CN106412152B - A kind of SIM card detection method and mobile terminal based on mobile terminal - Google Patents
A kind of SIM card detection method and mobile terminal based on mobile terminal Download PDFInfo
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- CN106412152B CN106412152B CN201610400950.2A CN201610400950A CN106412152B CN 106412152 B CN106412152 B CN 106412152B CN 201610400950 A CN201610400950 A CN 201610400950A CN 106412152 B CN106412152 B CN 106412152B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
- H04M1/026—Details of the structure or mounting of specific components
- H04M1/0277—Details of the structure or mounting of specific components for a printed circuit board assembly
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/3816—Mechanical arrangements for accommodating identification devices, e.g. cards or chips; with connectors for programming identification devices
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/24—Arrangements for testing
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- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Telephone Function (AREA)
Abstract
The invention discloses a kind of SIM card detection method and mobile terminal based on mobile terminal, the mobile terminal includes: sequentially connected card interface, detection circuit, central processing unit, the central processing unit is connect by GPIO foot with the detection circuit, for after mobile terminal-opening, when there is card insertion to enter deck, each pin of card interface is in contact with each pin of SIM card respectively；Resistance between SIM card VDD pin and VSS foot is less than first resistor, is low level at VDD；GPIO is detected as low level interruption, then judgement detects that SIM card is inserted into；Control switch closure is SIM card power supply by feeder ear VLDO simultaneously.The purpose of SIM card can be replaced in the case where not influencing to realize mobile terminal-opening state in the prior art using the present invention, while the metal clips on deck in the prior art for SIM card detection can be removed, achieve the purpose that reduce deck volume.
Description
Technical field
The present invention relates to field of mobile terminals more particularly to a kind of SIM card detection method based on mobile terminal and
Mobile terminal.
Background technique
In the prior art, it has been able to achieve the detection under mobile terminal-opening state to SIM card insertion, to use
Exempt to change the worry that SIM card needs to shut down every time in family.In the prior art, inspection is inserted into for the SIM card under mobile terminal-opening state
Survey, which is adopted, uses following scheme:
Need additionally to increase in SIM card holder the interruption detection that a GPIO pin is inserted into for realizing SIM card；Therefore,
Interruption detection of the pin for SIM card insertion is also needed on deck other than the pin of SIM card function itself.Such as Fig. 1
It is shown, the schematic diagram of deck, the GPIO pin when being not inserted into SIM card in deck are inserted into for most common SIM card in the prior art
It meets a resistance Rp and is pulled to VLDO；When being not inserted into SIM card in deck, metal clips is pulled to VLDO, is high level；When
After SIM card is inserted into deck, metal clips is in contact with deck, and deck wall is ground connection, is low electricity at metal clips therefore
It is flat；Therefore, central processing unit only need to be which kind of level can judge whether SIM card is inserted into deck according to metal clips.
Drawback of the prior art is that detection SIM card insertion metal clips be located in deck, cause deck volume compared with
Greatly.In addition, inevitably elasticity changes metal clips after a number of uses, the detection of SIM card insertion is influenced.
Therefore, the existing technology needs to be improved and developed.
Summary of the invention
The technical problem to be solved in the present invention is that in view of the above drawbacks of the prior art, providing a kind of based on mobile whole
The SIM card detection method and mobile terminal at end can not influence to realize that mobile terminal is opened in the prior art by this method
The purpose of SIM card is replaced under machine state, while can remove the metal clips on deck in the prior art for SIM card detection,
Achieve the purpose that reduce deck volume.
The technical proposal for solving the technical problem of the invention is as follows:
A kind of mobile terminal, wherein include: sequentially connected card interface, detection circuit, central processing unit；
The card interface is provided with deck, for connecting each pin of SIM card, is provided with VDD in the card interface and draws
Foot and VSS pin, the VDD pin are used to power to SIM card, and the VSS pin is grounded for SIM card；
Detection circuit is connected with VDD, VSS foot of card interface；Include: inside the detection circuit feeder ear VLDO,
One switch and a first resistor and a ground terminal, the switch is in parallel with the first resistor, and the feeder ear VLDO passes through institute
It states switch and first resistor in parallel, be connected to the VDD pin, the ground terminal is connect with the VSS pin；
The central processing unit is connect by GPIO foot with the detection circuit, for controlling after mobile terminal-opening
The switch disconnects, and when SIM card is not inserted into the deck of card interface, each foot of card interface is hanging, and the VDD pin of card interface passes through the
One resistance is connected with feeder ear VLDO, and VDD is pulled to high level；Be also used to when there is card insertion to enter deck, card interface it is each
Pin is in contact with each pin of SIM card respectively；Resistance between SIM card VDD pin and VSS foot is less than first resistor, VDD
Place is low level；GPIO is detected as low level interruption, then judgement detects that SIM card is inserted into；Control switch closure is by supplying simultaneously
Electric end VLDO is SIM card power supply.
The mobile terminal, wherein include: inside the central processing unit sequentially connected switch control unit, in
Disconnected detection unit interrupts configuration unit；The interruption detection unit also passes through GPIO foot and connect and connect with the detection circuit
To the VDD pin of card interface；
Switch control unit is connect with the switch of the detection circuit, the closing or opening for control switch；
It interrupts GPIO foot in detection unit to be connected with the VDD pin of card interface, for detecting the letter of the interruption on VDD pin
Number；
The interruption that configuration unit is interrupted for GP configuring IO foot detects；
After mobile terminal-opening, switch control unit disconnects control switch, and it is low for interrupting configuration of described dispensing unit GPIO
Level interrupt；When SIM card is not inserted into the deck of card interface, each foot of card interface is hanging, and VDD pin passes through first resistor and power supply
End VLDO is connected, and VDD is pulled to high level；
When there is card insertion to enter deck, each pin of card interface is in contact with each pin of SIM card respectively；SIM card VDD draws
Resistance between foot and VSS foot is less than first resistor, is low level at VDD；And GPIO is low level interruption, and it is single to interrupt detection
Member will test SIM card insertion；It interrupts configuration unit to be configured to GPIO not detect interruption, Simultaneous Switching control unit will be controlled
It is SIM card power supply that system, which is closed the switch by feeder ear VLDO,.
The mobile terminal, wherein the resistance value of the first resistor is greater than 10*Rds；The Rds is that SIM card is not powered
Resistance value under state, between SIM card VDD foot and VSS foot.
The mobile terminal, wherein the first resistor is 600 M Ω, and feeder ear VLDO is 1.8V.
A kind of SIM card detection method of base mobile terminal described above, wherein include:
A, setting one GPIO pin being inserted into for detecting SIM card, when SIM card is not inserted into, GPIO pin be will test
High level, when SIM card insertion, GPIO pin will test low level；
In mobile terminal start-up course the GPIO is arranged as failing edge interruption, and when the failing edge interrupts in B
Think that SIM card is inserted into when generation；
If C detect that generating failing edge on GPIO interrupts, is judged as that SIM card is inserted under mobile terminal-opening state
Enter.
The SIM card detection method based on mobile terminal, wherein the step A further include:
A1 is disconnected control switch by the switch control unit of central processing unit, is interrupted configuration of described dispensing unit GPIO and is
Low level is interrupted.
The SIM card detection method based on mobile terminal, wherein the step C further include:
C1 detects that GPIO can be matched by interrupting configuration unit when generating low level interruption at GPIO when interrupting detection unit
It is set to and does not detect interruption, it is SIM card power supply that control switch is closed by VLDO by Simultaneous Switching control unit.
SIM card detection method and mobile terminal provided by the present invention based on mobile terminal, the method pass through setting
One GPIO is for detecting SIM card insertion, and when SIM card is not inserted into, GPIO pin will test high level, when SIM card insertion
GPIO pin will test low level；In mobile terminal start-up course, the GPIO is set for failing edge interruption, and work as institute
It states failing edge and interrupts and think that SIM card is inserted into when generating；Under mobile terminal-opening state, decline is generated on GPIO if detected
Along when interrupting, it is believed that SIM card insertion.It can not influence to realize mobile terminal-opening state in the prior art by this method
The purpose of lower replacement SIM card, while the metal clips on deck in the prior art for SIM card detection can be removed, reach and subtracts
The purpose of lesser calorie pedestal product.
Detailed description of the invention
Fig. 1 is the SIM detection structure figure of the mobile terminal of the prior art.
Fig. 2 is the functional schematic block diagram of the preferred embodiment of mobile terminal of the present invention.
Fig. 3 is the card interface partial structural diagram of the preferred embodiment of mobile terminal of the present invention.
Fig. 4 is the refinement functional schematic block diagram of the preferred embodiment of mobile terminal of the present invention.
Fig. 5 is the flow chart of the preferred embodiment of the SIM card detection method the present invention is based on the mobile terminal.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer and more explicit, right as follows in conjunction with drawings and embodiments
The present invention is further described.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and do not have to
It is of the invention in limiting.
Fig. 2 is referred to, Fig. 2 is the functional schematic block diagram of the preferred embodiment of mobile terminal of the present invention.As shown in Fig. 2, this
The mobile terminal of inventive embodiments, comprising: sequentially connected card interface, detection circuit, central processing unit.
Wherein, the card interface is provided with deck, for connecting each pin of SIM card, is provided in the card interface
VDD pin and VSS pin, the VDD pin are used to power to SIM card, and the VSS pin is grounded for SIM card, that is, this hair
It is bright to only focus on two VDD pin (the power supply foot of SIM card), VSS pin (lower margin of SIM card) pins, as shown in Figure 3；
Wherein, detection circuit, central processing unit, as shown in Figure 4；
Detection circuit is connected with VDD, VSS foot of card interface；Include: inside the detection circuit feeder ear VLDO,
One switch and a first resistor R and a ground terminal, the switch is in parallel with the first resistor, and the feeder ear VLDO passes through
The switch and first resistor R of the parallel connection are connected to the VDD pin, and the ground terminal is connect with the VSS pin；Switch
It is controlled by the switch control unit of central processing unit；When switch control unit control switch disconnects, VDD pin passes through one
The first resistor R of 600M Ω is connected with feeder ear VLDO；When switch control unit control switch closure, VDD pin passes through
It is directly connected to feeder ear VLDO, the first resistor R of 600M Ω does not just have effect；The feeder ear VLDO is power supply electricity
Pressure, preferably, feeder ear VLDO is 1.8V.
The central processing unit is connect by GPIO foot with the detection circuit, for controlling after mobile terminal-opening
The switch disconnects, and when SIM card is not inserted into the deck of card interface, each foot of card interface is hanging, and the VDD pin of card interface passes through the
One resistance is connected with feeder ear VLDO, and VDD is pulled to high level；Be also used to when there is card insertion to enter deck, card interface it is each
Pin is in contact with each pin of SIM card respectively；Resistance between SIM card VDD pin and VSS foot is less than first resistor, VDD
Place is low level；GPIO is detected as low level interruption, then judgement detects that SIM card is inserted into；Control switch closure is by supplying simultaneously
Electric end VLDO is SIM card power supply.
As shown in figure 4, including: sequentially connected switch control unit inside central processing unit, interrupting detection unit, interrupt
Configuration unit；It is described interrupt detection unit and also pass through GPIO foot and connect with the detection circuit and be connected to the VDD of card interface draw
Foot；
Switch control unit is connect with the switch of the detection circuit, the closing or opening for control switch；
It interrupts GPIO pin in detection unit to be connected with the VDD pin of card interface, for detecting the letter of the interruption on VDD pin
Number；
The interruption that configuration unit is interrupted for GP configuring IO detects, and can be made into low level interruption, can also be made into high electricity
It is flat to interrupt.
It is described below card interface, detection circuit, how each unit works in central processing unit；
After mobile terminal-opening, switch control unit disconnects control switch, and it is low for interrupting configuration of described dispensing unit GPIO
Level interrupt；When SIM card is not inserted into deck, i.e., when each foot of card interface is hanging, VDD pin passes through the first resistor R of 600M Ω
It is connected with feeder ear VLDO, therefore, VDD is pulled to high level, will not generate low level interrupt signal at GPIO；
When there is card insertion to enter deck, each pin of card interface is in contact with each pin of SIM card respectively；And SIM card VDD
It is low level at 600M Ω, VDD of the resistance much smaller than first resistor R between pin and VSS foot；And GPIO is in low level
Disconnected, therefore, SIM card insertion will be will test by interrupting detection unit；Later, GPIO can be configured to not examine by interrupting configuration unit
It surveys and interrupts, it is SIM card power supply that control switch is closed by feeder ear VLDO by Simultaneous Switching control unit.
Parameters used in this programme are as follows:
Feeder ear VLDO is the supply voltage of SIM card, the VDD pin of feeder ear VLDO and SIM card when using SIM card
It is connected, preferably, feeder ear VLDO is 1.8V；
Under the non-power supply state of SIM card, the resistance between SIM card VDD pin and VSS foot is much smaller than 600M Ω, generally,
Resistance between SIM card VDD pin and VSS foot is about 60k Ω；
600 M Ω resistance are preferred value inside detection circuit in Fig. 4, also can choose other resistance values, only need to be resistance
Value is greater than 10*Rds；The Rds is the resistance value under the non-power supply state of SIM card, between SIM card VDD pin and VSS foot；
In Fig. 4, according to Rds=60k Ω, when SIM card is inserted into deck and switch disconnects, voltage (namely at GPIO) at VDD
For in general 10% lower than supply voltage is considered low level, so GPIO will test low level interruption.
Based on the working principle of above-mentioned mobile terminal embodiment, the mobile terminal of this mobile terminal embodiment includes when working
Following steps:
S10, switch control unit disconnect control switch, interrupt configuration of described dispensing unit GPIO as low level interruption；
S20 detects that GPIO can be matched by interrupting configuration unit when generating low level interruption at GPIO when interrupting detection unit
It is set to and does not detect interruption, it is SIM card power supply that control switch is closed by VLDO by Simultaneous Switching control unit.
Therefore the mobile terminal of the embodiment of the present invention, it can not influence to realize that mobile terminal is opened in the prior art
The purpose of SIM card is replaced under machine state, while can remove the metal clips on deck in the prior art for SIM card detection,
Achieve the purpose that reduce deck volume.
Based on above-mentioned mobile terminal embodiment, the present invention also provides a kind of inspections of the SIM card of base mobile terminal described above
Survey method, as shown in Figure 5, which comprises
Step S100, setting one for detecting the GPIO pin of SIM card insertion, the GPIO pin when SIM card is not inserted into
It will test high level, GPIO pin will test low level when SIM card insertion.
In the embodiment of the present invention, refering to what is shown in Fig. 4, one GPIO((universal input/output of setting)) pin, GPIO pin
It is connect with the card interface for grafting SIM card.And the GPIO pin when SIM card is not inserted into is set and will test high level, work as SIM
The fashionable GPIO pin of card insertion will test low level.
With reference to Fig. 4, control switch is disconnected by the switch control unit of central processing unit, interrupts configuration of described dispensing unit
GPIO is low level interruption.With specific reference to described in above-mentioned mobile terminal embodiment.
In mobile terminal start-up course the GPIO is arranged as failing edge interruption, and work as the decline in step S200
Think that SIM card is inserted into when generating along interruption.
If step S300 detect that generating failing edge on GPIO interrupts, is judged as under mobile terminal-opening state
SIM card insertion.
In the embodiment of the present invention, a GPIO is set for detecting SIM card insertion, the GPIO pin when SIM card is not inserted into
It will test high level, GPIO pin will test low level when SIM card insertion；In mobile terminal start-up course, setting
The GPIO is failing edge interruption, and thinks that SIM card is inserted into when the failing edge is interrupted and generated；In mobile terminal-opening shape
Under state, if detect that generating failing edge on GPIO interrupts, it is believed that SIM card insertion.It can not influence by this method
The purpose that SIM card is replaced under mobile terminal-opening state is realized in the prior art.
Detect that GPIO can be configured to by interrupting configuration unit when generating low level interruption at GPIO when interrupting detection unit
Interruption is not detected, and it is SIM card power supply that control switch is closed by VLDO by Simultaneous Switching control unit.
In conclusion a kind of SIM card detection method and mobile terminal, the method based on mobile terminal of the present invention passes through
One GPIO is set for detecting SIM card insertion, GPIO pin will test high level when SIM card is not inserted into, when SIM card is inserted
Fashionable GPIO pin will test low level；In mobile terminal start-up course, the GPIO is set for failing edge interruption, and
Think that SIM card is inserted into when the failing edge, which interrupts, to be generated；Under mobile terminal-opening state, generated on GPIO if detected
When failing edge interrupts, it is believed that SIM card insertion.It can not influence to realize mobile terminal-opening in the prior art by this method
The purpose of SIM card is replaced under state, while can remove the metal clips on deck in the prior art for SIM card detection, is reached
To the purpose for reducing deck volume.
Certainly, those of ordinary skill in the art will appreciate that realizing all or part of the process in above-described embodiment method,
It is that related hardware (such as processor, controller etc.) can be instructed to complete by computer program, the program can store
In a computer-readable storage medium, which may include the process such as above-mentioned each method embodiment when being executed.Its
Described in storage medium can be for memory, magnetic disk, CD etc..
It should be understood that the application of the present invention is not limited to the above for those of ordinary skills can
With improvement or transformation based on the above description, all these modifications and variations all should belong to the guarantor of appended claims of the present invention
Protect range.
Claims (7)
1. a kind of mobile terminal characterized by comprising sequentially connected card interface, detection circuit, central processing unit；
The card interface is provided with deck, for connecting each pin of SIM card, be provided in the card interface VDD pin and
VSS pin, the VDD pin are used to power to SIM card, and the VSS pin is grounded for SIM card；
Detection circuit is connected with VDD, VSS foot of card interface；Include: a feeder ear VLDO inside the detection circuit, one open
Pass and a first resistor and a ground terminal, the switch is in parallel with the first resistor, and the feeder ear VLDO passes through parallel connection
The switch and first resistor are connected to the VDD pin, and the ground terminal is connect with the VSS pin；
The central processing unit is connect by GPIO foot with the detection circuit, is used for after mobile terminal-opening, described in control
Switch disconnects, and when SIM card is not inserted into the deck of card interface, each foot of card interface is hanging, and the VDD pin of card interface passes through the first electricity
Resistance is connected with feeder ear VLDO, and VDD is pulled to high level；Being also used to work as has card insertion to enter deck, each pin of card interface
It is in contact respectively with each pin of SIM card；Resistance between SIM card VDD pin and VSS foot is less than first resistor, is at VDD
Low level；GPIO is detected as low level interruption, then judgement detects that SIM card is inserted into；Control switch closure is by feeder ear simultaneously
VLDO is SIM card power supply.
2. mobile terminal according to claim 1, which is characterized in that include: to be sequentially connected inside the central processing unit
Switch control unit, interrupt detection unit, interrupt configuration unit；The interruption detection unit also passes through GPIO foot and the inspection
Slowdown monitoring circuit connects and is connected to the VDD pin of card interface；
Switch control unit is connect with the switch of the detection circuit, the closing or opening for control switch；
It interrupts GPIO foot in detection unit to be connected with the VDD pin of card interface, for detecting the interrupt signal on VDD pin；
The interruption that configuration unit is interrupted for GP configuring IO foot detects；
After mobile terminal-opening, switch control unit disconnects control switch, and interruption configuration of described dispensing unit GPIO is low level
It interrupts；When SIM card is not inserted into the deck of card interface, each foot of card interface is hanging, and VDD pin passes through first resistor and feeder ear
VLDO is connected, and VDD is pulled to high level；
When there is card insertion to enter deck, each pin of card interface is in contact with each pin of SIM card respectively；SIM card VDD pin with
Resistance between VSS foot is less than first resistor, is low level at VDD；And GPIO is low level interruption, interrupting detection unit will
Detect that SIM card is inserted into；It interrupts configuration unit to be configured to GPIO not detect interruption, Simultaneous Switching control unit opens control
It is SIM card power supply that conjunction, which is closed, by feeder ear VLDO.
3. mobile terminal according to claim 1, which is characterized in that the resistance value of the first resistor is greater than 10*Rds；Institute
Stating Rds is the resistance value under the non-power supply state of SIM card, between SIM card VDD foot and VSS foot.
4. mobile terminal according to claim 1, which is characterized in that the first resistor is 600 M Ω, feeder ear VLDO
For 1.8V.
5. a kind of SIM card detection method based on any one of the claim 1-4 mobile terminal characterized by comprising
A, setting one GPIO pin being inserted into for detecting SIM card, when SIM card is not inserted into, GPIO pin will test high electricity
Flat, when SIM card insertion, GPIO pin will test low level；
In mobile terminal start-up course the GPIO pin is arranged as failing edge interruption, and when the failing edge interrupts in B
Think that SIM card is inserted into when generation；
If C detect that generating failing edge in GPIO pin interrupts, is judged as that SIM card is inserted under mobile terminal-opening state
Enter.
6. SIM card detection method according to claim 5, which is characterized in that the step A further include:
A1 is disconnected by the switch control unit control switch of central processing unit, and interruption configuration of described dispensing unit GPIO is low level
It interrupts.
7. SIM card detection method according to claim 5, which is characterized in that the step C further include:
C1 detects that GPIO can be configured to by interrupting configuration unit when generating low level interruption at GPIO when interrupting detection unit
Interruption is not detected, and it is SIM card power supply that control switch is closed by VLDO by Simultaneous Switching control unit.
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| CN201610400950.2A CN106412152B (en) | 2016-06-08 | 2016-06-08 | A kind of SIM card detection method and mobile terminal based on mobile terminal |
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| CN201610400950.2A CN106412152B (en) | 2016-06-08 | 2016-06-08 | A kind of SIM card detection method and mobile terminal based on mobile terminal |
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| CN107069272B (en) * | 2017-03-13 | 2021-07-20 | 宇龙计算机通信科技(深圳)有限公司 | SIM card holder, terminal, SIM card detection method and detection device |
| CN107147432A (en) * | 2017-06-14 | 2017-09-08 | Tcl移动通信科技（宁波）有限公司 | Mobile terminal and its implementation, storage device that a kind of detection NFC starts |
| CN107271887A (en) * | 2017-07-27 | 2017-10-20 | 惠州Tcl移动通信有限公司 | A kind of two-in-one smart card tester and test system |
| CN108173560A (en) * | 2018-01-31 | 2018-06-15 | 维沃移动通信有限公司 | A kind of deck anti-static circuit and electronic equipment |
| EP3720105A4 (en) | 2018-02-01 | 2021-01-06 | Huawei Technologies Co., Ltd. | Electronic device |
| CN109525017B (en) * | 2018-12-21 | 2020-07-07 | 惠州Tcl移动通信有限公司 | Charging circuit and electronic device |
| CN110086491A (en) * | 2019-04-30 | 2019-08-02 | 北京智芯微电子科技有限公司 | SIM and eSIM hardware device for intelligently switching in telecommunication unit |
| CN111241023B (en) * | 2020-01-19 | 2021-10-26 | 惠州Tcl移动通信有限公司 | Insertion detection circuit and method of flash memory card, and electronic device |
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