CN105590075A - Method for rapidly getting access to SD card and intelligent terminal - Google Patents
Method for rapidly getting access to SD card and intelligent terminal Download PDFInfo
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- CN105590075A CN105590075A CN201510962787.4A CN201510962787A CN105590075A CN 105590075 A CN105590075 A CN 105590075A CN 201510962787 A CN201510962787 A CN 201510962787A CN 105590075 A CN105590075 A CN 105590075A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/0013—Methods or arrangements for sensing record carriers, e.g. for reading patterns by galvanic contacts, e.g. card connectors for ISO-7816 compliant smart cards or memory cards, e.g. SD card readers
- G06K7/0021—Methods or arrangements for sensing record carriers, e.g. for reading patterns by galvanic contacts, e.g. card connectors for ISO-7816 compliant smart cards or memory cards, e.g. SD card readers for reading/sensing record carriers having surface contacts
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Abstract
The invention discloses a method for rapidly getting access to a SD card and an intelligent terminal. The intelligent terminal comprises a controller and a card slot in which the SD card is installed. The controller comprises a serial peripheral interface (SPI), and reads the characteristic data of the SD card via the SPI. The SPI is used for having access to at least one of the OCR (optical character recognition) register, a platform version CIS register, a CSD (control system design) register, and a file type SCR register of the SD card. The method may rapidly acquire the characteristic data of the SD card, and provides a technical support for the user to acquire the OCR, the platform version CIS, the CSD and the file type SCR.
Description
Technical field
The present invention relates to SD card technique field, particularly relate to a kind of side of fast access SD cardMethod and intelligent terminal.
Background technology
Along with the develop rapidly of the communication technology and popularizing of smart electronics product, more and more moveTerminal or mobile device become an indispensable part in people's life, as smart mobile phone. AndWhen intelligent terminal is universal, the kind of the function that user possesses intelligent terminal and performance are wantedAsk also more and more higher, therefore, the demand of the memory space to mobile communication equipment is increasing, andThe internal memory of traditional mobile device itself can not meet user's daily demand, normally passes throughExterior storage SD card is expanded the application memory of mobile device or terminal.
The existing access mode to SD card has a lot, as the mode by driver is pacifiedFull access, by the ordinary file read-write interface access of SD card, be any access all onlyCan be the data message that obtains SD card storage itself, and can not obtain the data letter of SD card itselfBreath.
Summary of the invention
The technical problem that the present invention mainly solves be to provide a kind of fast access SD card method andIntelligent terminal, characteristic that can quick obtaining SD card itself.
For solving the problems of the technologies described above, the technical scheme that the present invention adopts is: provide a kind of fastThe intelligent terminal of speed access SD card, described intelligent terminal comprises controller and for SD is installedThe draw-in groove of card, described controller comprises serial peripheral equipment interface SPI interface, described controller passes through instituteState the characteristic that SPI interface reads described SD card; Wherein, described SPI interface is for accessThe optical character identification OCR register of described SD card, platform release CID register, controlAt least one in system CSD register and file type SCR register.
Wherein, described SPI interface comprises that control line, DOL Data Output Line, Data In-Line are with in timeClock holding wire, described controller is set up by described control line output enable signal and described SD cardCommunication connection, by described DOL Data Output Line and described clock cable output control instruction with initiallyChange described SD card, and it is initial to receive the response of described SD card by described Data In-LineChange information time read the characteristic of described SD card.
Wherein, described intelligent terminal also comprises the power circuit, the reset electricity that are connected with described controllerRoad, crystal oscillating circuit, interrupt circuit, universal asynchronous receiving-transmitting transmitter UART circuit.
Wherein, described power circuit is connected to described controller by a switch.
Wherein, described intelligent terminal also comprises universal input/output GPIO interface.
Wherein, the characteristic of described SD card comprises operating voltage, producer's letter of described SD cardAt least one in breath, read-write speed and transfer rate grade.
For solving the problems of the technologies described above, another technical solution used in the present invention is: provide a kind ofThe method of fast access SD card, comprising:
Controller initializes its SPI interface;
By described SPI interface to being fixed on described in SD card in its SD card draw-in groove sends and readThe instruction of the characteristic of SD card; Wherein, described characteristic is stored in the optics of described SD cardCharacter recognition OCR register, platform release CID register, Control System Design CSD depositIn at least one register in device and file type SCR register;
The described characteristic that described in reception buffer memory, SD card returns.
After the step of the described characteristic that wherein, described in described reception buffer memory, SD card returnsAlso comprise:
Described controller is printed described characteristic by universal asynchronous receiving-transmitting transmitter UART circuitAccording to.
Wherein, described controller carries out initialized step to its SPI interface and specifically comprises:
Described controller is exported control instruction to institute by DOL Data Output Line and the clock cable of SPIStating SD card initializes.
For solving the problems of the technologies described above, the characteristic of SD card of the present invention comprises described SDAt least one in operating voltage, producer's information, read-write speed and the transfer rate grade of card.
The invention has the beneficial effects as follows: be different from the situation of prior art, fast access of the present inventionThe intelligent terminal of SD card, comprises controller and for the draw-in groove of SD card is installed, controller comprisesSerial peripheral equipment interface SPI interface, controller reads the feature of described SD card by this SPI interfaceData. Not only supplement the blank of prior art to the data access of SD card own, and, obtainTo SD card characteristic also for user obtain SD card optical character identification OCR memory,Platform release CID register, Control System Design CSD register and file type SCR postThe data of storing in storage provide technical support. Can also determine SD card according to this characteristicThe problem such as incompatible, for user brings convenience.
Brief description of the drawings
Fig. 1 is the structural representation of intelligent terminal one embodiment of fast access SD card of the present invention;
Fig. 2 is the structural representation of another embodiment of intelligent terminal of fast access SD card of the present inventionFigure;
Fig. 3 is the structural representation of an embodiment again of the intelligent terminal of fast access SD card of the present inventionFigure;
Fig. 4 is the schematic flow sheet of method one embodiment of fast access SD card of the present invention.
Detailed description of the invention
Consult Fig. 1, Fig. 1 is intelligent terminal one embodiment of fast access SD card of the present inventionStructural representation. As shown in Figure 1, the intelligent terminal of the access SD card of present embodiment comprises controlDevice 101 processed and for the draw-in groove 102 of SD card is installed, controller 101 comprises that serial peripheral connectsMouth SPI interface 1011, controller 101 is read and is fixed on draw-in groove 102 by SPI interface 1011In the characteristic of SD card. Wherein, described characteristic is stored in the optics of described SD cardCharacter recognition OCR register, platform release CID register, Control System Design CSD depositIn at least one memory in device and file type SCR register. For example, the work of SD cardDo in store voltages and OCR register; Producer's information is stored in CID register; Transfer rateBe stored in CSD register medium. Therefore, this controller 101 is accessed by SPI interface 1011The optical character identification OCR register of this SD card, platform release CID register, control systemAt least one in system design CSD register and file type SCR register, can obtainTo at least one characteristic of this SD card.
Wherein, above-mentioned SPI interface 1011 comprise control line 10111, DOL Data Output Line 10112,Data In-Line 10113 and clock cable 10114, described controller 101 passes through control line10111 establish a communications link with SD card, for controller 101 and SD card provide enable signal, timeClock holding wire 10114 provides clock signal for controller 101, by clock cable 10114 HesDOL Data Output Line 10112 is exported control instruction to initialize SD card to be visited, and by this letterNumber input line 10113 receives the SD card that sends after the initialized information of response of these SD cardsCharacteristic.
Above-mentioned characteristic comprises operating voltage, producer's information, read-write speed and the biography of SD cardAt least one in defeated speed grade.
Wherein, this SD card itself has SPI interface, and supports the finger of SD card 2.0 or SD3.0Make form and response format.
Particularly, after SD card to be visited is fixed in draw-in groove 102, controller 101First the current potential of control line 10111 is dragged down, establish a communications link with SD card. DOL Data Output Line 10112Send the control instruction that initializes this SD card, SD clamping to SD card with clock cable 10114Receive after this instruction, by signal input line 10113 and clock cable 10114 to controller 101Send response signal. After initialization completes, controller 101 is again by DOL Data Output Line 10112Send and obtain the control instruction of characteristic to SD card, one preferred embodiment in, shouldControl instruction comprises the type of characteristic, as operating voltage, producer's information, read-write speed withAnd one or more in transfer rate grade, this SD clamping is received after above-mentioned control instruction, logicalCross Data In-Line 10113 and will be sent to controller 101 with control instruction characteristic of correspondence data.
In an embodiment therein, this controller 101 is STC12LE5A32S2 monolithicMachine, this single-chip microcomputer itself has SPI interface, without extending out, can realize in present embodimentObtaining of SD characteristic. Before obtaining SD card characteristic, only need to be to SPI interface1011 initialize, and then controller instruction to be sent are written to the buffer memory of controller 101In, be also saved in buffer memory receiving the data that SD card returns, convenient and swift.
In another embodiment, as shown in Figure 2, the intelligent terminal of this fast access SD cardExcept comprising controller 201, draw-in groove 202 for fixing SD card, this intelligent terminal alsoComprise power circuit 203, one preferred embodiment in, this power circuit 203 is by oneSwitch 204 is connected with controller 201, not only convenient in use, and to intelligent terminalItself also plays a protective role. In addition, this intelligent terminal also comprises reset circuit 205, middle power-offRoad 206, crystal oscillating circuit 207 and universal asynchronous receiving-transmitting transmitter UART circuit 208.
Wherein, this power circuit 203 provides stable operating voltage for intelligent terminal and SD card.This crystal oscillating circuit 207 provides corresponding clock signal for this controller 201. This reset circuit 205For controller 201 provides reset signal, this controller 201 is reset to specific processing stageCorresponding default conditions with it. Generally, power circuit 203 and crystal oscillating circuit 207 standardsAfter standby ready, controller 201 just can start, and SPI interface 2011 and universal asynchronous receiving-transmitting are passedDefeated device UART circuit 208 initializes. This universal asynchronous receiving-transmitting transmitter UART circuit208 are connected with extraneous computer UART circuit 400 in the time of work, comprise that signal sends line and letterNumber receive line, signal sends line and receives the data message that sends of controller 201, and signal sends line willThis data message is sent to computer UART circuit 400. This computer UART circuit 400 will receiveTo the characteristic of SD card print, make that user can the open-and-shut SD of finding out cardCharacteristic information.
In addition, this universal asynchronous receiving-transmitting transmitter UART circuit 208 is also for downloading to programIn this controller 201.
In another embodiment, as shown in Figure 3, the intelligent terminal of this fast access SD cardAlso comprise universal input/output GPIO interface 309, to expand the interface that extends out of this intelligent terminal,This is not limiting again.
Be different from prior art, the intelligent terminal of the fast access SD card in present embodiment, bagDraw together controller and for the draw-in groove of SD card is installed, controller comprises that serial peripheral equipment interface SPI connectsMouthful, controller reads the characteristic of described SD card by this SPI interface. Not only supplement existingThere is the blank of technology to the data access of SD card own, and, the characteristic of the SD card gettingPost according to the optical character identification OCR register, the platform release CID that also obtain SD card for userThe data of storage, Control System Design CSD register and file type SCR register-storedTechnical support is provided. Can also determine the problems such as SD card is incompatible according to this characteristic, forUser brings convenience.
Consult Fig. 4, Fig. 4 is the flow process of method one embodiment of fast access SD card of the present inventionSchematic diagram. As shown in Figure 4, the method for present embodiment comprises the steps:
401: controller initializes its SPI interface.
Wherein, this SPI interface comprises control line, DOL Data Output Line, Data In-Line and clockHolding wire, described controller is by control line and the to be visited intelligence that is fixed on access SD cardThe SD card of draw-in groove that can terminal establishes a communications link, for controller and SD card provide enable signal,Clock cable provides clock signal for controller, by clock cable and DOL Data Output Line outputControl instruction to be to initialize SD card to be visited, and receives the sound of this card by this signal input lineAnswer the characteristic of the SD card sending after initialized information.
Particularly, the power circuit of stable voltage is being provided for this controller and is carrying for controllerAfter ready for the crystal oscillating circuit of clock, controller enters duty. At SD to be visitedAfter card is installed and fixed, controller first drags down the current potential of control line, sets up communication link with SD cardConnect. DOL Data Output Line and clock signal alignment SD card send the control instruction that initializes this SD card,SD clamping is received after this instruction, by signal input line and clock cable, controller is sent to soundInduction signal, completes this SD card and SPI interface is initialized.
In other embodiments, this controller is STC12LE5A32S2 single-chip microcomputer, this monolithicMachine itself has SPI interface, without extending out, can realize the SD characteristic in present embodimentAccording to obtain. Before obtaining SD card characteristic, only need to initialize SPI interface,Then controller instruction to be sent is written in the buffer memory of controller, returns receiving SD cardThe data of returning are also saved in buffer memory, convenient and swift.
In another embodiment, controller also needs other of intelligent terminal to access SD cardExtending out interface initializes. As interrupt circuit interface, at when work and extraneous computerAsynchronous receiving-transmitting transmitter UART circuit and universal input/output GPIO that UART circuit connectsInterface etc.
402: read to the SD card transmission being fixed in its SD card draw-in groove by described SPI interfaceThe instruction of the characteristic of described SD card.
Wherein, above-mentioned characteristic comprises operating voltage, producer's information, the read-write speed of SD cardAnd at least one in transfer rate grade. Wherein, described characteristic is stored in described SDOptical character identification OCR register, platform release CID register, the Control System Design of cardIn at least one register in CSD register and file type SCR register. For example,In the operating voltage storage and OCR register of SD card; Producer's information is stored in CID register;It is medium that transfer rate is stored in CSD register. Therefore, this controller should by SPI interface accessingThe optical character identification OCR register of SD card, platform release CID register, control system are establishedAt least one in meter CSD register and file type SCR register, can get thisAt least one characteristic of SD card.
Particularly, complete after initialization at SD card and SPI interface, controller is defeated by data againOutlet sends and obtains the control instruction of characteristic to SD card, one preferred embodiment in,This control instruction comprises the type of characteristic, as operating voltage, producer's information, read-write speedAnd one or more in transfer rate grade. Accordingly, above-mentioned control is received in SD clampingInstruction.
403: the described characteristic that described in reception buffer memory, SD card returns.
SD clamping is received after the control instruction of obtaining its characteristic of controller transmission, according to controlThe type of the characteristic that instruction processed comprises, by corresponding special medical treatment data, as operating voltage, transmissionThe signals such as speed grade are sent to controller by the Data In-Line of the SPI interface of controller. ControlDevice processed receives this characteristic, and this characteristic is kept in buffer memory.
In another embodiment, controller receives after the characteristic of SD card, by withThe universal asynchronous receiving-transmitting transmitter UART circuit of connection be sent to extraneous computer UART electricityRoad, prints the characteristic of the SD card receiving, and user can open-and-shutly be seenGo out the characteristic information of SD card.
Be different from prior art, the controller in present embodiment first carries out initially its SPI interfaceChange, by described SPI interface to being fixed on described in SD card in its SD card draw-in groove sends and readThe instruction of the characteristic of SD card, in the time that SD card returns to this characteristic, receive and buffer memory described inThe described characteristic that SD card returns. Not only supplement prior art to the data access of SD card ownBlank, and the characteristic of the SD card getting is also obtained the optics of SD card for userCharacter recognition OCR register, platform release CID register, Control System Design CSD depositDevice and file type SCR register provide technical support. Can also be true according to this characteristicDetermine the problems such as SD card is incompatible, for user brings convenience.
The foregoing is only embodiments of the present invention, not thereby limit patent model of the present inventionEnclose every equivalent structure or change of equivalent flow process that utilizes description of the present invention and accompanying drawing content to doChange, or be directly or indirectly used in other relevant technical fields, be all in like manner included in of the present inventionIn scope of patent protection.
Claims (10)
1. an intelligent terminal for fast access SD card, is characterized in that, described intelligent terminal comprisesController and for the draw-in groove of SD card is installed, described controller comprises serial peripheral equipment interface SPIInterface;
Described controller reads the characteristic of described SD card by described SPI interface; Wherein,Described SPI interface is for accessing optical character identification OCR register, the platform version of described SD cardIn this CID register, Control System Design CSD register and file type SCR registerAt least one.
2. intelligent terminal according to claim 1, is characterized in that, described SPI interface bagDraw together control line, DOL Data Output Line, Data In-Line and clock cable;
Described controller is set up communication link by described control line output enable signal and described SD cardConnect, by described DOL Data Output Line and described clock cable output control instruction with described in initializingSD card, and receive the initialized information of response of described SD card by described Data In-LineTime read the characteristic of described SD card.
3. intelligent terminal according to claim 1, is characterized in that, described intelligent terminal alsoComprise the power circuit that is connected with described controller, crystal oscillating circuit, reset circuit, interrupt circuit,Universal asynchronous receiving-transmitting transmitter UART circuit.
4. intelligent terminal according to claim 2, is characterized in that, described power circuit is logicalCross a switch and be connected to described controller.
5. intelligent terminal according to claim 1, is characterized in that, described intelligent terminal alsoComprise universal input/output GPIO interface.
6. intelligent terminal according to claim 1, is characterized in that, the feature of described SD cardData comprise operating voltage, producer's information, read-write speed and the transfer rate etc. of described SD cardAt least one in level.
7. a method for fast access SD card, is characterized in that, comprising:
Controller initializes its SPI interface;
By described SPI interface to being fixed on described in SD card in its SD card draw-in groove sends and readThe instruction of the characteristic of SD card; Wherein, described characteristic is stored in the optics of described SD cardCharacter recognition OCR register, platform release CID register, Control System Design CSD depositIn at least one register in device and file type SCR register;
The described characteristic that described in reception buffer memory, SD card returns.
8. method according to claim 7, is characterized in that, described in described reception buffer memoryAfter the step of the described characteristic that SD card returns, also comprise:
Described controller is printed described characteristic by universal asynchronous receiving-transmitting transmitter UART circuitAccording to.
9. method according to claim 7, is characterized in that, described controller is to its SPIInterface carries out initialized step and specifically comprises:
Described controller is exported control instruction to institute by DOL Data Output Line and the clock cable of SPIStating SD card initializes.
10. according to the method described in claim 7～9, it is characterized in that the feature of described SD cardData comprise operating voltage, producer's information, read-write speed and the transfer rate etc. of described SD cardAt least one in level.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510962787.4A CN105590075A (en) | 2015-12-17 | 2015-12-17 | Method for rapidly getting access to SD card and intelligent terminal |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510962787.4A CN105590075A (en) | 2015-12-17 | 2015-12-17 | Method for rapidly getting access to SD card and intelligent terminal |
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| CN105590075A true CN105590075A (en) | 2016-05-18 |
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| CN201510962787.4A Pending CN105590075A (en) | 2015-12-17 | 2015-12-17 | Method for rapidly getting access to SD card and intelligent terminal |
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| CN107145308A (en) * | 2017-05-04 | 2017-09-08 | 惠州Tcl移动通信有限公司 | Mobile terminal and its SD card method of controlling operation thereof, system, storage device |
| CN109240947A (en) * | 2018-08-13 | 2019-01-18 | 武汉普利商用机器有限公司 | Intelligent card data method of reseptance and device |
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| CN107145308A (en) * | 2017-05-04 | 2017-09-08 | 惠州Tcl移动通信有限公司 | Mobile terminal and its SD card method of controlling operation thereof, system, storage device |
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| CN109240947A (en) * | 2018-08-13 | 2019-01-18 | 武汉普利商用机器有限公司 | Intelligent card data method of reseptance and device |
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Application publication date: 20160518 |