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Method for testing reinitialization device of computer

A technique of reinitialization, computer, applied in the computer field

Pending Publication Date: 2022-03-04
VTESCO TECH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to the state of the art, it is usually not tested anymore after that

Method used

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  • Method for testing reinitialization device of computer
  • Method for testing reinitialization device of computer
  • Method for testing reinitialization device of computer

Examples

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Embodiment Construction

[0022] According to the method of the present invention and as figure 1 The computer 2 shown is used in combination. The computer 2 executes at least L1, L2 software to drive the component M. This component can be, for example, an internal combustion engine M, and the computer 2 is an engine control computer. The L1 software has sensors 11 for observing the state of the component M and actuators 10 for influencing said state. Due to the possible criticality of actions manipulated by computer 2, computer 2 is protected. The first level of security is provided by L2 monitoring software. L2 monitoring software exchanges information with L1 via links 13,14. Additional sensors 12 can also be provided. The nonvolatile memory 3 enables recording of persistent information when the computer 2 is stopped, powered off, or reinitialized. Since the L2 software and / or the computer 2 may also be faulty, as described above, the computer 2 is equipped with an L3 reinitialization device 1...

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Abstract

A method of in-situ and in-run testing of a reinitialization device (1) of a computer (2), comprising an execution sequence and a verification sequence, the execution sequence being executed during execution of software (L1, L2) and comprising the following steps: incrementing a test counter, storing the test counter in a non-volatile memory (3), triggering a reinitialization of the computer (2), and verifying the test counter in the non-volatile memory (3). The verification sequence is executed when starting the software (L1, L2) and comprises the following steps:-reading the test counters from the non-volatile memory (3),-comparing the test counters, if it equals its initial value plus 1, reinitializing the test counter (CT), the test result being positive, and if it is greater than its initial value plus 1, the test result being negative.

Description

technical field [0001] The present invention relates to computers in critical environments, such as those used to control engines, and more particularly to methods enabling testing of the correct functioning of reinitialization means of such computers. Background technique [0002] Computers generally consist of hardware and software. Hardware is capable of executing software to perform component-driven functions. It is known to protect such a computer by adding to it at least one hardware and / or software module capable of monitoring the correct functioning of the computer and taking protective measures where appropriate. [0003] Such as figure 1 Shown, showing the organizational structure used in motor vehicles according to VDA standards, a computer 2 such as an engine computer executes L1 (Level 1) nominal software to ensure engine control functions. A first monitoring module in the form of L2 (Level 2) monitoring software monitors the correct functioning of the L1 sof...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F11/07G06F11/22
CPCG06F11/0739G06F11/0757G06F11/2284G06F11/076
Inventor J-L·布瓦耶X·纪尧姆
Owner VTESCO TECH GMBH