CN107219395B - A kind of detection method of RTC crystal oscillator - Google Patents
A kind of detection method of RTC crystal oscillator Download PDFInfo
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- CN107219395B CN107219395B CN201710369759.0A CN201710369759A CN107219395B CN 107219395 B CN107219395 B CN 107219395B CN 201710369759 A CN201710369759 A CN 201710369759A CN 107219395 B CN107219395 B CN 107219395B
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- 239000013078 crystal Substances 0.000 title claims abstract description 45
- 238000001514 detection method Methods 0.000 title claims abstract description 15
- 230000009514 concussion Effects 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims abstract description 11
- 238000012360 testing method Methods 0.000 claims abstract description 8
- 239000000463 material Substances 0.000 abstract description 3
- 230000001939 inductive effect Effects 0.000 description 4
- 239000000523 sample Substances 0.000 description 4
- 238000004321 preservation Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R23/00—Arrangements for measuring frequencies; Arrangements for analysing frequency spectra
- G01R23/02—Arrangements for measuring frequency, e.g. pulse repetition rate; Arrangements for measuring period of current or voltage
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
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Abstract
The invention discloses a kind of detection methods of RTC crystal oscillator, comprising: the setting of read status register A, B, C, and the data read are saved；Interrupt flag bit in register A, register B is set, keeps alarm interrupt effective；The current CMOS time is read, start_time is denoted as；The CMOS time is tuned up 1 second；Check alarm interrupt flag bit in register C whether effectively；Setting alarm clock, which interrupts, to be issued；It checks whether alarm interrupt issues, if issued, reads the CMOS time, be denoted as end_time；If end_time subtracted start_time not equal to 1 second, then it represents that the concussion of RTC crystal oscillator is problematic；Otherwise, it means that the concussion of RTC crystal oscillator is qualified；This method effectively can detect and identify that the problem of crystal oscillator frequency drifts out range improves test coverage to reduce the cost of our material logistics convenient for operation.
Description
Technical field
The present invention relates to the hardware detection methods of computer system, and in particular to can detect crystal oscillator frequency drift exception
The detection method of RTC crystal oscillator.
Background technique
The major function of RTC (Real Time Clock) crystal oscillator (32768Hz) is to provide vibration frequency to RTC block.Such as
Fruit is without this crystal oscillator, and the time of RTC is impossible to keep, and when server starts every time, operating system is with regard to none time base
Standard goes to calibrate.If certain RTC crystal oscillator works abnormal, the time of RTC is just inaccurate, means that operation in this way
The time of system is also inaccurate.
Time inaccuracy is intolerable for server, because this will cause serial significant problem, such as this
Platform server causes client huge with the rule of " valence is high preferential, time priority " in stock exchange, will be made to become visionary hope
Loss.
In an assembling process, the control to crystal oscillator quality is generally all only simple to survey for existing server, looks at the time
It is whether normal in a short time, without effectively detection and recognition methods.It thus cannot fundamentally solve crystal oscillator frequency drift
Out the problem of range, it is unfavorable for enterprise's control material logistics cost, also will affect the satisfaction rate of client.
As Chinese patent (application publication number CN103634121A) discloses " it is a kind of improve reliability of dynamic token time
System and method ", the system include dynamic token, crystal oscillator tester, computer and cipher server, and dynamic token has display
Device, crystal oscillator tester have crystal oscillator inductive probe, and crystal oscillator tester is connect by first serial with computer, and computer passes through the second string
Mouth is connect with dynamic token, and key server is connect with computer, and crystal oscillator tester is connected by crystal oscillator inductive probe and dynamic token
Connect, wherein token time that the crystal oscillator deviation and key server of the dynamic token for detecting crystal oscillator inductive probe are sent and
Token key generates token seed together, is sent to dynamic token to generate dynamic password.By means of the invention it is possible to guarantee just
True time starting dynamic token generates dynamic password, to improve the reliability and stability of dynamic token time.The invention
It is based primarily upon on crystal oscillator inductive probe and the crystal oscillator deviation of dynamic token is measured, so that dynamic token end can be accurate
Dynamic password is generated in time, ensure that effective verifying of the dynamic password to user identity；But still effectively it can not detect and identify
Crystal oscillator frequency drifts out the problem of range out.
Summary of the invention
Of the invention provides a kind of detection method of RTC crystal oscillator, for solving in the prior art, to what is installed in server
The problem of RTC crystal oscillator working performance, crystal oscillator frequency drift out range no effectively detection and recognition methods, thus cannot be from root
Prevent to be provided to marketing users with server product defective on this.
The present invention is achieved by the following technical programs:
A kind of detection method of RTC crystal oscillator, comprising the following steps:
S1: the setting of CMOS RAM state register A, B, C, and the number that will be read are read by I/O port (0*70)
According to preservation；
S2: setting register A, it realizes that the interruption in test process can be issued and is continuously updated with clock；
S3: the interrupt flag bit in setting register B keeps alarm interrupt effective；
S4: the current CMOS time is read, start_time is denoted as；
S5: the CMOS time is tuned up；
S6: check alarm interrupt flag bit in register C whether effectively；
S7: setting alarm clock, which interrupts, to be issued；
S8: checking whether alarm interrupt issues, if issued, reads the CMOS time, is denoted as end_time；If end_
Time subtracts start_time and tunes up the time not equal to CMOS in step S5, then it represents that the concussion of RTC crystal oscillator is problematic；Conversely,
Then indicate that the concussion of RTC crystal oscillator is qualified.
A kind of detection method of RTC crystal oscillator as described above in the step S8, is closed after testing in the concussion of RTC crystal oscillator
When lattice, the data of status register A, B, C of the step S1 CMOS RAM saved are restored in corresponding register.
A kind of detection method of RTC crystal oscillator as described above, in the step S5, the CMOS time is tuned up 1~5 second.
The invention has the advantages that
1, the problem of crystal oscillator frequency drifts out range effectively can be detected and identify, to reduce our material logistics
Cost, improve test coverage.
2, by the use of this method, it can effectively avoid the server flows that RTC crystal oscillator does not work into client's hand, cause
Customer complaint, to increase customer satisfaction degree and reduce link, cost after sale.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described.
Fig. 1 is flow chart of the invention；
Specific embodiment
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.
As shown in Figure 1, a kind of detection method of RTC crystal oscillator of the present invention, comprising the following steps:
S1: the setting of CMOS RAM state register A, B, C, and the number that will be read are read by I/O port (0*70)
According to preservation；
nativeReadCMOS(0x0a,&m_regA)；
nativeReadCMOS(0x0b,&m_regB)；
nativeReadCMOS(0x0c,&m_regC)；
S2: setting register A, it realizes that the interruption in test process can be issued and is continuously updated with clock；
nativeReadCMOS(0x0a,&tmp)；
nativeWriteCMOS(0x0a,tmp|0x0f)；
S3: the interrupt flag bit in setting register B keeps alarm interrupt effective；
nativeReadCMOS(0x0b,&tmp)；
nativeWriteCMOS(0x0b,tmp&0x02)
S4: the current CMOS time is read, start_time is denoted as；
readRTCTime(&startTime)
S5: the CMOS time is tuned up 1 second；
AddSecondToTime(&startTime,&m_alarmTimeCur,1)
S6: check alarm interrupt flag bit in register C whether effectively；
checkInterrupt(OpRtcFunc)
S7: setting alarm clock, which interrupts, to be issued；
S8: checking whether alarm interrupt issues, if issued, reads the CMOS time, is denoted as end_time；If end_
Time subtracted start_time not equal to 1 second, then it represents that the concussion of RTC crystal oscillator is problematic；Otherwise, it means that the concussion of RTC crystal oscillator is closed
Lattice.
readRTCTime(&endTime)
Further, the present embodiment, when the concussion of RTC crystal oscillator is qualified after testing, step S1 is saved in step S8
CMOS RAM status register A, B, C data, be restored in corresponding register.
nativeWriteCMOS(0x0a,m_regA)；
nativeWriteCMOS(0x0b,m_regB)；
nativeWriteCMOS(0x0c,m_regC)；
The technology contents of the not detailed description of the present invention are well-known technique.
Claims (3)
1. a kind of detection method of RTC crystal oscillator, which comprises the following steps:
S1: the setting of CMOS RAM state register A, B, C are read by the port I/O, and the data read are saved；
S2: setting register A, it realizes that the interruption in test process can be issued and is continuously updated with clock；
S3: the interrupt flag bit in setting register B keeps alarm interrupt effective；
S4: the current CMOS time is read, start_time is denoted as；
S5: the CMOS time is tuned up；
S6: check alarm interrupt flag bit in register C whether effectively；
S7: setting alarm clock, which interrupts, to be issued；
S8: checking whether alarm interrupt issues, if issued, reads the CMOS time, is denoted as end_time；If end_time subtracts
Start_time is gone to tune up the time not equal to CMOS in step S5, then it represents that the concussion of RTC crystal oscillator is problematic；Otherwise, it means that
The concussion of RTC crystal oscillator is qualified.
2. a kind of detection method of RTC crystal oscillator according to claim 1, which is characterized in that in the step S8, in RTC
When crystal oscillator concussion is qualified after testing, by the data of status register A, B, C of the step S1 CMOS RAM saved, it is restored to phase
In the register answered.
3. a kind of detection method of RTC crystal oscillator according to claim 1, which is characterized in that in the step S5, when CMOS
Between tune up 1~5 second.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710369759.0A CN107219395B (en) | 2017-05-23 | 2017-05-23 | A kind of detection method of RTC crystal oscillator |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710369759.0A CN107219395B (en) | 2017-05-23 | 2017-05-23 | A kind of detection method of RTC crystal oscillator |
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| CN109782841B (en) * | 2018-12-29 | 2020-09-11 | 百富计算机技术（深圳）有限公司 | Real-time clock implementation method based on RTC chip, terminal equipment and storage medium |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5017801A (en) * | 1989-03-23 | 1991-05-21 | Siemens Aktiengesellschaft | Method and apparatus for converting a gap-infested read-in clock into a gap-free read-out clock |
| CN102857197A (en) * | 2012-09-22 | 2013-01-02 | 福州大学 | Calibration method for improving frequency accuracy of built-in remote control (RC) oscillator |
| CN103105530A (en) * | 2013-01-08 | 2013-05-15 | 河北远东通信系统工程有限公司 | Detection method for frequency hopping changes of crystal oscillator |
| CN104122440A (en) * | 2014-07-24 | 2014-10-29 | 中国电子科技集团公司第二十九研究所 | Method for sensing crystal oscillator frequency shift |
-
2017
- 2017-05-23 CN CN201710369759.0A patent/CN107219395B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5017801A (en) * | 1989-03-23 | 1991-05-21 | Siemens Aktiengesellschaft | Method and apparatus for converting a gap-infested read-in clock into a gap-free read-out clock |
| CN102857197A (en) * | 2012-09-22 | 2013-01-02 | 福州大学 | Calibration method for improving frequency accuracy of built-in remote control (RC) oscillator |
| CN103105530A (en) * | 2013-01-08 | 2013-05-15 | 河北远东通信系统工程有限公司 | Detection method for frequency hopping changes of crystal oscillator |
| CN104122440A (en) * | 2014-07-24 | 2014-10-29 | 中国电子科技集团公司第二十九研究所 | Method for sensing crystal oscillator frequency shift |
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