Arduino - 鼠标按钮控制
使用鼠标库,你可以使用 Arduino Leonardo,Micro 或 Due 来控制计算机的屏幕光标。
此特定示例使用五个按钮移动屏幕上的光标。其中四个按钮是方向性的(向上,向下,向左,向右),一个用于鼠标左键单击。Arduino 的光标移动始终是相对的。每次读取输入时,光标的位置都会相对于其当前位置进行更新。
每当按下一个方向按钮时,Arduino 将移动鼠标。第 5 个按钮用于控制鼠标左键单击。释放按钮后,计算机将识别该事件。
需要的组件
你将需要以下组件 -
- 1×面包板
- 1×Arduino Leonardo,Micro 或 Due board
- 5×10k 欧姆电阻器
- 5×瞬时按钮
程序
按照电路图并连接面包板上的组件,如下图所示。
草图
在你的计算机上打开 Arduino IDE 软件。用 Arduino 语言编码将控制你的电路。单击“新建”打开新的草图文件。
对于此示例,你需要使用 Arduino IDE 1.6.7
Arduino 代码
/*
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);
}
代码注意
使用 micro-USB 线将电路板连接到计算机。按钮连接到引脚 2 至 6 的数字输入。确保使用 10k 下拉电阻。