CN111552516B - Rapid starting method of automobile electronic instrument integrated with backing image module - Google Patents
Rapid starting method of automobile electronic instrument integrated with backing image module Download PDFInfo
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- CN111552516B CN111552516B CN202010425038.9A CN202010425038A CN111552516B CN 111552516 B CN111552516 B CN 111552516B CN 202010425038 A CN202010425038 A CN 202010425038A CN 111552516 B CN111552516 B CN 111552516B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F9/00—Arrangements for program control, e.g. control units
- G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
- G06F9/44—Arrangements for executing specific programs
- G06F9/4401—Bootstrapping
- G06F9/4406—Loading of operating system
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
- B60Q5/00—Arrangement or adaptation of acoustic signal devices
- B60Q5/005—Arrangement or adaptation of acoustic signal devices automatically actuated
- B60Q5/006—Arrangement or adaptation of acoustic signal devices automatically actuated indicating risk of collision between vehicles or with pedestrians
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W50/00—Details of control systems for road vehicle drive control not related to the control of a particular sub-unit, e.g. process diagnostic or vehicle driver interfaces
- B60W50/08—Interaction between the driver and the control system
- B60W50/14—Means for informing the driver, warning the driver or prompting a driver intervention
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F9/00—Arrangements for program control, e.g. control units
- G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
- G06F9/44—Arrangements for executing specific programs
- G06F9/4401—Bootstrapping
- G06F9/4411—Configuring for operating with peripheral devices; Loading of device drivers
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F9/00—Arrangements for program control, e.g. control units
- G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
- G06F9/44—Arrangements for executing specific programs
- G06F9/445—Program loading or initiating
- G06F9/44505—Configuring for program initiating, e.g. using registry, configuration files
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W50/00—Details of control systems for road vehicle drive control not related to the control of a particular sub-unit, e.g. process diagnostic or vehicle driver interfaces
- B60W50/08—Interaction between the driver and the control system
- B60W50/14—Means for informing the driver, warning the driver or prompting a driver intervention
- B60W2050/143—Alarm means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W50/00—Details of control systems for road vehicle drive control not related to the control of a particular sub-unit, e.g. process diagnostic or vehicle driver interfaces
- B60W50/08—Interaction between the driver and the control system
- B60W50/14—Means for informing the driver, warning the driver or prompting a driver intervention
- B60W2050/146—Display means
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Abstract
The invention discloses a quick starting method of an automotive electronic instrument integrated with a reversing image module, which comprises the following steps: by modifying the relevant command operation of the IPL, the u-boot and the Linux kernel, the irrelevant codes are not compiled by means of conditional compiling, and the serial port is subjected to failure operation, so that the time for printing the serial port is shortened, and the starting speed of the whole system is accelerated; the method comprises the steps of modifying the drive initialization priority of an MIPI _ CSI core layer and an IIC core layer to be the highest, enabling a system kernel thread to be created, and accordingly conducting register configuration on a reversing camera in the system kernel thread through an IIC protocol, enabling the configuration of the reversing camera and the starting of a system kernel to be in a parallel relation, shortening the starting time of the system for calling the reversing camera, and enabling an electronic instrument to enter a reversing image mode when a vehicle is in a reversing mode by directly starting a reversing image process.
Description
Technical Field
The invention relates to the field of automotive electronic instruments, in particular to a method for quickly starting an automotive electronic instrument based on a Linux system.
Background
As electronic technology is applied more and more widely in the automotive field, various automotive electronic products are also coming out. Generally, the function of the back-up image is integrated in a central control car machine or a navigation entertainment system, but some cars can integrate the function of the back-up image (namely, rear-view imaging) into an electronic instrument in order to save space and avoid installing central control equipment.
Due to the characteristics of the opening source of the electronic instrument of the Linux system, the Linux system is adopted for general electronic instruments. However, when the original system of the open-source Linux is used as an electronic instrument, the original system has a lot of services and modules, a lot of time is consumed without cutting, the starting time is long, when the car needs to see the car backing image immediately after the car is ignited, if the electronic instrument is not started, the car backing image cannot be displayed normally, the car can be backed only by waiting for the completion of the starting of the electronic instrument, and therefore great inconvenience is brought.
Disclosure of Invention
The invention provides a method for quickly starting an automotive electronic instrument based on a Linux system, which can accelerate the starting speed of a reversing image module so as to improve user experience and improve safety performance.
The invention relates to a quick starting method of an automotive electronic instrument integrated with a reversing image module, which comprises the following steps:
s1, in IPL (initial program loader), closing watchdog and security module initialization, only preserving ddr (double data rate synchronous dynamic random access memory) initialization;
s2, uncompiling codes irrelevant to the starting system and carrying out failure operation on the serial port;
s3, modifying the command of u-boot (the boot loader of the embedded system); the command which is irrelevant to starting the Linux system kernel in the u-boot is not compiled, and only the command for compiling and starting the Linux system kernel is reserved;
s4, in u-boot, modifying the I-Cache (class I Cache) and the D-Cache (class D Cache) from disable state to enable state, and starting the Cache function of EMMC (embedded multimedia controller);
s5, loading and starting a Linux system kernel in a code form, changing a No. 1 process script started by the Linux system from a systemd process script into a reversing camera process script, and performing failure operation on a serial port;
s6, modifying the device drivers of the board-level driver and the chip-level driver of the system kernel; the board-level drive only reserves the equipment drive of the reversing camera, isolates the equipment drive without application requirements and does not start, and the chip-level drive only reserves the chip-level drive required by the board-level drive;
s7, modifying the drive initialization priority of the MIPI _ CSI and IIC (integrated circuit bus) core layer; adjusting the drive initialization priority of the MIPI _ CSI and IIC core layers to be the highest;
and S8, creating a kernel thread, and performing register configuration on the reversing camera in the kernel thread through an IIC protocol to enable the configuration of the reversing camera and the starting of the system kernel to be in a parallel relation.
The quick starting method of the automotive electronic instrument integrated with the reversing image module closes the watchdog of the IPL and the key operation of the initialization of the safety module, performs failure operation on the serial port, can reduce the time for printing the serial port and quickens the starting speed of the system. And the command operation of the u-boot is modified, only the command for compiling and starting the Linux system kernel is reserved, the volume of the u-boot can be reduced, the time for reading the u-boot from the EMMC is reduced, and the starting system kernel is loaded in a code form, so that the starting time of the system kernel can be reduced. Modifying the board-level driver and the chip-level driver of the kernel, modifying the drive initialization priority of the MIPI _ CSI and the IIC core layer to be the highest, and then after the drive initialization of the IIC core layer is completed, creating a system kernel thread, thereby performing register configuration on the reversing camera in the system kernel thread through an IIC protocol, and enabling the configuration of the reversing camera and the starting of the system kernel to be in a parallel relation. By modifying the relevant command operation of the IPL, the u-boot and the Linux kernel, the irrelevant codes are not compiled by means of conditional compiling, and the serial port is subjected to failure operation, so that the time for printing the serial port is shortened, and the starting speed of the whole system is accelerated; the method comprises the steps of modifying the drive initialization priority of an MIPI _ CSI core layer and an IIC core layer to be the highest, enabling a system kernel thread to be created, and accordingly conducting register configuration on a reversing camera in the system kernel thread through an IIC protocol, enabling the configuration of the reversing camera and the starting of a system kernel to be in a parallel relation, shortening the starting time of the system for calling the reversing camera, and enabling an electronic instrument to enter a reversing image mode when a vehicle is in a reversing mode by directly starting a reversing image process.
Drawings
Fig. 1 is a flow chart of a method for rapidly starting an automotive electronic instrument integrated with a reverse image module.
Detailed Description
As shown in fig. 1, the method for rapidly starting an automotive electronic instrument integrated with a reverse image module according to the present invention includes the following steps:
s1, in IPL, closing watchdog and safety module initialization, only preserving ddr initialization;
s2, uncompiling codes irrelevant to the starting system and carrying out failure operation on the serial port;
s3, modifying the command of u-boot; the command which is irrelevant to starting the Linux system kernel in the u-boot is not compiled, and only the command for compiling and starting the Linux system kernel is reserved;
s4, in the u-boot, modifying the I-Cache and the D-Cache from a disable state to an enable state, and starting the Cache function of the EMMC;
s5, loading and starting a Linux system kernel in a code form, changing a No. 1 process script started by the Linux system from a systemd process script into a reversing camera process script, and performing failure operation on a serial port;
s6, modifying the device drivers of the board-level driver and the chip-level driver of the system kernel; the board-level drive only reserves the equipment drive of the reversing camera, isolates the equipment drive without application requirements and does not start, and the chip-level drive only reserves the chip-level drive required by the board-level drive;
s7, modifying the drive initialization priority of the MIPI _ CSI and IIC core layer; adjusting the drive initialization priority of the MIPI _ CSI and IIC core layers to be the highest;
and S8, creating a kernel thread, and performing register configuration on the reversing camera in the kernel thread through an IIC protocol to enable the configuration of the reversing camera and the starting of the system kernel to be in a parallel relation.
In addition, after the V4L2 driving initialization of the reversing camera is finished, whether the vehicle is in a reverse gear mode or not is judged, when the vehicle is in the reverse gear mode, the data of the reversing camera is collected and a udev signal is reported to a user space, and otherwise, the operation is not carried out; after the system kernel is started, simultaneously running the backing-up image process script and the systemd process script of the No. 1 process script; analyzing accessed equipment nodes which can be used as input and output interfaces of the reversing camera equipment and the IP core, skipping a reversing image process to enter a starting systemd process script if the equipment nodes do not exist, and entering the reversing image process if the equipment nodes exist, thereby finishing starting the reversing image.
The quick starting method of the automotive electronic instrument integrated with the reversing image module closes the watchdog of the IPL and the key operation of the initialization of the safety module, performs failure operation on the serial port, can reduce the time for printing the serial port and quickens the starting speed of the system. And the command operation of the u-boot is modified, only the command for compiling and starting the Linux system kernel is reserved, the volume of the u-boot can be reduced, the time for reading the u-boot from the EMMC is reduced, and the starting system kernel is loaded in a code form, so that the starting time of the system kernel can be reduced. Modifying the board-level driver and the chip-level driver of the kernel, modifying the drive initialization priority of the MIPI _ CSI and the IIC core layer to be the highest, and then after the drive initialization of the IIC core layer is completed, creating a system kernel thread, thereby performing register configuration on the reversing camera in the system kernel thread through an IIC protocol, and enabling the configuration of the reversing camera and the starting of the system kernel to be in a parallel relation. After the V4L2 drive of the camera is initialized, judging whether the vehicle is in a reverse gear mode, acquiring camera data, reporting a udev signal to a user space, simultaneously operating a reverse image process and a systemd process, entering the systemd process if no equipment node which can be used as an input/output interface of the camera equipment and an IP core exists in analysis, and starting the reverse image process if no equipment node exists. By modifying the relevant command operation of the IPL, the u-boot and the Linux kernel, the irrelevant codes are not compiled by means of conditional compiling, and the serial port is subjected to failure operation, so that the time for printing the serial port is shortened, and the starting speed of the whole system is accelerated; the method comprises the steps of modifying the drive initialization priority of an MIPI _ CSI core layer and an IIC core layer to be the highest, enabling a system kernel thread to be created, and accordingly conducting register configuration on a reversing camera in the system kernel thread through an IIC protocol, enabling the configuration of the reversing camera and the starting of a system kernel to be in a parallel relation, shortening the starting time of the system for calling the reversing camera, and enabling an electronic instrument to enter a reversing image mode when a vehicle is in a reversing mode by directly starting a reversing image process.
The rapid starting method of the automobile electronic instrument integrated with the reversing image module comprises the step S8 that the reversing camera transmits picture data to an SOC (system on chip) embedded with a Linux system through an LVDS (low voltage differential signaling) interface. The hardware layer adopts 936 deserializing chips and 913 serializing chips of the TI for transmission, the linux operating system of the software layer uses an i2c tool to configure the reversing camera, and a gst-launch-1.0 tool is used for carrying out video acquisition on the reversing camera, so that the stability of data transmission of the reversing camera can be enhanced. And the electronic instrument uses the c189 chip to convert the RGB signal output by the SOC into the LVDS signal received by the screen, so that the process of calling the reverse image by the Linux system is accelerated, and the starting time of starting the reverse image is shortened.
The quick starting method of the automobile electronic instrument integrated with the reversing image module further comprises the following steps: and S9, the Linux system judges whether the vehicle is in a reverse gear mode or not by judging the CAN signal sent by the vehicle, analyzing the CAN signal and according to a user-defined protocol in the kernel drive. The method can accurately judge whether the automobile is in a reverse gear mode, and further shorten the starting time of calling the reverse image mode by the Linux system.
The quick starting method of the automobile electronic instrument integrated with the reversing image module further comprises the following steps: s10, in the process that the vehicle is in the reversing mode, the distance between the vehicle and the obstacle is calculated through reversing pictures collected by a picture recognition technology, and the vehicle-mounted audio system is used for sending alarms with different degrees to remind the approaching degree of the distance between the vehicle and the obstacle; the obstacle is marked by the AR technology, and the color of the obstacle mark is darker as the vehicle body is closer to the obstacle. By adding the AR technology and the picture technology identification technology on the basis of the function of collecting the camera video stream of the image for backing a car, a driver can clearly identify the distance between a car body and an obstacle, and backing a car can be quickly completed.
The quick starting method of the automobile electronic instrument integrated with the reversing image module further comprises the following steps: s11, when the vehicle is switched to the non-reverse mode, the Linux system kernel sends a SIGIO signal soft interrupt to the reverse image process, triggers the process quit operation in the soft interrupt service function to switch to the systemd process result, quits the reverse image mode, and returns to the interface of the electronic instrument.
Claims (5)
1. A quick starting method of an automotive electronic instrument integrated with a reversing image module is characterized by comprising the following steps:
s1, in IPL, closing watchdog and safety module initialization, only preserving ddr initialization;
s2, uncompiling codes irrelevant to the starting system and carrying out failure operation on the serial port;
s3, modifying the command of u-boot; the command which is irrelevant to starting the Linux system kernel in the u-boot is not compiled, and only the command for compiling and starting the Linux system kernel is reserved;
s4, in the u-boot, modifying the I-Cache and the D-Cache from a disable state to an enable state, and starting the Cache function of the EMMC;
s5, loading and starting a Linux system kernel in a code form, changing a No. 1 process script started by the Linux system from a systemd process script into a reversing camera process script, and performing failure operation on a serial port;
s6, modifying the device drivers of the board-level driver and the chip-level driver of the system kernel; the board-level drive only reserves the equipment drive of the reversing camera, isolates the equipment drive without application requirements and does not start, and the chip-level drive only reserves the chip-level drive required by the board-level drive;
s7, modifying the drive initialization priority of the MIPI _ CSI and IIC core layer; adjusting the drive initialization priority of the MIPI _ CSI and IIC core layers to be the highest;
and S8, creating a kernel thread, and performing register configuration on the reversing camera in the kernel thread through an IIC protocol to enable the configuration of the reversing camera and the starting of the system kernel to be in a parallel relation.
2. The method for rapidly starting an electronic instrument of an automobile integrating a reverse image module according to claim 1, wherein the step S8 further comprises the steps of:
s801, the reversing camera transmits the picture data to the SOC embedded with the Linux system through the LVDS signal interface.
3. The method for rapidly starting the electronic instrument of the automobile integrated with the reverse image module according to claim 1, characterized by further comprising the following steps:
and S9, the Linux system judges whether the vehicle is in a reverse gear mode or not by judging the CAN signal sent by the vehicle, analyzing the CAN signal and according to a user-defined protocol in the kernel drive.
4. The method for rapidly starting the electronic instrument of the automobile integrated with the reverse image module according to claim 1, characterized by further comprising the following steps:
s10, in the process that the vehicle is in the reversing mode, the distance between the vehicle and the obstacle is calculated through reversing pictures collected by a picture recognition technology, and the vehicle-mounted audio system is used for sending alarms with different degrees to remind the approaching degree of the distance between the vehicle and the obstacle; the obstacle is marked by the AR technology, and the color of the obstacle mark is darker as the vehicle body is closer to the obstacle.
5. The method for rapidly starting the electronic instrument of the automobile integrated with the reverse image module according to claim 1, characterized by further comprising the following steps:
s11, when the vehicle is switched to the non-reverse mode, the Linux system kernel sends a SIGIO signal soft interrupt to the reverse image process, triggers the process quit operation in the soft interrupt service function to switch to the systemd process result, quits the reverse image mode, and returns to the interface of the electronic instrument.
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| CN112256347B (en) * | 2020-10-22 | 2024-06-14 | 超越科技股份有限公司 | Method for reducing starting time of embedded Linux system |
| CN112817778A (en) * | 2021-01-27 | 2021-05-18 | 惠州Tcl移动通信有限公司 | Mobile terminal multiplexing module management method, system, terminal and storage medium |
| CN114237640A (en) * | 2021-12-15 | 2022-03-25 | 深圳市宏旺微电子有限公司 | Chip test control panel Uboot burning method based on serial port protocol |
| CN114827453B (en) * | 2022-03-08 | 2023-12-29 | 珠海亿智电子科技有限公司 | Starting device and method |
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