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Instrument emergency display method and virtual machine monitor

A technology of virtual machine monitor and emergency display, applied in the direction of instrument, registration/indication of vehicle operation, registration/instruction, etc., can solve the problems of low reliability and safety, restart, black screen, etc., to improve safety and reliability performance, fast and reliable process, and comprehensive results

Pending Publication Date: 2020-06-05
中瓴智行(成都)科技有限公司
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

The Linux kernel code is huge and cannot be simplified, and there is a small probability of kernel failures
According to the ISO26262 safety display for automotive instrumentation, the instrumentation system needs to meet the requirements of ASIL B functional safety level, but the operating system using the Linux kernel as the full LCD instrumentation cannot meet this requirement
Whether it is Linux or QNX operating system, when the operating system kernel fails, it will cause serious problems such as black screen and restart
Especially if ADAS (Advanced Driving Assistant System, Advanced Driving Assistance System) assisted driving information is displayed on the instrument, these failures may lead to serious driving safety accidents
[0003] It can be seen that the emergency display of instruments in the prior art cannot cope with various faults, such as kernel faults, and thus the reliability and safety are low

Method used

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  • Instrument emergency display method and virtual machine monitor
  • Instrument emergency display method and virtual machine monitor
  • Instrument emergency display method and virtual machine monitor

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Embodiment approach

[0039] In step 101, the real-time operating system and the instrument display program are run on the virtual machine monitor. The virtual machine monitor initializes various internal modules, and then monitors in real time whether the real-time operating system is in an abnormal state. For step 101, an optional implementation manner: determine whether the real-time operating system is in an abnormal state according to a pre-registered abnormality monitoring type.

[0040] In this embodiment, the real-time operating system includes a kernel and an application layer. During monitoring, both the kernel and the application layer can be monitored. If the application layer needs to be monitored, the monitoring of the application layer can be registered in advance. type, and then monitor the application layer based on the monitoring type of the application layer to determine whether there is an abnormal state; abnormal. If both need to be monitored, then register the monitoring type...

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Abstract

The invention provides an instrument emergency display method and a virtual machine monitor. The instrument emergency display method is applied to a virtual machine monitor, the virtual machine monitor is connected with a virtual machine real-time operating system, and the method comprises the steps: determining whether the real-time operating system is in an abnormal state or not; when the real-time operating system is in an abnormal state, acquiring emergency instrument information to be displayed; and rendering the graph corresponding to the emergency instrument information to a display screen for display. According to the method, the safety and reliability of the real-time operating system are improved.

Description

technical field [0001] The present application relates to the technical field of hardware monitoring, in particular, to a method for emergency display of an instrument and a virtual machine monitor. Background technique [0002] Currently, LCD instruments use real-time operating systems such as Linux or QNX (Quick UNIX). The real-time operating system already has relatively complete open tools and graphics display framework support, and the isolation between application layers can be realized through the MMU (Memory Management Unit, memory management unit). Even if a module of the application layer in the system crashes, it will not affect the operation of other modules and the system kernel. The Linux kernel code is huge and cannot be simplified, and there is a small probability of kernel failures. According to the ISO26262 safety display for automotive instrumentation, the instrumentation system needs to meet the requirements of ASIL B functional safety level, but the op...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F11/07G06F9/455G07C5/08
CPCG06F11/0739G06F11/079G06F9/45558G07C5/0808G07C5/0825G06F2009/45591
Inventor 不公告发明人
Owner 中瓴智行(成都)科技有限公司
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