KR20130107500A - Apparatus and method controlling usb power using for car - Google Patents

Apparatus and method controlling usb power using for car Download PDF

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Publication number
KR20130107500A
KR20130107500A KR1020120029343A KR20120029343A KR20130107500A KR 20130107500 A KR20130107500 A KR 20130107500A KR 1020120029343 A KR1020120029343 A KR 1020120029343A KR 20120029343 A KR20120029343 A KR 20120029343A KR 20130107500 A KR20130107500 A KR 20130107500A
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KR
South Korea
Prior art keywords
usb
power
vbus
supplied
interface unit
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Application number
KR1020120029343A
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Korean (ko)
Inventor
이진우
Original Assignee
현대모비스 주식회사
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Priority to KR1020120029343A priority Critical patent/KR20130107500A/en
Publication of KR20130107500A publication Critical patent/KR20130107500A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
    • B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
    • B60R16/03—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for supply of electrical power to vehicle subsystems or for
    • B60R16/033—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for supply of electrical power to vehicle subsystems or for characterised by the use of electrical cells or batteries
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/26—Power supply means, e.g. regulation thereof
    • G06F1/266—Arrangements to supply power to external peripherals either directly from the computer or under computer control, e.g. supply of power through the communication port, computer controlled power-strips

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Computer Hardware Design (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Power Sources (AREA)

Abstract

PURPOSE: A USB power control device considering the characteristics of audio, video, and navigation (AVN) for a vehicle and a method thereof stably read information stored in a USB memory by stably supplying power to the USB memory. CONSTITUTION: A USB interface part (210) performs USB communication with a USB memory stick inserted into a terminal. A control part (110) controls power supplied from a power source part (120) of a vehicle to be supplied to the USB interface part. When initial power is supplied from the power source part, driving power is supplied to the USB interface part with a lower voltage than a predetermined driving voltage during a specific time. After the specific time, the predetermined driving voltage is supplied. [Reference numerals] (110) Control part; (120) Power source part; (210) USB interface part; (300) USB memory stick

Description

Apparatus And Method Controlling USB Power Using for Car}

The present invention relates to an apparatus and method for controlling a USB power source, and more particularly, to an apparatus and method for controlling a USB power source in consideration of AVN characteristics for a vehicle.

Recently launched vehicles are equipped with various multimedia convenience devices such as various video-based driving safety devices, navigation devices, telematics devices, and when the USB memory is inserted into the multimedia connection terminal that supports the USB interface, You can play music files, video files, etc. stored in the memory.

On the other hand, since the vehicle starts state (started state, off state, etc.) changes from time to time, the power supply to the multimedia convenience device cannot be stably as in a PC.

In other words, if the vehicle is in a state before starting, the power state is unstable and the power cannot be stably supplied to the multimedia convenience device.

For example, when the vehicle is turned off and on while the USB memory is inserted (connected) into the connection terminal of the multimedia convenience device, the multimedia convenience device cannot supply power to the USB memory and cannot recognize the USB memory. Because of this, the files stored in the USB memory cannot be played.

In addition, when the connection / disconnection with the USB memory occurs frequently through the multimedia terminal, an unexpected problem may occur in the multimedia convenience device due to the USB communication error.

The present invention has been made in view of the above-mentioned problems, and in consideration of the characteristics of the vehicle AVN, a USB power control device considering the characteristics of the vehicle AVN to stably read information stored in the USB memory by supplying power to the USB interface stably; The purpose is to provide a method.

In order to achieve the above object, in accordance with an aspect of the present invention, a USB power control device in consideration of the AVN characteristics for a vehicle includes a USB interface unit for USB communication with a USB memory stick inserted into a terminal; And supplying power supplied from a power supply unit of the vehicle to the USB interface unit. When initial power is supplied from the power supply unit, driving power is lower than the predetermined driving voltage VBUS for a specific time (V low). And a control unit to supply the predetermined driving voltage VBUS after a specific time elapses.

According to another aspect of the present invention, a USB power control method for supplying driving power to a USB memory stick inserted into a terminal and a USB interface for performing USB communication may include driving power supplied to the USB interface unit when initial power is supplied from the vehicle power unit. Supplying a voltage V low lower than a predetermined driving voltage VBUS for a specific time; And causing a driving power to be supplied to a predetermined driving voltage VBUS after the specific time elapses.

According to the present invention, a commercially available USB memory can be stably operated in a multimedia convenience device of a vehicle.

Power supply to the USB memory can be stable, allowing users to use the information stored in the USB memory more conveniently.

1 is a block diagram illustrating a USB power control device in consideration of the AVN characteristics for a vehicle according to an embodiment of the present invention.
2 is a diagram for explaining USB communication.
3 is a diagram for explaining an application operation of an AVN.

Advantages and features of the present invention and methods for achieving them will be apparent with reference to the embodiments described below in detail with the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. And is intended to enable a person skilled in the art to readily understand the scope of the invention, and the invention is defined by the claims. It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. In the present specification, the singular form includes plural forms unless otherwise specified in the specification. It is noted that " comprises, " or "comprising," as used herein, means the presence or absence of one or more other components, steps, operations, and / Do not exclude the addition.

Hereinafter, a USB power supply control apparatus considering a vehicle AVN characteristic according to an embodiment of the present invention will be described with reference to FIGS. 1 to 3. 1 is a block diagram illustrating a USB power supply control device in consideration of a vehicle AVN characteristic according to an embodiment of the present invention, Figure 2 is a view for explaining the USB communication, Figure 3 is for explaining the operation of the application Drawing.

As shown in FIG. 1, the USB power control device 100 considering the vehicle AVN characteristics of the present invention includes a control unit 110, a power supply unit 120, an AVN 200, and a USB interface unit 210.

The controller 110 supplies the driving power to the USB interface unit 210 through the AVN 200 when the initial power is supplied from the power supply unit 120, but the driving power is lower than the predetermined driving voltage VBUS for a specific time. It is supplied at (V low ), and after a certain time, it is supplied to the preset drive voltage (VBUS) again.

For example, surge is included in an initial power source such as start-up supplied from the power supply unit 120, and when the initial power is applied to the USB interface unit 210 through the AVN 200, a terminal of the USB interface unit 210 is provided. The controller of the USB memory stick 300 connected to is affected by surge and thus abnormally operates such as repeating operation and stop.

Therefore, in order to prevent the influence of surge during initial power supply, when the initial power is supplied from the power supply unit 120, the driving power is preset to the USB interface unit 210 through the AVN 200 for a predetermined time. drive voltage predetermined excitation voltage (VBUS), a lower voltage (V low, the voltage of as much as not be affected by the surge) supply to lower the voltage of the power supply from the power supply section 120 is delivered to a, and huen certain age again ( VBUS) raises and lowers the lowered voltage to be supplied to VBUS).

By doing so, even if the initial unstable power of the vehicle is applied to the USB interface unit 210 through the AVN 200, the USB memory stick 300 connected to the terminal can operate normally without the impact of surge.

In addition, when the USB memory stick 300 is connected to the terminal, the USB interface unit 210 performs USB communication with the USB memory stick 300, and when a failure occurs in the USB communication due to static electricity or other causes, the controller 110 The driving power is supplied to the USB interface 210 with a voltage V low lower than the predetermined driving voltage VBUS, and the driving power is supplied with the predetermined driving voltage VBUS again.

For example, the terminal of the USB interface unit 210 is exposed to the outside, and thus is vulnerable to static electricity. For this reason, while the AVN 200 is playing a music file or a video file stored in the USB memory stick 300 connected to the terminal, the static electricity is discharged from the USB line, that is, the connection line between the USB interface unit 210 and the USB memory stick 300. If other error occurs, the USB communication between the USB interface unit 210 and the USB memory stick 300 may be abnormal, and music playback may stop completely or a video playback problem may occur.

On the other hand, as shown in Figure 2, USB communication by connecting the USB memory stick to the terminal is by the SCSI command of USB Mass Storage Class communication.

When the USB memory stick 300 is inserted into the terminal, the USB interface unit 210 starts USB communication with the USB memory stick 300 (S200), and performs USB communication with a SCSI command (S201).

If an external input such as surge occurs, USB communication may fail.The USB communication error reference value for checking whether or not the USB communication error occurs due to surge is preset, and the USB communication error reference value is confirmed by checking the preset USB communication error reference value. If it is confirmed that the normal (S202), and as a result, if there is no failure in the USB communication, that is, if normal, the USB communication is normally completed (S203).

However, as a result of the check, if the failure in the USB communication, confirm whether or not the failure in the USB communication for a predetermined specific time (S204), and if the failure is not persisted for a predetermined specific time, return to step S201 Continue until USB communication is completed normally with SCSI Command.

However, as a result of the check, if the fault persists for a predetermined time, the controller 110 sets the driving power to be supplied to the USB interface unit 210 through the AVN 200 to a voltage lower than the predetermined driving voltage VBUS (V low). And lowers the voltage of the power supplied from the power supply unit 120 to be supplied to the power supply unit 120, and raises the lowered voltage to be supplied to the predetermined driving voltage VBUS again (S205).

That is, the controller 110 allows the driving power to be transmitted to the USB interface unit 210 to be supplied at a voltage V low lower than the driving voltage VBUS, and is then raised to the driving voltage VBUS to be transferred. It operates from this enumeration stage, that is, it starts smoothly by starting again from the initial operation.

In addition, when the application of the AVN 200 detects an abnormality (data error) of the USB memory stick 300 when playing a file stored in the USB memory stick 300, the application of the USB driver may restart USB communication from the enumeration step. The driving voltage VBUS of the driving power to be transmitted to the USB interface unit 210 is converted by utilizing the IOCTL function.

For example, as shown in FIG. 3, in order to provide music or video to a user, an application of the AVN 200 plays a file stored in the USB memory stick 300 (S300), and the USB memory stick 300 during file playback. If a data error is detected (S301), a request is made to the USB driver (S302), that is, a VBUS IOCTL, which is in charge of the IOCTL function of the USB driver, is called to drive the USB interface unit 210 through the AVN 200. The voltage V low is lower than the predetermined driving voltage V BUS and the voltage is supplied again to the predetermined driving voltage V BUS.

USB driver up to the USB interface unit 210, the driving voltage (VBUS), a lower voltage (V low), back to the drive voltage (VBUS), and supplying a driving power to the request of the operation is performed in (S303) an application tray ( S304) allows the USB communication to operate smoothly from the Enumeration stage, that is, start again from the initial operation.

As described above, the USB communication, that is, the USB communication between the USB interface unit 210 and the USB memory stick 300 can be restarted from the enumeration step, so that the AVN 200 plays back files stored in the USB memory stick 300. Prevents an application from completely stopping or crashing.

Further, by making the supply down to when the detachment USB memory stick 300 is connected to the terminal, the USB interface unit 210, a low voltage (V low), the driving power than the drive voltage (VBUS) of the USB interface unit 210 , To prevent unstable operation.

For example, since the terminal of the USB interface unit 210 is exposed to the outside, the USB memory stick 300 can be frequently inserted or removed at a high speed by the user. In this case, the USB interface unit 210 may stop the operation, and unexpected problems may occur in the AVN 200.

To prevent this, when the USB memory stick 300 is pulled out from the terminal, the driving power is supplied to the USB interface unit 210 at a voltage V low lower than the driving voltage VBUS, and the voltage V lowered. Low to be supplied back to the driving voltage (VBUS), even if the USB memory stick 300 is frequently inserted or removed at high speed by the user, the effect is slowly inserted and pulled out, so that the USB interface unit 210 is more stable. ) Allows USB communication with the USB memory stick 300.

Although the configuration of the present invention has been described in detail with reference to the preferred embodiments and the accompanying drawings, this is only an example, and various modifications are possible within the scope without departing from the spirit of the present invention. Therefore, the scope of the present invention should not be limited by the illustrated embodiments, but should be determined by the scope of the appended claims and equivalents thereof.

110: control unit 120: power unit
200: AVN 210: USB interface unit
300: USB memory stick

Claims (6)

A USB interface unit for performing USB communication with a USB memory stick inserted into the terminal; And
The power supplied from the power supply unit of the vehicle is supplied to the USB interface unit. When the initial power is supplied from the power supply unit, the driving power is lower than the predetermined driving voltage VBUS for a specific time period (V low ). Control unit to supply to the pre-set drive voltage (VBUS) after a specific time elapsed
USB power control device comprising a. The method of claim 1,
The controller may determine whether the USB communication is normal based on a preset USB communication failure reference value that may determine whether or not the USB communication has failed, or the USB memory stick is removed from the terminal. In this case, the driving power is supplied to the USB interface unit at a voltage V low lower than the predetermined driving voltage VBUS, and then to the predetermined driving voltage VBUS.
USB power control device. The method of claim 1,
Under the control of the controller, a data error of the USB memory stick was found while supplying driving power to the USB interface unit and executing an application to play music or video to the user to play data stored in the USB memory stick. When the VBUS IOCTL, which is in charge of the IOCTL function of the USB driver, is called, the driving power is supplied to the USB interface unit at a lower voltage (V low ) than the predetermined driving voltage (VBUS) through the VBUS IOCTL. The USB power control device further comprising an AVN for supplying a driving voltage (VBUS). In the USB power control method for supplying the driving power to the USB interface stick for USB communication with the USB memory stick inserted into the terminal,
When the initial power is supplied from the power supply unit of the vehicle, driving power to the USB interface unit at a voltage V low lower than a predetermined driving voltage VBUS for a specific time; And
After the specific time elapses, driving power is supplied to a predetermined driving voltage VBUS to the USB interface unit.
USB power control method comprising a. 5. The method of claim 4,
Based on a preset USB communication failure reference value, when the USB communication is normal by determining whether the USB communication is normal or when the USB memory stick is removed from the terminal, the driving power is preset in the USB interface unit. Supplying a voltage V low lower than the driving voltage VBUS; And
Driving power to be supplied to the USB interface unit again with a preset driving voltage (VBUS);
USB power control method comprising more. 5. The method of claim 4,
If the AVN mounted on the vehicle detects a data error of the USB memory stick while executing an application to play music or video to provide the user with data stored on the USB memory stick, VBUS responsible for the IOCTL function of the USB driver. Calling an IOCTL;
Supplying driving power to the USB interface unit through the VBUS IOCTL at a voltage V low lower than a predetermined driving voltage VBUS; And
Supplying driving power back to a predetermined driving voltage VBUS through the VBUS IOCTL;
USB power control method comprising more.
KR1020120029343A 2012-03-22 2012-03-22 Apparatus and method controlling usb power using for car KR20130107500A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101491382B1 (en) * 2013-12-27 2015-02-06 현대자동차주식회사 Integrated multimedia terminal system and control method of the same

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101491382B1 (en) * 2013-12-27 2015-02-06 현대자동차주식회사 Integrated multimedia terminal system and control method of the same
US9952994B2 (en) 2013-12-27 2018-04-24 Hyundai Motor Company Integrated multimedia terminal system and control method thereof

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