datum for starting execution of said application program, and starting execution of said application program when said predetermined datum has been received regardless of whether or not all of said plurality of data utilized for execution of said application program has been received;

wherein said processing unit, when there is at least an unreceived datum of said plurality of data utilized for execution of said application program, starts execution of said application program using an initial value preliminarily specified to correspond to said unreceived datum as said unreceived datum, and received data.

10. A multi-processing system according to claim 6, wherein said storage stores code data corresponding to contents of said plurality of data utilized for execution of said application program.

11. A multi-processing system according to claim 10, wherein each of said multiple processors sends processed result data to said transmission path with at least one of said code data corresponding to the content of said processed result data.

7. A multi-processing system for processing data by transmitting data between multiple processors interconnected via a transmission path, at least one of said multiple processors having an application program which utilizes a plurality of data four execution thereof, said at least one of said multiple processors comprising:

a storage for storing, for later use, information related to said plurality of data utilized for execution of said application program; and

a processing unit for receiving, from said transmission path, data to be utilized by said application program based upon said information stored in said storage, determining whether at least one datum of said plurality of data utilized for execution of said application program has been received, said at least one datum being a predetermined datum for starting execution of said application program, and starting execution of said application program when said predetermined datum has been received regardless of whether or not all of said plurality of data utilized for execution of said application program has been received;

wherein said processing unit, when there is at least an unreceived datum of said plurality of data utilized for execution of said application program, starts execution of said application program using a previously and most recently updated value of said unreceived datum as said unreceived datum, and received data.

8. A multi-processing system according to claim 7, wherein said storage stores code data corresponding to contents of said plurality of data utilized for execution of said application program.

9. A multi-processing system according to claim 8, wherein each of said multiple processors sends processed result data to said transmission path with at least one of said code data corresponding to the content of said processed result data.