US 2015/0039865 A1Published application

Control Device for Vehicle

AssigneeHitachi Automotive Systems, Ltd.

InventorsTasuku Ishigooka, Fumio Narisawa, Hiroaki Komatsu

Life of this patent

Estimating the term…

Loading patent…

Abstract

If exclusive control is used when carrying out update processing or reference processing to a data buffer in a shared memory among plural arithmetic units, waiting time increases and it is difficult to guarantee a real time property. In a control device for vehicle according to the invention, a data buffer is multiplexed and each arithmetic unit carries out update processing and reference processing to a different multiplexed data buffer. Also, an arithmetic unit that is different from the arithmetic unit executing the data update processing synchronizes one data buffer updated by data update processing, with the multiplexed data buffer in a shorter time than an execution cycle of the data update processing.

Claims12

Dependent claims

A control device for vehicle including plural arithmetic units and a shared memory in which shared data accessed in common by the plural arithmetic units is stored redundantly, wherein in the control device

the shared memory has a program area and a data area,
the data area has plural data buffers in which the shared data is stored redundantly, corresponding to each of the plural arithmetic units,
the program area includes:
a data update processing unit for one arithmetic unit of the plural arithmetic units to update a data buffer corresponding to the one arithmetic unit, store new shared data, and report the update of the shared data to another control device of the plural arithmetic units;
a data synchronizing unit for the another arithmetic unit to copy the shared data in the data buffer corresponding to the one arithmetic unit to the data buffer corresponding to the another arithmetic unit after the report;
and
a data reference processing unit for the another arithmetic unit to refer to the data buffer corresponding to the another arithmetic unit.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 14/379,649Filed 28 Jan 2013
Priority: JP 2012-03692423 Feb 2012
Published: 5 Feb 2015
Term ends: Not estimatedThe source records don’t support an estimate.

Classification6 codes

G06F 9/3001
To perform operations on data operands: arithmetic instructions
B60R 16/02
Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits…:…
G06F 9/30032
To perform operations on data operands: movement instructions, e.g. move, shift, rotate, shuffle
G06F 9/52
Multiprogramming arrangements: program synchronisation; Mutual exclusion, e.g. by means of semaphores

Family

US 9,547,492 B2Related patent
US 2015/0039865 A1This patent

From the US filing history. Foreign family members aren’t listed.

Timeline

Citations

Open elsewhere

Building an agent or pulling many patents? Use the API or MCP server instead of scraping pages. Get an API key