CN110457158A - House dog implementation method, device, equipment and storage medium based on finite state machine - Google Patents
House dog implementation method, device, equipment and storage medium based on finite state machine Download PDFInfo
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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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- 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
- G06F11/0793—Remedial or corrective actions
Abstract
The invention discloses a kind of house dog implementation method, device, equipment and storage medium based on finite state machine.The present invention is by being divided into first state, the second state, the third state and the 4th state for system according to the finite state machine；In control Board Power up success, the finite state machine is transformed into the second state from first state；When detecting that the first signal and starting time are more than or equal to the first preset time, the finite state machine is transformed into the third state from the second state；If the starting time, which is more than or equal to the second preset time, does not detect first signal also, the finite state machine is transformed into the 4th state from the second state and issues second signal；When receiving the second signal, the finite state machine is transformed into first state from the 4th state.The present invention is capable of the feeding-dog signal of real-time detection processor submitting, realizes system auto-reset function, improves level of integrated system and reliability, reduces hardware cost.
Description
Technical field
The present invention relates to embedded computer system field more particularly to a kind of house dog realizations based on finite state machine
Method, apparatus, equipment and storage medium.
Background technique
Embedded computer system works in complex environment, and there may be external disturbances, and program to be caused to hang dead or run winged
The case where, so the house dog of monitoring programme operating status is the necessary functions of system.
Watchdog function usually has following several implementations: 1) using outer watchdog chip.Dog letter is fed due to CPU
Number be usually can just be exported in the final stage that system starts, so watchdog reset function should be shielded in system starting process
Energy.However so, if hanging extremely in CPU start-up course, system can not automatically reset.2) using inside embeded processor
Integrated Watch Dog Timer.Defect in this way is stablized not as good as independent watchdog chip, if program exception operates
Watchdog function is closed, then program hangs extremely to cannot achieve and automatically reset.3) it is constructed using controller by hardware description language
Watchdog function circuit.The present invention is based on the third implementation, realizes start-up course in conjunction with the use of finite state machine
Middle program hangs dead reset function.
Summary of the invention
The embodiment of the invention provides house dog implementation method, device, equipment and storage medium based on finite state machine,
It automatically resets to dead cannot achieve of extension during solving the problems, such as computer system starting in the prior art.
In a first aspect, the embodiment of the invention provides a kind of house dog implementation method based on finite state machine, the side
Method includes:
System is divided into first state, the second state, the third state and the 4th state according to the finite state machine；
On the system when electricity success, the finite state machine is transformed into the second state from first state；
When detecting that the first signal and starting time are more than or equal to the first preset time, by the finite state machine from the
Two-state is transformed into the third state；
If the starting time, which is more than or equal to the second preset time, does not detect first signal also, by the finite state machine
The 4th state is transformed into from the second state and issues second signal；
When receiving the second signal, the finite state machine is transformed into first state from the 4th state.
Preferably, the method also includes:
If detecting first abnormal signal in the third state, the finite state machine is turned from the third state
Change to the 4th state；
If the abnormity of power supply of the control veneer is detected in the third state, by the finite state machine from third
State is transformed into first state.
Preferably, the first state is initial state, and second state is starting state, and the third state is operation
State, the 4th state are power down state.
Preferably, first signal is feeding-dog signal, and the second signal is power-off signal.
Preferably, first signal is square-wave signal under normal circumstances, by the height for detecting first signal
Whether low level width is normal to judge first signal.
Preferably, the finite state machine includes combinational logic and sequential logic, and system mode is realized in combinational logic
Judgement and output, in sequential logic realize current system conditions and next system mode switching.
Preferably, described if the starting time is more than or equal to the second preset time and does not detect first signal also
Finite state machine is transformed into power down state and issues second signal
The output time of the second signal is 2S.
Second aspect, the embodiment of the invention provides a kind of house dog realization device based on finite state machine, the dress
It sets and includes:
Division module, for system to be divided into first state, the second state, the third state and the according to finite state machine
Four states；
First conversion module is used in control Board Power up success, by the finite state machine by first state
It is transformed into the second state；
Second conversion module, for inciting somebody to action when detecting that the first signal and starting time are more than or equal to the first preset time
The finite state machine is transformed into the third state from the second state；
Third conversion module, if not detecting first signal also more than or equal to the second preset time for starting the time
When, so that the finite state machine is transformed into the 4th state from the second state and issues second signal；
4th conversion module, for when receiving the second signal, the finite state machine to be turned from the 4th state
Change to first state.
The third aspect, the embodiment of the invention provides a kind of, and the house dog based on finite state machine realizes equipment, comprising: extremely
A few processor, at least one processor and computer program instructions stored in memory, when computer program refers to
Enable the method such as first aspect in above embodiment of realizing when being executed by processor.
Fourth aspect, the embodiment of the invention provides a kind of storage mediums, are stored thereon with computer program instructions, work as meter
The method such as first aspect in above embodiment is realized when calculation machine program instruction is executed by processor.
In conclusion the house dog implementation method provided in an embodiment of the present invention based on finite state machine, device, equipment and
Storage medium.The present invention by according to the finite state machine by system be divided into first state, the second state, the third state and
4th state；In control Board Power up success, the finite state machine is transformed into the second state from first state；When
When detecting the first signal and starting the time more than or equal to the first preset time, the finite state machine is converted from the second state
To the third state；If the starting time, which is more than or equal to the second preset time, does not detect first signal also, by the limited shape
State machine is transformed into the 4th state from the second state and issues second signal；It, will be described limited when receiving the second signal
State machine is transformed into first state from the 4th state.By the above-mentioned setting to the finite state machine, can start in system
When stage extension is dead or the operation phase hangs dead, the auto-reset function of system is realized by power-on and power-off again.The present invention can
The feeding-dog signal that real-time detection processor is sent out, realizes automatically reseting for system.It is also possible to improve the system integration
Degree and reliability reduce hardware cost.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, will make below to required in the embodiment of the present invention
Attached drawing is briefly described, for those of ordinary skill in the art, without creative efforts, also
Other drawings may be obtained according to these drawings without any creative labor.
Fig. 1 is the flow chart of house dog implementation method of the preferred embodiment of the present invention based on finite state machine.
Fig. 2 is the flow chart of another house dog implementation method of the preferred embodiment based on finite state machine of the present invention.
Fig. 3 is the structural schematic diagram of the house dog realization device based on finite state machine of the embodiment of the present invention.
Fig. 4 is that the house dog based on finite state machine of the embodiment of the present invention realizes the structural schematic diagram of equipment.
Specific embodiment
The feature and exemplary embodiment of various aspects of the invention is described more fully below, in order to make mesh of the invention
, technical solution and advantage be more clearly understood, with reference to the accompanying drawings and embodiments, the present invention is further retouched in detail
It states.It should be understood that specific embodiment described herein is only configured to explain the present invention, it is not configured as limiting the present invention.
To those skilled in the art, the present invention can be real in the case where not needing some details in these details
It applies.Below the description of embodiment is used for the purpose of better understanding the present invention to provide by showing example of the invention.
It should be noted that, in this document, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to
Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.In the absence of more restrictions, the element limited by sentence " including ... ", it is not excluded that including
There is also other identical elements in the process, method, article or equipment of the element.
Referring to Figure 1 and Fig. 2, the house dog implementation method based on finite state machine that the embodiment of the invention provides a kind of.
The present invention is by being divided into first state, the second state, the third state and the 4th state for system according to the finite state machine；
In control Board Power up success, the finite state machine is transformed into the second state from first state；When detecting
One signal and starting the time be more than or equal to the first preset time when, the finite state machine is transformed into third shape from the second state
State；If the starting time is more than or equal to the second preset time and does not detect first signal also, by the finite state machine from the
Two-state is transformed into the 4th state and issues second signal；When receiving the second signal, by the finite state machine from
4th state is transformed into first state.By the above-mentioned setting to the finite state machine, can be hung in system start-up phase dead
Or the operation phase hang it is dead when, the auto-reset function of system is realized by power-on and power-off again.The present invention being capable of real-time detection
The feeding-dog signal that processor is sent out, realizes automatically reseting for system.It is also possible to improve level of integrated system and reliable
Property, reduce hardware cost.
Described method includes following steps:
S1, system is divided into first state, the second state, the third state and the 4th shape according to the finite state machine
State；
Preferably, the first state is initial state, and second state is starting state, and the third state is operation
State, the 4th state are power down state.
S2, on the system electricity success when, the finite state machine is transformed into the second state from first state；
Specifically, in the present embodiment, CPLD is the Electromechanical Management module individually powered, for obtaining the work of the system
Make state.After the afterbody power supply 1.0V of the control veneer of the system is powered on successfully, the finite state machine is by initial
State is converted into starting state.
S3, when detect the first signal and starting the time be more than or equal to the first preset time when, by the finite state machine
The third state is transformed into from the second state；
Preferably, first signal is feeding-dog signal, and the second signal is power-off signal.
Specifically, setting starting state time counter timing since the starting time of system.When the Electromechanical Management mould
When block detects that the count value of the feeding-dog signal of processor output and the starting state time counter reaches the first preset time,
The finite state machine is transformed into run mode from starting state.It is understood that in the present embodiment, first preset time
For 45S, in another preferred embodiment, first preset time can be according to system loads time self-setting, herein
It is not especially limited.
If S4, starting time are more than or equal to the second preset time and do not detect first signal also, by the limited shape
State machine is transformed into the 4th state from the second state and issues second signal；
S5, when receiving the second signal, the finite state machine is transformed into first state from the 4th state；
Preferably, when the count value of the starting state time counter, which reaches 60S, does not also detect the feeding-dog signal,
Then the finite state machine is transformed into power down state from starting state.Power down state time counter is set to the finite state machine simultaneously
Power down time carry out timing, the power-off signal control system power down of at this moment Electromechanical Management module output 2S.After the 2S time
The finite state machine is transformed into initial state by power down state.It is understood that in the present embodiment, second preset time
For 60S, in another preferred embodiment, second preset time can be according to system loads time self-setting, herein
It is not especially limited.
Preferably, the method also includes:
If detecting first abnormal signal in the third state, the finite state machine is turned from the third state
Change to the 4th state；
Specifically, if detecting feeding-dog signal exception in run mode, the finite state machine is transformed into from run mode
Power down state.
If the abnormity of power supply of the control veneer is detected in the third state, by the finite state machine from third
State is transformed into first state.
Specifically, if the abnormity of power supply of the control veneer is detected in run mode, by the finite state machine from fortune
Row state is transformed into initial state.
Preferably, first signal is square-wave signal under normal circumstances, by the height for detecting first signal
Whether low level width is normal to judge first signal.
Specifically, the feeding-dog signal of the output of processor under normal circumstances is set as the square-wave signal of 1HZ, width 500ms.
The width of the feeding-dog signal low and high level is judged by 1HZ master clock to judge whether feeding-dog signal is normal.The high electricity of setting
Flat width register counter_width_H and low level width register counter_width_L.When the feeding-dog signal is
When low level, the high level width register counter_width_H is reset.When the feeding-dog signal is high level,
Then the high level width register counter_width_H adds 1.When the feeding-dog signal is high level, by the low electricity
Flat width register counter_width_L is reset.When the feeding-dog signal is low level, the low level width is deposited
Device counter_width_L adds 1.When the width of counter_width_L and counter_width_H is not 500ms, then will
The feeding-dog signal is determined as exception.It is understood that in the present embodiment, the width of the square-wave signal is set by programming
It sets, is not specifically limited herein.
Preferably, the finite state machine includes combinational logic and sequential logic, and system mode is realized in combinational logic
Judgement and output, in sequential logic realize current system conditions and next system mode switching.
Preferably, described if the starting time is more than or equal to the second preset time and does not detect first signal also
Finite state machine is transformed into power down state and issues second signal
The output time of the second signal is 2S.
Referring to Fig. 3, bright embodiment provides a kind of house dog realization device based on finite state machine, described device packet
It includes:
Division module 1 is used to that system to be divided into first state, the second state, the third state and the according to finite state machine
Four states；
First conversion module 2 is used in control Board Power up success, by the finite state machine by first state
It is transformed into the second state；
Second conversion module 3, for inciting somebody to action when detecting that the first signal and starting time are more than or equal to the first preset time
The finite state machine is transformed into the third state from the second state；
Third conversion module 4, if not detecting first letter also more than or equal to the second preset time for starting the time
Number when, so that the finite state machine is transformed into the 4th state from the second state and issue second signal；
4th conversion module 5, for when receiving the second signal, the finite state machine to be turned from the 4th state
Change to first state.
In addition, the house dog implementation method based on finite state machine in conjunction with Fig. 1 embodiment of the present invention described can be by
Equipment is realized based on the house dog of finite state machine to realize.Fig. 4 shows provided in an embodiment of the present invention based on finite state
The house dog of machine realizes the hardware structural diagram of equipment.
House dog based on finite state machine realizes that equipment may include processor 401 and be stored with computer program and refer to
The memory 402 of order.
Specifically, above-mentioned processor 401 may include central processing unit (CPU) or specific integrated circuit
(Application Specific Integrated Circuit, ASIC), or may be configured to implement implementation of the present invention
One or more integrated circuits of example.
Memory 402 may include the mass storage for data or instruction.For example it rather than limits, memory
402 may include hard disk drive (Hard Disk Drive, HDD), floppy disk drive, flash memory, CD, magneto-optic disk, tape or logical
With the combination of universal serial bus (Universal Serial Bus, USB) driver or two or more the above.It is closing
In the case where suitable, memory 402 may include the medium of removable or non-removable (or fixed).In a suitable case, it stores
Device 402 can be inside or outside data processing equipment.In a particular embodiment, memory 402 is nonvolatile solid state storage
Device.In a particular embodiment, memory 402 includes read-only memory (ROM).In a suitable case, which can be mask
ROM, programming ROM (PROM), erasable PROM (EPROM), the electric erasable PROM (EEPROM), electrically-alterable ROM of programming
(EAROM) or the combination of flash memory or two or more the above.
Processor 401 is by reading and executing the computer program instructions stored in memory 402, to realize above-mentioned implementation
Any one house dog implementation method based on finite state machine in example.
In one example, the house dog based on finite state machine realizes that equipment may also include communication interface 403 and bus
410.Wherein, as shown in figure 4, processor 401, memory 402, communication interface 403 are connected by bus 410 and completed each other
Communication.
Communication interface 403 is mainly used for realizing in the embodiment of the present invention between each module, device, unit and/or equipment
Communication.
Bus 410 includes hardware, software or both, and the house dog based on finite state machine is realized the component of equipment each other
It is coupled together.For example it rather than limits, bus may include accelerated graphics port (AGP) or other graphics bus, enhancing work
It is industry standard architecture (EISA) bus, front side bus (FSB), super transmission (HT) interconnection, Industry Standard Architecture (ISA) bus, unlimited
Bandwidth interconnection, low pin count (LPC) bus, memory bus, micro- channel architecture (MCA) bus, peripheral component interconnection (PCI) are total
Line, PCI-Express (PCI-X) bus, Serial Advanced Technology Attachment (SATA) bus, Video Electronics Standards Association part
(VLB) combination of bus or other suitable buses or two or more the above.In a suitable case, bus
410 may include one or more buses.Although specific bus has been described and illustrated in the embodiment of the present invention, the present invention considers to appoint
What suitable bus or interconnection.
In addition, the embodiment of the present invention can in conjunction with the house dog implementation method based on finite state machine in above-described embodiment
A kind of computer readable storage medium is provided to realize.Computer program instructions are stored on the computer readable storage medium；
The computer program instructions realize any one guarding the gate based on finite state machine in above-described embodiment when being executed by processor
Dog implementation method.
In conclusion the house dog implementation method provided in an embodiment of the present invention based on finite state machine, device, equipment and
Storage medium.The present invention by according to the finite state machine by system be divided into first state, the second state, the third state and
4th state；In control Board Power up success, the finite state machine is transformed into the second state from first state；When
When detecting the first signal and starting the time more than or equal to the first preset time, the finite state machine is converted from the second state
To the third state；If the starting time, which is more than or equal to the second preset time, does not detect first signal also, by the limited shape
State machine is transformed into the 4th state from the second state and issues second signal；It, will be described limited when receiving the second signal
State machine is transformed into first state from the 4th state.By the above-mentioned setting to the finite state machine, can start in system
When stage extension is dead or the operation phase hangs dead, the auto-reset function of system is realized by power-on and power-off again.The present invention can
The feeding-dog signal that real-time detection processor is sent out, realizes automatically reseting for system.It is also possible to improve the system integration
Degree and reliability reduce hardware cost.
It should also be noted that, the exemplary embodiment referred in the present invention, is retouched based on a series of step or device
State certain methods or system.But the present invention is not limited to the sequence of above-mentioned steps, that is to say, that can be according in embodiment
The sequence referred to executes step, may also be distinct from that the sequence in embodiment or several steps are performed simultaneously.
The above description is merely a specific embodiment, it is apparent to those skilled in the art that,
For convenience of description and succinctly, the system, module of foregoing description and the specific work process of unit can refer to preceding method
Corresponding process in embodiment, details are not described herein.It should be understood that scope of protection of the present invention is not limited thereto, it is any to be familiar with
Those skilled in the art in the technical scope disclosed by the present invention, can readily occur in various equivalent modifications or substitutions,
These modifications or substitutions should be covered by the protection scope of the present invention.
Claims (10)
1. a kind of house dog implementation method based on finite state machine characterized by comprising
System is divided into first state, the second state, the third state and the 4th state according to the finite state machine；
On the system when electricity success, the finite state machine is transformed into the second state from first state；
When detecting that the first signal and starting time are more than or equal to the first preset time, by the finite state machine from the second shape
State is transformed into the third state；
If the starting time is more than or equal to the second preset time and does not detect first signal also, by the finite state machine from the
Two-state is transformed into the 4th state and issues second signal；
When receiving the second signal, the finite state machine is transformed into first state from the 4th state.
2. the house dog implementation method according to claim 1 based on finite state machine, which is characterized in that the method is also
Include:
If detecting first abnormal signal in the third state, the finite state machine is transformed into from the third state
4th state；
If the abnormity of power supply of the control veneer is detected in the third state, by the finite state machine from the third state
It is transformed into first state.
3. the house dog implementation method according to claim 2 based on finite state machine, which is characterized in that first shape
State is initial state, and second state is starting state, and the third state is run mode, and the 4th state is power down state.
4. the house dog implementation method according to claim 3 based on finite state machine, which is characterized in that first letter
Number be feeding-dog signal, the second signal be power-off signal.
5. the house dog implementation method according to claim 3 based on finite state machine, which is characterized in that in normal condition
Under first signal be square-wave signal, first letter is judged by detecting the low and high level width of first signal
It is number whether normal.
6. the house dog implementation method according to claim 5 based on finite state machine, which is characterized in that the limited shape
State machine includes combinational logic and sequential logic, the judgement and output of system mode is realized in combinational logic, in sequential logic
Realize the switching of current system conditions and next system mode.
7. the house dog implementation method according to claim 6 based on finite state machine, which is characterized in that if the starting
Time is more than or equal to the second preset time and does not detect first signal also, and it is concurrent that the finite state machine is transformed into power down state
Second signal includes: out
The output time of the second signal is 2S.
8. a kind of house dog realization device based on finite state machine, which is characterized in that described device includes:
Division module, for system to be divided into first state, the second state, the third state and the 4th shape according to finite state machine
State；
The finite state machine is transformed into the by first state when for electricity success on the system by the first conversion module
Two-state；
Second conversion module will be described for when detecting that the first signal and starting time are more than or equal to the first preset time
Finite state machine is transformed into the third state from the second state；
Third conversion module, if do not detect first signal also more than or equal to the second preset time for starting the time,
So that the finite state machine is transformed into the 4th state from the second state and issues second signal；
4th conversion module, for when receiving the second signal, the finite state machine to be transformed into from the 4th state
First state.
9. a kind of house dog based on finite state machine realizes equipment characterized by comprising at least one processor, at least
The computer program instructions of one memory and storage in the memory, when the computer program instructions are by the place
It manages when device executes and realizes such as method of any of claims 1-7.
10. a kind of storage medium, is stored thereon with computer program instructions, which is characterized in that when the computer program instructions
Such as method of any of claims 1-7 is realized when being executed by processor.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111683443A (en) * | 2020-06-18 | 2020-09-18 | 北京百瑞互联技术有限公司 | Man-machine interaction method based on state machine |
| CN113641524A (en) * | 2021-08-09 | 2021-11-12 | 国家计算机网络与信息安全管理中心 | Reset method, device and equipment for single board starting overtime and readable storage medium |
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