CN111428526B - A method for identifying a function card and a mobile device - Google Patents

Abstract

The application discloses a method for identifying a function card and mobile equipment, wherein the method for identifying the function card comprises the following steps: electrifying the functional card to be identified by adopting a first voltage; identifying whether the functional card is a first type memory card or a first type identity identification card; if not, adjusting the power supply voltage of the function card to a second voltage; identifying whether the functional card is a second type memory card or a second type identity identification card; wherein the second voltage is greater than the first voltage. By the mode, the condition that the function card is damaged due to overhigh voltage can be avoided, and the identification efficiency is improved.

Description

A method for identifying a function card and a mobile device

technical field

The present application relates to the technical field of card identification, and in particular, to a method for identifying a function card and a mobile device.

Background technique

Due to the characteristics of large storage capacity, convenient portability, and fast reading and writing speed, function cards such as memory cards and ID cards are supported by more and more terminal devices. At present, after inserting the function card, the terminal device loads the data of the function card through the identification program, so as to realize the identification of the function card.

Taking the EMMC card, SD card and SIM card as examples, when identifying the EMMC card and the SD card, the CMD8 command and the ACMD41 command are usually used to determine whether the SD card responds to identify the SD card. This method requires two steps to implement, the speed is slow, the recognition efficiency is low, and this method is not compatible with SIM cards.

SUMMARY OF THE INVENTION

The present application mainly provides a method for identifying a function card and a mobile device, which can solve the problems in the prior art that the identification rate of the function card is slow and incompatible with the SIM card.

An approach adopted in this application is to provide a method for identifying a function card, the function card includes a first type of memory card, a second type of memory card, a first type of identification card and a second type of identification card, the method includes : use the first voltage to power on the function card to be identified; identify whether the function card is the first type of memory card or the first type of identification card; if not, adjust the power supply voltage of the function card to the second voltage; identify the function Whether the card is a second type of memory card or a second type of identification card; wherein the second voltage is greater than the first voltage.

Wherein, the first type of memory card is an EMMC card, and the first type of identity card is a 1.8V SIM card; the step of identifying whether the function card is the first type of memory card or the first type of identity card includes: sending the EMMC to the function card The initialization command of the protocol; check whether the command pin of the function card has a response; if there is a response, the function card is identified as an EMMC card.

Among them, the initialization command of the EMMC protocol is the CMD1 command.

Wherein, the first type of memory card is an EMMC card, and the first type of identity card is a 1.8V SIM card; the step of identifying whether the function card is the first type of memory card or the first type of identity card includes: performing SIM on the function card Card reset operation; check whether the function card has a reset response; if there is a reset response, identify the function card as a 1.8V SIM card.

The second type of memory card is an SD card, and the second type of identity card is a 3V SIM card; the step of identifying whether the function card is the second type of memory card or the second type of identity card includes: sending an SD protocol to the function card The initialization command of the function card; check whether the command pin of the function card has a response; if there is a response, the function card is recognized as an SD card.

The initialization command of the SD protocol is a CMD8 command.

Wherein, the second type of memory card is an SD card, and the second type of identity card is a 3V SIM card; the step of identifying whether the function card is a second type of memory card or a second type of identity card includes: performing a SIM card on the function card Reset operation; check whether the function card has a reset response; if there is a reset response, identify the function card as a 3V SIM card.

Wherein, the first voltage is 1.8V, and the second voltage is 3V.

Wherein, before sending the initialization command of the EMMC protocol to the function card; and/or before sending the initialization command of the SD protocol to the function card, further comprising: sending the reset command shared by the EMMC protocol and the SD protocol to the function card, so that the function to be identified is The card goes into an idle state.

Wherein, the method further includes: powering off the function card, and re-powering on the function card at the first voltage or the second voltage according to the type of the function card, so as to operate the function card.

One approach adopted in the present application is to provide a mobile device, the mobile device includes a controller and a card slot, the card slot is used for accommodating a function card and making an electrical connection between the function card and the controller, and the controller is used for adopting the above method Identify the function card.

The method for identifying a function card provided by the present application includes: using a first voltage to power on the function card to be identified; identifying whether the function card is a first-type memory card or a first-type identification card; The power supply voltage is adjusted to a second voltage; whether the function card is a second-type memory card or a second-type identification card; wherein, the second voltage is greater than the first voltage. Through the above method, the identification process of two different voltages is carried out by using the working voltages of different types of function cards, which avoids the damage of function cards caused by excessive voltage, and can identify four different types of function cards, which improves the identification efficiency.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present application more clearly, the following briefly introduces the drawings that are used in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative effort. in:

1 is a schematic flowchart of a first embodiment of a method for identifying a function card provided by the present application;

2 is a schematic flowchart of a second embodiment of a method for identifying a function card provided by the present application;

3 is a schematic flowchart of a third embodiment of a method for identifying a function card provided by the present application;

4 is a schematic structural diagram of an embodiment of a mobile device provided by the present application;

FIG. 5 is a schematic structural diagram of a card tray in an embodiment of a mobile device provided by the present application.

Detailed ways

Reference herein to an "embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor a separate or alternative embodiment that is mutually exclusive of other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

The function card of the present invention refers to a card-type product that is used in electronic devices such as mobile phones, digital cameras, portable computers, tablets, and PDAs (Personal Digital Assistant, handheld computers), and can realize functions such as storage and communication. It may include MMC card, EMMC card, EMCP card, SD card, SIM card and the like.

Memory card is an independent storage medium used in mobile phones, digital cameras, portable computers, MP3 and other digital products. memory card", "memory card", etc. There are many types of memory cards, and the embodiments of this application mainly introduce the identification methods of SD cards and EMMC cards. The identification card is mainly used to identify the user's identity, such as a SIM card.

SD card (Secure Digital Memory Card) is a new generation memory device based on semiconductor flash memory, with high memory capacity, fast data transfer rate, great mobility and good security. SD cards generally include standard SD cards and Micro SD cards.

SIM card (Subscriber Identification Module), also known as user identification card, smart card, GSM digital mobile phone must be installed with this card before it can be used. SIM cards generally include standard SIM cards, Micro SIM cards and Nano SIM cards. Micro SIM cards, also known as 3FF SIM cards, are the third type of SIM, with a size of 12x15mm × 0.8mm, which is smaller than the second type of SIM used in our mobile phones. The card size of 15x25mm x 0.8mm is 52% smaller. Nano SIM card is a 4FF standard SIM card. The Nano SIM is one-third smaller than a Micro SIM, 60 percent smaller than a standard SIM, and 15 percent thinner. Its dimensions are 12.3mm×8.8mm×0.7mm.

EMMC (Embedded Multi Media Card) is a standard specification of embedded memory established by the MMC Association, mainly for products such as mobile phones or tablet computers. A clear advantage of EMMC is the integration of a controller in the package, which provides a standard interface and manages the flash memory, freeing handset makers to focus on other parts of product development and reducing time-to-market. These features are equally important to NAND suppliers looking to shrink lithography and reduce costs.

The SD card has a total of nine pins, which are divided into two operation modes, namely SD mode and SPI mode. Among them, this embodiment mainly operates in the SD mode, so the DAT3 pin of the SD card cannot be grounded to prevent it from switching to the SPI mode. Specifically, the DAT3 pin of the memory card to be recognized is powered on, so that the DAT3 pin is in a non-grounded state.

Among them, the pins of SD card are shown in the following table:

Among them, EMMC includes NAND flash, controller, standard package interface.

SIM cards generally have 8 pins, as shown in the following table:

pin number name Function 1 VCC power supply 2 RST reset 3 CLK clock 4 Not available 5 GND ground 6 VPP programming voltage 7 I/O data 8 Not available

Referring to FIG. 1, FIG. 1 is a schematic flowchart of a fifth embodiment of a method for identifying a function card provided by the present application. The method includes:

Step 11: Use the first voltage to power on the function card to be identified.

It is understandable that different types of memory cards or identification cards may have different working voltages. During identification, if the voltage is too low, some function cards may not be driven for identification, and if the voltage is too high, some function cards may be burned out.

Optionally, in an embodiment, the working voltage of the EMMC card is 3V, but the EMMC card can be identified at both 1.8V and 3V; the SIM card includes two types, and the working voltage of the 1.8V SIM card is 1.8V V, 3V The working voltage of the SIM card is 3V, and the working voltage of the SD card is 3V. Therefore, in step 11, the function card to be identified is powered on with a voltage of 1.8V.

Step 12: Identify whether the function card is the first type of memory card or the first type of identification card.

Here, the EMMC card and the SIM card are used as examples for illustration.

Optionally, the identification method of the EMMC card or the identification method of the SIM card can be respectively adopted, for example, it is first detected whether the function card to be identified is an EMMC card, and if not, it is then detected whether it is a SIM card. Or, firstly detect whether the function card to be identified is a SIM card, if not, then detect whether it is an EMMC card.

Since the EMMC card also adopts the EMMC protocol, whether the function card is an EMMC card can be identified by the following methods: send the initialization command of the EMMC protocol to the function card; check whether the command pin of the function card has a response; if the response is stored, then Identify the feature card as an EMMC card. Specifically, the initialization command of the EMMC protocol is the CMD1 command.

Optionally, when identifying the EMMC protocol, before sending the CMD1 command, a reset command of the EMMC protocol may also be sent to the function card, so that the function card to be identified enters an idle state. Specifically, the reset command of the EMMC protocol is CMD0.

The identification of the SIM card can be carried out in the following ways: perform the SIM card reset operation on the function card; detect whether the function card has a reset response; if there is a reset response, identify the function card as a 1.8V SIM card. Specifically, the SIM card reset operation includes cold reset and warm reset.

Cold reset: Initially, all pins are in low potential (L state), the voltage range is 0-0.4V, the VCC pin is powered on first, and then the VPP programming voltage is provided (in the smart SIM card, VPP is useless); After the voltage of the VCC pin is stable for a period of time, set the I/O pin to the receiving mode (H state) and provide a stable CLK clock signal. The RST pin needs to maintain the L state for 400 clock cycles after the CLK signal is supplied again. , then can be set to H state, within 400-4000 clock cycles after the RST pin reset signal is provided, the detection I/O pin has a reset response.

Warm reset: warm reset is used in the case of cold reset failure. During the process, VCC is kept in H state and there is a stable CLK clock signal; during warm reset, the RST pin needs to be kept in L state for at least 400 clock cycles ; Within 200 clock cycles before or after the RST pin is set to the L state, the I/O pin should be set to receive mode; 400-4000 clock cycles after the RST pin is set to the H state, detect the I/O pin There is an answer to reset.

When the judgment result in step 12 is yes, the function card is identified as an EMMC card or a 1.8V SIM card. When the judgment result of step 12 is NO, step 13 is executed.

Step 13: Adjust the power supply voltage of the function card to the second voltage.

Wherein, the second voltage is 3V.

Step 14: Identify whether the function card is the second type of memory card or the second type of identification card.

Here is an example of an SD card and a SIM card.

Here, the identification method of the SIM card or the identification method of the SD card can be respectively adopted, for example, it is first detected whether the function card to be identified is a SIM card, and if not, then whether it is an SD card is detected. Or, first detect whether the function card to be identified is an SD card, and if not, then detect whether it is a SIM card.

The identification of the SIM card can refer to the method in the above-mentioned step 12, specifically: performing a SIM card reset operation on the function card; detecting whether the function card has a reset response; if there is a reset response, identifying the function card as a 3V SIM card.

The identification method of the SD card can be as follows: send the initialization command of the SD protocol to the function card; detect whether the command pin of the function card has a response; if there is a response, then identify the function card as an SD card. Specifically, it may be to send the CMD8 and ACMD41 commands to identify the SD card in two steps, which will not be repeated here.

Optionally, when identifying the SD protocol, before sending the CMD8 and ACMD41 commands, a reset command of the SD protocol may also be sent to the function card, so that the function card to be identified enters an idle state. Specifically, the reset command of the SD protocol is CMD0.

In addition, after step 14, it may further include: powering off the function card, and re-powering on the function card at the first voltage or the second voltage according to the type of the function card, so as to operate the function card. The secondary power-on here can be determined according to the judgment result in the above steps, and it can be 1.8V or 3V specifically. For example, in the above identification process, the function card to be identified is identified as a 1.8V SIM card, then the secondary power-on can use 1.8V voltage, if the above identification process, the function card to be identified is identified as a 3V SIM card, EMMC card or SD card, then the secondary power-on can use 3V voltage. Using the above method, after the function card type is identified, the function card is powered off and restarted to eliminate the unknown impact of the first power-on on the card, and then according to the identified card type, the corresponding power supply requirements are provided. Perform normal initialization operations on the corresponding cards. In addition, since the working voltage of the EMMC card is 3V, when the EMMC card is identified by the 1.8V voltage, it needs to be powered off and restarted, and the EMMC card needs to be powered on and restarted twice with 3V to make it work.

Referring to FIG. 2, FIG. 2 is a schematic flowchart of a second embodiment of a method for identifying a function card provided by the present application. The method includes:

Step 201: Power on the function card to be identified by using the first voltage.

Step 202: Send an initialization command of the EMMC protocol to the function card.

Among them, the initialization command of the EMMC protocol is CMD1.

Step 203: Detect whether the command pin of the function card has a response.

If there is a response, go to step 204; if there is no response, go to step 205.

Step 204: Identify the function card as an EMMC card.

Step 205: Perform SIM card reset operation on the function card.

Step 206: Detect whether the function card has a reset response.

If there is an answer to reset, go to step 207 , if there is no answer to reset, go to step 208 .

Step 207: Identify the function card as a 1.8V SIM card.

Step 208: Adjust the power supply voltage of the function card to the second voltage.

Step 209 : perform a SIM card reset operation on the function card.

Step 210: Detect whether the function card has a reset response.

If there is an answer to reset, go to step 211 , if there is no answer to reset, go to step 212 .

Step 211: Identify the function card as a 3V SIM card.

Step 212: Send an initialization command of the SD protocol to the function card.

Among them, the initialization command of the SD protocol is CMD8.

Step 213: Detect whether the command pin of the function card has a response.

If there is a response, step 214 is performed.

Step 214: Identify the function card as an SD card.

Referring to FIG. 3, FIG. 3 is a schematic flowchart of a third embodiment of a method for identifying a function card provided by the present application. The method includes:

Step 301: Power on the function card to be identified by using the first voltage.

Step 302: Perform SIM card reset operation on the function card.

Step 303: Detect whether the function card has a reset response.

If there is an answer to reset, go to step 304 , if there is no answer to reset, go to step 305 .

Step 304: Identify the function card as a 1.8V SIM card.

Step 305: Send an initialization command of the EMMC protocol to the function card.

Among them, the initialization command of the EMMC protocol is CMD1.

Step 306: Detect whether the command pin of the function card has a response.

If there is a response, go to step 307, if there is no response, go to step 308.

Step 307: Identify the function card as an EMMC card.

Step 308: Adjust the power supply voltage of the function card to the second voltage.

Step 309: Send an initialization command of the SD protocol to the function card.

Among them, the initialization command of the SD protocol is CMD8.

Step 310: Detect whether the command pin of the function card has a response.

If there is a response, step 311 is performed, and if there is no response, step 312 is performed.

Step 311: Identify the function card as an SD card.

Step 312: Perform SIM card reset operation on the function card.

Step 313: Detect whether the function card has a reset response.

If there is an answer to reset, step 314 is performed.

Step 314: Identify the function card as a 3V SIM card.

The method for identifying a function card provided by this embodiment includes: using a first voltage to power on the function card to be identified; identifying whether the function card is a first-type memory card or a first-type identification card; The power supply voltage of the device is adjusted to the second voltage; whether the function card is a second-type memory card or a second-type identification card; wherein, the second voltage is greater than the first voltage. Through the above method, the identification process of two different voltages is carried out by using the working voltages of different types of function cards, which avoids the damage of function cards caused by excessive voltage, and can identify four different types of function cards, which improves the identification efficiency.

Referring to FIG. 4, FIG. 4 is a schematic structural diagram of an embodiment of a mobile device provided by the present application. The mobile device 40 includes a controller 41 and a card tray 42 that can be embedded in the main body of the mobile device 40. The card tray 42 is provided with a card slot 42a, The card slot 42a is used for accommodating the function card and forming an electrical connection between the function card and the controller 41, and the controller 41 is used for identifying different types of function cards in the above-mentioned manner.

Among them, as shown in FIG. 5, FIG. 5 is a schematic structural diagram of a card tray in an embodiment of the mobile device provided by the present application. The card tray 42 includes a first card slot 42a and a second card slot 42b. The first card slot 42a and The shape of the second card slot 42b is the same, wherein the first card slot 42a and the second card slot 42b are used for accommodating various types of function cards provided in the above embodiments.

The mobile device may be a wearable device such as a mobile phone, a tablet computer, and a smart watch.

In addition, the mobile device may further include a memory for storing program data, and when the program data is executed by the controller 41, the above-mentioned identification method is implemented.

When the embodiments of the present application are implemented in the form of software functional units and are sold or used as independent products, they may be stored in a computer-readable storage medium. Based on this understanding, the technical solutions of the present application can be embodied in the form of software products in essence, or the parts that contribute to the prior art, or all or part of the technical solutions, and the computer software products are stored in a storage medium , including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor to execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage medium includes: U disk, removable hard disk, Read-Only Memory (ROM, Read-Only Memory), Random Access Memory (RAM, Random Access Memory), magnetic disk or optical disk and other media that can store program codes .

The above description is only an embodiment of the present application, and is not intended to limit the scope of the patent of the present application. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present application, or directly or indirectly applied to other related technologies Fields are similarly included within the scope of patent protection of this application.

Claims (10)

1. the identification method of a function card, is characterized in that, described function card comprises any one in EMMC card, SD card, first class SIM card and second class SIM card, and described method comprises: Power on the function card to be identified by using the first voltage; Identify whether the function card is an EMMC card or a first-class SIM card; If not, adjusting the power supply voltage of the function card to a second voltage; Identify whether the function card is an SD card or a second-class SIM card; Power off the function card, and power on the function card twice under the corresponding working voltage according to the type of the function card, so as to operate the function card; Wherein, the second voltage is greater than the first voltage, and the working voltage of the second type of SIM card is greater than the working voltage of the first type of SIM card. 2. The method according to claim 1, wherein The first type of SIM card is a 1.8V SIM card; The step of identifying whether the function card is an EMMC card or a first-class SIM card includes: Send the initialization command of the EMMC protocol to the function card; Detect whether the command pin of the function card has a response; If there is a response, the function card is identified as an EMMC card. 3. The method of claim 2, wherein The initialization command of the EMMC protocol is the CMD1 command. 4. The method of claim 1, wherein The first type of SIM card is a 1.8V SIM card; The step of identifying whether the function card is an EMMC card or a first-class SIM card includes: performing SIM card reset operation on the function card; Detecting whether the function card has a reset response; If there is an answer to reset, the function card is identified as a 1.8V SIM card. 5. The method of claim 1, wherein The second type of SIM card is a 3V SIM card; The step of identifying whether the function card is an SD card or a second type of SIM card includes: Send an initialization command of the SD protocol to the function card; Detect whether the command pin of the function card has a response; If there is a response, the function card is identified as an SD card. 6. The method of claim 5, wherein The initialization command of the SD protocol is a CMD8 command. 7. The method of claim 1, wherein, The second type of SIM card is a 3V SIM card; The step of identifying whether the function card is an SD card or a second type of SIM card includes: performing SIM card reset operation on the function card; Detecting whether the function card has a reset response; If there is an answer to reset, the function card is identified as a 3V SIM card. 8. The method of claim 1, wherein: The first voltage is 1.8V, and the second voltage is 3V. 9. The method according to claim 2 or 5, characterized in that, Before the initialization command of the EMMC protocol is sent to the function card; and/or before the initialization command of the SD protocol is sent to the function card, further comprising: A reset command shared by the EMMC protocol and the SD protocol is sent to the function card, so that the function card to be identified enters an idle state. 10. A mobile device, characterized in that the mobile device comprises a controller and a card tray that can be embedded in the main body of the mobile device, the card tray is provided with a card slot, and the card slot is used for accommodating a function card The function card is electrically connected to the controller, and the controller is configured to identify the function card by using the method according to any one of claims 1-9.

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