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In-vehicle control device

A technology for control devices and writing units, applied in control devices, vehicle parts, transportation and packaging, etc., can solve problems such as large changes in processing capacity, and achieve the effect of processing load suppression

Active Publication Date: 2018-05-11
HITACHI ASTEMO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In this way, in a multi-core microcomputer, even if the ASIL is satisfied and the processing is distributed among multiple cores, since there is a possibility that the processing capability may vary greatly depending on how to implement the control of inter-core communication, how to implement the ASIL and the inter-core Communication becomes a big technical problem

Method used

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Embodiment 1

[0034] use figure 1 The configuration of the multi-core MCU (Micro Control Unit) 1 of this embodiment will be described.

[0035] figure 1 The configuration of the multi-core MCU 1 is shown. The multi-core MCU 1 is equipped with a first core 2 that executes a process whose safety level is ASIL, and a second core 3 that executes a process whose safety level is QM. The internal memory 4 is composed of an internal memory 5 for the first core, an internal memory 6 for the second core, and a shared memory 7 that can be used in common by the cores.

[0036] In addition, in this embodiment, two cores are provided, but it may be constituted by two or more cores. In addition, although the security level level of each core is set to ASIL and QM, it is also possible to define the process of a different security level level in the process in a core.

[0037] In addition, in this embodiment, ROM and RAM are not distinguished, but are collectively referred to as memory for description. ...

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Abstract

Provided is an in-vehicle control device which allows the giving and receiving of data via inter-core communication at the timing of a user, as well as being capable of minimizing processing load while satisfying safety requirements of different (lowest to highest) functional safety levels (ASIL) in the inter-core communication of a multicore microcomputer. The data communication between a plurality of cores (2, 3) is performed by a writing means for writing the data of a core register (11) into a region (8) of a shared memory (7) of the cores, where safety levels are set, using a hardware function (DMA or the like). The cores (2, 3) have different functional safety levels.

Description

technical field [0001] The invention relates to a vehicle control device. Background technique [0002] In recent years, technical and functional requirements for in-vehicle controls (functions) have become advanced and complicated. In the automotive industry, functional safety (ISO26262) has already been formulated, and corresponding processing in the on-board control device is also essential. In terms of functional safety, the safety level level (ASIL) representing the benchmark to be protected is established according to the function, and the implemented function needs to be processed according to the ASIL (ASIL is defined as QM (Quality Management) with the lowest safety level to the highest safety level The five stages of ASILD). Therefore, since the microcomputer needs to cope with not only the function but also the ASIL, there is a current situation that the number of processes to be executed further increases. [0003] In this case, in order to deal with the ever-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60R16/02G06F12/14G06F15/167
CPCB60R16/02G06F12/1416G06F12/1483G06F2212/1016G06F2212/1052G06F21/52G06F15/167B60W50/04B60W2050/0005G06F12/1081
Inventor 伊藤慎悟后藤广生福田毅
Owner HITACHI ASTEMO LTD