CN111209143B - Recovery method and device of embedded system, embedded device and storage medium - Google Patents
Recovery method and device of embedded system, embedded device and storage medium Download PDFInfo
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- CN111209143B CN111209143B CN202010002724.5A CN202010002724A CN111209143B CN 111209143 B CN111209143 B CN 111209143B CN 202010002724 A CN202010002724 A CN 202010002724A CN 111209143 B CN111209143 B CN 111209143B
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- 238000011084 recovery Methods 0.000 title claims abstract description 74
- 238000000034 method Methods 0.000 title claims abstract description 32
- 238000003860 storage Methods 0.000 title claims abstract description 16
- 230000002159 abnormal effect Effects 0.000 claims abstract description 21
- 238000003825 pressing Methods 0.000 claims description 19
- 238000004590 computer program Methods 0.000 claims description 18
- 230000006837 decompression Effects 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 abstract description 19
- 230000006870 function Effects 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 238000004904 shortening Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 238000013500 data storage Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 238000003491 array Methods 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000002405 diagnostic procedure Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
- G06F11/14—Error detection or correction of the data by redundancy in operation
- G06F11/1402—Saving, restoring, recovering or retrying
- G06F11/1415—Saving, restoring, recovering or retrying at system level
- G06F11/1438—Restarting or rejuvenating
Abstract
The invention relates to the technical field of embedded equipment, and discloses a recovery method and device of an embedded system, the embedded equipment and a storage medium, wherein the method comprises the following steps: when the current state of the main system is an abnormal state and a restarting instruction is received, controlling the embedded equipment to restart, and detecting the state of a recovery key; when the state of the recovery key is detected to be a long-press state, switching to the standby system so that the standby system acquires the system firmware and recovers the main system according to the system firmware. The invention can realize the quick recovery of the abnormal embedded equipment, shortens the maintenance time and ensures the normal use of the embedded equipment; meanwhile, complicated recovery operation is avoided, and interruption of equipment service is avoided, so that user experience is improved.
Description
Technical Field
The present invention relates to the field of embedded devices, and in particular, to a method and apparatus for recovering an embedded system, an embedded device, and a storage medium.
Background
The embedded technology is a special computer system technology which is centered on application, is based on computer technology, can cut software and hardware, and is suitable for application systems with strict requirements on functions, reliability, cost, volume and power consumption. In recent years, with the development and popularization of embedded technology, embedded devices are increasingly used in various fields such as industry, agriculture, education, national defense, scientific research, and daily life.
In the use process of the embedded equipment, user misoperation can occur to delete important files started by the system, and sudden abnormal power failure can also occur to cause damage of certain files, so that the system is crashed, the embedded equipment cannot be started normally, and the normal use of the equipment is affected. When the situation occurs, two processing methods are generally adopted, one is that the manufacturer maintains the embedded equipment, for example, a user sends the damaged embedded equipment back to the manufacturer, and the manufacturer burns the firmware again; the other is that the user performs maintenance by himself, for example, the user re-burns the firmware according to a corresponding series of operations by installing a specific maintenance tool.
However, in carrying out the present invention, the present inventors have found that the prior art has at least the following technical problems: when the maintenance method is adopted by a manufacturer, the operation is complicated, so that the maintenance time is long, and the use of a user is influenced; when the method of self-maintenance by the user is adopted, the maintenance failure may be caused by improper operation in the maintenance process due to the difference of the technical level of the user, and the problem of long maintenance time also exists.
Disclosure of Invention
The invention aims to provide a recovery method and device of an embedded system, embedded equipment and a storage medium, which can quickly recover abnormal embedded equipment and shorten maintenance time so as to ensure normal use of the embedded equipment.
In order to solve the above technical problems, the present invention provides a method for recovering an embedded system, where an embedded device includes a main system and a standby system, and the method for recovering an embedded system includes:
when the current state of the main system is an abnormal state and a restarting instruction is received, controlling the embedded equipment to restart and detecting the state of a recovery key;
and when the state of the recovery key is detected to be a long-press state, switching to the standby system so that the standby system acquires system firmware and recovers the main system according to the system firmware.
Preferably, the detecting the state of the recovery key specifically includes:
detecting a current signal sent by the recovery key;
when the current signal sent by the recovery key is detected to be a pressing signal, judging whether the current level signal sent by the recovery key is continuously kept as the pressing signal within a preset time threshold;
and when the current signal sent by the recovery key is continuously kept as the pressing signal within the time threshold, determining that the state of the recovery key is a long-pressing state.
Preferably, when the state of the recovery key is detected to be a long-press state, switching to the standby system specifically includes:
when the state of the recovery key is detected to be a long-press state, modifying the current starting parameter of the embedded equipment to be a first starting parameter so as to enter the standby system; wherein the first start-up parameter is used to indicate entry into the standby system.
Preferably, the standby system acquires system firmware, and restores the main system according to the system firmware, which specifically includes:
the standby system formats the main system;
after formatting, mounting the main system, acquiring a compressed package of the system firmware from a backup area, and decompressing the compressed package of the system firmware to the main system;
and after decompression, the host system is not mounted.
Preferably, the method for recovering an embedded system further includes:
and starting the main system after the embedded equipment is started.
Preferably, after the embedded device is started, starting the main system specifically includes:
after the embedded equipment is started, selecting a second starting parameter as a current starting parameter of the embedded equipment so as to start the main system; wherein the second start-up parameter is used to indicate entry into the host system.
Preferably, the recovery key is a power key.
In order to solve the same technical problem, correspondingly, the embodiment of the invention also provides a recovery device of the embedded system, which comprises a processor, a memory and a computer program stored in the memory and configured to be executed by the processor, wherein the recovery method of the embedded system is realized when the processor executes the computer program.
In order to solve the same technical problems, the embodiment of the invention also provides an embedded device, which comprises the recovery device of the embedded system.
To solve the same technical problem, embodiments of the present invention further provide a computer-readable storage medium having a program stored thereon, which when executed, implements the vehicle diagnostic method described above.
Compared with the prior art, the invention provides a recovery method, a device, an embedded device and a storage medium of an embedded system, wherein when the current state of the main system is an abnormal state and the embedded device is restarted, when the state of a recovery key is detected to be a long-press state, the standby system is switched to, so that the standby system acquires system firmware and recovers the main system according to the system firmware, thereby realizing the rapid recovery of the abnormal embedded device, shortening the maintenance time and ensuring the normal use of the embedded device. Meanwhile, the embodiment of the invention can avoid complicated recovery operation and avoid interruption of equipment service, thereby improving user experience. In addition, the embodiment of the invention does not need to send the abnormal embedded equipment back to a manufacturer for maintenance, thereby reducing the maintenance cost of the manufacturer.
Drawings
FIG. 1 is a flowchart of a method for recovering an embedded system according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of an embedded device data storage according to an embodiment of the present invention;
FIG. 3 is a schematic diagram illustrating connection between a power key and a controller of an embedded device according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a recovery device of an embedded system according to an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the embodiment of the invention, the embedded equipment comprises a main system and a standby system; wherein the primary system and the backup system are both file systems of the embedded device. Specifically, in the embedded device, the data storage is divided as shown in fig. 2, and includes a Bootloader area 11, a uimage area 12, a rootfs-1 area 13, a rootfs-2 area 14, a recovery area 15, and a date area 16; the Bootloader area 11 is used for storing bootloaders (bootstrap programs) of devices, and u-boot suites are adopted in the Bootloader area; the uImage area 12 is a linux kernel used by the embedded device; the rootfs-1 area 13 and the rootfs-2 area 14 are the main system and the standby system respectively, and a recovery program is started to recover the main system after the standby system is started; the recovery area 15 is a backup area, and is used for storing a compressed packet for recovering the system firmware of the main system; the date area 16 is used for storing user codes and data thereof.
Referring to fig. 1, a flowchart of a method for recovering an embedded system according to an embodiment of the present invention is shown.
The recovery method of the embedded system provided by the embodiment of the invention comprises the following steps S11-S12:
s11, when the current state of the main system is an abnormal state and a restarting instruction is received, controlling the embedded equipment to restart, and detecting the state of a recovery key;
specifically, when a restart instruction sent by a user is received under the condition that the main system is in an abnormal state at present, the embedded equipment is controlled to restart so as to be electrified again, and then the state of the recovery key is detected; the state of the recovery key comprises a pressing state and a releasing state, and the pressing state comprises a short pressing state and a long pressing state.
It should be noted that, the user may send the restart instruction by pressing a power key of the embedded device. In addition, the user can judge whether the current state of the main system is an abnormal state or not by himself; of course, the embedded device may also detect the state of the main system in real time to identify whether the current state of the main system is an abnormal state, which is not limited in the present invention.
And S12, switching to the standby system when the state of the recovery key is detected to be a long-press state, so that the standby system acquires system firmware and recovers the main system according to the system firmware.
Specifically, when the state of the recovery key is detected to be a long-press state, the current system of the embedded device is switched to the standby system, namely the standby system is started, when the standby system operates, a preset main system updating script is executed, the system firmware is obtained from the backup area, and the main system in an abnormal state is recovered to a non-abnormal state according to the system firmware. It will be appreciated that the system firmware is used to restore the host system, which is pre-stored in the embedded device, to ensure that a quick restoration of the host system can be achieved.
Further, after the standby system acquires the system firmware and recovers the main system according to the system firmware, when the embedded device is restarted again, bootloader is restarted to operate on the recovered main system.
In the embodiment of the invention, when the current state of the main system is an abnormal state and the embedded equipment is restarted, the standby system is switched to when the state of the recovery key is detected to be a long-press state, so that the standby system acquires the system firmware and recovers the main system according to the system firmware, thereby realizing the rapid recovery of the abnormal embedded equipment, shortening the maintenance time and ensuring the normal use of the embedded equipment. Meanwhile, the embodiment of the invention can avoid complicated recovery operation and avoid interruption of equipment service, thereby improving user experience. In addition, the embodiment of the invention does not need to send the abnormal embedded equipment back to a manufacturer for maintenance, thereby reducing the maintenance cost of the manufacturer.
In the embodiment of the present invention, the type of the recovery key may be set according to actual use conditions, and preferably, the recovery key in this embodiment is a power key. The restoration of the main system is realized through the original power key in the embedded equipment, so that a hardware structure is not required to be added in the embedded equipment, and the increase of hardware cost is effectively avoided.
In a preferred embodiment, in step S11, the detecting the state of the recovery key specifically includes the following steps S111 to S113:
s111, detecting a current signal sent by the recovery key;
s112, judging whether the current level signal sent by the recovery key is continuously kept as the pressing signal within a preset time threshold value when the current signal sent by the recovery key is detected to be the pressing signal;
and S113, when the fact that the current signal sent by the recovery key is continuously kept as the pressing signal within the time threshold is judged, determining that the state of the recovery key is a long-pressing state.
In the following, for convenience of explanation, only the recovery key is taken as an example of the power key to describe the step S11 in the embodiment of the present invention in detail, and of course, the recovery key in the embodiment of the present invention is not limited to the power key.
As shown in fig. 3, in the embedded device, one end of the power key 22 is grounded, and the other end of the power key 22 is connected to a GPIO (General purpose input/output) pin of the controller 21 of the embedded device, so that the controller 21 receives a signal sent by the power key 22; the controller 21 of the embedded device may be an embedded CPU (central processing unit ). It can be understood that, when the power key 22 is pressed, the current signal sent by the power key 22 is a low level signal, that is, a pressing signal; therefore, when the current signal sent by the power key 22 is detected to be a low level signal, whether the power key 22 continuously sends the low level signal within a preset time threshold is judged, if so, the state of the power key 22 is determined to be a long-press state; if not, the state of the power key 22 is determined to be a short press state. In another embodiment, one end of the power key 22 is connected to an output end of a power supply, and the other end of the power key 22 is connected to one GPIO pin of the controller 21 of the embedded device; at this time, when the power key 22 is pressed, the current signal sent by the power key 22 is a high level signal, that is, a pressing signal; therefore, when the current signal sent by the power key 22 is detected to be a high level signal, whether the power key 22 continuously sends the high level signal within a preset time threshold is judged, if so, the state of the power key 22 is determined to be a long-press state; if not, the state of the power key 22 is determined to be a short press state.
In addition, it should be noted that the preset time threshold may be set according to actual use conditions, and the present invention is not limited.
In a preferred embodiment, in step S12, when the state of the recovery key is detected to be a long-press state, the method switches to the standby system, specifically includes:
when the state of the recovery key is detected to be a long-press state, modifying the current starting parameter of the embedded equipment to be a first starting parameter so as to enter the standby system; wherein the first start-up parameter is used to indicate entry into the standby system.
It should be noted that, in the embedded device, the boot environment variable of the Bootloader invokes a preset boot script to select a corresponding boot parameter to enter a different system, where the script invokes a checkio function.
In addition, in step S12, the standby system acquires system firmware, and restores the main system according to the system firmware, specifically including the following steps:
the standby system formats the main system;
after formatting, mounting the main system, acquiring a compressed package of the system firmware from a backup area, and decompressing the compressed package of the system firmware to the main system;
and after decompression, the host system is not mounted.
After entering the standby system, executing a preset main system updating script to format and mount the main system, decompressing the acquired compressed package of the system firmware to the main system, and finally canceling mounting the main system, thereby realizing recovery of the main system.
In the embodiment of the invention, the recovery method of the embedded system further comprises the following steps:
and starting the main system after the embedded equipment is started.
It can be appreciated that when the power key is pressed, the embedded device is started and enters the host system; at this time, in the embedded device, the host system is started by default.
Further, after the embedded device is started, starting the main system specifically includes:
after the embedded equipment is started, selecting a second starting parameter as a current starting parameter of the embedded equipment so as to start the main system; wherein the second start-up parameter is used to indicate entry into the host system.
Referring to fig. 4, another embodiment of the present invention correspondingly provides a recovery apparatus of an embedded system.
The recovery device 100 of the embedded system provided by the embodiment of the invention comprises a processor 101, a memory 102 and a computer program stored in the memory 102 and configured to be executed by the processor 101, wherein the recovery method of the embedded system is realized when the processor 101 executes the computer program.
Illustratively, the computer program may be partitioned into one or more modules/units that are stored in the memory 102 and executed by the processor 101 to accomplish the present invention. The one or more modules/units may be a series of computer program instruction segments capable of performing a specific function for describing the execution of the computer program in the recovery apparatus 100 of the embedded system.
The processor 101 may be a central processing unit (Central Processing Unit, CPU), but may also be other general purpose processors, digital signal processors (Digital Signal Processor, DSP), application specific integrated circuits (Application Specific Integrated Circuit, ASIC), off-the-shelf programmable gate arrays (Field-Programmable Gate Array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The memory 102 may be used to store the computer program and/or module, and the processor 101 may implement various functions of the recovery apparatus 100 of the embedded system by running or executing the computer program and/or module stored in the memory 102 and invoking data stored in the memory 102. The memory 102 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program (such as a sound playing function, an image playing function, etc.) required for at least one function, and the like; the storage data area may store data (such as audio data, phonebook, etc.) created according to the use of the handset, etc. In addition, the memory may include high-speed random access memory, and may also include non-volatile memory, such as a hard disk, memory, plug-in hard disk, smart Media Card (SMC), secure Digital (SD) Card, flash Card (Flash Card), at least one disk storage device, flash memory device, or other volatile solid-state storage device.
The modules/units integrated by the recovery device 100 of the embedded system may be stored in a computer readable storage medium if implemented as software functional units and sold or used as a separate product. Based on such understanding, the present invention may implement all or part of the flow of the method of the above embodiment, or may be implemented by a computer program to instruct related hardware, where the computer program may be stored in a computer readable storage medium, and when the computer program is executed by a processor, the computer program may implement the steps of each of the method embodiments described above. Wherein the computer program comprises computer program code which may be in source code form, object code form, executable file or some intermediate form etc. The computer readable medium may include: any entity or device capable of carrying the computer program code, a recording medium, a U disk, a removable hard disk, a magnetic disk, an optical disk, a computer Memory, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), an electrical carrier signal, a telecommunications signal, a software distribution medium, and so forth. It should be noted that the computer readable medium contains content that can be appropriately scaled according to the requirements of jurisdictions in which such content is subject to legislation and patent practice, such as in certain jurisdictions in which such content is subject to legislation and patent practice, the computer readable medium does not include electrical carrier signals and telecommunication signals.
It should be noted that the above-described apparatus embodiments are merely illustrative, and the units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed over a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. In addition, in the drawings of the embodiment of the device provided by the invention, the connection relation between the modules represents that the modules have communication connection, and can be specifically implemented as one or more communication buses or signal lines. Those of ordinary skill in the art will understand and implement the present invention without undue burden.
In addition, in order to solve the same technical problems, correspondingly, the embodiment of the invention also provides an embedded device, which comprises the recovery device of the embedded system.
In summary, the present invention provides a method, an apparatus, an embedded device, and a storage medium for recovering an embedded system, where after the working state of the main system is an abnormal state and the embedded device is restarted, when the state of the recovery key is detected to be a long-pressed state, the method switches to the standby system, so that the standby system obtains system firmware, and recovers the main system according to the system firmware, thereby implementing fast recovery of the abnormal embedded device, shortening maintenance time, and ensuring normal use of the embedded device. Meanwhile, the embodiment of the invention can avoid complicated recovery operation and avoid interruption of equipment service, thereby improving user experience. In addition, the embodiment of the invention does not need to send the abnormal embedded equipment back to a manufacturer for maintenance, thereby reducing the maintenance cost of the manufacturer.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that modifications and substitutions can be made by those skilled in the art without departing from the technical principles of the present invention, and these modifications and substitutions should also be considered as being within the scope of the present invention.
Claims (4)
1. The method for recovering the embedded system is characterized in that the embedded device comprises a main system and a standby system, and the method for recovering the embedded system comprises the following steps:
when the current state of the main system is an abnormal state and a restarting instruction is received, controlling the embedded equipment to restart and detecting the state of a recovery key;
when the state of the recovery key is detected to be a long-press state, switching to the standby system so that the standby system obtains system firmware and recovers the main system according to the system firmware;
the detecting the state of the recovery key specifically includes:
detecting a current signal sent by the recovery key;
when the current signal sent by the recovery key is detected to be a pressing signal, judging whether the current level signal sent by the recovery key is continuously kept as the pressing signal within a preset time threshold;
when the current signal sent by the recovery key is continuously kept as the pressing signal within the time threshold, determining that the state of the recovery key is a long-pressing state;
and when the state of the recovery key is detected to be a long-press state, switching to the standby system, wherein the method specifically comprises the following steps of:
when the state of the recovery key is detected to be a long-press state, modifying the current starting parameter of the embedded equipment to be a first starting parameter so as to enter the standby system; wherein the first start-up parameter is used for indicating to enter the standby system;
the standby system acquires system firmware and restores the main system according to the system firmware, and the method specifically comprises the following steps:
the standby system formats the main system;
after formatting, mounting the main system, acquiring a compressed package of the system firmware from a backup area, and decompressing the compressed package of the system firmware to the main system;
after decompression, the host system is canceled to be mounted;
the recovery method of the embedded system further comprises the following steps:
after the embedded equipment is started, starting the main system;
after the embedded equipment is started, starting the main system, which specifically comprises the following steps:
after the embedded equipment is started, selecting a second starting parameter as a current starting parameter of the embedded equipment so as to start the main system; wherein the second start-up parameter is used for indicating to enter the main system;
the recovery key is a power key.
2. A restoration apparatus of an embedded system, comprising a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor, the processor implementing the restoration method of an embedded system as recited in claim 1 when the computer program is executed by the processor.
3. An embedded device, characterized in that the embedded device comprises a restoration means of an embedded system as claimed in claim 2.
4. A computer-readable storage medium, wherein the storage medium has a program stored thereon, which when executed, implements the method of recovering an embedded system according to claim 1.
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| CN107315656A (en) * | 2017-06-12 | 2017-11-03 | 杭州电子科技大学 | The Embedded PLC software rejuvenation method and PLC of many kernels |
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