Communication system and data rewriting method
AssigneeYazaki Corporation
InventorShohei YAMAMOTO
Life of this patent
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Abstract
Communication system and data rewriting method which can reduce the cost of an ECU are provided. A communication system includes a master ECU and a slave ECU configured to receive a communication frame from the master ECU, wherein the slave ECU includes a region for an operating program that controls a load connected to this slave ECU, and a region for a set value. The slave ECU is configured to rewrite the set value based on a communication frame transmitted from the master ECU.
Claims4
A communication system comprising:
- a master ECU configured to function as a master during communication;
- and
- a slave ECU configured to function as a slave during communication and to receive communication data from the master ECU;
- wherein
- the slave ECU includes a memory region for program in which a program for controlling a load connected to this slave ECU is stored, and a memory region for set value in which a set value used in the program stored in the memory region for program is stored, and
- the slave ECU is configured to rewrite the set value stored in the memory region for set value based on the communication data transmitted from the master ECU.
A method for rewriting data of an ECU that is configured to receive communication data including an identification part defined by a communication protocol and a data part, the data part including
- a set value used by a program for controlling a load connected the ECU itself, and
- information indicative of a target whose set value is to be rewritten,
- the method comprising:
- determination step of determining whether or not the ECU itself is the target to be rewritten based on the information indicative of the target whose set value is to be rewritten;
- and
- rewriting step of rewriting a current set value with the set value included in the received data part when the ECU itself is determined as the target to be rewritten in the determination step.
Dependencies are inferred from the claim text.