KR20010035905A - Method and apparatus for displaying status of operation in digital interface - Google Patents

Abstract

PURPOSE: A device and a method for displaying an operation state in a digital interface, are provided to directly confirm the contents of data or a command transmitted between digital equipments connected through the digital interface, to decide a transceiving state and an error, and to display the decided result for the confirmation of a user. CONSTITUTION: A display unit(120) displays a data transceiving state and an operation state with a digital equipment of the other party connected through digital interface. An interface unit(110) controls data transceiving with the digital equipment, and the display unit(120). In the interface unit(110), a physical layer(111) transceived data and a command to the digital equipment of the other party through the digital interface. A transaction layer(113) generates and processes the transceived data and command. A link layer(112) connects the physical layer(111) and the transaction layer(113), and confirms the data and command to control the display unit(120).

Description

Method and apparatus for displaying status of operation in digital interface

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an operation state display device and a method in a digital interface. The present invention relates to a transmission and reception state or an error of data or commands transmitted between digital devices connected and connected through a digital interface such as IEEE 1394. An apparatus and method for operating state display in a digital interface for displaying whether or not a user can be identified.

First, FIG. 1 illustrates digital devices connected and connected through a digital interface such as IEEE 1394. The digital VD (D-VCR or DVHS) 100 and the digital television (D-TV) 200 are illustrated in FIG. , Various digital devices such as a digital audio (D-Audio) 300 and a digital versatile disc (DVD) recorder / player 400 may be connected and connected through a digital interface such as IEEE 1394. Real-time data, such as video and audio, transmitted and received between digital devices connected and connected through a digital interface, such as audio, are transmitted through an isochronous channel of IEEE 1394, while commands transmitted and received between the digital devices. (Command) is transmitted through the asynchronous channel of IEEE 1394. On the other hand, the conventional proposed technique for displaying the operation state in the digital device for transmitting and receiving data and commands using the isochronous channel and the asynchronous channel as described above as follows.

First, FIG. 2 shows a partial circuit diagram of a conventional proposed operation state display device which detects a potential difference on an IEEE 1394 cable (Cable) to which digital devices are connected and displays the transmission and reception state of data and commands. The IEEE 1394 cable includes a DC power supply terminal Vp, a ground terminal Vg, a strobe receiving terminal TPB1, a data transmitting terminal TPB2, a data receiving terminal TPA1, and a strobe transmitting terminal TPA2. 2, one end of the first resistor R1 is connected to the DC power terminal Vp, and the other end thereof is connected to the anode of the first light emitting diode D1, and the cathode thereof is connected to the DC power terminal Vp. It is connected to the ground terminal (Vg), one end of the second resistor (R2) is connected to the strobe receiving terminal (TPB1), the other end is connected to one end of the fourth resistor (R4), the second resistor (R2) The third resistor (R3) is connected between the other end of the) and the data receiving terminal (TPA1). The other end of the fourth resistor (R4) is connected to the anode of the second light emitting diode (D2), the cathode of which is coupled to ground terminal (Vg). In addition, one end of a fifth resistor R5 is connected to the data transmission terminal TPB2, and the other end thereof is connected to an anode of the third light emitting diode D3, and the cathode of the third light emitting diode D3 is connected to the data transmitting terminal TBP2. A ground terminal Vg, the data receiving terminal TPA1 is connected to one end of a sixth resistor R6, and the other end thereof is connected to an anode of a fourth light emitting diode D4, and the fourth light emitting diode The cathode of D4 is connected to the ground terminal Vg.

Accordingly, when a voltage equal to or greater than a predetermined value is applied to the DC power terminal Vp, the first LED D1 emits light to indicate that power is supplied to the IEEE 1394 cable, and the second LED D2 is applied. When the common voltage between the strobe receiving terminal TPB1 and the data transmitting terminal TPB2 is equal to or higher than a predetermined voltage, for example, 1 V, the LED emits light, indicating that the digital device is connected to the counterpart digital device through an IEEE 1394 cable. The light emitting diode D3 emits light when a predetermined voltage or more is applied to the data transmission terminal TPB2, indicating that data or a command is being transmitted to the counterpart digital device, and the fourth light emitting diode D4 When the voltage of the data receiving terminal TPA1 is equal to or higher than a predetermined value, the light is emitted, indicating that the data and command transmitted from the counterpart digital device are being received.

Therefore, the power supply state, the connection connection state with the counterpart digital device, and the transmission / reception state of data or command are indicated by the potential difference applied on the IEEE 1394 cable (Cable) to which digital devices are connected and connected to the LEDs D1, D2, and D3. Through D4).

However, in the conventional proposed operation state display device, since only the potential difference applied on the IEEE 1394 cable is detected as described above, the data and command transmission / reception states between the digital devices are emitted and displayed. In the data and command transmission and reception state of the light emitting diode, a display error that causes the light emitting diode to occur frequently, as well as when there is an error in the transmission data itself, there was a problem that can not detect and determine the display.

Accordingly, the present invention was created to solve the above problems, and directly checks the contents of data or command transmitted between digital devices connected and connected through a digital interface such as IEEE 1394, and then transmits and receives. SUMMARY OF THE INVENTION An object of the present invention is to provide an operation state display apparatus and method in a digital interface for determining a status and an error and displaying the determination result so that a user can easily identify the status.

1 illustrates digital devices connected and connected through a digital interface such as IEEE 1394,

FIG. 2 shows some configurations of a conventional proposed display device for displaying data transmission / reception status in a digital interface such as IEEE 1394.

3 illustrates a configuration of an operation state display apparatus in a digital interface according to the present invention,

4 illustrates an operation status display screen in the digital interface according to the present invention;

5 is an operation flowchart showing an asynchronous packet transmission state in a digital interface according to the present invention;

6 is a flowchart illustrating an operation of indicating an isochronous packet transmission state in a digital interface according to the present invention;

7 is a flowchart illustrating an operation of detecting and displaying an asynchronous packet reception state and an error in a digital interface according to the present invention.

8 is a flowchart illustrating an operation of detecting and displaying an isochronous packet reception state and an error in a digital interface according to the present invention.

※ Explanation of code for main part of drawing

100: digital V110 110: interface unit

111: Physical Layer 112: Link Layer

113: Transaction Layer 120: Display

200: digital television 300: DVD recorder / player

400: digital audio

According to an aspect of the present invention, there is provided an operation state display apparatus of a digital interface, including: display means for displaying a data transmission / reception state and an operation state with a counterpart digital device connected and connected through a digital interface; And an interface means for controlling data transmission and reception with the digital device and the display means, wherein the interface means comprises: a physical layer for transmitting and receiving data and commands to and from a counterpart digital device through the digital interface; A processing layer configured to generate and process the transmitted and received data and commands; And a connection layer connecting to the physical layer and the processing layer and checking the data and commands to control the display means, wherein the connection layer includes a cyclic redundancy check (CRC: Cyclic) of the data and commands. Redundancy Checking) is detected by the code to determine whether the error, the display means, characterized in that for displaying the data transmission and reception state and operation state with the digital device connected and connected via the digital interface,

According to an aspect of the present invention, there is provided a method of displaying an operating state of a digital interface, the method comprising: transmitting and receiving data or commands with a counterpart digital device connected and connected through a digital interface; Distinguishing and detecting that data and a command are being transmitted and received; And three steps of displaying the detection result, wherein the second step is to detect a Cyclic Redundancy Checking (CRC) code of the data and commands to be transmitted and received and to determine whether there is an error. In the step, the detection result is displayed on an image screen.

Hereinafter, an operation state display apparatus and method in a digital interface according to the present invention will be described in detail with reference to the accompanying drawings.

First, FIG. 3 illustrates a configuration of an operation state display device in a digital interface according to the present invention. The operation state display device is a digital device such as an IEEE 1394 bus as shown in FIG. A display unit 120 for displaying a data transmission / reception state and an operation state with a counterpart digital device (not shown) connected through an interface; The interface unit 110 is connected to the IEEE 1394 bus and controls data transmission / reception with the digital device and the display means. The interface unit 110 includes data through the IEEE 1394 bus. And a physical layer 111 for transmitting and receiving a command to the counterpart digital device. A transaction layer 113 for generating and processing the transmitted and received data and commands; And a link layer 112 that connects the physical layer 111 and the processing layer 113 and checks the data and commands to control the display unit 120.

On the other hand, the display unit 120, as shown in Figure 3 (b), is installed on one side of the digital device such as digital VD (D-VCR or DVHS), display such as LED or LCD By means of means, the transmission and reception statuses (Tx, Rx), error status (Err), and power supply (Pwr) status, etc. of data and commands are distinguished and displayed so that a user can identify them. Transmitting / receiving states (iTx, iRx) of data through an isochronous channel (iTx, iRx), and sending and receiving states (aTx, aRx) of a command (Command) through an asynchronous channel can be displayed separately, and also shown in FIG. As described above, the transmission and reception states (Tx, Rx), error status (Err), power supply (Pwr) state, etc. of the data and commands are used by using a screen of a digital device such as a digital television (D-TV). May be displayed for easy identification.

The operation description in the operation state display device according to the present invention configured as described above will be described below in detail with reference to the accompanying drawings.

First, FIG. 5 is a flowchart illustrating an operation of displaying an asynchronous packet transmission state in a digital interface according to the present invention. In the connection layer 112, as shown in FIG. ) Or in the asynchronous packet transmission mode (S10) for transmitting a command packet through an asynchronous channel, when a request signal (Link Data Request) requesting data connection transmission is received from the processing layer 113 (S11), the physical layer In step S12, a physical arbitration request signal is transmitted (S12), and a signal transmitted from the physical layer 111 is a signal for allowing the physical arbitration request (Physical Arbitration Confirmation of WON). In the case (S13), the asynchronous packet transmitted from the processing layer 113 is connected to the physical layer 111 and transferred (S14), and 'aTx' of the display unit 120 is turned on (on), That the group packet is being transmitted is displayed (S15).

Subsequently, when receiving an acknowledgment packet indicating that the packet is normally transmitted and a signal indicating the end of data transmission (S16 and S17), 'aTx' of the display unit 120 is turned off. In step S18, the asynchronous packet transmission operation is completed.

6 is a flowchart illustrating an isochronous packet transmission state in a digital interface according to the present invention. In the connection layer 112, as shown in FIG. ) In the isochronous packet transmission mode (S30) for transmitting a command packet through the isochronous channel, when a signal (Cycle Start Packet) indicating the start of data transmission is received from the processing layer 113 (S31), the physical layer 111 is received. In step S32, a physical arbitration request signal is transmitted (S32), and a signal transmitted from the physical layer 111 correspondingly is a signal for allowing the physical arbitration request (Physical Arbitration Confirmation of WON). In S13, the isochronous packet transmitted from the processing layer 113 is transferred to the physical layer 111, and in addition, the iTx of the display unit 120 is turned on to turn on the isochronous packet. It is displayed (S35) that the kit is being transmitted.

Subsequently, when all data of the isochronous packet are transmitted (S36), a signal (Data End) indicating this is transmitted to the physical layer 111 (S37), and 'iTx' of the display unit 120 is turned off (OFF). (S38), indicating that the isochronous packet transmission operation is completed.

FIG. 7 is a flowchart illustrating an operation of detecting and displaying an asynchronous packet reception state and an error in a digital interface according to the present invention. In the connection layer 112, as shown in FIG. In an asynchronous packet reception mode (S50) for receiving a packet or a command packet through an asynchronous channel, a Cyclic Redundancy Checking (CRC) code of an asynchronous packet received from the physical layer 111 is detected and normalized. If it is determined whether or not (S51) and if the cyclic redundancy check (CRC) code is abnormal, it is determined that an error has occurred, and the received asynchronous signal is turned on by turning on 'Err' of the display unit 120. If an error occurs in the packet (S54), and if a reset occurs later on the IEEE 1394 bus (S55), 'Err' of the display unit 120 is turned off (OFF) to generate an asynchronous packet error. In the case of the determination (S51), when the cyclic redundancy check (CRC) code is normal, the identification information (ID) recorded in the header of the received data packet is detected. In operation S52, a comparison operation is performed to determine whether the identification information is identical to the identification information assigned to the user, and when the determination result is matched, the display unit 120 performs the reception operation for receiving the data packet and during the data packet reception time t. 'ARx' is turned on, indicating that an asynchronous packet is being received (S53).

8 is a flowchart illustrating an operation for detecting and displaying isochronous packet reception status and an error in the digital interface according to the present invention. In the connection layer 112, as shown in FIG. In the isochronous packet reception mode (S71) for receiving a packet or a command packet through an isochronous channel, a Cyclic Redundancy Checking (CRC) code of an isochronous packet received from the physical layer 111 is detected and normalized. Is determined (S72), and if the cyclic redundancy check (CRC) code is abnormal, it is determined that an error has occurred and isochronous received by turning on 'Err' of the display unit 120. If an error occurs in the packet (S76), and then a reset occurs on the IEEE 1394 bus (S77), 'Err' of the display unit 120 is turned off (OFF) to generate an isochronous packet error. When the time is released (S78) and the determination (S72) indicates that the cyclic redundancy check (CRC) code is normal, the transaction code of the received data packet is a normal value for the isochronous data block packet. In addition, it is determined whether a channel value is any normal value set in a channel receive list (S73, S74). If the channel value is a normal value, a reception operation for receiving the data packet is performed. During the data packet reception time t, 'iRx' of the display unit 120 is turned on to indicate that an isochronous packet is being received (S75).

For reference, the operation description is described based on the connection layer 112, and may be described differently when it is described based on the physical layer 111 or the processing layer 113.

The operation state display apparatus and method in the digital interface according to the present invention made as described above directly checks the contents of data (Data) or commands transmitted between digital devices connected and connected through a digital interface such as IEEE 1394. By determining whether or not an error is received, as well as a transmission / reception state, and displaying the determination result so that a user can easily identify, it is frequently generated by transmission and reception of data and commands between other digital devices unrelated to themselves. It is a very useful invention to be able to prevent the operation status display error, and also to indicate whether the error (Error) of the data packet transmitted and received.

Claims (7)

A device that operates in connection with a digital interface, Display means for displaying a data transmission and reception state and an operation state with a counterpart digital device connected and connected through a digital interface; And And interface means for controlling data transmission and reception with the digital device and the display means. The interface means, A physical layer for transmitting and receiving data and commands to and from a counterpart digital device through the digital interface; A processing layer configured to generate and process the transmitted and received data and commands; And And a connection layer connecting to the physical layer and the processing layer and checking the data and commands to control the display means. The method of claim 1, And the connection layer detects an error by detecting a Cyclic Redundancy Checking (CRC) code of the data and the command. The method of claim 2, And the display means displays an error state of the data and the command. The method of claim 1, And the display means displays a data transmission / reception state and an operation state with a counterpart digital device connected and connected through the digital interface on a video screen. Transmitting and receiving data or commands with a counterpart digital device connected and connected through a digital interface; Distinguishing and detecting that data or a command is being transmitted or received; And And displaying three steps of the detection result. The method of claim 5, In the step 2, the operation status display method of the digital interface, characterized in that whether the error is detected by detecting the Cyclic Redundancy Checking (CRC) code of the data and commands to be transmitted and received. The method of claim 5, Step 3, the operation status display method of the digital interface, characterized in that for displaying the detection result on the video screen.