CN110297724A - Embedded software house dog design method, device, equipment and storage medium - Google Patents
Embedded software house dog design method, device, equipment and storage medium Download PDFInfo
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- CN110297724A CN110297724A CN201910570151.3A CN201910570151A CN110297724A CN 110297724 A CN110297724 A CN 110297724A CN 201910570151 A CN201910570151 A CN 201910570151A CN 110297724 A CN110297724 A CN 110297724A
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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
- G06F11/0703—Error or fault processing not based on redundancy, i.e. by taking additional measures to deal with the error or fault not making use of redundancy in operation, in hardware, or in data representation
- G06F11/0751—Error or fault detection not based on redundancy
- G06F11/0754—Error or fault detection not based on redundancy by exceeding limits
- G06F11/0757—Error or fault detection not based on redundancy by exceeding limits by exceeding a time limit, i.e. time-out, e.g. watchdogs
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Abstract
The invention discloses a kind of embedded software house dog design method, device, equipment computer storage medium, method includes: the first timed task for starting kernel, and passes through the first timed task timing dog-feeding and hello the dog state of detection application layer；Start the second timed task of application layer, and passes through hello the dog state of the second timed task timing dog-feeding and detection kernel；When first timed task detects that hello the dog abnormal state of application layer or the second timed task detect hello the dog abnormal state of kernel, then reset signal is triggered, system is restarted.It realizes kernel and is detected mutually with application layer, form interlocking mechanism and play the role of duplicate protection to system, and realize that system in abnormal cases can be relatively reliable restarts in embedded systems.
Description
Technical field
The present invention relates to embedded system application field more particularly to a kind of embedded software house dog design methods, dress
It sets, equipment and storage medium.
Background technique
House dog is common a kind of function mould for guaranteeing to be capable of reliable reset after system exception in Embedded System Design
Block.Especially under some severe working environments, the operation of built-in system software usually can be because of dry by external electromagnetic
Disturb, the rugged environments factor such as high/low temperature influences, cause occur unpredictable exception in system operation, fall into endless loop
And it can not self-resetting.Therefore it is typically necessary in the embedded system of commercialization and introduces house dog, guarantee system in exception
In the case of can automatically reset.House dog is generally divided into two kinds: internal house dog and outer watchdog.Internal house dog maintains one
A counter, the counting of this counter can successively decrease or be incremented by always after starting house dog, when external program is not to this
Counter carries out again assignment (be commonly called as ' feed dog '), the count of counter to zero or is incremented to spilling and will generate to CPU
One reset signal (being commonly called as ' dog stings '), restarts so that system will reset.Outer watchdog then needs to have within a certain period of time
The level of variation, which is input to, feeds dog pin, does not have level change that will trigger reset signal for a long time if feeding dog pin, causes
System reset is restarted.
But either internal house dog or outer watchdog, it is all to answer that house dog hello dog mechanism is relatively simple
Dog is directly fed with layer, the problem of although this mode is able to solve system reset under most of normal operation circumstances, but some
Under the working environment of inclement condition, reliability is low.
Summary of the invention
In view of the above-mentioned problems, the purpose of the present invention is to provide a kind of embedded software house dog design method, device, setting
Standby and storage medium realizes kernel and detects mutually with application layer, forms interlocking mechanism and plays duplicate protection to system
Effect, and realize that system in abnormal cases can be relatively reliable restarts in embedded systems.
In a first aspect, the embodiment of the invention provides a kind of embedded software house dog design methods, comprising:
Start the first timed task of kernel, and by the first timed task timing dog-feeding and detects application layer
Feed dog state；
Start the second timed task of application layer, and by the second timed task timing dog-feeding and detects kernel
Feed dog state；
In first timed task detects that hello the dog abnormal state of application layer or the second timed task detect
When feeding dog abnormal state of core, then trigger reset signal, restart system.
Preferably, it in the first timed task of starting kernel, and is answered by the timed task timing dog-feeding and detection
Before hello the dog state of layer, comprising:
Bootloader；
Started by the bootstrap Boot Dernel；
In the second timed task of the starting application layer, and pass through the second timed task timing dog-feeding and detection
Before hello the dog state of kernel, further includes:
Load driver, to run the application software in application layer.
Preferably, further includes:
In load Kernel-Process, when hardware watchdog does not receive feeding-dog signal within the third predetermined time, then triggering is multiple
Position signal, restarts system.
Second aspect, the embodiment of the invention provides a kind of embedded software house dogs to design device, comprising:
First timed task start unit is appointed for starting the first timed task of kernel, and by first timing
Hello the dog state for timing dog-feeding and the detection application layer of being engaged in；
Second timed task start unit for starting the second timed task of application layer, and passes through second timing
Hello the dog state of task timing dog-feeding and detection kernel；
Reset signal trigger unit, for when first timed task detect application layer feed dog abnormal state or
Second timed task detects when feeding dog abnormal state of kernel, then triggers reset signal, restart system.
Preferably, before the first timed task start unit, comprising:
Bootstrap start unit is used for Bootloader；
Kernel start unit, for being started by the bootstrap Boot Dernel；
Before the second timed task start unit, further includes:
Drive load unit is used for load driver, to run the application software in application layer.
Preferably, further includes:
System reboot unit is used for during the system startup process, when hardware watchdog does not receive within the third predetermined time
Feeding-dog signal then triggers reset signal, restarts system.
The third aspect, the embodiment of the invention provides a kind of embedded software house dogs to design equipment, including processor, deposits
The computer program of reservoir and storage in the memory, the computer program can be executed by the processor with reality
Now embedded software house dog design method as described in relation to the first aspect.
Fourth aspect, the embodiment of the invention provides a kind of computer readable storage medium, the computer-readable storage
Medium includes the computer program of storage, wherein controls the computer-readable storage medium in computer program operation
Equipment executes embedded software house dog design method as described in relation to the first aspect where matter.
In said one embodiment, by starting the first timed task of kernel, and it is fixed by first timed task
When feed dog and that detects application layer feeds dog state, and the second timed task by starting application layer, and pass through described the
Hello the dog state of two timed task timing dog-feedings and detection kernel, so that when first timed task detects application layer
It feeds dog abnormal state or the second timed task and detects when feeding dog abnormal state of kernel, reset signal can be triggered, restart and be
System.It realizes kernel and is detected mutually with application layer, form interlocking mechanism and play the role of duplicate protection, Yi Ji to system
Realize that system in abnormal cases can be relatively reliable restarts in embedded system, as long as while to guarantee that a side occurs abnormal,
Another party will trigger reset signal, system reboot.
Detailed description of the invention
In order to illustrate more clearly of technical solution of the present invention, attached drawing needed in embodiment will be made below
Simply introduce, it should be apparent that, the accompanying drawings in the following description is only some embodiments of the present invention, general for this field
For logical technical staff, without creative efforts, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is the flow diagram for the embedded software house dog design method that first embodiment of the invention provides.
Fig. 2 is another process signal for the embedded software house dog design method that first embodiment of the invention provides
Figure.
Fig. 3 is the structural schematic diagram for the embedded software house dog design device that second embodiment of the invention provides.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
For a better understanding of the technical solution of the present invention, being retouched in detail to the embodiment of the present invention with reference to the accompanying drawing
It states.
It will be appreciated that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Base
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts it is all its
Its embodiment, shall fall within the protection scope of the present invention.
The term used in embodiments of the present invention is only to be not intended to be limiting merely for for the purpose of describing particular embodiments
The present invention.In the embodiment of the present invention and the "an" of singular used in the attached claims, " described " and "the"
It is also intended to including most forms, unless the context clearly indicates other meaning.
It should be appreciated that term "and/or" used herein is only a kind of incidence relation for describing affiliated partner, indicate
There may be three kinds of relationships, for example, A and/or B, can indicate: individualism A, exist simultaneously A and B, individualism B these three
Situation.In addition, character "/" herein, typicallys represent the relationship that forward-backward correlation object is a kind of "or".
Depending on context, word as used in this " if " can be construed to " ... when " or " when ...
When " or " in response to determination " or " in response to detection ".Similarly, depend on context, phrase " if it is determined that " or " if detection
(condition or event of statement) " can be construed to " when determining " or " in response to determination " or " when the detection (condition of statement
Or event) when " or " in response to detection (condition or event of statement) ".
" first second " referred in embodiment be only be the similar object of difference, do not represent for the specific of object
Sequence, it is possible to understand that specific sequence or precedence can be interchanged in ground, " first second " in the case where permission.It should manage
The object that solution " first second " is distinguished is interchangeable under appropriate circumstances so that the embodiments described herein can in addition to
Here the sequence other than those of diagram or description is implemented.
Embodiment one:
Fig. 1 and Fig. 2 are please referred to, first embodiment of the invention provides a kind of embedded software house dog design method,
Equipment can be designed to execute by the embedded software house dog of above-described embodiment, particularly, be designed by embedded software house dog
One or more processors in equipment execute, and include at least following steps:
S101 starts the first timed task of kernel, and is answered by the first timed task timing dog-feeding and detection
Dog state is fed with layer.
S102 starts the second timed task of application layer, and passes through the second timed task timing dog-feeding and detection
Kernel feeds dog state.
In the present embodiment, contained inside the application layer house dog feed dog application and other application software or
Relevant service routine etc., here, the present invention repeats no more.
In the present embodiment, first timed task and the second timed task can set unlimited task, settable
What time which day idle, primary, daily, weekly, monthly, every year executes task, and (operation program prompting, shuts down, restarts, stopping
Sleep, quickly restart, quickly shutdown etc.), it is assumed for example that task definition is hello dog when fixed first, timing is 6 seconds, then every
6 seconds kernels just will do it a timing dog-feeding, and recycle always, similarly, it is assumed that task definition is when feeding dog, timing when fixed second
Between be 10 seconds, then just will do it a timing dog-feeding every 10 seconds application layers, and recycle always.
In the present embodiment, the timing dog-feeding, that is, house dog needs to feed dog, " regulation mentioned here at the appointed time
Time " is exactly that WatchDog Timer counts the spilling time, i.e., once reaching count threshold, house dog will generate reset signal.
CPU must be zeroed out processing to this timer within this period, allow WatchDog Timer to count again, prevent house dog
Generate reset signal.
S103, when first timed task detects hello dog abnormal state or the detection of the second timed task of application layer
To kernel when feeding dog abnormal state, then reset signal is triggered, system is restarted.
In the present embodiment, the kernel is combined with application layer, and that other side is also detected while respectively feeding dog feeds dog shape
State, as long as a side occurs abnormal, another party will trigger reset signal, system reboot so that kernel with apply formed it is interlocking
Mechanism plays the role of duplicate protection to system.Specifically, start the first timed task inside kernel, the first timing is appointed
Business, which periodically feeds dog and detects application layer, feeds the state of dog, if detecting that application layer feeds dog abnormal state for a long time, triggers
Reset signal, system reboot, and the state of dog is fed feeding periodically to feed dog inside dog application and detect kernel, if in detecting
Core feeds dog abnormal state for a long time, then triggers reset signal, system reboot.For convenient for the understanding of the present invention, below with reality
Application scenarios illustrate the application of the present embodiment:
Such as there are two variable a and b for kernel definition, wherein the b is the variable that kernel detects application layer；The a is to answer
The variable of kernel, the value of kernel timing more new variables a are detected with layer, while whether detecting the value of b for a long time without updating (b long
Time does not update, and it is abnormal to illustrate that application layer feeds dog), trigger reset signal if long-time is without updating, system reboot,
Similarly, application layer starting after periodically update the variable b of kernel, while detect a whether for a long time without update (a for a long time do not have
There is more new description kernel to feed dog abnormal), reset signal, system reboot are triggered if long-time is without updating.
To sum up, it realizes kernel and is detected mutually with application layer, form interlocking mechanism and duplicate protection is played to system
Effect, and realize that system in abnormal cases can be relatively reliable restarts in embedded systems, as long as while guaranteeing one
There is exception in side, and another party will trigger reset signal, system reboot.
On the basis of first embodiment, in a preferred embodiment of the present invention, before step S101, comprising:
Bootloader；
Started by the bootstrap Boot Dernel.
In the present embodiment, the bootstrap runs one section of code, then similar to the BIOS of computer after device power
Carry out self-test, initialization, the starting of last Boot Dernel.
Before step S102, further includes:
Load driver, to run the application software in the application software in application layer；
In the present embodiment, after the bootstrap Boot Dernel starting, kernel will then load each driving, if not having
These drivings are loaded, then are unable to run the driving such as relative application software, such as wifi, bluetooth and audio, if these drive
It does not load successfully, upper layer app can not just use wifi, bluetooth and the relevant function of audio.
It is on the basis of first embodiment, in a preferred embodiment of the present invention, further includes:
During the system startup process, when hardware watchdog does not receive feeding-dog signal within the third predetermined time, then triggering is multiple
Position signal, restarts system.
Second embodiment of the invention:
Referring to Fig. 3, second embodiment of the invention provides a kind of embedded software house dog design device, comprising:
First timed task start unit 100 for starting the first timed task of kernel, and passes through first timing
Hello the dog state of task timing dog-feeding and detection application layer；
Second timed task start unit 200, for starting the second timed task of application layer, and it is fixed by described second
When task timing dog-feeding and detection kernel feed dog state；
Reset signal trigger unit 300, for detecting hello the dog abnormal state of application layer when first timed task
Or second timed task detect kernel feed dog abnormal state when, then trigger reset signal, restart system.
On the basis of first embodiment, in a preferred embodiment of the present invention, in the first timed task start unit
Before 100, comprising:
Bootstrap start unit is used for Bootloader；
Kernel start unit, for being started by the bootstrap Boot Dernel；
Before the second timed task start unit 200, further includes:
Drive load unit is used for load driver, to run the application software in application layer.
On the basis of first embodiment, in a preferred embodiment of the present invention, further includes:
System reboot unit is used for during the system startup process, when hardware watchdog does not receive within the third predetermined time
Feeding-dog signal then triggers reset signal, restarts system.
Third embodiment of the invention provides a kind of embedded software house dog design equipment, including processor, memory
And the computer program of storage in the memory, the computer program can be executed by the processor to realize such as
Above-mentioned embedded software house dog design method.
Fourth embodiment of the invention provides a kind of computer readable storage medium, the computer readable storage medium packet
Include the computer program of storage, wherein where controlling the computer readable storage medium in computer program operation
Equipment executes such as above-mentioned embedded software house dog design method.
Illustratively, the computer program can be divided into one or more units, one or more of lists
Member is stored in the memory, and is executed by the processor, to complete the present invention.One or more of units can be with
It is the series of computation machine program instruction section that can complete specific function, the instruction segment is for describing the computer program embedding
Enter the implementation procedure in formula software watchdog design equipment.
The embedded software house dog design equipment may include, but are not limited to processor, memory.Art technology
Personnel are appreciated that the schematic diagram is only the example of embedded software house dog design equipment, do not constitute to embedded
Software watchdog designs the restriction of equipment, may include than illustrating more or fewer components, perhaps combine certain components or
Different components, such as embedded software house dog design equipment can also be set including input-output equipment, network insertion
Standby, bus etc..
Alleged processor can be central processing unit (Central Processing Unit, CPU), can also be it
His general processor, digital signal processor (Digital Signal Processor, DSP), specific integrated circuit
(Application Specific Integrated Circuit, ASIC), ready-made programmable gate array (Field-
Programmable Gate Array, FPGA) either other programmable logic device, discrete gate or transistor logic,
Discrete hardware components etc..General processor can be microprocessor or the processor is also possible to any conventional processor
Deng the control centre of embedded software house dog design equipment utilizes various interfaces and the entire embedded software of connection
The various pieces of part house dog design equipment.
The memory can be used for storing the computer program and/or module, and the processor is by operation or executes
Computer program in the memory and/or module are stored, and calls the data being stored in memory, described in realization
The various functions of embedded software house dog design equipment.The memory can mainly include storing program area and storing data
Area, wherein storing program area can application program needed for storage program area, at least one function (such as sound-playing function,
Image player function etc.) etc.；Storage data area, which can be stored, uses created data (such as audio data, electricity according to mobile phone
Script for story-telling etc.) etc..In addition, memory may include high-speed random access memory, it can also include nonvolatile memory, such as
Hard disk, memory, plug-in type hard disk, intelligent memory card (Smart Media Card, SMC), secure digital (Secure
Digital, SD) card, flash card (Flash Card), at least one disk memory, flush memory device or other volatibility are solid
State memory device.
Wherein, if the unit of embedded software house dog design integration of equipments is real in the form of SFU software functional unit
Now and when sold or used as an independent product, it can store in a computer readable storage medium.Based in this way
Understanding, the present invention realize above-described embodiment method in all or part of the process, can also be instructed by computer program
Relevant hardware is completed, and the computer program can be stored in a computer readable storage medium, the computer program
When being executed by processor, it can be achieved that the step of above-mentioned each embodiment of the method.Wherein, the computer program includes computer
Program code, the computer program code can be source code form, object identification code form, executable file or certain centres
Form etc..The computer-readable medium may include: can carry the computer program code any entity or device,
Recording medium, USB flash disk, mobile hard disk, magnetic disk, CD, computer storage, read-only memory (ROM, Read-Only
Memory), random access memory (RAM, Random Access Memory), electric carrier signal, telecommunication signal and software
Distribution medium etc..It should be noted that the content that the computer-readable medium includes can be according to making laws in jurisdiction
Requirement with patent practice carries out increase and decrease appropriate, such as in certain jurisdictions, according to legislation and patent practice, computer
Readable medium does not include electric carrier signal and telecommunication signal.
It should be noted that the apparatus embodiments described above are merely exemplary, wherein described be used as separation unit
The unit of explanation may or may not be physically separated, and component shown as a unit can be or can also be with
It is not physical unit, it can it is in one place, or may be distributed over multiple network units.It can be according to actual
It needs that some or all of the modules therein is selected to achieve the purpose of the solution of this embodiment.In addition, device provided by the invention
In embodiment attached drawing, the connection relationship between module indicate between them have communication connection, specifically can be implemented as one or
A plurality of communication bus or signal wire.Those of ordinary skill in the art are without creative efforts, it can understand
And implement.
The above is a preferred embodiment of the present invention, it is noted that for those skilled in the art
For, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also considered as
Protection scope of the present invention.
Claims (8)
1. a kind of embedded software house dog design method characterized by comprising
Start the first timed task of kernel, and passes through the first timed task timing dog-feeding and hello the dog of detection application layer
State；
Start the second timed task of application layer, and passes through hello the dog of the second timed task timing dog-feeding and detection kernel
State；
When first timed task detects that hello the dog abnormal state of application layer or the second timed task detect kernel
When feeding dog abnormal state, then reset signal is triggered, system is restarted.
2. embedded software house dog design method according to claim 1, which is characterized in that the first of starting kernel
Timed task, and by before hello the dog state of the timed task timing dog-feeding and detection application layer, comprising:
Bootloader；
Started by the bootstrap Boot Dernel；
In the second timed task of the starting application layer, and pass through the second timed task timing dog-feeding and detection kernel
Feed dog state before, further includes:
Load driver, to run the application software in application layer.
3. the embedded software house dog according to claim 1 designs device, which is characterized in that further include:
During the system startup process, when hardware watchdog does not receive feeding-dog signal within the third predetermined time, then reset letter is triggered
Number, restart system.
4. a kind of embedded software house dog designs device characterized by comprising
First timed task start unit, for starting the first timed task of kernel, and it is fixed by first timed task
When feed dog and detect application layer feed dog state；
Second timed task start unit for starting the second timed task of application layer, and passes through second timed task
Hello the dog state of timing dog-feeding and detection kernel；
Reset signal trigger unit, for detecting hello the dog abnormal state or second of application layer when first timed task
Timed task detects when feeding dog abnormal state of kernel, then triggers reset signal, restart system.
5. embedded software house dog according to claim 1 designs device, which is characterized in that opened in the first timed task
Before moving cell, comprising:
Bootstrap start unit is used for Bootloader；
Kernel start unit, for being started by the bootstrap Boot Dernel；
Before the second timed task start unit, further includes:
Drive load unit is used for load driver, to run the application software in application layer.
6. the embedded software house dog according to claim 1 designs device, which is characterized in that further include:
System reboot unit, for during the system startup process, feeding dog when hardware watchdog does not receive within the third predetermined time
Signal then triggers reset signal, restarts system.
7. a kind of embedded software house dog designs equipment, which is characterized in that including processor, memory and be stored in described
Computer program in memory, the computer program can be executed by the processor to realize that claims 1 to 3 such as is appointed
Embedded software house dog design method described in meaning one.
8. a kind of computer readable storage medium, which is characterized in that the computer readable storage medium includes the calculating of storage
Machine program, wherein equipment where controlling the computer readable storage medium in computer program operation is executed as weighed
Benefit requires embedded software house dog design method described in 1 to 3 any one.
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