CN105788646B - A kind of RAM detection method and system - Google Patents
A kind of RAM detection method and system Download PDFInfo
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- CN105788646B CN105788646B CN201610188729.5A CN201610188729A CN105788646B CN 105788646 B CN105788646 B CN 105788646B CN 201610188729 A CN201610188729 A CN 201610188729A CN 105788646 B CN105788646 B CN 105788646B
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Abstract
The invention discloses a kind of RAM detection methods, including the inner space of RAM is divided into N parts of area of space, and a copy of it area of space are placed detection program as running space；Wherein, N is the positive integer not less than 2；Operation detection program to carry out the first detection processing to remaining N-1 parts of area of space respectively, obtains the first testing result；It after the completion of the first detection processing, will test in any part of area of space that program is copied in remaining N-1 parts of area of space, and the address in the detection program after copy be updated to the address for the area of space being now located at；The updated detection program in address is run, the area of space that detection program updated to address is located at originally carries out the second detection processing, obtains the second testing result；The fault condition of RAM is judged according to the first testing result and the second testing result.This method save the download times of detection program, to reduce the detection time of RAM.The invention also discloses a kind of RAM detection systems.
Description
Technical field
The present invention relates to embedded system detection fields, more particularly to a kind of RAM detection method and system.
Background technique
With the development of microprocessor technology, embeded processor is increasingly being applied to each neck of national economy
Domain.In various embeded processors, RAM (Random Access Memory, random access memory) is used as data and journey
The storage unit of sequence is an important component part, RAM it is normal whether, can be directly related to embeded processor normal
Work, in order to guarantee the correctness of data processing and the normal operation of program, it is right before embeded processor works to need
RAM is detected.
Existing detection method then is read out to the data in RAM by the way that RAM is written in preset data,
Then by judge the data of data and write-in read it is whether identical come judge RAM whether failure.But in this method by
The part space interior that detection program needs to occupy RAM when CPU detection therefore can only be first to part unappropriated in RAM
Space is detected, and is then detected again to another part space, therefore is needed to download and corresponded to the more of the inside RAM different address
A detection program, to achieve the purpose that detect whole spaces inside RAM, download time is long, causes RAM detection time long.
Therefore, how to provide a kind of RAM detection method that detection time is short and system is that those skilled in the art need at present
It solves the problems, such as.
Summary of the invention
The object of the present invention is to provide a kind of RAM detection method and system, do not need to download multiple detection programs, but only
Downloading one-time detection program can detect whole spaces in RAM, the download time of detection program be saved, to reduce
The detection time of RAM.
In order to solve the above technical problems, the present invention provides a kind of RAM detection methods, comprising:
The inner space of the RAM is divided into N parts of area of space, and empty using area of space described in a copy of it as operation
Between place detection program；Wherein, N is the positive integer not less than 2；
It runs the detection program to carry out the first detection processing to the remaining N-1 parts area of space respectively, obtains
First testing result；
After the completion of first detection processing, the detection program is copied to the remaining N-1 parts of area of space
In any part of area of space in, and the address in the detection program after copy is updated to the ground for the area of space being now located at
Location；
Run the updated detection program in address, the area of space that detection program updated to the address is located at originally
The second detection processing is carried out, the second testing result is obtained；
The fault condition of the RAM is judged according to first testing result and second testing result.
Preferably, the process of first detection processing and second detection processing specifically:
Preset initial data is divided into multiple groups preset data；
The preset data described in every group is written and read processing respectively.
Preferably, the process of the read-write processing specifically:
Region to be measured is written into the preset data；Wherein, when carrying out first detection processing, the region to be measured
For any part of area of space in the remaining N-1 parts of area of space；It is described to be measured when carrying out second detection processing
Region is the area of space that the updated detection program in the address is located at originally；
Read the data in the region to be measured；
Judge whether the data read and the preset data are identical, if it is, this time detection region to be measured
Normally；Otherwise, the area fault to be measured is this time detected.
It is preferably, described that the preset data is written before region to be measured further include:
Total data in the region to be measured is moved to another not tested ranging in addition to the region to be measured
In sequence the space occupied region, wherein N is not less than 3；
After the completion of detection processing, it will be moved to another in addition to the region to be measured and be not detected program occupancy
Area of space in total data be moved back in the region to be measured.
Preferably, N takes 3.
Preferably, this method further include:
When the RAM is worked normally, to the working procedure real-time perfoming ECC check run in the RAM.
In order to solve the above technical problems, the present invention also provides a kind of RAM detection systems, comprising:
Blocking unit, for the inner space of the RAM to be divided into N parts of area of space, and by space described in a copy of it
Detection program is placed as running space in region；Wherein, N is the positive integer not less than 2；
Detection unit, for running the detection program to carry out first to the remaining N-1 parts area of space respectively
Detection processing obtains the first testing result, and first testing result is sent to judging unit；It is updated to run address
Program is detected, the area of space that is located at carries out the second detection processing to detection program updated to the address originally, obtains the
Two testing results, and second testing result is sent to the judging unit；
Bit location is reset, for after the completion of first detection processing, the detection program to be copied to remaining N-1
In any part of area of space in part described area of space, and the address in the detection program after copy is updated to now to be located at
The address of area of space；
The judging unit, for judging the RAM's according to first testing result and second testing result
Fault condition.
Preferably, N takes 3.
Preferably, the system further include:
ECC check unit is used for when the RAM is worked normally, to the working procedure real-time perfoming run in the RAM
ECC check.
The present invention provides a kind of RAM detection method and systems, by operation detection program to the remaining space region N-1 parts of
Domain carries out the first detection processing, then which is copied to any part of space region in remaining N-1 parts of area of space
In domain, row address of going forward side by side updates, enable the updated detection program in address to detection program originally the area of space that is located at into
The second detection processing of row, it can be seen that, the present invention does not need to download multiple detection programs, but only downloading one-time detection program is
Whole spaces in RAM can be detected, the download time of detection program be saved, to reduce the detection time of RAM.
Detailed description of the invention
It to describe the technical solutions in the embodiments of the present invention more clearly, below will be to institute in the prior art and embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the invention
Example, for those of ordinary skill in the art, without creative efforts, can also obtain according to these attached drawings
Obtain other attached drawings.
Fig. 1 is a kind of flow chart of the process of RAM detection method provided by the invention；
Fig. 2 is the mistake of the first detection processing and the second detection processing in another kind RAM detection method provided by the invention
The flow chart of journey；
Fig. 3 is the flow chart of the process of the read-write processing in another kind RAM detection method provided by the invention；
Fig. 4 is a kind of RAM detection system provided by the invention.
Specific embodiment
Core of the invention is to provide a kind of RAM detection method and system, does not need to download multiple detection programs, but only
Downloading one-time detection program can detect whole spaces in RAM, the download time of detection program be saved, to reduce
The detection time of RAM.
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
Embodiment one
Shown in Figure 1 the present invention provides a kind of RAM detection method, Fig. 1 is a kind of RAM detection provided by the invention
The flow chart of the process of method；This method comprises:
Step s101: the inner space of RAM is divided into N parts of area of space, and using a copy of it area of space as operation
Detection program is placed in space；Wherein, N is the positive integer not less than 2；
Step s102: operation detection program to carry out the first detection processing to remaining N-1 parts of area of space respectively, obtains
First testing result；
Step s103: after the completion of the first detection processing, it will test program and be copied in remaining N-1 parts of area of space
In any part of area of space, and the address in the detection program after copy is updated to the address for the area of space being now located at；
Step s104: the operation updated detection program in address, the sky that detection program updated to address is located at originally
Between region carry out the second detection processing, obtain the second testing result；
Step s105: the fault condition of RAM is judged according to the first testing result and the second testing result.
The present invention provides a kind of RAM detection methods, are carried out by operation detection program to remaining N-1 parts of area of space
Then the detection program is copied in any part of area of space in remaining N-1 parts of area of space by the first detection processing, and
Address update is carried out, the updated detection program in address is enable to carry out the second inspection to the area of space that detection program is located at originally
Survey processing, it can be seen that, the present invention does not need to download multiple detection programs, but only downloading one-time detection program can be to RAM
Interior whole spaces are detected, and the download time of detection program are saved, to reduce the detection time of RAM.
Embodiment two
On the basis of embodiment one, the present invention also provides another RAM detection method, shown in Figure 2, Fig. 2
For the flow chart of the process of the first detection processing and the second detection processing in another kind RAM detection method provided by the invention；
The process of the first detection processing and the second detection processing in this method specifically:
Step s201: preset initial data is divided into multiple groups preset data；
Step s202: processing is written and read to every group of preset data respectively.
Wherein, the first detection processing in the present invention and the second detection processing are all made of above-mentioned steps progress.
It is understood that being directly to be carried out to preset initial data once when being detected in the prior art to RAM
Property write-in and read operation, when the complexity of preset initial data higher (have multiple test points), will lead to is needed
Often, required detection time is long for the detection wanted, and after preset initial data is divided into multiple groups preset data, every group of inspection
Measuring point reduces, therefore reduces detection number, to reduce the time needed for detection.
For example, it is assumed that there is M test point in preset initial data, detection number be test point number square time, i.e.,
Detection number is M2Secondary, after preset initial data is divided into two groups, every group of preset data includesA test point, two groups pre-
If the sum of detection number needed for data isCompared to before not being grouped, reduceSecondary detection.
In addition, shown in Figure 3, Fig. 3 is the process of the read-write processing in another kind RAM detection method provided by the invention
Flow chart；Here the process of read-write processing specifically:
Step s301: region to be measured is written into preset data；Wherein, when carrying out the first detection processing, region to be measured is
Any part of area of space in remaining N-1 parts of area of space；When carrying out the second detection processing, region to be measured is address update
The area of space that detection program afterwards is located at originally；
Step s302: the data in region to be measured are read；
Step s303: judging whether the data read are identical as preset data, if it is, this time detection region to be measured
Normally；Otherwise, area fault to be measured is this time detected.
It is understood that since RAM is the storage unit of data and program, it is possible to it will appear various faults, in order to
Various faults type is detected, needs to repeat repeated detection processing, presets different initial data every time, certainly,
The present invention is to the number of repetition of detection processing and is not specially limited, also without limitation to the content of preset initial data, work
Making personnel can sets itself according to the actual situation.
In addition, before step s301 further include:
Step s3011: another for being moved in addition to region to be measured by the total data in region to be measured is not detected
In program the space occupied region, wherein N is not less than 3；
Step s3012: after the completion of detection processing, it will be moved to another detected program in addition to region to be measured and account for
Total data in area of space is moved back in region to be measured.
It is understood that can be located at the data in region to be measured when carrying out detection processing due to RAM to script and cause brokenly
It is bad, therefore, the total data in region to be measured is moved to another before testing and is not detected program occupancy and without inspection
It surveys in the area of space of processing, that is, the useful data that can avoid storing up memory ram damages, and wants to realize aforesaid operations,
It needs that the space in RAM is at least divided into 3 parts of area of space.
Preferably, N here can take 3.
It is understood that when the space of RAM is divided into 3 parts, a area of space of detection program occupancy, remaining two
A area of space is as region to be measured in part area of space, another area of space can be placed as redundant area to
(preset data for the not instead of write-in that total data here refers to, is located in front of detection processing the total data surveyed in region
Useful data in RAM), the useful data in RAM can not only be avoided damage in this way, also avoided the space in RAM point
Number it is too many and the situation that causes detection process excessively complicated occurs.
Certainly, the present invention to the specific value of N and is not specially limited.
It is further known that every a area of space in RAM can be divided into a data field and a code by the present invention
Area, wherein detection program is placed in code area, and when detecting program operation used preset initial data be then located at
In the corresponding data field in code area where detection program；In addition, when carrying out the first detection processing or the second detection processing, read-write
Processing is carried out to the data field in region to be measured.
Preferably, this method further include:
When RAM is worked normally, to working procedure real-time perfoming ECC (the Error Checking and run in RAM
Correcting, error checking and correction) verification.
It is understood that the first detection processing with the second detection processing is produced when RAM stops working, to RAM itself
Raw failure is detected, and this failure will appear when write-in specific data every time, i.e. the first detection processing and the
Two detection processings are detected to the hard failure of RAM.And ECC check is the failure temporarily generated when working normally to RAM
Detected, this failure temporarily generated be not occur always, but occur once in a while (i.e. this time run when occur
Certain failure, but the failure does not occur when may run next time), i.e., ECC check can be to producing in RAM course of normal operation
Raw soft failure is detected.
Compared with embodiment one, preset initial data has been divided into multiple groups preset data by the present embodiment, is read respectively
Processing is write, detection number is reduced, to reduce the time needed for detection；Also, the present embodiment will before read-write processing
Total data in region to be measured removes, and avoids and damages to the useful data in region to be measured；And by the space in RAM
It is divided into 3 parts, can not only realizes above-mentioned purpose, detection process will not be made excessively complicated, meanwhile, the present embodiment also utilizes ECC
Verification detects the soft failure generated in RAM course of normal operation, the fault type multiplicity of detection, detection failure covering
Rate is high.
Shown in Figure 4 the present invention also provides a kind of RAM detection system, Fig. 4 is a kind of RAM inspection provided by the invention
Examining system.The system includes:
Blocking unit 11 for the inner space of RAM to be divided into N parts of area of space, and a copy of it area of space is made
Detection program is placed for running space；Wherein, N is the positive integer not less than 2；
Detection unit 12, for running detection program to carry out at the first detection to remaining N-1 parts of area of space respectively
Reason, obtains the first testing result, and the first testing result is sent to judging unit 14；Run the updated detection journey in address
Sequence, the area of space that detection program updated to address is located at originally carry out the second detection processing, obtain the second testing result,
And the second testing result is sent to judging unit 14；
Bit location 13 is reset, for program being will test and being copied to the remaining space N-1 parts of after the completion of the first detection processing
In any part of area of space in region, and the address in the detection program after copy is updated to the area of space being now located at
Address；
Judging unit 14, for judging the fault condition of RAM according to the first testing result and the second testing result.
Wherein, here blocking unit 11, detection unit 12 reset bit location 13 and judging unit 14 is respectively positioned on CPU
It is internal.Certainly, the present invention is not particularly limited this.
It is further known that every a area of space in RAM can be divided into a data field and a code by the present invention
Area, wherein detection program is placed in code area, and when detecting program operation used preset initial data be then located at
In the corresponding data field in code area where detection program；In addition, when carrying out the first detection processing or the second detection processing, read-write
Processing is carried out to the data field in region to be measured.
Preferably, N here can take 3.
Certainly, the present invention to the specific value of N and is not specially limited.
Preferably, the system further include:
ECC check unit 15 is used for when RAM is worked normally, to the school working procedure real-time perfoming ECC run in RAM
It tests.
It is understood that the first detection processing with the second detection processing is produced when RAM stops working, to RAM itself
Raw failure is detected, and this failure will appear when write-in specific data every time, i.e. the first detection processing and the
Two detection processings are detected to the hard failure of RAM.And ECC check is the failure temporarily generated when working normally to RAM
Detected, this failure temporarily generated be not occur always, but occur once in a while (i.e. this time run when occur
Certain failure, but the failure does not occur when may run next time), i.e., ECC check can be to producing in RAM course of normal operation
Raw soft failure is detected.
The present invention provides a kind of RAM detection systems, are carried out by operation detection program to remaining N-1 parts of area of space
Then the detection program is copied in any part of area of space in remaining N-1 parts of area of space by the first detection processing, and
Address update is carried out, the updated detection program in address is enable to carry out the second inspection to the area of space that detection program is located at originally
Survey processing, it can be seen that, the present invention does not need to download multiple detection programs, but only downloading one-time detection program can be to RAM
Interior whole spaces are detected, and the download time of detection program are saved, to reduce the detection time of RAM.
It should be noted that in the present specification, relational terms such as first and second and the like are used merely to one
A entity or operation with another entity or operate distinguish, without necessarily requiring or implying these entities or operation it
Between there are any actual relationship or orders.Moreover, the terms "include", "comprise" or its any other variant are intended to
Cover non-exclusive inclusion, so that the process, method, article or equipment for including a series of elements not only includes those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or setting
Standby intrinsic element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that
There is also other identical elements in the process, method, article or apparatus that includes the element.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest scope of cause.
Claims (9)
1. a kind of RAM detection method characterized by comprising
The inner space of the RAM is divided into N parts of area of space, and using area of space described in a copy of it as running space
Place detection program；Wherein, N is the positive integer not less than 2；
It runs the detection program to carry out the first detection processing to the remaining N-1 parts area of space respectively, obtains first
Testing result；
After the completion of first detection processing, the detection program is copied in the remaining N-1 parts of area of space
In any part of area of space, and the address in the detection program after copy is updated to the address for the area of space being now located at；
The updated detection program in address is run, the area of space that detection program updated to the address is located at originally carries out
Second detection processing obtains the second testing result；
The fault condition of the RAM is judged according to first testing result and second testing result.
2. the method according to claim 1, wherein first detection processing and second detection processing
Process specifically:
Preset initial data is divided into multiple groups preset data；
The preset data described in every group is written and read processing respectively.
3. according to the method described in claim 2, it is characterized in that, the process of the read-write processing specifically:
Region to be measured is written into the preset data；Wherein, when carrying out first detection processing, the region to be measured is surplus
Any part of area of space in remaining N-1 part area of space；When carrying out second detection processing, the region to be measured
The area of space being located at originally for the updated detection program in the address；
Read the data in the region to be measured；
Judge whether the data read and the preset data are identical, if it is, this time the detection region to be measured is normal；
Otherwise, the area fault to be measured is this time detected.
4. according to the method described in claim 3, it is characterized in that, described the preset data is written before region to be measured also
Include:
Total data in the region to be measured is moved to another detected program in addition to the region to be measured to account for
In area of space, wherein N is not less than 3；
After the completion of detection processing, it will be moved to another in addition to the region to be measured and be not detected the sky that program occupies
Between total data in region be moved back in the region to be measured.
5. according to the method described in claim 4, it is characterized in that, N takes 3.
6. the method according to claim 1, wherein this method further include:
When the RAM is worked normally, to the working procedure real-time perfoming ECC check run in the RAM.
7. a kind of RAM detection system characterized by comprising
Blocking unit, for the inner space of the RAM to be divided into N parts of area of space, and by area of space described in a copy of it
Detection program is placed as running space；Wherein, N is the positive integer not less than 2；
Detection unit, for running the detection program to carry out the first detection to the remaining N-1 parts area of space respectively
Processing, obtains the first testing result, and first testing result is sent to judging unit；Run the updated detection in address
Program, the area of space that detection program updated to the address is located at originally carry out the second detection processing, obtain the second inspection
It surveys as a result, and second testing result is sent to the judging unit；
Bit location is reset, for after the completion of first detection processing, the detection program to be copied to remaining N-1 parts of institute
It states in any part of area of space in area of space, and the address in the detection program after copy is updated to the space being now located at
The address in region；
The judging unit, for judging the failure of the RAM according to first testing result and second testing result
Situation.
8. system according to claim 7, which is characterized in that N takes 3.
9. system according to claim 7, which is characterized in that the system further include:
ECC check unit is used for when the RAM is worked normally, to the working procedure real-time perfoming ECC run in the RAM
Verification.
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| US7716542B2 (en) * | 2007-11-13 | 2010-05-11 | Faraday Technology Corp. | Programmable memory built-in self-test circuit and clock switching circuit thereof |
| DE102010002309B4 (en) * | 2010-02-24 | 2013-04-18 | Endress + Hauser Gmbh + Co. Kg | Method for checking the functionality of a memory element |
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