CN101383627A - Device and method for terminal charger charging, USB charging and data communication - Google Patents
Device and method for terminal charger charging, USB charging and data communication Download PDFInfo
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Abstract
The invention discloses a method for terminal charger charge, USB charge and data communication. The method includes the steps that a processor detects the triggering condition that the USB insertion interrupts and the charger insertion interrupts, if both interrupts are triggered, a charger is confirmed to be inserted in the terminal, and the charger charge process starts; if the condition that only the USB insertion interrupts is triggered, the condition that a USB data wire is inserted in the terminal is confirmed, the USB charge process starts, and USB data transmission is carried out. Meanwhile, the invention discloses a device for terminal charger charge, USB charge and data communication, which comprises a processor, a USB interface module and a selecting module, wherein the selecting module comprises a selecting end and two single input and double output switches. The invention provides users with a solution proposal that has the advantages of simple circuit structure, small resource occupation and great improvements of signal quality and data transmission reliability and integrates the functions of terminal charger charge, USB charge and data communication into a whole.
Description
Technical field
The present invention relates generally to the communication electronic applications, relates in particular to the device and method of a kind of terminal charger charging, USB charging and data communication.
Background technology
Country had issued " mobile phone charger and interfacing require and method of testing " in 2007, the cable and the interface between the plug of clear and definite prescribed terminal charger need adopt USB interface, and with the pin D+ and the D-short circuit of USB interface inside in the charger, and stube cable between charger and the terminal and interface are designed voluntarily by the designer.
Fig. 1 is the schematic diagram of terminal charger 101USB interface under the existing standard, and among Fig. 1, two pins in terminal charger 101 left sides are power input, and four pins in the right are respectively V
Bus, D+, D-and GND, wherein pin D+ is connected by inner lead with D-and by short circuit.
The scheme that existing employing USB interface is charged to terminal is to utilize to comprise general input and output (GPIO mostly, General Purpose Input Output) circuit of interface, logic controller or triode is realized detection and the differentiation to charger and usb data line, and is aided with corresponding method and realizes terminal is carried out charger charging or USB charging.
Fig. 2 is circuit theory diagrams of realizing terminal USB charging in the prior art by the GPIO interface, comprises among the figure:
Terminal inner charging module 201, charging inlet 202, outer computer 203, external charger 204 and rechargeable battery 205.Terminal inner charging module 201 comprises controller logic module 2011, and controller logic module 2011 comprises pin GPIO1, GPIO2, CHGDET, VCHG etc.
In terminal inner charging module 201, resistance R 6 is the pull-up resistor on the data wire of pin USB_DP place, the charge mode testing circuit comprises resistance R 2, R3, R4 and R5, wherein resistance R 2, R4 are the data wire formation dividing potential drop at USB_DM pin place, be input to pin GPIO1 through after the dividing potential drop, and resistance R 3, R5 to be the data wire at pin USB_DP place constitute dividing potential drop, be input to pin GPIO2 through after the dividing potential drop.Controller logic module 2011 is used for identification and carries out the full speed usb data communication with outer computer 203.
The entire circuit design principle is: controller logic module 2011 is according to the operating state of the voltage signal condition judgement terminal on pin GPIO1 and the GPIO2, thereby realization is charged and data communication to terminal by USB interface.
When charging inlet 202 inserts the usb data line interface of external charger 204 and outer computer 203 simultaneously, the pin USB_DP of usb data line interface and USB_DM are by short circuit, it all is high that the while circuit makes pin GPIO1 and GPIO2 go up voltage, so controller logic module 2011 judges that current states are charged state;
When charging inlet 202 only inserted the usb data line interface of outer computer 203, the pin USB_DP of usb data line interface and USB_DM be by short circuit, this moment circuit to make the voltage on the pin GPIO1 be low for the voltage on high, the pin GPIO2.Therefore controller logic module 2011 judges that current state is the data communication state.
At present because terminal charger standard YD/T1591-2006 the release time of " mobile phone charger and interfacing require and method of testing " also not long, that is that all right is ripe for existing technical scheme, has a lot of deficiencies, specific as follows:
Under the little situation of the volume of transmitted data of present terminal and external equipment, most of manufacturer terminals can only provide the USB1.1 interface used for terminal and PERCOM peripheral communication, the message transmission rate of USB1.1 interface is up to 12Mbps, carry out transfer of data in this speed, requirement to signal quality is not very harsh, yet along with the multimedia function of terminal and the increase day by day of data processing function, raising day by day to the requirement of data throughput, USB interface on the terminal must turn to supports the USB2.0 interface of transmission rate up to 480Mbps, because the USB2.0 interface will improve greatly to the requirement of circuit signal quality, thereby to guaranteeing in the USB circuit design that signal integrity proposes higher requirement, and the prior USB circuit design is directly at the pin D+ that participates in usb communication, increase parallel resistor on the data wire at D-place, inductance and electric capacity even load, cause the destruction of transmission rate, the reliability of USB2.0 interface communication is reduced greatly up to the signal integrity of 480Mbps.
Summary of the invention
In view of this, the object of the present invention is to provide the device and method of terminal charger charging, USB charging and data communication, be reached for the user provide circuit kit simple in structure, take that resource is few, terminal charger charging, USB charging and the three-in-one solution of data communication that signal quality and data transmission credibility are improved greatly.
The invention provides the device of terminal charger charging, USB charging and data communication, comprising:
Processor: comprise data-interface, first interface, second interface and the 3rd interface;
Usb interface module: comprise FPDP and power interface; Wherein, power interface is connected with second interface;
It is characterized in that, also comprise:
Select module: comprise selecting side, first switch and second switch, first switch and second switch comprise input, first output and second output respectively; Wherein, the selecting side is connected with the 3rd interface, is used to control the input of first, second switch and being connected of output; First output of first, second switch is connected with the data-interface of processor; Second output of first switch is connected with first interface, is used to trigger processor and produces the terminal charger insertion or extract interruption; Second output of second switch is connected with second interface, is used to trigger processor and produces the USB insertion or extract interruption; The input of first, second switch is connected with the FPDP of usb interface module.
This installs in the described selection module,
If the selecting side is a high level, then the input of first, second switch is connected with first output corresponding to this input;
If the selecting side is a low level, then the input of first, second switch is connected with second output corresponding to this input.
This installs described processor and comprises digital baseband block and Analog Baseband module, wherein,
Digital baseband block comprises usb interface unit, and this unit comprises first data-interface and second data-interface;
The Analog Baseband module comprises first interface, second interface and the 3rd interface.
This installs described Analog Baseband module and comprises the interruption controls unit, wherein,
First interface is connected with the interruption controls unit, is used to control the interruption controls unit and produces terminal charger insertion interruption;
Second interface is connected with the interruption controls unit, is used to control the interruption controls unit and produces terminal usb data interface insertion interruption.
This installs described Analog Baseband module and comprises power control unit, wherein,
Second interface is connected with power control unit, and for power control unit provides input voltage, power control unit is output voltage signal under digital baseband block control, and this voltage signal is by the output of the 3rd interface.
The present invention also provides the method for terminal charger charging, USB charging and data communication, comprising:
A. processor detects the triggering situation that USB inserts interruption and charger insertion interruption according to interrupt flag bit;
If B. USB insertion interruption and charger insert and interrupt all being triggered, determine that then terminal is in charger insertion state, startup charger charging flow; In this step,
After the usb interface module of charger and terminal connects, FPDP short circuit with usb interface module, power interface is accepted the charger power supply, make the signal on second interface be changed to high level, because the signal on the selecting side of selection module is a low level, the input of first, second switch is connected with second output corresponding to this input, and second input of first switch is connected with first interface, second input of second switch is connected with second interface, therefore, make the signal on first interface also be changed to high level;
High level signal on first interface triggers processor and produces USB insertion interruption;
High level signal on second interface triggers processor and produces terminal charger insertion interruption;
Interrupt being triggered if C. only there is USB to insert, then determine to be in the usb data line and insert state, start the USB charging flow, and carry out the usb data transmission; In this step,
After computer usb data interface and usb interface module connect, power interface is accepted the power supply of computer usb data interface, make the signal on second interface be changed to high level, high level signal on second interface triggers processor and produces terminal charger insertion interruption, and provide input voltage for power control unit, power control unit is output voltage signal under digital baseband block control, this voltage signal is by the output of the 3rd interface, select the signal of the selecting side of module to be changed to high level, first, the input of second switch is connected with first output corresponding to this input; The data-interface that makes digital baseband block connects by the FPDP and the computer usb data interface of usb interface module, carries out the usb data transmission;
After the signal of the selecting side of selection module is changed to high level, the input disconnection of first, second switch is connected with second output corresponding to this input, make the signal on first interface be changed to low level, produce terminal charger insertion interruption thereby can not trigger processor.
The described step B of this method also comprises:
The charger disconnection is connected with usb interface module, make the signal on first interface and second interface all be changed to low level, this low level signal triggering processor generation USB extracts interruption and terminal charger is extracted interruption, processor detects USB according to interrupt flag bit and extracts and interrupt and charger is extracted after interruption all is triggered charge closing device charging flow.
The described step C of this method also comprises:
The disconnection of usb data interface is connected with usb interface module, make the signal on second interface be changed to low level, this low level signal triggers processor and produces USB and extract interruption, processor according to interrupt flag bit detect USB extract interrupt being triggered after, close the USB charging flow.
The described processor of this method step B and C is the interrupt control unit in the Analog Baseband module.
Terminal charger charging of the present invention, the device and method of USB charging and data communication, realize the identification of terminal by a plurality of control units that on hardware circuit, increase in binary channels analog switch and Analog Baseband module that cooperates with this hardware circuit and the digital baseband block to charger and usb data line, to realize the charger charging or can carry out the USB charging of usb data communication simultaneously, avoided increasing extra circuit load on D+ and D-data wire, being reached for the user provides circuit kit simple in structure, it is few to take resource, the terminal charger charging that signal quality and data transmission credibility are improved greatly, the beneficial effect of the solution that USB charging and data communication are three-in-one.
Description of drawings
Fig. 1 is the schematic diagram of terminal charger USB interface under the existing standard;
Fig. 2 is circuit theory diagrams of realizing terminal USB charging in the prior art by the GPIO interface;
Fig. 3 is terminal charger charging among the present invention, USB charging and the three-in-one structure drawing of device of data communication;
Fig. 4 realizes the structure drawing of device of terminal charger charging when inserting for charger among the present invention;
Fig. 5 realizes the structure drawing of device of terminal USB charging and data communication when inserting for usb data interface among the present invention;
Fig. 6 is terminal charger charging among the present invention, USB charging and the three-in-one method flow diagram of data communication.
Embodiment
Fig. 3 is terminal charger charging among the present invention, USB charging and the three-in-one structure drawing of device of data communication, comprising:
This module also comprises interruption controls unit 3021, power control unit 3022 and charging control unit 3023, wherein,
Pin VCHG_DET is connected with interruption controls unit 3021, is used for the triggering terminal charger and inserts or extract interruption.
Pin VUSB_IN is connected with interruption controls unit 3021, is used to trigger USB and inserts or extract interruption.
Pin VUSB_IN also is connected with power control unit 3022, is used to power control unit 3022 that input voltage is provided, digital baseband block 301 control power control units 3022 output+3V voltage signal VUSB, and this voltage signal VUSB is by pin VUSB output.
Slot Power is connected with the pin VUSB_IN of Analog Baseband module 302.
Fig. 4 realizes the structure drawing of device of terminal charger charging when inserting for charger among the present invention, among Fig. 4, standard charging device 401 inserts USB socket 304, the pin GND of standard charging device 401 is connected with the slot GND of USB socket 304, the pin D+ of standard charging device 401 is connected with the slot D+ of USB socket 304, the pin D-of standard charging device 401 is connected with the slot D-of USB socket 304, and the pin VCHG of standard charging device 401 is connected with the slot Power of USB socket 304.In addition, two pins of the right-hand member of standard charging device 401 are the external power source input.
The course of work of device shown in Figure 4 is as follows:
The standard charging device inserts the USB socket of terminal, the slot Power of the pin VCHG of standard charging device by USB socket makes the signal on the pin VUSB_IN of Analog Baseband module be changed to high level, because pin D+ in the standard charging device and D-are by short circuit, and the analog switch of this moment is in the passage conducting state No. 0, therefore, signal on the pin VCHG_DET of Analog Baseband module also is changed to high level, the interrupt control unit that high level signal on the pin VUSB_IN will trigger in the simulation baseband module produces USB insertion interruption, the interrupt control unit that high level signal on the pin VCHG_DET will trigger in the simulation baseband module produces terminal charger insertion interruption, the Analog Baseband module detects according to interrupt flag bit that USB insert to interrupt and charger inserts after interruption all is triggered, determine that terminal is in charger and inserts state, start the charger charging flow.
After the standard charging device is extracted from the USB socket of terminal, the pin VCHG of standard charging device will disconnect and being connected of the slot Power of USB socket, make the signal on pin VUSB_IN and the VCHG_DET be changed to low level, the interrupt control unit generation USB that simulates in the baseband module extracts interruption and charger is extracted interruption thereby trigger, the Analog Baseband module detects USB according to interrupt flag bit and extracts and interrupt and charger is extracted after interruption all is triggered charge closing device charging flow.
Fig. 5 realizes the structure drawing of device of terminal USB charging and data communication when inserting for usb data interface among the present invention, among Fig. 5, computer usb data interface 501 inserts USB socket 304, the pin GND of computer usb data interface 501 is connected with the slot GND of USB socket 304, the pin D+ of computer usb data interface 501 is connected with the slot D+ of USB socket 304, the pin D-of computer usb data interface 501 is connected with the slot D-of USB socket 304, and the pin VBUS of computer usb data interface 501 is connected with the slot Power of USB socket 304.
The course of work of device shown in Figure 5 is as follows:
After computer usb data interface inserts the USB socket of terminal, the pin VBUS of computer usb data interface will make the signal of the pin VUSB_IN of Analog Baseband module be changed to high level by the slot Power of USB socket, the interrupt control unit that this high level signal triggers in the simulation baseband module produces USB insertion interruption, high level signal on the pin VUSB_IN also will provide input voltage for power control unit, digital baseband block control power control unit output+3V voltage VUSB, should+the VUSB interface output of 3V voltage VUSB by the Analog Baseband module, process pull-up resistor R1 is to analog switch channel selecting pin S, make pin S go up voltage signal and be changed to high level, thereby make No. 1 passage conducting of analog switch, No. 0 pathway closure.
No. 1 passage conducting of analog switch is connected pin D+, the D-of computer usb data interface respectively with pin USB_D+, the USB_D-of digital baseband block, carry out the usb data transmission thereby computer usb data interface is connected with the usb interface module of digital baseband block.
No. 0 pathway closure of analog switch is isolated from the outside the signal on the pin VCHG_DET of Analog Baseband module, therefore, the interruption controls module can only produce USB and insert interruption, determining to have only USB to insert according to interrupt flag bit interrupts, thereby determine that terminal is in the usb data line and inserts state, start the USB charging flow.
After computer usb data interface is extracted from the USB socket of terminal, the pin VUSB of computer usb data interface will disconnect and being connected of the slot Power of USB socket, make the signal on the pin VUSB_IN no longer be high level, thereby the interruption controls unit generation USB that triggers in the simulation baseband module extracts interruption, the Analog Baseband module according to interrupt flag bit detect USB extract interrupt being triggered after, close the USB charging flow.
Fig. 6 is terminal charger charging among the present invention, USB charging and the three-in-one method flow diagram of data communication, and concrete steps are as follows:
When step 601, terminal find to have charger or USB interface of computer to insert, enter operating state from default conditions, the terminal inner circuit is started working.
When the terminal inner circuit has just been started working, the analog switch control end by pull down resistor R2 drop-down be low level, this moment analog switch No. 0 passage conducting, No. 1 pathway closure.
Step 603 if USB inserts interruption and the charger insertion is interrupted all being triggered, determines that then terminal is in charger and inserts state, startup charger charging flow.
In this step, the standard charging device inserts the USB socket of terminal, the slot Power of the pin VCHG of standard charging device by USB socket makes the signal on the pin VUSB_IN of Analog Baseband module be changed to high level, because pin D+ in the standard charging device and D-are by short circuit, and the analog switch of this moment is in the passage conducting state No. 0, therefore, signal on the pin VCHG_DET of Analog Baseband module also is changed to high level, the interrupt control unit that high level signal on the pin VUSB_IN will trigger in the simulation baseband module produces USB insertion interruption, the interrupt control unit that high level signal on the pin VCHG_DET will trigger in the simulation baseband module produces terminal charger insertion interruption, the Analog Baseband module detects according to interrupt flag bit that USB insert to interrupt and charger inserts after interruption all is triggered, determine that terminal is in charger and inserts state, start the charger charging flow.
In addition, after the standard charging device is extracted from the USB socket of terminal, the pin VCHG of standard charging device will disconnect and being connected of the slot Power of USB socket, make the signal on pin VUSB_IN and the VCHG_DET be changed to low level, the interrupt control unit generation USB that simulates in the baseband module extracts interruption and charger is extracted interruption thereby trigger, the Analog Baseband module detects USB according to interrupt flag bit and extracts and interrupt and charger is extracted after interruption all is triggered charge closing device charging flow.
Step 604 interrupts being triggered if only there is USB to insert, and then determines to be in the usb data line and inserts state, starts the USB charging flow, and can carry out the usb data transmission simultaneously.
In this step, after computer usb data interface inserts the USB socket of terminal, the pin VBUS of computer usb data interface will make the signal of the pin VUSB_IN of Analog Baseband module be changed to high level by the slot Power of USB socket, the interrupt control unit that this high level signal triggers in the simulation baseband module produces USB insertion interruption, high level signal on the pin VUSB_IN also will provide input voltage for power control unit, digital baseband block control power control unit output+3V voltage VUSB, should+the VUSB interface output of 3V voltage VUSB by the Analog Baseband module, process pull-up resistor R1 is to analog switch channel selecting pin S, make pin S go up voltage signal and be changed to high level, thereby make No. 1 passage conducting of analog switch, No. 0 pathway closure.
No. 1 passage conducting of analog switch is connected pin D+, the D-of computer usb data interface respectively with pin USB_D+, the USB_D-of digital baseband block, carry out the usb data transmission thereby computer usb data interface is connected with the usb interface module of digital baseband block.
No. 0 pathway closure of analog switch is isolated from the outside the signal on the pin VCHG_DET of Analog Baseband module, therefore, the interruption controls module can only produce USB and insert interruption, determining to have only USB to insert according to interrupt flag bit interrupts, thereby determine that terminal is in the usb data line and inserts state, start the USB charging flow.
In addition, after computer usb data interface is extracted from the USB socket of terminal, the pin VUSB of computer usb data interface will disconnect and being connected of the slot Power of USB socket, make the signal on the pin VUSB_IN no longer be high level, thereby the interruption controls unit generation USB that triggers in the simulation baseband module extracts interruption, the Analog Baseband module according to interrupt flag bit detect USB extract interrupt being triggered after, close the USB charging flow.
The above only is preferred embodiment of the present invention, and is in order to restriction the present invention, within the spirit and principles in the present invention not all, any modification of being done, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1. the device of terminal charger charging, USB charging and data communication comprises:
Processor: comprise data-interface, first interface, second interface and the 3rd interface;
Usb interface module: comprise FPDP and power interface; Wherein, power interface is connected with second interface;
It is characterized in that, also comprise:
Select module: comprise selecting side, first switch and second switch, first switch and second switch comprise input, first output and second output respectively; Wherein, the selecting side is connected with the 3rd interface, is used to control the input of first, second switch and being connected of output; First output of first, second switch is connected with the data-interface of processor; Second output of first switch is connected with first interface, is used to trigger processor and produces the terminal charger insertion or extract interruption; Second output of second switch is connected with second interface, is used to trigger processor and produces the USB insertion or extract interruption; The input of first, second switch is connected with the FPDP of usb interface module.
2. device according to claim 1 is characterized in that, in the described selection module,
If the selecting side is a high level, then the input of first, second switch is connected with first output corresponding to this input;
If the selecting side is a low level, then the input of first, second switch is connected with second output corresponding to this input.
3. device according to claim 1 and 2 is characterized in that, described processor comprises digital baseband block and Analog Baseband module, wherein,
Digital baseband block comprises usb interface unit, and this unit comprises first data-interface and second data-interface;
The Analog Baseband module comprises first interface, second interface and the 3rd interface.
4. device according to claim 3 is characterized in that, described Analog Baseband module comprises the interruption controls unit, wherein,
First interface is connected with the interruption controls unit, is used to control the interruption controls unit and produces terminal charger insertion interruption;
Second interface is connected with the interruption controls unit, is used to control the interruption controls unit and produces terminal usb data interface insertion interruption.
5. device according to claim 3 is characterized in that, described Analog Baseband module comprises power control unit, wherein,
Second interface is connected with power control unit, and for power control unit provides input voltage, power control unit is output voltage signal under digital baseband block control, and this voltage signal is by the output of the 3rd interface.
6. the method for a terminal charger charging, USB charging and data communication is characterized in that, comprising:
A. processor detects the triggering situation that USB inserts interruption and charger insertion interruption according to interrupt flag bit;
If B. USB insertion interruption and charger insert and interrupt all being triggered, determine that then terminal is in charger insertion state, startup charger charging flow; In this step,
After the usb interface module of charger and terminal connects, FPDP short circuit with usb interface module, power interface is accepted the charger power supply, make the signal on second interface be changed to high level, because the signal on the selecting side of selection module is a low level, the input of first, second switch is connected with second output corresponding to this input, and second input of first switch is connected with first interface, second input of second switch is connected with second interface, therefore, make the signal on first interface also be changed to high level;
High level signal on first interface triggers processor and produces USB insertion interruption;
High level signal on second interface triggers processor and produces terminal charger insertion interruption;
Interrupt being triggered if C. only there is USB to insert, then determine to be in the usb data line and insert state, start the USB charging flow, and carry out the usb data transmission; In this step,
After computer usb data interface and usb interface module connect, power interface is accepted the power supply of computer usb data interface, make the signal on second interface be changed to high level, high level signal on second interface triggers processor and produces terminal charger insertion interruption, and provide input voltage for power control unit, power control unit is output voltage signal under digital baseband block control, this voltage signal is by the output of the 3rd interface, select the signal of the selecting side of module to be changed to high level, first, the input of second switch is connected with first output corresponding to this input; The data-interface that makes digital baseband block connects by the FPDP and the computer usb data interface of usb interface module, carries out the usb data transmission;
After the signal of the selecting side of selection module is changed to high level, the input disconnection of first, second switch is connected with second output corresponding to this input, make the signal on first interface be changed to low level, produce terminal charger insertion interruption thereby can not trigger processor.
7. method according to claim 6 is characterized in that, described step B also comprises:
The charger disconnection is connected with usb interface module, make the signal on first interface and second interface all be changed to low level, this low level signal triggering processor generation USB extracts interruption and terminal charger is extracted interruption, processor detects USB according to interrupt flag bit and extracts and interrupt and charger is extracted after interruption all is triggered charge closing device charging flow.
8. according to claim 6 or 7 described methods, it is characterized in that described step C also comprises:
The disconnection of usb data interface is connected with usb interface module, make the signal on second interface be changed to low level, this low level signal triggers processor and produces USB and extract interruption, processor according to interrupt flag bit detect USB extract interrupt being triggered after, close the USB charging flow.
9. method according to claim 6 is characterized in that, the described processor of step B and C is the interrupt control unit in the Analog Baseband module.
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