CN104699418B - The method and apparatus of abnormal restoring is carried out to safe digital card - Google Patents
The method and apparatus of abnormal restoring is carried out to safe digital card Download PDFInfo
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- CN104699418B CN104699418B CN201410130217.4A CN201410130217A CN104699418B CN 104699418 B CN104699418 B CN 104699418B CN 201410130217 A CN201410130217 A CN 201410130217A CN 104699418 B CN104699418 B CN 104699418B
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Abstract
The invention discloses the method and apparatus that abnormal restoring is carried out to safe digital card SD, wherein, this method includes：It is abnormal to determine that safe digital card SD occurs；Continue to send combined information to SD, the combined information includes clock signal and idle state command；It is determined that the time for sending combined information is more than setting time, SD driving initialization procedures are performed；Test is written and read to SD, if receiving the response message from SD, it is determined that be successfully recovered.The present invention program is not limited by equipment self structure, SD can not be re-powered and realize abnormal restoring.
Description
Technical field
The present invention relates to the information processing technology, more particularly to the method and apparatus of abnormal restoring is carried out to safe digital card.
Background technology
Safe digital card（SD, Secure Digital Memory Card）It is a kind of based on semiconductor fast-flash memory device
Memory device of new generation, it is divided into SD, miniSD etc. according to the difference of encapsulation, profile is variant, but has no essential distinction.
After SD is connected into main frame, main frame can be written and read operation, and data or write-in data are read from SD.In read-write operation
In, in fact it could happen that the situation of operation exception, specifically：Main frame（Host）After sending read write command to SD, wait for a period of time, SD
Still main frame is not responded, now, SD DATA0 pins measured, its always low level；It is low according to SD agreements
Level indicating SD is in busy（busy）State, also mention in SD agreements, after sending the read write command on a certain packet,
It can be completed in 500 milliseconds；Thus would know that, if DATA0 pins are still in busy within a period of time after 500 milliseconds
State, then it can determine that SD is in abnormality.
SD abnormal restoring is illustrated below.
It is attached between the processor and SD of main frame by multiple I/O interfaces, including the electricity of control SD restartings
Source I/O interface.In this kind equipment, SD power supplys and processor power supply are each independent, and are not attached to lead to.When there are SD exceptions, main frame
Control SD to be re-powered by power supply I/O interface, so, SD abnormal restoring is realized by the restarting to SD.
In practical application, because I/O interface is more in short supply, the processor of many equipment does not possess enough I/O interfaces and used
In the again upper electricity of abnormal restoring.In this case, SD power supplys and processor power supply be not by the way of being independently arranged, and adopts
With the mode directly connected；For this kind of situation, when SD is in abnormality, the uncontrollable SD of processor is restarted, it is impossible to extensive
Multiple abnormal, according to the mode all restarted to main frame and SD, its speed is slow, and will also influence other industry of main frame
Business, its exploitativeness are poor.
To sum up, many equipment are limited by its own structure, do not support that electricity is restarted on independent to SD under abnormality,
Lead to not complete abnormal restoring.
The content of the invention
The invention provides a kind of method that abnormal restoring is carried out to safe digital card, this method is not by equipment self structure
Limitation, SD can not be re-powered and realize abnormal restoring.
The invention provides a kind of equipment that abnormal restoring is carried out to safe digital card, the equipment is not limited by self structure
System, can not be re-powered to SD and realize abnormal restoring.
A kind of method that abnormal restoring is carried out to safe digital card, this method include：
It is abnormal to determine that safe digital card SD occurs；
Continue to send combined information to SD, the combined information includes clock signal and idle state command；
It is determined that the time for sending combined information is more than setting time, SD driving initialization procedures are performed；
Test is written and read to SD, if receiving the response message from SD, it is determined that be successfully recovered.
A kind of equipment that abnormal restoring is carried out to safe digital card, the equipment includes abnormal determining module, combined information is sent out
Give and initialization module and test determining module；
The abnormal determining module, it is abnormal to determine that SD occurs, to combined information transmission and initialization module transmission group
Close information and send instruction；
The combined information is sent and initialization module, receives combined information and sends instruction, continues to send combination letter to SD
Breath, the combined information include clock signal and idle state command；It is determined that the time for sending combined information is more than setting time,
SD driving initialization procedures are performed, test instruction is sent to the test determining module；
The test determining module, receive from combined information transmission and the test of initialization module instruction, to SD
Test is written and read, if receiving the response message from SD, it is determined that be successfully recovered.
From such scheme as can be seen that in the present invention, after determining that exception occurs in SD, continue to send combined information to SD；Really
Surely the time for sending combined information is more than setting time, performs SD driving initialization procedures；Test is written and read to SD, if receiving
To the response message from SD, it is determined that be successfully recovered.The present invention program is not re-powered to SD and realizes abnormal restoring,
So, no longer limited by equipment self structure, can be applied to any main frame.
Brief description of the drawings
Fig. 1 is the method indicative flowchart that the present invention carries out abnormal restoring to safe digital card；
Fig. 2 is the method flow diagram example that the present invention carries out abnormal restoring to safe digital card；
Fig. 3 is the device structure schematic diagram that the present invention carries out abnormal restoring to safe digital card.
Embodiment
For the object, technical solutions and advantages of the present invention are more clearly understood, with reference to embodiment and accompanying drawing, to this
Invention is further described.
The existing scheme that abnormal restoring is carried out to SD, it is only applicable to the power supply IO that processor provides control SD restartings
The host device of interface, the program are limited by structure.For the defect, the characteristics of combining SD agreements of the invention, using lasting
Combined information is sent in a manner of exciting SD to initialize to SD, realizes SD abnormal restoring.Referring to Fig. 1, to be of the invention to safety
Digital card carries out the method indicative flowchart of abnormal restoring, and it comprises the following steps：
Step 101, it is abnormal to determine that SD occurs.
It is abnormal to determine that SD occurs, existing scheme can be used to realize, it is, sending the read write command on a certain packet
Afterwards, if DATA0 pins are still in busy states within a period of time after 500 milliseconds, it is determined that SD is in abnormality.
Determination abnormal SD is not limited only to currently existing scheme, for example, can also realize in the following way：
Before exception occurs in the determination SD, this method also includes：Packet read-write operation is carried out to SD, to the number of read-write
Verified according to bag, if there is mistake, repeat the read-write operation of error data bag to SD, it is determined that the packet of read-write is still
Error, judge whether number of repetition is more than and repeat threshold value, if it is greater, then it is abnormal to determine that SD occurs, and to the packet of error
It is marked；If it is not greater, then being added up to number of repetition, return execution is described to repeat error data bag to SD
The step of read-write operation.The threshold value that repeats can be set according to actual conditions, to be likely to occur abnormal empirical value.
Step 102, continue to send combined information to SD, the combined information includes clock signal and idle state command.
Clock signal（CLK, Clock）, time interval signal when being the work of the digital circuits such as processor or bus, is one
Kind square-wave signal, makes all operations of digital computer all carry out in order.Also, SD agreements have an idle condition（CMD0）Life
Order, i.e. GO_IDLE_STATE orders；By this order, SD card can enter the free time（IDLE）State, and the order is in any shape
It can be initiated under state.
But inventor has found in actual application environment, when SD occurs abnormal, single sends CMD0 orders to it,
SD can not be made to enter IDLE state.And need to provide clock to SD while order.Based on case above, the invention provides
It is a kind of to send the mode of multigroup combined information to SD to activate SD, make it into idle condition.If SD can be made from abnormality
Into idle condition, then can continue to be written and read it operation, without by way of power supply restarting being recovered.
To SD send combined information implementation have it is a variety of, specifically such as:
SD CMD pins are drawn high, at least 74 clock signals are sent to SD；
Idle state command is sent to SD.
Tranmitting data register signal needs to draw high SD CMD pins；And when sending idle state command, CMD pins are not made special
Other places are managed, and can enter the transmission of line command naturally.
Step 103, it is determined that the time for sending combined information is more than setting time, SD driving initialization procedures are performed.
Inventor has found in actual applications, normally, initiates compound command to SD singles, SD can not be made to enter IDLE
State, therefore, the mode repeatedly sent is employed in the present invention, the setting time can be arranged as required to, for example, 2 seconds
In.
Step 104, test is written and read to SD, if receiving the response message from SD, it is determined that be successfully recovered.
When being written and read operation to SD, SD response message can be received, can determine that by the reception condition of response message
Whether it is successfully recovered.The packet for being written and read test can be the packet to malfunction before or be exclusively used in testing
Packet.
Further, test is written and read to SD, if being not received by the response message from SD, can return to execution step
102。
Using the present invention program, after determining that exception occurs in safe digital card SD, continue to send combined information to SD, described group
Closing information includes clock signal and idle state command；It is determined that the time for sending combined information is more than setting time, performs SD and drive
Dynamic initialization procedure；Test is written and read to SD, if receiving the response message from SD, it is determined that be successfully recovered.The present invention
Scheme is not re-powered to SD and realizes abnormal restoring, so, is no longer limited by equipment self structure, can be applied to appoint
What main frame.
Below by Fig. 2 flow, the method that abnormal restoring is carried out to the present invention illustrates, from SD read-write operation bag
Digital independent, data write-in, data erasing etc. are included, example is specifically used as using digital independent here.
It is the method flow diagram example that SD abnormal restorings are carried out in data read process, it includes following step referring to Fig. 2
Suddenly：
Step 201, packet read operation is carried out to SD.
Step 202, in packet reading process, the packet of reading is verified, if there is mistake, performs step
Rapid 203.
Step 203, repeat the read operation of error data bag to SD, determine that packet is read and still fail, perform
Step 204, otherwise, the reading from SD progress packets is continued.Step 204, judge whether number of repetition is more than and repeat threshold value, such as
Fruit is more than, then performs step 205；If it is not greater, then perform step 206.
The initial value of number of repetition is 0, often re-reads a packet, then is number of repetition superposition 1.In this example,
Assuming that number of repetition is 3.
Step 205, it is abnormal to determine that SD occurs, and the packet of error is marked, performs step 207.
Packet is marked, when can be easy to subsequently be successfully recovered, continues to read and write since the packet of mark
Operation.
Step 206, number of repetition is added up, packet, which returns, performs step 203.Step 207, continue to send to SD
Combined information, the combined information include clock signal and idle state command.
Clock signal（CLK, Clock）, time interval signal when being the work of the digital circuits such as processor or bus, is one
Kind square-wave signal, makes all operations of digital computer all carry out in order.And the operation of the microcontroller in SD card is to be based on
The CLK that main frame provides, as long as there is CLK to exist, the microcontroller in SD card will not stop work works, also be possible to processing idle condition
（CMD0）Order.
In the present invention, when SD occurs abnormal, idle state command, i.e. GO_IDLE_STATE orders are sent to SD；Pass through
This order, SD card can enter the free time（IDLE）State.When sending idle state command, also clock information is provided simultaneously for it
Number.Here, by repeatedly sending combined information, to excite SD to enter idle condition；SD is set to enter idle condition from abnormality,
And then enter back into transfer（transfer）State, it can continue to be written and read it operation afterwards.
Step 208, whether the time for judging to send combined information is more than setting time, if it is, step 209 is performed,
Otherwise continue to send combined information, until reaching setting time.
Step 209, SD driving initialization procedures are performed.
Specifically, main frame performs the SD card abnormality processing function in SD drivings（mmc_blk_reset）, the function is performed,
The SD modules in main frame can be initialized, and initialization command can be sent to SD simultaneously, to notify SD to be initialized.
In this example, host operating system is specially linux system.
Step 210, test data bag is sent to SD, judges whether to receive the response message from SD, if it is, really
Surely it is successfully recovered, performs step 211；Otherwise, return and perform step 207.
Test data bag is sent to SD, if receiving the response message from SD, shows that SD is normal, determines extensive
Multiple success.
Step 211, continue to read the packet after marking from SD.
CMD pins are placed in at least 74 CLK and CMD0 orders sent under high level state as a combined sequence.
Single sends the combined sequence, and abnormality SD generally cannot be introduced into IDLE state.The present invention is used and repeatedly cycled through
The combined sequence, and the mode continued for some time, realize and operated without hardware power, and SD is entered IDLE by unknown state
State.System for that in system operation, hardware power control can not be carried out by program, SD is added to by the method
It is the abnormality processing initial period of driving, reliable and stable.
Referring to Fig. 3, the device structure schematic diagram for the present invention to SD progress abnormal restorings, the equipment includes exception and determines mould
Block, combined information are sent and initialization module and test determining module；The abnormal determining module, combined information are sent and initial
Change module and test determining module, the structure that specially processor includes in host device.
The abnormal determining module, it is abnormal to determine that SD occurs, to combined information transmission and initialization module transmission group
Close information and send instruction；
The combined information is sent and initialization module, receives combined information and sends instruction, continues to send combination letter to SD
Breath, the combined information include clock signal and idle state command；It is determined that the time for sending combined information is more than setting time,
SD driving initialization procedures are performed, test instruction is sent to the test determining module；
The test determining module, receive from combined information transmission and the test of initialization module instruction, to SD
Test is written and read, if receiving the response message from SD, it is determined that be successfully recovered.
It is preferred that the equipment also includes functional check module, packet read-write operation is carried out to SD, to the packet of read-write
Verified, if there is mistake, repeat the read-write operation of error data bag to SD, it is determined that the packet of read-write still goes out
Mistake, judge whether number of repetition is more than and repeat threshold value, if it is greater, then it is abnormal to notify that the abnormal determining module SD occurs, and
The packet of error is marked；If it is not greater, then being added up to number of repetition, return execution is described to be repeated to SD
The read-write operation of row error data bag.
It is preferred that the test determining module sends to the functional check module and read after determining to be successfully recovered
Write recovery instruction；
The functional check module, receive the read-write from the test determining module and recover instruction, if packet is read
Write operation is read operation, then continues to read the packet of mark from SD；If packet read-write operation is write operation, from mark
Data start continue to SD carry out data write-in.
It is preferred that the combined information is sent and initialization module includes combined information sending submodule and initialization submodule
Block,
The combined information sending submodule, receive combined information and send instruction, continue to send combined information to SD, it is determined that
The time for sending combined information is more than setting time, and reset indication is sent to the initialization submodule；
The initialization submodule, the reset indication from the combined information sending submodule is received, initialize main frame
Interior SD modules, and initialization command is sent to notify SD to be initialized to SD；Test is sent to the test determining module
Instruction.
The combined information sending submodule draws high SD CMD pins when sending combined information to SD, to SD send to
Few 74 clock signals, and send idle state command.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
God any modification, equivalent substitution and improvements done etc., should be included within the scope of protection of the invention with principle.
Claims (10)
- A kind of 1. method that abnormal restoring is carried out to safe digital card, it is characterised in that this method includes：It is abnormal to determine that safe digital card SD occurs；Continue to send combined information to SD, the combined information includes clock signal and idle state command；It is determined that the time for sending combined information is more than setting time, SD driving initialization procedures are performed；Test is written and read to SD, if receiving the response message from SD, it is determined that be successfully recovered.
- 2. the method as described in claim 1, it is characterised in that before exception occurs in the determination SD, this method also includes：Packet read-write operation is carried out to SD, the packet of read-write is verified, if there is mistake, repeats to malfunction to SD The read-write operation of packet, it is determined that the packet of read-write still malfunctions, judge whether number of repetition is more than and repeat threshold value, if greatly In, it is determined that there is exception in SD, and the packet of error is marked；If it is not greater, then number of repetition is added up, Return perform it is described repeat read-write operation from error data bag to SD the step of.
- 3. method as claimed in claim 2, it is characterised in that after the determination is successfully recovered, this method also includes：If packet read-write operation is read operation, continue to read the packet of mark from SD；If packet read-write operation is write operation, continue to carry out data write-in to SD since the data of mark.
- 4. the method as described in claim 1,2 or 3, it is characterised in that the execution SD drivings initialization procedure includes：Initialize the SD modules in main frame；Initialization command is sent to SD, SD is initialized.
- 5. method as claimed in claim 4, it is characterised in that described to include to SD transmission combined informations：SD CMD pins are drawn high, at least 74 clock signals are sent to SD；Idle state command is sent to SD.
- 6. a kind of equipment that abnormal restoring is carried out to safe digital card, it is characterised in that the equipment includes abnormal determining module, group Close information transmission and initialization module and test determining module；The abnormal determining module, it is abnormal to determine that SD occurs, sent to the combined information and initialization module sends combination letter Breath sends instruction；The combined information is sent and initialization module, receives combined information and sends instruction, continues to send combined information, institute to SD Stating combined information includes clock signal and idle state command；It is determined that the time for sending combined information is more than setting time, perform SD drives initialization procedure, and test instruction is sent to the test determining module；The test determining module, receive from combined information transmission and the test of initialization module instruction, carried out to SD Readwrite tests, if receiving the response message from SD, it is determined that be successfully recovered.
- 7. equipment as claimed in claim 6, it is characterised in that the equipment also includes functional check module, and data are carried out to SD Bag read-write operation, the packet of read-write is verified, if there is mistake, the read-write for repeating error data bag to SD is grasped Make, it is determined that the packet of read-write still malfunctions, judge whether number of repetition is more than and repeat threshold value, if it is greater, then described in notice There is exception in abnormal determining module SD, and the packet of error is marked；If it is not greater, then number of repetition is tired out Add, return and perform the read-write operation for repeating error data bag to SD.
- 8. equipment as claimed in claim 7, it is characterised in that it is described test determining module after determining to be successfully recovered, Read-write, which is sent, to the functional check module recovers instruction；The functional check module, receive the read-write from the test determining module and recover instruction, if packet read-write behaviour As read operation, then continue to read the packet of mark from SD；If packet read-write operation is write operation, from the number of mark According to continuation is started data write-in is carried out to SD.
- 9. the equipment as described in claim 6,7 or 8, it is characterised in that the combined information is sent and initialization module includes Combined information sending submodule and initialization submodule,The combined information sending submodule, receive combined information and send instruction, continue to send combined information to SD, it is determined that sending The time of combined information is more than setting time, and reset indication is sent to the initialization submodule；The initialization submodule, the reset indication from the combined information sending submodule is received, initialized in main frame SD modules, and initialization command is sent to notify SD to be initialized to SD；Test instruction is sent to the test determining module.
- 10. equipment as claimed in claim 9, it is characterised in that the combined information sending submodule is sending combination to SD During information, SD CMD pins are drawn high, at least 74 clock signals, and send idle state command are sent to SD.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410130217.4A CN104699418B (en) | 2014-04-02 | 2014-04-02 | The method and apparatus of abnormal restoring is carried out to safe digital card |
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| CN201410130217.4A CN104699418B (en) | 2014-04-02 | 2014-04-02 | The method and apparatus of abnormal restoring is carried out to safe digital card |
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| CN104699418B true CN104699418B (en) | 2018-02-16 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109635016A (en) * | 2018-10-16 | 2019-04-16 | 深圳壹账通智能科技有限公司 | Data transfer device, device, equipment and computer readable storage medium |
| TWI776653B (en) * | 2021-08-24 | 2022-09-01 | 緯穎科技服務股份有限公司 | Control system and control method for controlling storage device |
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|---|---|---|---|---|
| CN1766912A (en) * | 2005-09-13 | 2006-05-03 | 北京中星微电子有限公司 | Process for initializing memory card |
| CN102103885A (en) * | 2009-12-21 | 2011-06-22 | 上海华虹集成电路有限责任公司 | Method for clearing busy state of secure digital memory card (SD card) and busy state clearing circuit |
| CN102142093A (en) * | 2011-03-24 | 2011-08-03 | 青岛海信移动通信技术股份有限公司 | Operation method and device for memory card |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100511162C (en) * | 2006-09-29 | 2009-07-08 | 华为技术有限公司 | Method, device and a single-board for isolating bus |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1766912A (en) * | 2005-09-13 | 2006-05-03 | 北京中星微电子有限公司 | Process for initializing memory card |
| CN102103885A (en) * | 2009-12-21 | 2011-06-22 | 上海华虹集成电路有限责任公司 | Method for clearing busy state of secure digital memory card (SD card) and busy state clearing circuit |
| CN102142093A (en) * | 2011-03-24 | 2011-08-03 | 青岛海信移动通信技术股份有限公司 | Operation method and device for memory card |
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