简单diy 一个键盘

硬件准备

使用arduino micro ,支持usb hid ,或直接使用atmega32u4 avr 芯片。

按钮若干

代码基础

使用arduino ide 进行编码。

这里需要使用Keyboard.h 这个库。

关键函数:

Keyboard.press 按下某键 Keyboard.release 释放某键

示例代码

官方示例,用来实现各个平台的锁屏这个功能,可以实现,一键锁屏等

/*
  Keyboard logout

  This sketch demonstrates the Keyboard library.

  When you connect pin 2 to ground, it performs a logout.
  It uses keyboard combinations to do this, as follows:

  On Windows, CTRL-ALT-DEL followed by ALT-l
  On Ubuntu, CTRL-ALT-DEL, and ENTER
  On OSX, CMD-SHIFT-q

  To wake: Spacebar.

  Circuit:
  - Arduino Leonardo or Micro
  - wire to connect D2 to ground

  created 6 Mar 2012
  modified 27 Mar 2012
  by Tom Igoe

  This example is in the public domain.

  http://www.arduino.cc/en/Tutorial/KeyboardLogout
*/

#define OSX 0
#define WINDOWS 1
#define UBUNTU 2

#include "Keyboard.h"

// change this to match your platform:
int platform = OSX;

void setup() {
  // make pin 2 an input and turn on the pull-up resistor so it goes high unless
  // connected to ground:
  pinMode(2, INPUT_PULLUP);
  Keyboard.begin();
}

void loop() {
  while (digitalRead(2) == HIGH) {
    // do nothing until pin 2 goes low
    delay(500);
  }
  delay(1000);

  switch (platform) {
    case OSX:
      Keyboard.press(KEY_LEFT_GUI);
      // Shift-Q logs out:
      Keyboard.press(KEY_LEFT_SHIFT);
      Keyboard.press('Q');
      delay(100);
      Keyboard.releaseAll();
      // enter:
      Keyboard.write(KEY_RETURN);
      break;
    case WINDOWS:
      // CTRL-ALT-DEL:
      Keyboard.press(KEY_LEFT_CTRL);
      Keyboard.press(KEY_LEFT_ALT);
      Keyboard.press(KEY_DELETE);
      delay(100);
      Keyboard.releaseAll();
      // ALT-l:
      delay(2000);
      Keyboard.press(KEY_LEFT_ALT);
      Keyboard.press('l');
      Keyboard.releaseAll();
      break;
    case UBUNTU:
      // CTRL-ALT-DEL:
      Keyboard.press(KEY_LEFT_CTRL);
      Keyboard.press(KEY_LEFT_ALT);
      Keyboard.press(KEY_DELETE);
      delay(1000);
      Keyboard.releaseAll();
      // Enter to confirm logout:
      Keyboard.write(KEY_RETURN);
      break;
  }

  // do nothing:
  while (true);
}

键值列表

#define KEY_LEFT_CTRL   0x80
#define KEY_LEFT_SHIFT    0x81
#define KEY_LEFT_ALT    0x82
#define KEY_LEFT_GUI    0x83
#define KEY_RIGHT_CTRL    0x84
#define KEY_RIGHT_SHIFT   0x85
#define KEY_RIGHT_ALT   0x86
#define KEY_RIGHT_GUI   0x87

#define KEY_UP_ARROW    0xDA
#define KEY_DOWN_ARROW    0xD9
#define KEY_LEFT_ARROW    0xD8
#define KEY_RIGHT_ARROW   0xD7
#define KEY_BACKSPACE   0xB2
#define KEY_TAB       0xB3
#define KEY_RETURN      0xB0
#define KEY_ESC       0xB1
#define KEY_INSERT      0xD1
#define KEY_DELETE      0xD4
#define KEY_PAGE_UP     0xD3
#define KEY_PAGE_DOWN   0xD6
#define KEY_HOME      0xD2
#define KEY_END       0xD5
#define KEY_CAPS_LOCK   0xC1
#define KEY_F1        0xC2
#define KEY_F2        0xC3
#define KEY_F3        0xC4
#define KEY_F4        0xC5
#define KEY_F5        0xC6
#define KEY_F6        0xC7
#define KEY_F7        0xC8
#define KEY_F8        0xC9
#define KEY_F9        0xCA
#define KEY_F10       0xCB
#define KEY_F11       0xCC
#define KEY_F12       0xCD