CN1327324C - Control method for gradient induction mouse - Google Patents

Abstract

The present invention relates to a method for controlling a gradient induction mouse, which is composed of a sensor chip 1 and a microprocessor 2. X-Y directional balancing induction signals X (OUT) and Y (OUT) generated by the sensor chip are transferred into the end port of a timer / a timing device of the microprocessor UP2, the balancing induction signals X (OUT) and Y (OUT) are decoded by the microprocessor, and the acceleration speed in an X direction and a Y direction can be determined; thereby, the direction and the speed of the mouse movement of a screen can be controlled so that the purpose of the mouse intelligent control can be achieved. The mouse intelligent control method proposed by the present invention uses the gravity as one input vector of a balancing inductor (sensor chip) for the gravity acceleration, and the space position of the mouse on a control panel of the movable intelligent terminal can be determined through the (solidification) software calculation. Thereby, the present invention has the characteristics of simple structure, and strong operational reliability, and is the ideal movable intelligent terminal for most computer users.

Description

Tilt Sensitive Mouse Control Method

technical field

The invention relates to the field of computers, in particular to an intelligent mouse control method for a mobile intelligent terminal.

Background technique

At present, various mobile intelligent terminals, such as PDAs, are being more and more widely used in the field of electronic computers. The input of information generally relies on buttons or touch screens, but the convenient mouse input method does not meet the portability of handheld devices. requirements and are not widely used. If it is possible to realize the mouse intelligent control function and enhance its ease of use without affecting the portability of the mobile intelligent terminal, it is undoubtedly the dream of the majority of mobile intelligent terminal users. Proposing of the present invention can make this idea come true.

Contents of the invention

The purpose of the present invention is to propose a built-in balance sensing device instead of a general external scrolling mouse to realize the mouse control function without affecting the portability of the mobile smart terminal.

The present invention is mainly made up of sensor chip 1 and microprocessor 2 (as shown in Figure 1), and the X that sensor chip 1 produces, the balance induction signal X _OUT of Y direction and Y _OUT are sent to the timer/timer port of microprocessor μ P2 , the microprocessor 2 decodes the balance sensing signals X _OUT and Y _OUT to determine the acceleration in the X and Y directions, so as to control the direction and speed of the mouse movement on the screen, so as to achieve the purpose of intelligent mouse control. ADXL202E is a two-dimensional acceleration sensor chip, which can provide the digital signal of the duty cycle (that is, the ratio of pulse width to period) proportional to the acceleration in the X and Y directions as an output. The output of the working cycle can be directly input into a μP, and the μP counts the working cycle and calculates the acceleration in the X and Y directions respectively. Typical output duty cycle curves in the X and Y directions are shown in Figure 5.

Where: T1 - Width in the "on" state in the loop.

T2 - the width of the total loop. Variation range: from 0.5ms to 10ms.

Duty Cycle - The time spent in the "on" state (T1) as a proportion of the total cycle (T2).

Pulse Width - The width of the pulse in the "on" state.

Acceleration calculation formula:

Acceleration (g) = (T1/T2-50%)/(12.5%)

Here, 0g means 50% duty cycle. Scaling factor: 12.5% duty cycle/g

In the X and Y directions, the output circuit converts the analog signal into a digital signal modulated with a duty cycle, and the digital signal can be passed into a μP timer/timer port, and it is counted and decoded. The timer/timer calculates the acceleration by measuring the length of the T1, T2 signals and by the above formula: acceleration (g) = (T1/T2-50%)/(12.5%). There are many decoding methods, and the method adopted in this embodiment is (as shown in graph 6), the timer starts counting from the rising edge (Ta=0) of the X-axis, records the falling edge (Tb), and the timer starts counting on the next X-axis Stop timing when the rising edge (Tc) arrives. T1=Tb-Ta, T2=Tc-Ta. For Y-axis output, do the same (Td, Te, Tf).

The mouse intelligent control method proposed by the present invention uses gravity as an input vector of the gravity acceleration balance sensing device (sensor chip), and calculates through (solidified) software to determine the spatial position of the mouse on the control panel of the mobile intelligent terminal. When the control panel of the mobile smart terminal is parallel to the ground, the acceleration sensor is most sensitive to the inclination. Once the control panel of the mobile smart terminal is tilted, the mouse on the control panel will roll under the action of the acceleration of gravity, and the direction and speed of the mouse can be controlled by the tilt direction and the size of the tilt of the control panel. When the mouse enters a selected area, it can stay for a short time, and "confirm" after the user presses the confirm button. You can also set the mouse movement speed, stop and other functions through the software.

Description of drawings

Accompanying drawing 1 is the hardware system block diagram of the present invention.

Accompanying drawing 2 is an explanatory diagram of pin configuration of the ADXL202E chip of the embodiment.

Among them: ST-test; T2-connect R _SET , T2 is set by R _SET ; COM-common terminal; Y _OUT -Y channel duty cycle output; X _OUT -X channel duty cycle output; Y _FILT -Y channel filter pin; XF _ILT - X channel filter pin; V _DD -3V to 5.25V.

Accompanying drawing 3 is ADXL202E chip circuit diagram.

Accompanying drawing 4 is the flow chart of computing software.

Accompanying drawing 5 is the duty cycle graph of typical output in X, Y direction.

Accompanying drawing 6 is the decoding method of ADXL202E chip.

Detailed ways

The present invention will be further described below through specific examples.

The present invention adopts the ADXL202E chip of ANALOG Company as the sensor chip 1 . The chip can measure both dynamic acceleration and static acceleration. Measuring range: ±2g. The ADXL202E chip is built into the mobile intelligent terminal and connected with the microprocessor μP of the mobile intelligent terminal. The ADXL202E chip circuit is shown in Figure 3. The connection of the eight pins of the chip is as follows: V _DD is connected to a 3V to 5.25V power supply; a capacitor C _DC is connected between V _DD and COM for decoupling, and the recommended value of C _DC is 0.1μF; X _FILT and Y _FILT are respectively connected to capacitors C _X , C _Y , and the bandwidth of the low-pass filter is set by the value of C _X , C _Y ; T2 is connected to the resistor R _SET ; X _OUT and Y _OUT are the outputs in the X and Y directions respectively, and are connected to a μP The timer/timer port, μP calculates the acceleration in the X and Y directions respectively through software; ST is the test terminal.

Parameter settings in this embodiment: C _DC : a recommended value of 0.1 μF; T2: use the same total cycle width in X and Y directions. The calculation formula of T2 is as follows, and T2 is set by setting different R _SET values.

$\mathrm{<span\; class="notranslate">\; T</span>}\mathrm{<span\; class="notranslate">\; 2</span>}<span\; class="notranslate">\; =</span>\frac{{\mathrm{<span\; class="notranslate">\; R</span>}}_{\mathrm{<span\; class="notranslate">\; SET</span>}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; \&Omega;</span>}<span\; class="notranslate">\; )</span>}{\mathrm{<span\; class="notranslate">\; 125</span>}\mathrm{<span\; class="notranslate">\; M\&Omega;</span>}}$

C _X , C _Y : C _X , C _Y set the bandwidth of the low-pass filter.

R _FILT : 32kΩ typical.

Calculation software workflow:

The main workflow of the software is shown in Figure 4. First, the CPU reads the output X _OUT and Y _OUT of the sensor chip ADXL202E, calculates the acceleration in the X and Y directions and the new coordinates of the mouse in the X and Y directions, and compares the new coordinates of the mouse with the original coordinates. If there is no change, then Continue to read the output of the sensor chip ADXL202E, if there is a change, display the new position of the mouse on the screen until the user confirms and enter the corresponding process, otherwise the CPU continues to read the output of the sensor chip ADXL202E.

The beneficial effects and advantages of the present invention are that the proposed mouse intelligent control method uses gravity as an input vector of the gravitational acceleration balance sensing device (sensor chip), and calculates by (curing) software to determine the position of the mouse on the control panel of the mobile intelligent terminal. Spatial location. The mouse intelligent control method realizes the mouse intelligent control function and enhances its usability on the premise that the portability of the mobile intelligent terminal is not affected. Therefore, it has the characteristics of simple structure and strong operational reliability, and is an ideal mobile intelligent terminal for computer users.

Claims (1)

1. The tilt-sensing mouse control method is used in a mobile intelligent terminal, wherein the mobile intelligent terminal includes a sensor chip (1) and a microprocessor (2), and is characterized in that the balance sensing signal generated by the sensor chip (1) is transmitted to the microprocessor The timer/timer port of the device (2), the balance induction signal is decoded by the microprocessor (2), and the acceleration in the X and Y directions is determined, so as to control the direction and speed of the mouse movement on the screen.

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