KR19990051719A - Command input device of portable terminal and method for inputting the command - Google Patents

Abstract

The present invention relates to a command input device of a portable terminal and a command input method thereof, which can simplify an input device by inputting a command using a mechanism capable of representing points such as a pen or a finger.

Recently, the command input is mainly using a mouse or a keyboard. However, the portable terminal should be light so that the most important factor is easy to carry. For this reason, a portable terminal having a light weight and a small volume is required by inputting a command using a touch screen.

Accordingly, the present invention is composed of a touch screen, an analog-to-digital converter (ADC), a touch screen controller, and a host interface to use a position and time of the contact point of the touch screen, thereby replacing the conventional three-button mouse to input a command Can be simplified. In addition, the present invention provides a device that can be used for a portable terminal requiring miniaturization by replacing a mouse, and can be used for a device requiring miniaturization and a command input method thereof.

Description

Command input device of portable terminal and method for inputting the command

The present invention relates to a command input device of a portable terminal and a command input method thereof, which can simplify an input device by inputting a command using a mechanism capable of representing points such as a pen or a finger.

A typical computer uses a mouse or keyboard as an input device. These input devices can be conveniently and easily used as desktop input devices. However, the portable terminal should be light and simple to be portable. Therefore, carrying the mouse or the keyboard separately results in the reduction of the advantages of the portable terminal. In addition, a conventional notebook has a keyboard attached but a mouse is present separately. The average mouse uses a serial port to communicate with the host to transmit data, so it can't go beyond the speed of the serial port.

Therefore, the present invention is to solve the above problems, to remove the device of the mouse and to replace the mouse with a touch screen. In addition, the conventional mouse uses a number of components by using a serial port, the present invention is not only to increase the data transfer speed by directly connecting to the system bus, but also to reduce the components used.

In order to achieve the above object, a command input device of a portable terminal of the present invention includes a touch screen for command input in place of a mouse, an analog-digital converter for converting analog X and Y coordinate data of the touch screen into a digital signal, and A touch screen controller for storing the digital signal converted by the analog-to-digital converter, and a host interface for transmitting the X and Y coordinate data to the central processing unit according to the start signal generated from the touch screen controller. It features.

In the present invention, a command input method of a portable terminal includes a first step of initializing parameter setting to read hardware and command input data, and then checking the presence or absence of coordinate data according to whether or not the touch screen is input; The second step of checking the data until data occurs, and setting the input bit of the status register of the touch screen controller when the coordinate data is generated, converts the analog signal of the Y coordinate to a digital signal and stores it in the Y coordinate register And a third step of converting the analog signal of the X coordinate into a digital signal and storing it in the X coordinate register, setting the start bit of the status register, outputting a start signal, and transmitting data. Generate an interrupt so that the central processing unit A routine to operate and check the presence or absence of coordinate data according to the touch screen input, and return to the first step if there is no coordinate data, and return to the second step if the coordinate data exists. And a fourth step of performing a predetermined operation.

1 is a block diagram showing the configuration of a general portable terminal.

Figure 2 is a block diagram showing the configuration of a command input control apparatus according to the present invention.

3 is a flowchart illustrating a read operation of command input data according to the present invention;

4 is a flowchart showing an operation of processing input data according to the present invention;

<Description of Signs of Major Parts of Drawings>

10: command input device 101: touch screen

102: command input control unit 103: central processing unit

104: Romans 105: Ram

106: display 107: network

108: data storage device 20: analog to digital converter

30: touch screen controller 201: status register

202: X coordinate register 203: Y coordinate register

204: Scan register 205: Register selector

40: host interface 206: timing controller

207: address decoder 208: interrupt controller

Hereinafter, with reference to the accompanying drawings will be described in detail the present invention.

1 is a block diagram showing the configuration of a general portable terminal.

The portable terminal includes a central processing unit (CPU) 103 for executing a program, a ROM having a basic program for initializing setting hardware and parameters of the terminal, and preparing the application for operation. Memory (ROM) 104, RAM (Random Access Memory: RAM) 105, which is the area where the program actually operates, a display 106 that expresses the result of data or operations to the user, status, such as other terminals or servers. Touch screen 101, which is a network 107 for data transmission with external systems, a Data Storage 108 for storing applications and data, and a device 10 for command entry in place of a mouse. ) And a command input control device 102 for controlling the same.

2 is a block diagram showing the configuration of a command input control apparatus.

The configuration of the device includes an analog digital converter (ADC) 20 for converting analog X and Y coordinate data of the touch screen 101 into a digital signal, a register and register selector for storing a digitally converted signal ( And a touch screen controller 30 composed of 205. Also, an address decoder 207 for decoding an address provided by a system bus, an interrupt controller 208 for generating an interrupt by a combination of signals generated from a touch screen, and a timing controller 206 for adjusting timing of a signal generated during an operation. It is composed of a host interface 40 is composed of.

The registers in the touch screen controller 30 consist of status registers 201, X and Y coordinate registers 202 and 203, and scan registers 204, respectively. The status register 201 indicates whether the touch screen is in contact and the end of conversion, and the X and Y coordinate registers 202 and 203 store data of X and Y coordinates. The scan register 204 is a register that controls the speed of the scan to know the point of contact of the touch screen. The address decoder 207 in the host interface decodes the address of the system bus to generate a chip select signal (CS *) of the touch screen controller that can select the touch screen controller 30. The interrupt controller 208 receives a start signal generated from the touch screen controller 30 and transmits the data of the X and Y coordinate registers 202 and 203 to the main memory to the main memory. Generate an interrupt to be delivered to (103). In order to write data to a register of the touch screen controller 30, a write signal (Write *: WR *), data, and an address of a system bus are generated, and the host interface 40 receives CS *, an address for a specific register, When the timing of the previous signal is generated and the touch screen write signal (WRite Controller *: WRC *) is generated, the register selector 205 of the touch screen controller 30 operates to write data to a specific register.

The specific register read operation is similar to the write operation, and receives a read signal (Read *: RD *) instead of a write signal, and generates a touch screen read signal (Read Controller *: RDC *) from the host interface 40 to generate data of the register. Read. The method of reading the X and Y coordinates of the touch screen is to generate a start signal from the touch screen controller when a value is stored in the X and Y coordinate data of the touch screen controller 30 in the X and Y coordinate registers of the touch screen controller 30. The interrupt controller 208 of the host interface receives a start signal generated from the touch screen controller 30 and transmits the data of the X and Y coordinate registers 202 and 203 to the main memory. Generates an interrupt to be delivered to the CPU). The interrupt service routine then operates to read the data in the X and Y coordinate registers 202 and 203 of the touch screen controller. In other words, when a read signal RD * of the system bus, an address is generated, the host interface 40 receives the CS * from the address, the address for a specific register, and the previous two signals and timing by the timing controller 206. In response, the touch screen read signal RDC * is generated, and the register selector 205 of the touch screen controller is operated to read data of a specific register.

3 shows a flowchart of a read operation of command input data.

Initialization for parameter setting is performed to read hardware and command input data (301). The presence or absence of the coordinate data is checked according to the touch of the touch screen (302). If there is no coordinate data, the data is continuously checked until the data is generated. When the coordinate data is generated, the input bit of the status register of the touch screen controller is set (303), and the analog signal of the Y coordinate is converted into a digital signal (304) and stored in the Y coordinate register (305). The analog signal of the X coordinate is converted into a digital signal (306) and stored in the X coordinate register (307). The start bit of the next status register is set (308) to cause a Start signal to be generated (309). The host interface then generates an interrupt through the system bus so that the central processing unit (CPU) operates the interrupt service routine to generate the signals needed to read the data in the X and Y coordinate registers of the touch screen controller to read the X and Y coordinates ( 310). After reading the data, the presence of the data is checked again to execute the routine previously performed (311).

4 is a flowchart illustrating an operation of processing input data.

The data of the coordinate register of the touch screen controller is read and stored in the memory via the host interface, and when there is a change in data thereafter, it is represented by movement of a cursor (401, 402, 403, and 404). That is, it is the same as normal mouse movement. If it is fixed for 0.5 seconds or more without movement, the menu display operation is performed (405 and 406). The touch screen shows the menu of the point of contact. In the case of a three-button mouse, it functions as the middle button. If the fixed data is less than 0.5 seconds and no coordinate data is input, a specific icon is selected (405, 407, and 410). In the case of a three-button mouse, the left button functions. Otherwise, when other coordinate data is input (407), if the input data is fixed to less than 0.5 seconds (409 and 411) it performs a function (411). In other words, a specific program can be operated by the same function as double-clicking the left button of a 3-button mouse. If it is fixed for more than 0.5 seconds, the adjustment function is performed (409 and 412). Same as clicking the right button of a 3-button mouse. The function of adjustment is used when the selected icon is not selected or an icon not selected is selected.

As described above, according to the present invention, the portable terminal can be simply manufactured by replacing the mouse. You can also solve all the problems caused by using the mouse. In other words, since the serial port for the mouse is not required, the number of parts used can be reduced, and the portable terminal can be miniaturized, and the transmission speed is excellent.

Claims (6)

A touch screen for command entry instead of a mouse, An analog-digital converter for converting analog X and Y coordinate data of the touch screen into a digital signal; A touch screen controller for storing the digital signal converted by the analog to digital converter; And a host interface for transmitting X and Y coordinate data to the central processing unit according to the start signal generated from the touch screen controller. The method of claim 1, wherein the touch screen controller A register for storing a digital signal converted by the analog-to-digital converter, And a register selector for selecting and operating a specific register from the plurality of registers. The method of claim 2, wherein the register is A status register for indicating whether or not the touch screen is in contact with the end of conversion; An X and Y coordinate register for storing X and Y coordinate data, And a scan register for controlling the speed of the scan to know the touch point of the touch screen. The method of claim 1, wherein the host interface An address decoder for generating a chip select signal that can select the touch screen controller by decoding an address of a system bus; An interrupt controller for generating an interrupt for transferring X and Y coordinate data to a central processing unit according to a start signal generated from the touch screen controller; Command input device of a portable terminal, characterized in that it comprises a timing controller for adjusting the timing of the generated signal. A first step of initializing parameters for reading hardware and command input data and then checking the presence or absence of coordinate data according to whether or not the touch screen is input; If the coordinate data does not exist, the data is checked until the data is generated, and if the coordinate data is generated, the input bit of the status register of the touch screen controller is set, and the analog coordinate of the Y coordinate is converted into a digital signal to convert the Y coordinate register. The second step to save on, A third step of converting an analog signal of X coordinate into a digital signal and storing the result in an X coordinate register, setting a start bit of the status register, outputting a start signal, and then transmitting data; In the host interface, an interrupt is generated through a system bus to cause the central processing unit to operate an interrupt service routine, and to check the presence or absence of coordinate data according to whether the touch screen is input, and to return to the first step if there is no coordinate data. And a fourth step of performing the repeated operation by returning to the second step when the coordinate data is present. The method of claim 5, wherein the checking of the presence or absence of the coordinate data A first step of checking the presence or absence of X and Y coordinate data of the coordinate register of the touch screen controller, checking the data until data occurs if there is no data, and inputting X and Y coordinate data if the data exists; A second step of checking whether or not the cursor moves by inputting the data, and returning to the first step if there is motion, and checking contact time if the cursor does not move; A third step of performing a menu display operation when the contact time is fixed for 0.5 seconds or more, and checking the presence of X and Y coordinate data when the contact time is fixed for less than 0.5 seconds, and selecting a specific icon when the data is not input; A fourth step of performing a function when the input data is fixed to less than 0.5 seconds when the X and Y coordinate data are input as a result of the checking; And a fifth step of adjusting the input data when the input data is fixed for 0.5 seconds or more.