Arduino 简明教程
Arduino - Mouse Button Control
使用鼠标库，你可以用 Arduino Leonardo、Micro 或 Due 控制计算机屏幕上的光标。
此特定示例使用五个按钮来移动屏幕光标。四个按钮是方向性的（上、下、左、右），还有一个用于左键单击。从 Arduino 移动光标始终是相对的。每次读取输入时，光标的位置都相对于其当前位置更新。
只要按下方向按钮中的一个，Arduino 就会移动鼠标，将一个高输入映射到适当方向的 5 个范围。
第五个按钮用于控制鼠标的左键单击。释放按钮时，计算机将识别该事件。
Components Required
您将需要以下组件：
-
1 × Breadboard
-
1 × Arduino Leonardo、Micro 或 Due 电路板
-
5 × 10k 欧姆电阻
-
5 × momentary pushbuttons
Sketch
在计算机上打开 Arduino IDE 软件。使用 Arduino 语言进行编码将控制您的电路。单击“新建”以新建一个草图文件。
以下示例中，需要使用 Arduino IDE 1.6.7
Arduino Code
/*
Button Mouse Control
For Leonardo and Due boards only .Controls the mouse from
five pushbuttons on an Arduino Leonardo, Micro or Due.
Hardware:
* 5 pushbuttons attached to D2, D3, D4, D5, D6
The mouse movement is always relative. This sketch reads
four pushbuttons, and uses them to set the movement of the mouse.
WARNING: When you use the Mouse.move() command, the Arduino takes
over your mouse! Make sure you have control before you use the mouse commands.
*/
#include "Mouse.h"
// set pin numbers for the five buttons:
const int upButton = 2;
const int downButton = 3;
const int leftButton = 4;
const int rightButton = 5;
const int mouseButton = 6;
int range = 5; // output range of X or Y movement; affects movement speed
int responseDelay = 10; // response delay of the mouse, in ms
void setup() {
// initialize the buttons' inputs:
pinMode(upButton, INPUT);
pinMode(downButton, INPUT);
pinMode(leftButton, INPUT);
pinMode(rightButton, INPUT);
pinMode(mouseButton, INPUT);
// initialize mouse control:
Mouse.begin();
}
void loop() {
// read the buttons:
int upState = digitalRead(upButton);
int downState = digitalRead(downButton);
int rightState = digitalRead(rightButton);
int leftState = digitalRead(leftButton);
int clickState = digitalRead(mouseButton);
// calculate the movement distance based on the button states:
int xDistance = (leftState - rightState) * range;
int yDistance = (upState - downState) * range;
// if X or Y is non-zero, move:
if ((xDistance != 0) || (yDistance != 0)) {
Mouse.move(xDistance, yDistance, 0);
}
// if the mouse button is pressed:
if (clickState == HIGH) {
// if the mouse is not pressed, press it:
if (!Mouse.isPressed(MOUSE_LEFT)) {
Mouse.press(MOUSE_LEFT);
}
} else { // else the mouse button is not pressed:
// if the mouse is pressed, release it:
if (Mouse.isPressed(MOUSE_LEFT)) {
Mouse.release(MOUSE_LEFT);
}
}
// a delay so the mouse does not move too fast:
delay(responseDelay);
}