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Quick starting method of automobile electronic instrument integrated with reversing image module

A technology of automotive electronics and reversing images, which is applied in the direction of program loading/starting, instruments, vehicle components, etc., can solve problems such as time-consuming, long start-up time, and reversing images that cannot be displayed normally, so as to reduce the start-up time and speed up start-up Speed, the effect of reducing the time of serial port printing

Active Publication Date: 2020-08-18
MARELLI AUTOMOBILE ELECTRONIS GUANGZHOU CO LTD
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the original system of open source Linux is used as an electronic instrument, the original system loads many services and modules, and it will take a lot of time without cutting, and the startup time is long. If the start is not completed, the reversing image cannot be displayed normally, and you need to wait for the electronic instrument to start to complete before reversing, which will bring a lot of inconvenience

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  • Quick starting method of automobile electronic instrument integrated with reversing image module

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Embodiment Construction

[0016] like figure 1 As shown in the present invention, a method for quickly starting an automotive electronic instrument integrating a reversing image module includes the following steps:

[0017] S1, in the IPL, turn off the initialization of the watchdog and the security module, and only keep the ddr initialization;

[0018] S2, do not compile codes that are not related to the startup system, and perform invalid operations on the serial port;

[0019] S3, revise the order of u-boot; Do not compile the command irrelevant to starting the Linux system kernel in u-boot, only keep the command of compiling and starting the Linux system kernel;

[0020] S4, in u-boot, modify the I-Cache and D-Cache from the disable state to the enable state, and open the Cache function that comes with the EMMC;

[0021] S5, load and start the Linux system kernel in the form of code, change the No. 1 process script started by the Linux system from the systemd process script to the reversing camer...

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Abstract

The invention discloses a quick starting method of an automobile electronic instrument integrated with a reversing image module. The method comprises the following steps: by modifying related commandoperations of IPL, u-boot and Linux kernels, unrelated codes are not compiled by means of conditional compilation, and a serial port is subjected to failure operation to shorten the serial port printing time and increase the starting speed of the whole system; and the drive initialization priorities of MIPI_CSI and IIC core layers are modified to the highest, a system kernel thread is created, andregister configuration can be carried out on a reversing camera in the system kernel thread through an IIC protocol to make the configuration of the reversing camera and the starting of the system kernel in a parallel relationship. The starting time of calling the reversing camera by the system is shortened, and when the vehicle is in the reverse gear mode, the reversing image process can be directly started, so that the electronic instrument enters the reversing image mode.

Description

technical field [0001] The invention relates to the field of automotive electronic instruments, in particular to a quick start method for an automotive electronic instrument based on a Linux system. Background technique [0002] With the application of electronic technology in the automotive field more and more widely, various automotive electronic products have come out one after another. Under normal circumstances, the function of the reversing image is integrated in the central control car machine or the navigation entertainment system, but some cars do not install the central control equipment in order to save space, and integrate the function of the reversing image (that is, rear-view imaging) into the electronic instrument Inside. [0003] Due to the open source characteristics of the electronic instruments of the Linux system, the general electronic instruments adopt the Linux system. However, when the original system of open source Linux is used as an electronic in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F9/4401G06F9/445B60W50/14B60Q5/00
CPCG06F9/4406G06F9/4411G06F9/44505B60W50/14B60Q5/006B60W2050/143B60W2050/146
Inventor 陈彦宏肖剑浩李彦宏
Owner MARELLI AUTOMOBILE ELECTRONIS GUANGZHOU CO LTD