USB 1key for Arduino Leonardo

USB1key.ino

// USB 1-key
// 20140804 @houmei
//
#include <USBrawkeyboard.h>
 
USBrawkeyboard rawkybd;


#define BUTTON 4
#define LED 13

void setup() {
  pinMode(BUTTON,INPUT_PULLUP);
  pinMode(LED,OUTPUT);
}

int pressed; // BUTTON
int prev; // previous pressed

// int keycode=0x04; // 'a'
// int keycode=0x46; // 'PRINT SCREEN'
 int keycode=0x35; // Zenkaku/Hankaku(JP Keyboard)/(~` US keyboard)
// int keycode=0x89; // Yen -> need HID.cpp patch

void loop() {
  pressed=!digitalRead(BUTTON); // 1..press 0..release

  if (pressed==prev) {
    digitalWrite(LED,pressed);
    if (pressed==1) {
      rawkybd.press(keycode);
    } else {
      rawkybd.release(keycode);
    }
  }
  prev=pressed;
  delay(50);
}