JPH0416989A - Cursor controller - Google Patents

Abstract

PURPOSE:To move a cursor smoothly by providing a circuit which increases the number of generating pulses per unit time by a signal representing the fact that the change of X-coordinate data and Y-coordinate data inputted according to the output of a comparator exceed a reference value at a pulse generation circuit. CONSTITUTION:The pulse generation circuit 1 outputs data inputted from a digitizer 20 comprising a pointing device as a data signal 101 based on a direction of travel when it is the X-coordinate data, and outputs it as a data signal 102 when it is the Y-coordinate data. The comparator 4 compares the value of a register 8 set in advance with the value of a data signal 201 outputted from an X-coordinate counter 2, and similarly, the comparator 5 compares the value of the register 8 with the value of a data signal 301 outputted from a Y-coordinate counter 3, and issues designation to increase the number of pulses to be generated for constant time to the pulse generation circuit 1 when the value of the register 8 is less than that of the signals 201 and 301. In such a way, it is possible to move the cursor smoothly in spite of the amount of travel of the pointing device.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a cursor control device for a mobile cursor pointing device (hereinafter referred to as pointing device). The present invention is used to control the movement of a cursor on a display screen of a pointing device.

〔overview〕

The present invention provides a cursor control device for a pointing device that controls cursor movement on a display screen, in which the number of pulses generated from the pointing device per fixed time is increased when the amount of movement of the pointing device in the X and Y directions is large. , when it is small, the cursor can be moved smoothly on the screen regardless of the amount of movement.

[Conventional technology]

2. Description of the Related Art Conventionally, there are mechanical or optical pointing devices that can move a cursor at relatively high speed and with high precision. In the case of the mechanical type, which is inexpensive and widely used, its structure is that the pointing device is equipped with a roller, and the amount of rotation of the roller is divided into the horizontal direction (X coordinate) and the vertical direction (Y coordinate). Some devices store relative displacement in a counter, and a host computer reads the counter value and displays a cursor on the screen.

[Problem that the invention seeks to solve]

The above-mentioned conventional pointing device has the drawback that the amount of rotation of the roller is proportional to the counter value and the amount of movement is read at regular time intervals, so it does not operate smoothly when moving the cursor large or small.

The present invention solves these problems, and aims to provide a device that can smoothly move a cursor regardless of the amount of movement of the pointing device.

[Means for solving problems]

The present invention provides a cursor control device that processes X-coordinate data and Y-coordinate data input from a pointing device and sends a display output to a display processing device. an X-coordinate counter and a Y-coordinate counter that increase and decrease the X-coordinate value and Y-coordinate value, respectively, according to the data signals;
comprising a register that commonly holds reference values for changes in X-coordinate data and Y-coordinate data, and a comparison circuit that compares the values of the X-coordinate counter and the Y-coordinate counter with the values held in this register, The pulse generation circuit includes a circuit that increases the number of pulses generated per time based on the output of the comparison circuit by a signal indicating that changes in the manually input X-coordinate data and Y-coordinate data exceed the reference values. Features.

[Effect]

It receives two data signals generated by the movement of the pointing device in the X and Y coordinates, and
The amount of movement in the coordinate direction is incremented or decremented, and the incremented or decremented value is compared with a reference value preset in the register.

Next, the comparison results are logically summed, the number of pulses generated in a certain period of time is reset according to the result, and data is received at specified time intervals.

In this way, by changing the number of pulses generated from the pointing device in a certain period of time in accordance with the amount of movement of the X and Y coordinates, the cursor can be moved smoothly regardless of the amount of movement of the pointing device. I can do it.

〔Example〕

Next, embodiments of the present invention will be described based on the drawings.

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention, and FIG. 2 is a block diagram showing the overall configuration of the embodiment of the present invention.

In the embodiment of the present invention, the cursor control device 10 connected to the digitizer 20 is connected to the CPU 30.
0, a memory 40 and a CRT 50 are connected to form the entire structure.

The cursor control device 10 includes a pulse generation circuit 1 that outputs two data signals generated one by one according to changes in X coordinate data and Y coordinate data input from a digitizer 20 constituting a pointing device, and An X-coordinate counter 2 and a Y-coordinate counter 3 that increase and decrease values and Y-coordinate values, respectively, a register 8 that commonly holds reference values for changes in X-coordinate data and Y-coordinate data, and an X-coordinate counter 2 and a Y-coordinate counter. A comparison circuit 4.5 compares the value of 3 with the value held in this register 8, an OR circuit 6 which receives the outputs from the comparison circuits 4 and 5 and performs a logical sum, and the X coordinate data. and a control device 7 that controls Y coordinate data output,
The pulse generation circuit 1 includes a circuit that increases the number of pulses generated per time based on the outputs of the comparison circuits 4 and 5 by a signal indicating that changes in the input X-coordinate data and Y-coordinate data exceed the aforementioned self-standard values. include.

The pulse generation circuit 1 receives the control signal 601 from the OR circuit 6.
manually and output data signals 101 and 102. The X-coordinate counter 2 receives a control signal 701 from the control device 7 and a data signal 101 from the pulse generation circuit 1, and outputs a data signal 201 to the control device 7. The X-coordinate counter 3 inputs a control signal 701 from the control device 7 and a data signal 102 from the pulse generation circuit 1, and outputs a data signal 301 to the control device 7.

Further, the comparison circuit 4 inputs the data signal 201 from the X-coordinate counter 2 and the data signal 801 from the register 8, and outputs the control signal 401 to the OR circuit 6. The comparison circuit 5 inputs the data signal 301 from the X-coordinate counter 3 and the data signal 802 from the register 8, and outputs the split cylinder signal 501 to the OR circuit 6.

The OR circuit 6 inputs the control signal 401 from the comparison circuit 4 and the control signal 501 from the comparison circuit 5 and outputs the control signal 601 to the pulse generation circuit 1. The control device 7 inputs the data signal 201 from the X-coordinate counter 2 and the data signal 301 from the X-coordinate counter 3, and outputs a control signal 701 to the X-coordinate counter 2 and the X-coordinate counter 3.

Next, the operation of the embodiment of the present invention configured as described above will be explained.

The pulse generation circuit 1 outputs data input manually from a digitizer 20 constituting a pointing device as a data signal 101 in the case of the X coordinate depending on the direction of movement, and outputs the data as a data signal 101 in the case of the X coordinate,
In the case of coordinates, it is output as a data signal 102. The data signals 101 and 102 are constantly incremented or decremented in the X coordinate counter 2 and the X coordinate counter 3, respectively.

Comparison circuit 4 compares the value of register 8 set in advance with
The value of the data signal 201 output from the coordinate counter 2 is compared, and if the value of the register 8 is small, the pulse generation circuit 1 is specified to increase the number of pulses generated in a certain period of time, and conversely, the value of the register 8 is If it is larger, the pulse generation circuit 1 is instructed to reduce the number of pulses generated in a certain period of time.

Similarly, the comparison circuit 5 compares the value of the register 8 with the X coordinate counter 3.
Compare the value of the data signal 301 output from The generation circuit 1 is specified to reduce the number of pulses generated in a certain period of time.

The OR circuit 6 takes the OR of the results of the comparisons made by the comparison circuits 4 and 5, and specifies the number of pulses to be generated in a certain period of time to the pulse generation circuit 1. The control device 7 receives the data signals 101 and 102 outputted from the pulse generation circuit 1 from the X coordinate counter 2 and the X coordinate counter 3, respectively, and sends out a control signal 701 every time it receives the data signals 101 and 102 from the X coordinate counter 2 and the X coordinate counter 3, respectively. Clear counter 3.

Therefore, if the digitizer 20 is moved quickly, it can receive a large number of counter values generated in a certain period of time.

〔Effect of the invention〕

As explained above, according to the present invention, by varying the number of pulses generated from the pointing device in a certain period of time, the cursor can be smoothly moved regardless of the amount of movement of the pointing device. There is.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention. FIG. 2 is a block diagram showing the overall configuration according to an embodiment of the present invention. l...Pulse generation circuit, 2...X coordinate counter, 3
... Y coordinate counter, 4.5... Comparison circuit, 6...
・OR circuit, 7...control device, death...register, 1
0... Cursor control device, 20... Digitizer, 3
0...CPU, 40...Memory, 50...CRT
, 101 , 102.201.301, . 802 . . . data signal, 401 . 601, . . . control signal.

Claims (1)

[Claims] 1. In a cursor control device that processes X-coordinate data and Y-coordinate data input from a pointing device and sends a display output to a display processing device, according to a change in the X-coordinate data and the Y-coordinate data, A pulse generation circuit that outputs two data signals generated one at a time; The pulse generating circuit includes a register that holds a common standard value of change, and a comparison circuit that compares the values of the X-coordinate counter and the Y-coordinate counter with the value held in the register, and the pulse generation circuit A cursor control device comprising a circuit that increases the number of generated pulses per time in accordance with the output of the input X-coordinate data and Y-coordinate data by a signal indicating that a change in the input X-coordinate data and Y-coordinate data exceeds the reference value.