TW201301045A - Mode detection method, USB interface system and USB host - Google Patents

Abstract

The present invention provides a universal serial bus (USB) interface system, which comprises a USB slave; and, a USB host, comprising a host port; and, a control unit, which is electrically connected to the host port and is used to detect whether the host port is connected with a USB slave; if yes, further detecting whether the maximum current of the USB slave is higher than a default preset current of USB 2.0; if yes, then the control unit will issue a command to the host port, so that the host port may proceed the data transmission with the USB slave based on a high power mode corresponding to USB 2.0 specification.

Description

Pattern detection method, universal serial bus interface system, and universal serial bus host

The invention relates to a method, a system, and a host end, in particular to a mode detecting method, a universal serial bus interface system, and a universal serial bus host.

The Universal Serial Bus was developed in 1995 by major vendors such as Intel and Microsoft to address the growing contradiction between computer peripherals and limited motherboard slots and ports. It is an external bus structure for connecting peripheral devices that are suitable for USB to the host, and is mainly used for medium-speed and low-speed peripheral devices. USB is also a communication protocol that supports data transfer between the host and USB peripherals.

USB is applied to the wireless transmission specification 802.11n has the following features:

(1) USB reduces the need for all standard devices (such as mice, modems, keyboards, and printers) to the current personal computer (PC), thus reducing the complexity of the hardware and the occupation of the device. . The entire USB system has only one flaw, using an interrupt, saving system resources.

(2) USB supports hot plug. This means that you can safely plug in and disconnect the USB device and dynamically load the driver without shutting down the PC.

(3) USB supports plug and play (PnP). When a USB device is plugged in, the computer system detects the peripheral and automatically loads the relevant driver to configure the device to work properly.

(4) USB provides flexibility in the power supply of the device. The USB interface not only provides power to devices connected to a USB hub or host via a cable, but also can be powered by a battery or other electrical device, or a combination of two power supplies, and supports energy-saving Hang up and wake mode.

(5) USB has high fault tolerance. Because the error handling and error recovery mechanisms are specified in the protocol, it is possible to identify defective devices and recover or report the erroneous data.

(6) USB2.0 USB device has two support modes, namely a normal power mode of 2T2R with a short wireless data transmission distance and a required power supply (5V/500mA), and a wireless The 2T2R high power mode in which the data transmission distance is long and the required power supply is (5V/750mA). Where 2T2R means that two antennas perform transmission (referred to as T) and reception (referred to as R).

(7) The USB3.0 specification can be backward compatible to support USB1.1 and USB2.0 specifications, and the USB3.0 specification USB port can output a maximum of (5V/900mA) mode.

As shown in FIG. 1, a conventional universal serial bus (USB) interface system 1 includes: a universal serial bus host (USB host) 10, and a universal serial bus peripheral device (USB slave) 11, assuming The universal serial bus host (USB host) 10 is a USB 3.0 specification, and the universal serial bus peripheral device (USB slave) 11 is a USB 2.0 standard and has two support modes (2T2R general power/high power). The universal serial bus host (USB host) 10 cannot detect all the support modes of the universal serial bus peripheral device (USB slave) 11, and therefore only supplies a current amount of 500 mA to supply the peripheral of the universal serial bus. The device (USB slave) 11 causes the universal serial bus peripheral device (USB slave) 11 to operate in the 2T2R general power mode according to the current amount of 500 mA, so that the universal serial bus peripheral device (USB slave) is not provided. 11 operates in the 2T2R high-power mode, and cannot operate the universal serial bus peripheral device (USB slave) 11 on a long wireless data transmission distance, resulting in the inability to effectively utilize the universal serial bus peripheral device (USB slave). The biggest benefit of 11.

Accordingly, a first object of the present invention is to provide a pattern detecting method that solves the above problems.

The mode detection method is adapted to perform wireless data transmission by a control unit, and the control unit is electrically connected to a host end interface of a universal serial bus of 2.0 or higher, and the host interface can be connected to a specification. A universal serial bus peripheral device with a universal serial bus of 2.0 or higher, and the mode detecting method includes the following steps:

(A) using the control unit to detect whether the host interface 埠 is connected to the peripheral device of the universal serial bus;

(B) if the detection result of the step (A) is YES, the control unit is used to detect whether the host interface 支援 supports the general sequence bus 3.0 specification;

(C) if the detection result of the step (B) is YES, the control unit is used to detect whether the maximum current of the peripheral device of the universal sequence bus is higher than a preset current of a universal sequence bus 2.0;

(D) If the detection result of the step (C) is YES, the control unit sends an instruction to the host interface 埠, so that the host interface 埠 is in accordance with a high power mode corresponding to the general sequence bus 2.0 specification. Data transmission is performed with the peripheral device of the universal serial bus.

A second object of the present invention is to provide a universal serial bus interface system.

The universal serial bus interface system is applied to wireless data transmission, and comprises: a universal serial bus peripheral device; a universal serial bus host, comprising: a host interface; a control unit electrically connected to the host End interface, and detecting whether the host interface is connected to the peripheral device of the universal serial bus, and if so, detecting whether the host interface supports the universal serial bus 3.0 specification, and if so, detecting further Whether the universal serial bus peripheral device supports the universal serial bus 3.0 specification, and if so, whether the maximum current of the universal serial bus peripheral device is higher than a preset current of a universal serial bus 2.0, and if so, The control unit sends an instruction to the host interface 埠, so that the host interface performs data transmission with the universal sequence bus peripheral device according to a high power mode corresponding to the universal sequence bus 2.0 specification.

A third object of the present invention is to provide a universal serial bus host.

The universal serial bus host can be connected to a universal serial bus peripheral device, and the universal serial bus host includes: a host interface; a control unit electrically connected to the host interface and detects Detecting whether the host interface is connected to the peripheral device of the universal serial bus, and if so, detecting whether the host interface supports the universal serial bus 3.0 specification, and if so, detecting the periphery of the universal serial bus Whether the device supports the universal serial bus 3.0 specification, and if so, the control unit issues an instruction to the host interface 埠, so that the host interface 一 is based on a high power mode corresponding to the universal sequence bus 2.0 specification and the universal sequence The peripheral device of the bus bar transmits data.

The above and other technical contents, features and advantages of the present invention will be apparent from the following detailed description of the preferred embodiments.

As shown in FIG. 2, the preferred embodiment of the universal serial bus (USB) interface system 2 of the present invention is applicable to wireless data transmission, and includes: a universal serial bus peripheral device with a specification of USB 2.0 or higher (USB slave) 3, and a universal serial bus host (USB host) 4 with a specification of USB 2.0 or higher.

The universal serial bus host 4 includes a host interface port 41 and a control unit 42 electrically connected to the host port interface 41.

The control unit 42 performs a mode detection method. As shown in FIG. 3, the mode detection method includes the following steps:

Step 20: The control unit 42 is used to detect whether the host interface 埠41 is connected to the universal sequence bus peripheral device 3, and if yes, proceed to step 21, otherwise, it ends.

Step 21: The control unit 42 detects whether the host interface 埠41 supports the USB3.0 specification. If yes, the process proceeds to step 22; otherwise, the process proceeds to step 2A.

Step 22: The control unit 42 is used to detect whether the maximum current of the universal serial bus peripheral device 3 is higher than a preset current of a USB 2.0. If yes, proceed to step 23; otherwise, proceed to step 2A. In this embodiment, the preset current of the USB 2.0 is 500 mA.

Step 23: The control unit 42 sends an instruction to the host interface 埠41, so that the host interface 埠41 performs data with the universal sequence bus peripheral device 3 according to the 2T2R high power mode corresponding to the USB2.0 specification. transmission.

Step 2A: The control unit 42 sends an instruction to the host interface 埠41, so that the host interface 埠41 performs data according to a 2T2R general power mode corresponding to the USB2.0 specification and the universal sequence bus peripheral device 3. transmission.

In summary, the above embodiment has the advantages of detecting the maximum current of the universal serial bus peripheral device (USB slave) 3, and enabling the universal serial bus peripheral device (USB slave) 3 to operate for a longer period of time. Wireless data transmission distance to maximize the benefits.

The above is only the preferred embodiment of the present invention, and the scope of the invention is not limited thereto, that is, the simple equivalent changes and modifications made by the scope of the invention and the description of the invention are All remain within the scope of the invention patent.

20~23. . . Detection step

2. . . Universal serial bus interface system

3. . . Universal serial bus peripheral device

4. . . Universal serial bus host

41. . . Host interface 埠

42. . . control unit

1 is a circuit diagram of a conventional universal serial bus interface system:

2 is a circuit diagram of a preferred embodiment of the universal serial bus interface system of the present invention; and

3 is a flow chart of a method for detecting a mode in the preferred embodiment.

2. . . Universal serial bus interface system

3. . . Universal serial bus peripheral device

4. . . Universal serial bus host

41. . . Host interface 埠

42. . . control unit

Claims (10)

A mode detection method is suitable for performing wireless data transmission by a control unit, and the control unit is electrically connected to a host end interface 规格 of a universal serial bus of 2.0 or higher, and the host interface 埠 can be used to connect to a specification A general-purpose serial bus peripheral device of a universal serial bus of 2.0 or more, and the mode detecting method includes the following steps: (A) using the control unit to detect whether the host-side interface is connected to the peripheral device of the universal serial bus; (B) If the detection result of the step (A) is YES, the control unit is used to detect whether the host interface 支援 supports the general sequence bus 3.0 specification; (C) if the detection result of the step (B) is Using the control unit to detect whether the maximum current of the peripheral device of the universal serial bus is higher than a preset current of a universal serial bus 2.0; and (D) if the detection result of the step (C) is yes, then The control unit sends an instruction to the host interface 埠, so that the host interface 埠 is connected to the universal sequence bus peripheral device according to a high power mode corresponding to the universal sequence bus bar specification Data transmission. According to the mode detection method described in claim 1, the method further includes the following steps: (E) if the detection result of the step (C) is no, the control unit sends an instruction to the host interface, The host end interface performs data transmission with the universal sequence bus peripheral device according to the general power mode corresponding to the universal sequence bus bar specification. A universal serial bus interface system is applied to wireless data transmission, and comprises: a universal serial bus peripheral device; a universal serial bus host, comprising: a host interface; a control unit electrically connected to the host End interface, and detecting whether the host interface is connected to the peripheral device of the universal serial bus, and if so, detecting whether the host interface supports the universal serial bus 3.0 specification, and if so, detecting further Whether the maximum current of the peripheral device of the universal serial bus is higher than a preset current of a universal serial bus 2.0, and if so, the control unit sends an instruction to the host interface, so that the host interface is connected according to the universal sequence A high power mode corresponding to the row 2.0 specification transmits data to the peripheral device of the universal serial bus. According to the universal sequence bus interface system described in claim 3, if the control unit detects that the host interface does not support the universal sequence bus 3.0 specification, the control unit issues an instruction to the host interface.埠, the host interface 进行 performs data transmission with the universal sequence bus peripheral device according to the general power mode corresponding to the universal sequence bus 2.0 specification. The general-purpose serial bus interface system according to claim 3, wherein the general-purpose serial bus peripheral device has a specification of a universal serial bus of 2.0 or more. The universal serial bus interface system according to claim 3, wherein the universal sequence bus has a preset current of 500 mA. A universal serial bus host can be connected to a universal serial bus peripheral device, and the universal serial bus host includes: a host interface; a control unit electrically connected to the host interface and detects Detecting whether the host interface is connected to the peripheral device of the universal serial bus, and if so, detecting whether the host interface supports the universal serial bus 3.0 specification, and if so, detecting the periphery of the universal serial bus Whether the device supports the universal serial bus 3.0 specification, and if so, the control unit issues an instruction to the host interface 埠, so that the host interface 一 is based on a high power mode corresponding to the universal sequence bus 2.0 specification and the universal sequence The peripheral device of the bus bar transmits data. According to the general-purpose serial bus host end described in claim 7 of the patent application, if the control unit detects that the host-side interface does not support the universal serial bus 3.0 specification, the control unit issues an instruction to the host-side interface.埠, the host interface 进行 performs data transmission with the universal sequence bus peripheral device according to the general power mode corresponding to the universal sequence bus 2.0 specification. According to the universal sequence busbar host end described in claim 7, wherein the general sequence busbar peripheral device has a specification of a universal sequence busbar 2.0 or higher. According to the general-purpose serial bus terminal of claim 7, wherein the preset current of the universal serial bus 2.0 is 500 mA.