Control Device for Vehicle

摘要

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.

主权项

1. 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; anda data reference processing unit for the another arithmetic unit to refer to the data buffer corresponding to the another arithmetic unit.