CN100495377C - Method for inspecting type of connected peripheral apparatus and terminal interface - Google Patents
Method for inspecting type of connected peripheral apparatus and terminal interface Download PDFInfo
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- CN100495377C CN100495377C CNB2007100873224A CN200710087322A CN100495377C CN 100495377 C CN100495377 C CN 100495377C CN B2007100873224 A CNB2007100873224 A CN B2007100873224A CN 200710087322 A CN200710087322 A CN 200710087322A CN 100495377 C CN100495377 C CN 100495377C
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Abstract
A method for detecting out type of inserted external device includes connecting detection pin to detection interface, detecting level high or low of detection pin, controlling level of detection interface and level of detection pin to confirm that external device is the first external device with detection pin suspension and external device is the second external device with detection pin being ground through the third resistance as well as external device is the third external device with detection pin being directly grounded in order to use one interface to identify three types of different external devices.
Description
Technical field
The present invention relates to terminal technology, be specifically related to detect method and the terminal interface that inserts the peripheral hardware type.
Background technology
Along with the function of terminal device such as mobile phone etc. is more and more abundanter, the peripheral hardware that needs is also more and more, for example the most frequently used peripheral hardware of mobile phone just has charger, USB (Universal Serial Bus, USB (universal serial bus)) and earphone etc., because the usable interface resource of terminal devices such as mobile phone is few, the increase of peripheral hardware may cause interface resource not enough, and interface of each peripheral hardware also can cause the waste of circuit and the increase of cost.
Thereby, generally adopt the scheme of the public interface of a plurality of peripheral hardwares for circuit can be fully utilized and reduce cost, thus reduce the interface resource that the unit peripheral hardware need take, reduce the waste of circuit.Existing a kind of scheme is the shared physical interface of charger and earphone, terminal has detected equipment insert after, whether having detected voltage input by power management chip, to discern peripheral hardware be charger or earphone.If power management chip can not detect voltage input, the outer earphone that is made as of Cha Ruing then, thus open the earphone control circuit; If power management chip has detected voltage input, the outer charger that is made as of Cha Ruing then, thus open charger control circuit.
Existing another kind of scheme is the shared physical interface of charger and USB, but, the circuit structure of charger interface and USB interface is different, detect the voltage input by power management chip and produce interruption, if detecting the detected level of pin does not change, the outer USB that is made as of Cha Ruing then, otherwise, if detecting the detected level of pin is low level, the outer charger that is made as of Cha Ruing then, thereby can well discern the outer USB of being made as or the charger of insertion, thereby open corresponding control circuit.
The interface of scheme that uses prior art to provide can only be discerned two kinds of different peripheral hardwares, when the peripheral hardware type more for a long time, also can cause interface resource not enough; And when normal the use, though the scheme of using prior art to provide can well be discerned charger and earphone, but when charger is electrically interposed on not, because power management chip detects less than the voltage input is arranged, what then can think insertion is earphone, thereby opens the earphone control circuit, if charger is powered on this moment again, will bring harmful effect to circuit, serious may burn out circuit.
Summary of the invention
The technical matters that the embodiment of the invention will solve provides and detects method and the terminal interface that inserts the peripheral hardware type, and the technical scheme of using the embodiment of the invention to provide can be by three kinds of dissimilar peripheral hardwares of an interface identification.
The purpose of the embodiment of the invention is achieved through the following technical solutions:
The embodiment of the invention provides a kind of method of inserting the peripheral hardware type that detects, and comprising:
Detection pin on the Peripheral Interface that inserts is pulled to by pull-up resistor draws power supply, and described detection pin is connected with the detection interface that places high-impedance state by first resistance, the level that detects described detection pin just;
If high level, the described detection interface that places high-impedance state placed low level after, detect the level height of described detection pin again, if described detection pin is a low level, the outer first unsettled peripheral hardware of detector tube pin that is made as of described insertion then;
If low level, after the described detection interface that places high-impedance state placed high level, detect the level height of described detection pin again, if described detection pin is a high level, outer second peripheral hardware that is made as the detector tube pin by the 3rd resistance eutral grounding of described insertion then; If be low level, outer directly grounded the 3rd peripheral hardware of detector tube pin that is made as of described insertion then.
The embodiment of the invention provides a kind of terminal interface, and the pin corresponding with peripheral hardware detection pin is pulled to by pull-up resistor and draws power supply, and the described pin corresponding with peripheral hardware detection pin is connected with the detection interface by a resistance.
The above technical scheme that provides from the embodiment of the invention as can be seen, draw owing to will detect on the signal on the pin, and by the level that detects interface is controlled, thereby detect pin at the different level combination of the circuit structure generation of different peripheral, thereby identify the type of peripheral hardware according to the difference of level combination, and can discern three kinds of dissimilar peripheral hardwares at least, thereby reduce taking limited interface resource on the terminal.And whether the scheme that the embodiment of the invention provides is not only used has the voltage input as the foundation of judging the peripheral hardware type, thereby can not think the peripheral hardware of not charged insertion by mistake earphone, thereby can not bring harmful effect to circuit.
Description of drawings
Fig. 1 is the particular flow sheet of the inventive method first embodiment;
Fig. 2 is the structural drawing of terminal interface first embodiment of the present invention;
Fig. 3 is the structural drawing of charger interface first embodiment of the present invention and USB interface first embodiment;
Fig. 4 is the structural drawing of charger interface second embodiment of the present invention;
Fig. 5 is the structural drawing of USB interface second embodiment of the present invention;
Fig. 6 is the structural drawing of earphone interface first embodiment of the present invention;
Fig. 7 is the particular flow sheet of the inventive method second embodiment;
Fig. 8 is the structural drawing of terminal interface second embodiment of the present invention;
Fig. 9 is the particular flow sheet of the inventive method the 3rd embodiment;
Figure 10 is the structural drawing of charger interface the 3rd embodiment of the present invention.
Embodiment
For make purpose of the present invention, technical scheme, and advantage clearer, below with reference to the accompanying drawing embodiment that develops simultaneously, the present invention is described in more detail.
Referring to Fig. 1, first embodiment of the inventive method mainly comprises:
Step 101, the detection pin on the Peripheral Interface that inserts is pulled to by pull-up resistor draws power supply, and described detection pin is connected with the detection interface that places high-impedance state by first resistance;
The detection pin is done above-mentioned processing can produce different signals, because the circuit structure difference of dissimilar peripheral hardwares according to different peripheral hardware types; The structure of terminal interface first embodiment provided by the invention is as shown in Figure 2:
This terminal interface adopts small-sized USB (mini USB) interface standard, mainly comprise and detect pin, ground pin and function pin, wherein the function pin is according to terminal interface accepted standard difference and quantity is different, for example when using the mini standard usb interface, the quantity of function pin is three, be respectively function pin one, function pin two and function pin 3, during corresponding different peripheral hardware, the function of function pin is different respectively.This instructions mainly adopts the mini USB interface to be described, and the mini USB interface also is one of most widely used interface in as terminals such as mobile phones, but the present invention does not get rid of the situation that adopts other interface standards.
Wherein detect pin and be connected with the detection interface by first resistance R 1, this detection interface is defaulted as high-impedance state; Also be pulled to and draw power Vcc by pull-up resistor R2.Like this when peripheral hardware inserts, the detection pin of peripheral hardware is connected with detection pin on the terminal interface, just the detection pin on the Peripheral Interface can be pulled to Vcc by R2, and be connected with the detection interface that places high-impedance state by R1; The resistance value of R1 is less than the resistance value of R2 among a kind of embodiment provided by the invention.First embodiment of terminal interface provided by the invention has only one to detect pin, so can reduce taking limited interface area on the terminal.
Detector tube heel on the Peripheral Interface is according to the difference of peripheral hardware type, and circuit structure is different, so corresponding level also can be different.
First peripheral hardware that the embodiment of the invention provides can be charger or USB, and wherein first embodiment of first embodiment of charger interface and USB interface is as shown in Figure 3:
Wherein charger interface 301, mainly comprise detecting pin, ground pin and charging inlet, wherein detect pin and are connected with detection pin on the terminal interface, and ground pin is connected with ground pin on the terminal interface; Charging inlet can be connected with any one the function pin on the terminal interface according to the difference of circuit design, thereby terminal is charged.
Introduce the testing process that detects the unsettled charger of pin on the docking port below in detail: when the not charged insertion of charger, owing to can not produce interruption, so terminal can not be discerned existing peripheral hardware and insert, thereby can not open corresponding control circuit, terminal can be given tacit consent to and opens the USB control circuit, also can give tacit consent to and not open any control circuit, wherein to open the USB control circuit be because the electric current minimum that USB needs to acquiescence, opening the USB control circuit can be with Current Control minimum, thereby can the circuit of terminal not exerted an influence; When the charged insertion of charger or insert the back when charged, have the voltage input at the charging pin, to interrupt thereby produce, terminal has detected peripheral hardware and has inserted.This moment, the detection interface on the terminal interface was a high-impedance state, and the detection pin on the charger interface is unsettled, and detected pin and be pulled to Vcc by R2, so detect the level that detects on the pin this moment for high; In order further to identify the type of peripheral hardware, to detect interface and place low level, this moment because the resistance value of R2 greater than the resistance value of R1, by the dividing potential drop effect of resistance, detecting this moment and detecting pin is low level, is to detect the unsettled charger of pin on the interface so terminal can identify peripheral hardware.First embodiment of charger interface is applied to charger, can makes first embodiment of terminal interface use a detection pin to identify a plurality of peripheral hardwares, comprising the charger of using charger interface first embodiment.
Detect the identifying of the unsettled USB of pin on the interface, similar with the identifying that detects the unsettled charger of pin on the above-mentioned interface, main testing process is such: when the charged insertion of USB or insert the back when charged, have the voltage input at the VBUS pin, interrupt thereby produce, terminal has detected peripheral hardware and has inserted.This moment, the detection interface on the terminal interface was a high-impedance state, and the detection pin on the USB interface is unsettled, and detected pin and be pulled to Vcc by R2, so detect the level that detects on the pin this moment for high; In order further to identify the type of peripheral hardware, to detect interface and place low level, this moment because the resistance value of R2 greater than the resistance value of R1, by the dividing potential drop effect of resistance, detecting this moment and detecting pin is low level, is to detect the unsettled USB of pin on the interface so terminal can identify peripheral hardware.The insertion of USB also is divided into charged insertion and not charged insertion, and wherein voltage is imported by the VBUS pin.The example of the mini USB that present embodiment provides, but the situation of exclusion standard USB not.First embodiment of USB interface is applied to USB device, can makes first embodiment of terminal interface use a detection pin to identify a plurality of peripheral hardwares, comprising the USB device of using USB interface first embodiment.
Outer second peripheral hardware that is made as the detector tube pin by the 3rd resistance eutral grounding of step 107, the described insertion of judgement; Process ends;
Second peripheral hardware that the embodiment of the invention provides also can be charger or USB, wherein second embodiment of charger interface as shown in Figure 4, mainly comprise: detect pin, ground pin and charging pin, wherein detect pin and be connected with ground pin by the 3rd resistance R 3, with just be equivalent to by R3 ground connection after terminal interface is connected.
Introduce in detail below and detect the testing process of pin on the docking port: when the not charged insertion of charger by the charger of R3 ground connection, owing to can not produce interruption, so terminal can not be discerned existing peripheral hardware and insert, have only when the charged insertion of charger or insert the back when charged, have the voltage input at the charging pin, interrupt thereby produce, terminal has detected peripheral hardware and has inserted.Detection interface on the terminal interface is a high-impedance state at this moment, and the detection pin on the charger interface is by R3 ground connection, and detect pin and be pulled to Vcc by R2, because the resistance value of R3 less than the resistance value of R2, is low so detect the level that detects on the pin this moment; In order further to identify the type of peripheral hardware, to detect interface and place high level, this moment because the resistance value of R3 greater than the resistance value of R1, voltage divider principle according to parallel circuit and series circuit, detecting this moment and detecting pin is high level, is to detect the charger of pin by R2 ground connection on the interface so terminal can identify peripheral hardware.Second embodiment of charger interface is applied to charger, can makes first embodiment of terminal interface use a detection pin to identify a plurality of peripheral hardwares, comprising the charger of using charger interface second embodiment.
Second embodiment of USB interface provided by the invention mainly comprises as shown in Figure 5:
Mainly comprise and detect pin, ground pin, VBUS pin, data input pin and data output pin, wherein detect pin and be connected with ground pin, when USB interface is connected with terminal interface, detect pin like this and just be equivalent to by R3 ground connection by the 3rd resistance R 3.Equally, the identification of the USB interface by R3 ground connection is similar with the identifying of charger interface by R3 ground connection, and main testing process is such: when the charged insertion of USB or insert the back when charged, have the voltage input at the VBUS pin, interrupt thereby produce, terminal has detected peripheral hardware and has inserted.Detection interface on the terminal interface is a high-impedance state at this moment, and the detection pin on the USB interface is by R3 ground connection, and detect pin and be pulled to Vcc by R2, because the resistance value of R3 less than the resistance value of R2, is low so detect the level that detects on the pin this moment; In order further to identify the type of peripheral hardware, to detect interface and place high level, this moment because the resistance value of R3 greater than the resistance value of R1, voltage divider principle according to parallel circuit and series circuit, detecting this moment and detecting pin is high level, is to detect the USB of pin by R2 ground connection on the interface so terminal can identify peripheral hardware.Second embodiment of USB interface is applied to USB device, can makes first embodiment of terminal interface use a detection pin to identify a plurality of peripheral hardwares, comprising the USB device of using USB interface second embodiment.
Outer directly grounded the 3rd peripheral hardware of detector tube pin that is made as of step 108, the described insertion of judgement.
The 3rd peripheral hardware can be an earphone, and that Fig. 6 describes is first embodiment of earphone interface provided by the invention, mainly comprises: detect pin, ground pin, MONO_HPL pin and MIC pin, wherein MONO_HPL pin and MIC pin are the function pins of earphone; Wherein detect pin and directly link to each other, also just be equivalent to detect the direct ground connection of pin with ground pin.
The identifying that detects the directly grounded earphone of pin on the docking port is such: at earphone interface with before terminal interface is connected, be defaulted as high-impedance state owing to detect interface, detect pin and be pulled to by pull-up resistor and draw power supply, so the detection pin on this moment terminal interface is a high level; When earphone interface with after terminal interface is connected directly be connected owing to detect pin with the ground connection interface, promptly detect pin ground connection, become low level so detect pin, produced interruption, terminal has detected peripheral hardware and has inserted, and the level that detects on the detection pin is a low level; Further will detect interface and place high level, be directly grounded owing to detect pin, remains low level so detect pin this moment, thereby outer being made as that terminal can identify insertion detected pin and the direct-connected earphone of ground pin on the interface.First embodiment of earphone interface is applied to earphone, can makes first embodiment of terminal interface use a detection pin to identify a plurality of peripheral hardwares, comprising the earphone of using earphone interface first embodiment.
From first embodiment of the inventive method as can be seen, after having detected the peripheral hardware insertion, by the level that detects on the interface is regulated, thereby identify different peripheral hardware types according to detecting the pin flat various combination that powers on, and can discern three kinds of dissimilar peripheral hardware types, thereby reduce taking interface resource limited on the terminal; And charger or USB to not charged insertion also can correctly discern, thus can be wrong open control circuit, circuit is exerted an influence.
Second embodiment of the inventive method mainly may further comprise the steps as shown in Figure 7:
There are two terminals that detect pin to detect the peripheral hardware insertion on step 701, the terminal interface;
Adopted two to detect pin, the earphone on one of them existing interface inserts and detects interface, can produce interruption when earphone inserts, and this detection pin connects low level, thereby the peripheral hardware that can judge insertion is an earphone, and this is identical with prior art; Other peripheral hardwares can not detect pin with this when inserting and be connected, but be connected with the second detection pin, with charger and USB is example, when standard charging device interface is connected with terminal interface, wherein the detection pin on the standard charging device interface and the second detection pin are connected, interrupt thereby drag down to produce, but the detection pin on the USB interface and the second detection pin can't produce interruption after being connected; To whether having the detection of peripheral hardware insertion to judge by detecting whether to have to interrupt producing, earphone inserts to detect directly to produce on the pin first and interrupts, and charger and USB insertion are by there being the voltage input to produce interruption, wherein the voltage of charger is by the input of charging pin, and the voltage of USB is imported by the VBUS pin.
Do you step 702, judge that first detects pin and interrupt? if enter step 703; If not, enter step 704;
Step 703, described outer first peripheral hardware that is made as; Process ends;
After outside can judging, being made as first peripheral hardware, outside first, be made as earphone, then can open the earphone control circuit;
Do step 704, detection second detect the level height of pin? if be low, enter step 705, if be high, enter step 706;
Step 705, described outer second peripheral hardware that is made as; Process ends;
Accordingly, for example second peripheral hardware is a charger, then opens charger control circuit;
Step 706, described outer the 3rd peripheral hardware that is made as; Process ends;
For example the 3rd be made as USB outward, then open the USB control circuit.
From second embodiment of the inventive method as can be seen, increasing a detection pin on interface discerns second peripheral hardware and the 3rd peripheral hardware, original detection pin is still discerned first peripheral hardware, thereby can be by using the peripheral hardware of three types of interface identifications, certainly, if needs are arranged, can further increase the detection pin and realize the more identification of polymorphic type peripheral hardware.
Second embodiment of terminal interface provided by the invention as shown in Figure 8, mainly comprise: first detects pin, second detects pin, ground pin and function pin, wherein the quantity of function pin does not wait from one to a plurality of, and concrete quantity is determined according to concrete interface standard.By using this terminal interface can discern at least three types peripheral hardware, discern more peripheral hardware thereby can also further increase the detection pin certainly, thereby reduce taking interface resource limited on the terminal.
The 3rd embodiment of the inventive method mainly comprises as shown in Figure 9:
Equally, be example with earphone, charger and USB, the insertion identification of earphone is to interrupt judging the insertion of charger and USB is by whether having voltage input to discern by inserting at earphone to detect to produce on the pin;
Do you step 902, judge that first detects pin and interrupt? if enter step 903; If not, enter step 904;
Produce interruption because first detects pin, only when earphone inserts, just can drag down the first detection pin generation and interrupt, thereby can judge the outer earphone that is made as of insertion, thereby open the earphone control circuit;
Is what step 905, judgment data reception pin received described detection data? if not, enter step 906; If enter step 907;
Because Data Receiving pin on the 3rd peripheral hardware and data transmitting pin are by short circuit, just Data Receiving pin and data transmitting pin are for the not effect of the 3rd peripheral hardware, thereby by data transmitting pin transmission detection data, the data that the Data Receiving pin receives also can be these detection data, thereby can determine outer the 3rd peripheral hardware that is made as Data Receiving pin and data transmitting pin short circuit that inserts;
From the 3rd embodiment of method provided by the invention as can be seen, the data transmitting pin and the Data Receiving pin of charger interface are carried out short circuit, thereby can be not to other interfaces, improve as earphone interface, terminal interface and USB interface, only utilize existing recognition technology just can identify three kinds of dissimilar peripheral hardwares, thereby reduced taking interface resource limited on the terminal.
The 3rd embodiment of charger interface provided by the invention mainly comprises as shown in figure 10: detect pin, ground pin, charging pin, data output pin and Data Receiving pin; Wherein data output pin and Data Receiving pin short circuit, at this charger interface with after terminal interface is connected, data output pin on the charger interface is connected with data output pin on the terminal interface, Data Receiving pin on the charger interface is connected with Data Receiving pin on the terminal interface, thereby the data that terminal sends by the data output pin all can directly return to the Data Receiving pin on the terminal interface.The 3rd embodiment of charger interface is applied to charger, can when using the 3rd embodiment, makes a plurality of peripheral hardwares of terminal recognition, comprising the charger of using charger interface the 3rd embodiment.
From the above, the technical scheme that the embodiment of the invention provides only needs the less physical pins on the occupied terminal just can realize identification at least three kinds of dissimilar peripheral hardwares, thereby has reduced taking interface resource limited on the terminal; Further, whether the present invention not only uses the identification of voltage input as earphone and other peripheral hardwares, thereby can not think uncharged other peripheral hardwares by mistake to be earphone, thereby can not open the earphone control circuit, can not exert an influence to circuit.
More than the method for peripheral hardware type is inserted in detection that the embodiment of the invention provided, terminal, earphone, charger and USB interface are described in detail, the explanation of above embodiment just is used for helping to understand method of the present invention and thought thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, the part that all can change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (6)
1, a kind of method of inserting the peripheral hardware type that detects is characterized in that, comprising:
Detection pin on the Peripheral Interface that inserts is pulled to by pull-up resistor draws power supply, and described detection pin is connected with the detection interface that places high-impedance state by first resistance, the level that detects described detection pin just;
If high level, the described detection interface that places high-impedance state placed low level after, detect the level height of described detection pin again, if described detection pin is a low level, the outer first unsettled peripheral hardware of detector tube pin that is made as of described insertion then;
If low level, after the described detection interface that places high-impedance state placed high level, detect the level height of described detection pin again, if described detection pin is a high level, outer second peripheral hardware that is made as the detector tube pin by the 3rd resistance eutral grounding of described insertion then; If be low level, outer directly grounded the 3rd peripheral hardware of detector tube pin that is made as of described insertion then.
2, the method for peripheral hardware type is inserted in detection as claimed in claim 1, it is characterized in that, the Peripheral Interface of described insertion adopts Small Universal serial bus USB interface.
3, the method for peripheral hardware type is inserted in detection as claimed in claim 1 or 2, it is characterized in that the described first outer equipment of using USB interface that is made as, the described second outer charger that is made as, the described the 3rd outer earphone that is made as.
4, the method for peripheral hardware type is inserted in detection as claimed in claim 1 or 2, it is characterized in that the described first outer charger that is made as, the described second outer equipment of using USB interface that is made as, the described the 3rd outer earphone that is made as.
5, a kind of terminal interface is characterized in that, the pin corresponding with peripheral hardware detection pin is pulled to by pull-up resistor and draws power supply, and the described pin corresponding with peripheral hardware detection pin is connected with the detection interface by a resistance.
6, terminal interface as claimed in claim 5 is characterized in that, described terminal interface is a small USB interface.
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| CNB2007100873224A CN100495377C (en) | 2007-03-09 | 2007-03-09 | Method for inspecting type of connected peripheral apparatus and terminal interface |
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| CNB2007100873224A CN100495377C (en) | 2007-03-09 | 2007-03-09 | Method for inspecting type of connected peripheral apparatus and terminal interface |
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| CN100495377C true CN100495377C (en) | 2009-06-03 |
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| CN105579987B (en) * | 2013-09-06 | 2019-07-26 | 思科技术公司 | The port general PCI EXPRESS |
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