JPH08180002A - Display data transmitter and data display system - Google Patents

Abstract

PURPOSE: To provide a data display system in which the transmission time of display data is short. CONSTITUTION: Plural respective display data for constituting a display screen for touch key input to be displayed on a liquid crystal TKB 2 which is a data display device are transmitted altogether from a computer 1 which is the display data transmitter. Thus, the number of times of transmission is reduced and the transmission time is shortened.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display data transmitting apparatus and a data display system, and more particularly to a display data transmitting apparatus and a display data transmitting apparatus for transmitting respective display data constituting a display screen for touch key input to be displayed on the data display apparatus. A data display system including a device.

[0002]

2. Description of the Related Art Generally, a liquid crystal touch keyboard (Tou
ch Key Board (hereinafter abbreviated as TKB) has display data of a keyboard screen to be displayed on the liquid crystal display screen. However, the display data of the keyboard screen originally provided as standard is for the keyboard of Kana characters and alphabet characters. Therefore, when the user wants to display an arbitrary keyboard screen on the liquid crystal display screen, it is necessary to transmit display data from the main body side of the computer or the like to the liquid crystal TKB.

The display data to be transmitted includes a command (command) for displaying the shape of the key, a character (character, symbol, etc.) to be displayed on the key top, and the position of the display screen on which the key is to be displayed. (Coordinates, etc.). Then, display data was created for each key and transmitted from the main body side of the computer or the like to the liquid crystal TKB.

As described above, by transmitting the display data to the liquid crystal TKB, an arbitrary keyboard screen can be displayed on the liquid crystal display screen, and various data input operations can be performed easily and efficiently. is there.

The display data about the keyboard screen transmitted from the main body of the computer or the like is the liquid crystal TK.
It is stored in the memory on the B side.

[0006]

In the above-mentioned conventional data display system, when the display data is transmitted, 1
Only the display data for one key can be transmitted in one transmission. Therefore, in order to transmit the display data to be displayed on the entire liquid crystal display screen of the liquid crystal TKB, the number of transmissions increases, and in some cases about 10,000 transmissions are required, which requires a very long transmission time. There was a flaw.

Japanese Laid-Open Patent Publication No. 2-23437 prevents the retransfer of data and cannot solve the above drawbacks. Further, Japanese Patent Laid-Open No. 2-128216 does not assume a display screen for touch key input,
The above drawbacks cannot be resolved.

The present invention has been made to solve the above-mentioned drawbacks of the prior art, and an object thereof is to provide a display data transmitting apparatus and a data display system in which display data transmission time is short.

[0009]

A display data transmitting device according to the present invention is a display data transmitting device for transmitting respective display data constituting a display screen for touch key input to be displayed on a data display device, It is characterized by having a transmission control means for transmitting a plurality of display data collectively.

A data display system according to the present invention includes a data display device and a display data transmission device for transmitting each display data constituting a display screen for touch key input to be displayed on the data display device. Wherein the display data transmitting device has a transmission control means for transmitting a plurality of the display data collectively, and the data display device has an error in a plurality of display data transmitted from the display data transmitting device. It is characterized by further comprising status information transmitting means for transmitting status information for specifying the display data having the error to the display data transmitting device.

[0011]

A plurality of pieces of display data forming a display screen for touch key input to be displayed on the data display device are collectively transmitted from the display data transmission device. When an error occurs in the plurality of transmitted display data, the data display device transmits status information for specifying the display data in which the error has occurred to the display data transmitting device.

[0012]

Next, the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of an embodiment of a data display system according to the present invention. In the figure,
A data display system according to an embodiment of the present invention includes a computer 1 for transmitting display data and a liquid crystal TKB 2 for receiving the transmitted display data and displaying the liquid crystal display screen.
Both are configured to perform transmission / reception by an RS232C serial interface (not shown).

The computer 1 is a device for transmitting each display data constituting a display screen for touch key input to be displayed on the liquid crystal TKB 2 which is a data display device, and has a function of transmitting a plurality of display data collectively. Is.
That is, the transmission time is shortened by collectively transmitting a plurality of pieces of display data that were conventionally transmitted one by one. More specifically, by transmitting a plurality of display data collectively, the time for the handshake performed at the time of transmission is reduced, thereby shortening the transmission time.

In order to realize such a function, the computer 1 responds to the command transmission command 100 to generate a transmission command which is display data, and a transmission command generation unit 10
And a command combining unit 11 for combining a plurality of the created commands, and a transmission / reception unit 12 for transmitting the combined compound command to the TKB 2.

The TKB 2 includes a transmission / reception unit 15 for receiving the composite command, and the composite command received by the transmission / reception unit 15 is sent to each unit in the TKB 2.

The command created by the send command creating unit 10 and the composite command combined by the command combining unit 11 will be described with reference to FIGS. 2 and 3.

FIG. 2 is a diagram showing the contents of the command created by the send command creating section 10. In the figure, the command 20 is STX (Start of Text) 21 indicating that it is the start portion of the command, and ETX (End of End) indicating that it is the end portion of the command.
Text) 24 and BCC for parity check
(Block Check Character) 25
It is comprised including.

A command 22 for displaying the shape of the key and command additional data 23 indicating a character to be displayed on the key top, a position to display the key, and the like are present in the portion sandwiched between them. are doing.

The command having such a structure is created for each key in the send command creating section 10. The created commands are then combined as shown in FIG.

FIG. 3 is a diagram showing the contents of the composite command combined by the command combining unit 11, and the same parts as those of FIG. 2 are indicated by the same reference numerals. In the figure, like the command 20 in FIG. 2, the composite command 3 includes an STX 21 indicating the start part of the command, an ETX 24 indicating the end part of the command, and a BCC 25 for parity check. Has been done.

A composite command flag 30 indicating that the command is a composite command is provided in the portion sandwiched between them. Then, following this flag 30, there are a plurality of commands and command additional data. That is, the command 22-1 and the command additional data 23-1, the command 22-2 and the command additional data 23-2, ... Are present, and a plurality of commands are combined.

Generally, when a plurality of commands are combined, the delimiter between the original commands becomes unknown, and the liquid crystal TKB side that receives this composite command cannot correctly recognize each command. Therefore, in the composite command 3, the ET that becomes a flag indicating a break is provided in the original break of each command.
B (End of Transmission Blo
ck) exists. That is, when this ETB exists, it indicates that the commands are continuous.

Since this ETB is provided,
Each command can be correctly recognized on the liquid crystal TKB side that has received the command.

Next, the command creating process in the send command creating unit 10 and the command combining process in the command combining unit 11 will be described with reference to the drawings.

FIG. 4 is a flow chart showing the procedure of command generation processing in the transmission command generation section 10.

First, command data, which is display data, is created in response to the command transmission command 100 (step 41). This command data is the command 22 described above.
And command additional data 23.

Next, the above STX is added to the beginning (start portion) of this command data, and the above ETX is added to the end (end portion) of this command data (step 42).

After these are added, the above-mentioned B
The CC is added (step 43), and the command creation process ends (step 44).

On the other hand, FIG. 5 is a flow chart showing a command combining process procedure in the command combining unit 11.

First, from the command data of FIG. 2, STX,
ETX and BCC are removed to create command data to be combined (step 51). Then, STX is added to the beginning (start portion) of the data, and then a flag indicating that it is a compound command is added (step 52).

Next, ETB is added to indicate that the command data is continuous unless the data ends (step 5).
3 → 54), and the next command data is created (step 55). The process of adding the ETB is continued until the end of the data (steps 55 → 53 → 54 ...).

When the data is the end, for example, when the maximum number of commands that can be combined is reached, ETX is added to the end (end portion) of the data (step 53 → 56). Finally, the BCC is added (step 57), and the command creation process ends (step 58).

By the above procedure, the composite command 3 shown in FIG. 3 is created, and this composite command is transmitted from the computer to the liquid crystal TKB. As a result, by transmitting a plurality of each display data collectively,
The number of transmissions can be reduced and the transmission time can be shortened. Since the ETB as a flag is provided at the delimiter of each command in the composite command 3, each command can be correctly recognized on the liquid crystal TKB side that receives this command.

In the above, the serial interface RS is well known as the interface between the computer and the liquid crystal TKB.
The case of 232C has been described. Although it takes a very long transmission time to transmit long data through the serial interface, the transmission time can be shortened by transmitting a plurality of data in a batch like this example. This effect of shortening the transmission time also occurs when the parallel interface is used, and the interface between the computer and the liquid crystal TKB is well known S.
CSI (Small Computer System)
It is clear that the same effect can be obtained even in the case of Interface) or the like.

By the way, when an error occurs in the transmitted composite command, it is necessary to identify the occurrence location and analyze the cause.

In the conventional data display system, each command is transmitted separately, so that the location of the error can be easily specified. In the system of this example, when a plurality of commands are combined, an ETB that serves as a flag is added to the delimiter of each command, so that the error occurrence location can be specified by referring to this ETB.

In the system of this example, the TKB side detects an error occurring in the transmission data, and the computer side is notified of the error detection. In response to this notification, the status is requested from the computer side, the location of the error is identified by the acquired status, and the cause of the error is analyzed.

The above status request processing will be described again with reference to FIG. In the figure, the computer 1 is provided with a status request unit 13 that creates a status read command in response to a status request command 130 when an error is detected in the liquid crystal TKB 2. It is transmitted to the TKB2 side.

Further, the liquid crystal TKB 2 comprises a transmission / reception section 15 for receiving a command from the computer 1 and transmitting status information, and a status information preparation section 14 for preparing status information in response to the reception of the status read command. Has been done.

The contents of the status read command will be described with reference to FIG. In the figure, the status read command 60 includes an STX 61 indicating that the command "S" 62 is the start portion of the command, and an ETX 63 and BCC 6 indicating that it is the end portion of the command.
It is sandwiched between 4 and. Command "S" 62
Indicates that it is a status read command. The data length of STX61 is 02H (Hexad
data length of the ETX 63 is 03H, and the data length of the command “S” 62 is 53H.

The status read command 60 is
It is created by the procedure shown in FIG. 7 and transmitted to the liquid crystal TKB2 side.

First, when an error is detected in the liquid crystal TKB2, in response to the status request command 130, the status request unit 13 creates a status read command in the format of FIG. 6 (step 71). Next, the created status read command is transmitted to the liquid crystal TKB2 by the transmitting / receiving unit 12 (step 72). By sending this status read command, the liquid crystal TKB
The transmission / reception unit 15 in 2 receives this command, and the status information creation unit 14 creates status information.

The status information created by the status information creating section 14 will be described with reference to FIG. In the figure, the status information 80 includes an STX 81 indicating the start portion of the command, an ETX 86 indicating the end portion of the command, and a BCC 87 for parity check.

A command "S" 82 indicating a status acquisition command is provided in the portion sandwiched between them. Then, following this command "S" 82, an error information code 83 indicating the type of error and other error information 84 are also provided.
Further, command number information 85 indicating the position of the error in the composite command, that is, the error occurrence position in the composite command is also provided.

Here, the command number information 85 can be easily obtained by referring to each ETB in the composite command 3 described above. For example, by counting this ETB, the command in which an error has occurred can be specified, and the command number is added as the command number information 85.

The data length of STX61 is 02H, E
The data length of the TX 63 is 03H, and the data length of the command “S” 62 is 53H. Other error information includes, for example, battery information indicating the voltage state of the memory backup battery of the liquid crystal TKB, RO in the liquid crystal TKB.
The revision and version information of M is included, but the problem here is the error that occurs during command transmission, and other error information is not directly related.

By transmitting the status command thus created to the computer 1 side by the transmission / reception section 15, it becomes easy for the computer side to identify the location of the error and analyze the cause.

Next, the error detection process in the liquid crystal TKB and the process on the computer side at the time of error detection will be described with reference to FIG.

First, the transmitter / receiver unit 15 on the TKB side receives the composite command sent from the transmitter / receiver unit 12 on the computer side (step 90), and logically checks the first command (step 91).

As a result, if the first command is not normal, the response signal NAK indicating that the command is incorrect
(Negative Acknowledge) is returned to the computer (step 95). This response signal NA
Upon receipt of K, the computer side immediately stops the processing (step 96), and performs the above-mentioned processing of FIG. 7 in order to acquire the above-mentioned error information code and information such as the occurrence position thereof (step 97).

If the first command is normal, then ET
It is determined whether X exists, that is, whether the command has ended (step 93), and the logical check of the next command is performed until the command ends (step 94).

Thereafter, a logical check is similarly performed (steps 94 → 92 ...), and if the command is not normal, processing for returning the response signal NAK to the computer side is performed (steps 92 → 95 → 96 ...).

Next, if ETX exists, that is, if the command has ended, a final logic check is performed (step 93 → 98). As a result, if there is no error, a response signal ACK (Ack
Nowledge) is returned to the computer (steps 98 → 99). If there is an error, the response signal NAK
Is returned to the computer side (step 98 → 9)
5 ...).

As described above, the transmission time of the display data can be shortened by transmitting a plurality of pieces of each display data constituting the display screen for touch key input to be displayed on the liquid crystal TKB data display device. Of. Further, when an error occurs in a plurality of transmitted display data, by transmitting status information for specifying the display data in which the error has occurred, it is possible to easily analyze the cause of the error. .

In the above embodiments, the case where the data display device is the liquid crystal TKB has been described, but the present invention is not limited to this, and the present invention can be applied to a data display system having various touch key input display screens. It's obvious.

[0057]

As described above, the present invention has an effect that the number of times of transmission can be reduced and the transmission time can be shortened by transmitting a plurality of pieces of display data constituting the display screen for touch key input. . In addition, when an error occurs in multiple transmitted display data, status information for identifying the display data in which the error occurred can be transmitted to clarify the location of the error and easily analyze the cause of the error. There is an effect that can be.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a data display system according to an embodiment of the present invention.

FIG. 2 is a diagram showing the contents of a command to be originally transmitted from the data display system.

FIG. 3 is a diagram showing the contents of a composite command transmitted in the data display system of FIG.

FIG. 4 is a flowchart showing a data creation processing procedure.

FIG. 5 is a flowchart showing a data combination processing procedure.

FIG. 6 is a diagram showing the contents of a status read command.

FIG. 7 is a flowchart showing a transmission processing procedure of a status read command.

FIG. 8 is a diagram showing the contents of a status acquisition command.

FIG. 9 is a flowchart showing a reception processing procedure of a composite command.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 computer 2 liquid crystal TKB 3 composite command 10 transmission command creation section 11 command combination section 12, 15 transmission / reception section 13 status request section 14 status information creation section 20 command

Claims (5)

[Claims] 1. A display data transmitting device for transmitting each display data constituting a display screen for touch key input to be displayed on a data display device, comprising a transmission control means for collectively transmitting a plurality of the display data. A display data transmitting device characterized by the above. 2. The display data transmitting apparatus according to claim 1, wherein the transmission control means adds a division flag indicating a division of the data to each of the plurality of display data to be collectively transmitted, and transmits the display data. 3. A data display system comprising: a data display device; and a display data transmission device for transmitting each display data constituting a display screen for touch key input to be displayed on the data display device, the display comprising: The data transmission device has a transmission control means for collectively transmitting the plurality of display data, and when the data display device has an error in a plurality of display data transmitted from the display data transmission device, the display in which the error has occurred A data display system comprising status information transmitting means for transmitting status information for specifying data to the display data transmitting device. 4. The data display system according to claim 1, wherein the transmission control means adds a delimiter flag indicating a delimiter of data to each of the plurality of display data to be collectively transmitted, and transmits the display data. 5. The status information transmitting means uses the position information for identifying the display data in which the error has occurred among the plurality of display data transmitted from the display data transmitting device according to the division flag, as the status information. The data display system according to claim 4, wherein the data is transmitted as information.