CN109787299A - The fast charge mode triggering method and system of universal serial bus device - Google Patents

Abstract

A kind of the fast charge mode triggering method and system of universal serial bus device.The fast charge mode triggering method of universal serial bus device, it include: after the completion of the signal procedure of universal serial bus device, the following steps: the first processing step are executed, the power switch on power end are disconnected, and the connection configuration at correction data end and negative data end is set as short circuit；Power switch on power end is closed by second processing step, and the connection configuration at correction data end and negative data end is continued to keep short circuit, and it is short-circuit configuration that downstream unit, which detects between correction data end and negative data end, at this time, then triggers fast charge mode；Third processing step continues to remain closed the power switch on power end, and the connection configuration at correction data end and negative data end is set as opening a way, to be communicated and be detected whether downstream unit is pulled out；Fourth process step disconnects the power switch on power end, and the connection configuration at correction data end and negative data end is continued to keep open circuit.

Description

Fast charging mode triggering method and system for universal serial bus device

technical field

The content disclosed in the present invention relates to a method for triggering a charging mode of a universal serial bus (USB) device, and more particularly, to a method and system for triggering a fast charging mode of a universal serial bus device.

Background technique

Universal Serial Bus (USB) is an electronic device connection interface that can support data transmission (through the positive data terminal D+ and negative data terminal D- of USB) and power supply (through the power supply terminal VBUS of USB). Hot plug, plug and play, a large number of connected devices, fast data transfer speed, support for charging functions, etc. Therefore, the USB interface has become one of the most common electronic device connection interfaces.

In the battery charging specification (BC specification) of USB, there are three types of charging: standard downstream port (SDP), charging downstream port (CDP) and dedicated charging port (dedicated). charging port, DCP). SDP is a general USB data transfer mode in form, but the maximum current it can provide is 500mA. CDP is similar to SDP, but the maximum current it can provide is 1500mA. In addition, the DCP can only be used for charging and cannot transmit data, and the maximum current it can provide can reach 1500mA. DCP is also known as fast charge mode or fast charge mode.

The charging devices currently designed for the Android system can be roughly divided into the following two modes: (1) If the charging device does not need to support data communication, the DCP charging mode of the USB BC specification is used (which can supply a larger current) , that is, the positive data terminal D+ and the negative data terminal D- are fixed (for example, short-circuited), so that the downstream device (such as a mobile phone) can identify the charging capability of the charging device; and (2) If the charging device needs to support data communication, then Using the SDP charging mode of the USB BC specification, that is, retaining the original data transmission function of the positive data terminal D+ and the negative data terminal D-. However, the states of the positive data terminal D+ and the negative data terminal D- in the above two modes are not compatible (for example, the connection configuration, resistance setting, and communication protocol are different), so most Android downstream devices are in the same Time can only support one of the above charging modes. In addition, there is no method or system for integrating the two modes or supporting the above two modes at the same time.

The details and advantages of the present invention are further described in the following Summary and Embodiments sections. However, it should be understood that the following description is only for the purpose of illustration to facilitate understanding of the present invention, rather than limiting the scope of the present invention.

SUMMARY OF THE INVENTION

The present invention is made under the above-mentioned background, and relates to a method and system for triggering a fast charging mode of a USB device to overcome the above-mentioned problems.

The inventor of the present application proposes a method and system for triggering a fast charging mode of a USB device, which can cause the downstream device to reset and enter a new operation mode by opening and closing the power switch on the USB power end for a short period of time. It can supply charging and communicate with downstream devices at the same time. In this way, under the condition of conforming to the USB BC specification, on the same USB channel, it can achieve the requirements of "supplying high current charging to downstream devices (fast charging)" and "data communication with downstream devices (triggering App)" at the same time. Function. App is an application.

In an embodiment of the present invention, a method for triggering a fast charge mode of a USB device is provided. The method includes: a standby step, closing the power switch on the power supply terminal of the USB, and making the positive data terminal and the negative data terminal of the USB open circuit, at this time, the positive data terminal and the negative data terminal are SE0 state; enumeration step, continue to keep the power switch on the power supply side closed, and make the positive data terminal and the negative data terminal open, when the downstream device is inserted into the universal serial bus, carry out the enumeration procedure of the universal serial bus, at this time the positive The data terminal and the negative data terminal are in the J state; in the communication step, the power switch on the power supply terminal is kept closed, and the positive data terminal and the negative data terminal are opened to carry out the communication procedure of the universal serial bus. At this time, the positive data In the first processing step, the power switch on the power supply terminal is disconnected, and the positive data terminal and the negative data terminal are short-circuited; in the second processing step, the power switch on the power supply terminal is closed, And continue to short-circuit the positive data terminal and the negative data terminal. At this time, the downstream device detects that the positive data terminal and the negative data terminal are in a short-circuit state, and then triggers the fast charging mode of the downstream device. The power switch is kept closed, and the positive data terminal and the negative data terminal are open to communicate and detect whether the downstream device is unplugged. At this time, the positive data terminal and the negative data terminal are in the J state; and the fourth processing step is to connect the power The power switch on the terminal is disconnected, and the positive data terminal and the negative data terminal are opened.

In other embodiments of the present invention, during the first processing step, the second processing step and the fourth processing step, the states of the positive data terminal and the negative data terminal are arbitrary states. In addition, during the communication step and the third processing step, if the positive data terminal and the negative data terminal are in the SE0 state, the process returns to the standby step. In addition, when the duration time of the fourth processing step expires, it returns to the standby step. In addition, the durations of the enumeration step, the communication step, the first processing step, the second processing step, the third processing step and the fourth processing step are respectively preset according to application requirements.

In another embodiment of the present invention, a fast charging mode triggering system of a USB device is provided. The system includes: a power converter configured to provide DC power including at least a positive power output and a negative power output; a power switch configured to turn on or off the power of the USB, including an input A terminal, an output terminal and a control terminal; and a micro-control unit, configured to execute the fast charging mode triggering method of the USB device, which at least includes a positive input/output port, a negative input/output port and a switch control port. The negative power output terminal of the power converter is connected to the ground terminal of the universal serial bus. The positive power output terminal of the power converter is connected with the input terminal of the power switch. The output end of the power switch is connected with the power end of the universal serial bus. The control terminal of the power switch is connected with the switch control port of the micro-control unit. The positive input/output port of the microcontroller unit is connected to the positive data terminal of the universal serial bus. The negative input/output port of the microcontroller unit is connected to the negative data terminal of the universal serial bus.

In other embodiments of the present invention, the power switch may be integrated into the power converter. Also, the power converter is an AC/DC converter or a DC/DC converter.

An embodiment of the present invention also provides a computer program product, wherein the computer program product includes a computer-readable recording medium, and the computer-readable recording medium is used to store a computer program, and when the computer program is loaded and executed After that, the above-mentioned method for triggering the fast charging mode of the USB device can be completed.

Description of drawings

Embodiments of the present invention will now be described in detail, by way of example and not limitation, with reference to the accompanying drawings. The features and advantages of the present invention should be better understood after reading the following detailed description and drawings.

FIG. 1 is a flowchart illustrating a method for triggering a fast charge mode of a USB device according to an embodiment of the present invention.

FIG. 2 is a timing diagram illustrating a method for triggering a fast charge mode of a USB device according to an embodiment of the present invention.

FIG. 3A is a schematic diagram of a fast charge mode trigger system of a USB device according to an embodiment of the present invention.

FIG. 3B is a schematic diagram of a fast charge mode trigger system of a USB device according to another embodiment of the present invention.

FIG. 4A is a schematic diagram showing that the connection between the positive data terminal D+ and the negative data terminal D- of the USB is configured as an open circuit.

FIG. 4B is a schematic diagram showing that the connection between the positive data terminal D+ and the negative data terminal D- of the USB is configured as a short circuit.

FIG. 4C shows a schematic diagram when both the positive data terminal D+ and the negative data terminal D- of the USB are in a single-ended zero (SE0) state.

FIG. 4D shows a schematic diagram when the states of both the positive data terminal D+ and the negative data terminal D- of the USB are in the J state.

FIG. 4E shows a schematic diagram when the power supply terminal VBUS of the USB is turned on (the power switch is closed).

FIG. 4F shows a schematic diagram when the power supply terminal VBUS of the universal serial bus is not conducting (the power switch is turned off).

Description of reference numbers:

100-quick charge mode triggering method; 102-step; 104-step; 106-step; 108-step; 110-step; 112-step; 114-step; 116-step; ;30A-Quick Charge Mode Trigger System;30B-Quick Charge Mode Trigger System;31-Micro Control Unit;33A-Power Converter;33B-Power Converter;35-Power Switch;41-Micro Control Unit;43-Power Conversion 45-power switch; 47-downstream device.

Detailed ways

First, reference is made to FIGS. 4A-4F, which illustrate schematic diagrams of various connection configurations of a Universal Serial Bus (USB) according to an embodiment of the present invention. FIG. 4A shows a situation where the micro control unit 41 (micro control unit, MCU) sets the connection configuration of the positive data terminal D+ and the negative data terminal D- as an open circuit. FIG. 4B shows the case where the micro-control unit 41 configures the connection configuration of the positive data terminal D+ and the negative data terminal D- as a short circuit.

FIG. 4C shows the situation where the micro-control unit 41 detects that the state of the positive data terminal D+ and the negative data terminal D- is the SE0 state, and no downstream device is inserted at this time. 4D shows that the micro-control unit 41 detects the state of the positive data terminal D+ and the negative data terminal D- as the J state, and the downstream device 47 (such as a mobile phone) is plugged into the universal serial bus at this time.

FIG. 4E shows that the micro-control unit 41 outputs the switch control signal EN to close the power switch 45 . In this case, the power supply terminal VBUS of the universal serial bus and the positive power output terminal VDD of the power converter 43 are turned on, so that power can be supplied to downstream devices. FIG. 4F shows that the micro-control unit 41 outputs the switch control signal EN to turn off the power switch 45 . In this case, there is no conduction between the power terminal VBUS of the USB and the positive power output terminal VDD of the power converter 43 , so that power cannot be supplied to the downstream devices.

An embodiment of the present invention relates to a method for triggering a fast charge mode of a USB device. Referring to FIG. 1 , it shows a flowchart of a method for triggering a fast charge mode of a USB device according to an embodiment of the present invention. The method 100 for triggering a fast charge mode of a USB device includes the following steps. First, in the standby step 102, the power switch on the power supply terminal VBUS of the USB is turned on, so that the power supply terminal VBUS is turned on. In addition, the connection configuration of the positive data terminal D+ and the negative data terminal D- of the universal serial bus is set as an open circuit. At this time, the states of the positive data terminal D+ and the negative data terminal D- are SE0 (single ended zero, single-ended 0) states.

Next, when the downstream device (such as a mobile phone) is inserted into the USB, the enumeration step 104 (enumeration) is entered. In this step, the power switch on the power supply terminal VBUS is kept closed, and the connection configuration of the positive data terminal D+ and the negative data terminal D- is kept open, so as to carry out the enumeration procedure of the universal serial bus. At this time, the state of the positive data terminal D+ and the negative data terminal D- is the J state, and the system is in the SDP mode.

When the enumeration procedure is completed, the communication steps are performed according to the individual system. In the case of the Apple system, the communication step 106 is performed based on, for example, the iAP2 communication protocol (iPod accessory protocol 2.0); in the case of the Android system, the communication step 108 is performed based on, for example, the AOA communication protocol (Android open accessory protocol). In this step, keep the power switch on the power supply terminal VBUS closed, and keep the connection configuration of the positive data terminal D+ and the negative data terminal D- open, so as to carry out the communication procedure of the universal serial bus. At this time, the state of the positive data terminal D+ and the negative data terminal D- is the J state, and the system is in the SDP mode. In addition, during the communication step 106 or the communication step 108, if it is detected that the state of the positive data terminal D+ and the negative data terminal D- is the SE0 state, the process returns to the standby step 102. On the other hand, it should be noted that in the case of the Apple system, the fast charging mode can be set through a communication process.

Next, when the communication procedure is completed or the predetermined time counting ends, the first processing step 110 is performed. In this step, the power switch on the power supply terminal VBUS is turned off, so that the power supply terminal VBUS is not turned on. In addition, the connection configuration of the positive data terminal D+ and the negative data terminal D- is set as a short circuit.

Then, when the predetermined time counts up, the second processing step 112 is performed. In this step, the power switch on the power supply terminal VBUS is closed, so that the power supply terminal VBUS is turned on again. In addition, continue to keep the connection configuration of the positive data terminal D+ and the negative data terminal D- short-circuited. At this time, the downstream device detects that the connection configuration between the positive data terminal D+ and the negative data terminal D- is a short circuit, thereby triggering the fast charging mode of the downstream device.

Then, when the predetermined time counts up, a third processing step 114 is performed. In this step, continue to keep the power switch on the power supply terminal VBUS closed, and set the connection configuration of the positive data terminal D+ and the negative data terminal D- as an open circuit to communicate and detect whether the downstream device is unplugged. At this time, the state of the positive data terminal D+ and the negative data terminal D- is the J state, and the system is already in the DCP mode.

Then, when it is detected that the downstream device is removed or the predetermined time expires, the fourth processing step 116 is performed. In this step, the power switch on the power supply terminal VBUS is turned off, so that the power supply terminal VBUS is not turned on. In addition, the connection configuration of the positive data terminal D+ and the negative data terminal D- is set as an open circuit. After that, when the predetermined time has elapsed, the process returns to the standby step 102 .

It should be noted that during the first processing step 110, the second processing step 112 and the fourth processing step 116, the positive data terminal D+ and the negative data terminal D- of the USB can be in any state (don't care) . In addition, during the communication step 108 and the third processing step 114 , if it is detected that the positive data terminal D+ and the negative data terminal D- are in the SE0 state, that is, the downstream device is unplugged, the process returns to the standby step 102 .

Referring now to FIG. 2 , a timing diagram of a method for triggering a fast charge mode of a USB device according to an embodiment of the present invention is shown. The various steps in the timing diagram 200 of the fast charging mode triggering method correspond to the fast charging mode triggering method 100 . In FIG. 2, the connection configuration (conducting or non-conducting) of the power supply terminal VBUS, the connection configuration (open circuit or short circuit) of the positive data terminal D+ and the negative data terminal D-, and the positive data terminal D- and the negative data terminal D- during each step are shown Signal state (SE0 or J state) on data terminal D+ and negative data terminal D-. Additionally, the duration of each step may be as follows (but is not limited to): enumeration step 104 may be less than 0.5 seconds, communication step 106 may be less than 0.5 seconds, first processing step 110 may be less than 0.5 seconds, and second processing step 112 may be less than 0.5 seconds 0.5 seconds, the third processing step 114 may be greater than 180 seconds or any time and the fourth processing step 116 may be less than 0.5 seconds. The durations of these steps can also be preset separately according to application requirements.

Another aspect of the present invention relates to a fast charge mode trigger system for a USB device. Referring to FIG. 3A , it shows a schematic diagram of a fast charge mode triggering system of a USB device according to an embodiment of the present invention. The fast charge mode trigger system 30A of the USB device may include a power converter 33A, a power switch 35 and a microcontroller unit 31 (MCU). The power converter 33A is configured to provide a DC power output, which may include at least a positive power output terminal VDD and a negative power output terminal VSS. The power switch 35 is configured to turn on or off the power of the USB, and may include an input terminal, an output terminal and a control terminal. The micro-control unit 31 is configured to execute the fast charging mode triggering method 100 of the USB device as described above, which may at least include a positive input/output port, a negative input/output port and a switch control port.

As shown, the negative power output terminal VSS of the power converter 33A is connected to the ground terminal GND of the universal serial bus. The positive power output terminal VDD of the power converter 33A is connected to the input terminal of the power switch 35 . The output terminal of the power switch 35 is connected to the power terminal VBUS of the universal serial bus. The control terminal of the power switch 35 is connected to the switch control port of the micro-control unit 31 . The positive input/output port of the microcontroller unit 31 is connected to the positive data terminal D+ of the universal serial bus. The negative input/output port of the microcontroller unit 31 is connected to the negative data terminal D- of the universal serial bus. In this way, the micro-control unit 31 can control the connection configuration (open circuit or short circuit) of the positive data terminal D+ and the negative data terminal D-, and detect the signal state (SE0 or J) on the positive data terminal D+ and the negative data terminal D- state). The micro-control unit 31 can also output a switch control signal EN to control the power switch 35 to be turned on or off, so that the power terminal VBUS is turned on or off. When the power terminal VBUS is turned on, the downstream device power can be provided.

According to another embodiment of the present invention, the power switch of the fast charging mode trigger system can also be integrated into the power converter. As shown in FIG. 3B , the power switch of the fast charging mode trigger system 30B of the USB device is integrated into the power converter 33B. Therefore, the switch control signal EN of the micro-control unit 31 is connected to the power converter 33B to control the power switch integrated in the power converter 33B, thereby determining whether the power supply terminal VBUS supplies power or not.

In addition, the power converter 33A and the power converter 33B may be AC/DC converters or DC/DC converters.

According to another aspect of the present invention, the fast charging mode trigger system 30A may also include a computer-readable recording medium (which may also be included in the micro-control unit 31 ). The computer-readable recording medium can store computer-readable program codes inside. After the micro-control unit 31 loads and executes the program code, the method 100 for triggering the fast charging mode of the USB device as described above can be completed.

Various features and advantages of the present invention should become apparent from the foregoing detailed description. The fast charge mode triggering of the USB device can be accomplished through the various implementation aspects described above. Through the above-described power switch operation, when the downstream device is plugged into the USB, the downstream device can enter the fast charging mode and communicate. Therefore, the present invention can achieve the functions of supporting the user experience of "providing fast charging or high-current charging of downstream devices" and "communicating with downstream devices" while complying with the DCP charging mode of the current USB BC specification.

While the present invention has been described in terms of several embodiments, those of ordinary skill in the relevant art will appreciate that many modifications and variations of the present invention are possible based on the above teachings. It should also be understood by those of ordinary skill in the relevant art that the present invention covers all such modifications, variations, additions, permutations and their equivalents. Therefore, the present invention is not limited to these embodiments, but includes what is encompassed by the true scope and spirit of the appended claims.

Claims (9)

1. A method for triggering a fast charging mode of a universal serial bus device, comprising: In the standby step, the power switch on the power supply terminal of the USB is closed, and the connection configuration between the positive data terminal and the negative data terminal of the USB is set to open circuit, and the positive data terminal and the The negative data terminal is SE0 state; In the enumeration step, the power switch on the power supply terminal is kept closed, and the connection configuration of the positive data terminal and the negative data terminal is kept open, when the downstream device is inserted into the universal serial bus, Carry out the enumeration procedure of the universal serial bus, at this time, the positive data terminal and the negative data terminal are in the J state; In the communication step, the power switch on the power supply terminal is kept closed, and the connection configuration of the positive data terminal and the negative data terminal is kept open, so as to carry out the communication procedure of the universal serial bus, At this moment, the positive data terminal and the negative data terminal are in the J state; The first processing step is to disconnect the power switch on the power supply terminal, and set the connection configuration of the positive data terminal and the negative data terminal as a short circuit; In the second processing step, the power switch on the power supply terminal is closed, and the connection configuration of the positive data terminal and the negative data terminal is kept short-circuited. At this time, the downstream device detects the positive data terminal. The connection between the data terminal and the negative data terminal is configured as a short circuit, and then the fast charging mode of the downstream device is triggered; The third processing step is to continue to keep the power switch on the power terminal closed, and set the connection configuration of the positive data terminal and the negative data terminal as an open circuit for communication and detection of the downstream device Whether to unplug, at this time the positive data terminal and the negative data terminal are in the J state; and In the fourth processing step, the power switch on the power supply terminal is disconnected, and the connection configuration of the positive data terminal and the negative data terminal is kept open. 2 . The fast charging mode triggering method of a USB device as claimed in claim 1 , wherein during the first processing step, the second processing step and the fourth processing step, the positive data terminal and the The negative data terminal is in any state. 3 . The fast charging mode triggering method of a USB device as claimed in claim 1 , wherein during the communication step and the third processing step, if the positive data terminal and the negative data terminal are In SE0 state, it returns to the standby step. 4. The fast charging mode triggering method of a USB device according to claim 1, wherein the enumeration step, the communication step, the first processing step, the second processing step, the third processing step and the fourth processing step The durations of the processing steps are individually preset according to application requirements. 5 . The fast charging mode triggering method of the USB device according to claim 4 , wherein when the duration of the fourth processing step expires, it returns to the standby step. 6 . 6. A fast charging mode triggering system for a universal serial bus device, comprising: a power converter, configured to provide DC power, at least including a positive power output terminal and a negative power output terminal; a power switch configured to turn on or off the power of the USB, including an input terminal, an output terminal, and a control terminal; and A microcontroller unit configured to execute the fast charging mode triggering method of the USB device according to any one of claims 1 to 5, which at least comprises a positive input/output port, a negative input/output port and a switch control port ; Wherein, the negative power output terminal of the power converter is connected to the ground terminal of the universal serial bus, and the positive power output terminal of the power converter is connected to the input terminal of the power switch, The output terminal of the power switch is connected to the power terminal of the universal serial bus, the control terminal of the power switch is connected to the switch control port of the micro-control unit, and the The positive input/output port is connected with the positive data terminal of the USB, and the negative input/output port of the microcontroller unit is connected with the negative data terminal of the USB. 7 . The fast charging mode triggering system of the USB device of claim 6 , wherein the power switch is integrated in the power converter. 8 . 8 . The fast charging mode triggering system of the USB device of claim 6 , wherein the power converter is an AC/DC converter or a DC/DC converter. 9 . 9. A computer program product, characterized in that the computer program product comprises a computer-readable recording medium, and the computer-readable recording medium is used to store a computer program, and after the computer program is loaded and executed, The method for triggering the fast charging mode of the USB device according to any one of claims 1 to 5 can be completed.