Keyboard Controller
Keyboard Controller
The Arduino Due has the ability to act as a USB host for peripherals such as a keyboard connected to the SerialUSB port. This example demonstrates the use of the KeyboardController library.
Hardware Required
－Arduino Due Board
－USB keyboard (NB : keyboards that connect through an internal USB hub, like Apple keyboards, will not work)
Syntax
/*
Keyboard Controller HID Example
Shows the output of a USB Keyboard connected to the USB
controller of an Arduino Due Board.
created 8 Oct 2012
by Cristian Maglie
*/
// Require keyboard control library
#include
// Initialize USB Controller
USBHost usb;
// Attach keyboard controller to USB
KeyboardController keyboard(usb);
// This function intercepts key press
void keyPressed() {
Serial.print("Pressed: ");
printKey();
}
// This function intercepts key release
void keyReleased() {
Serial.print("Released: ");
printKey();
}
void printKey() {
// getOemKey() returns the OEM-code associated with the key
Serial.print(" key:");
Serial.print(keyboard.getOemKey());
// getModifiers() returns a bits field with the modifiers-keys
int mod = keyboard.getModifiers();
Serial.print(" mod:");
Serial.print(mod);
Serial.print(" => ");
if (mod & LeftCtrl)
Serial.print("L-Ctrl ");
if (mod & LeftShift)
Serial.print("L-Shift ");
if (mod & Alt)
Serial.print("Alt ");
if (mod & LeftCmd)
Serial.print("L-Cmd ");
if (mod & RightCtrl)
Serial.print("R-Ctrl ");
if (mod & RightShift)
Serial.print("R-Shift ");
if (mod & AltGr)
Serial.print("AltGr ");
if (mod & RightCmd)
Serial.print("R-Cmd ");
// getKey() returns the ASCII translation of OEM key
// combined with modifiers.
Serial.write(keyboard.getKey());
Serial.println();
}
void setup()
{
Serial.begin(115200);
Serial.println("Program started");
delay(200);
}
void loop()
{
// Process USB tasks
usb.Task();
}
The text of the 86Duino reference is a modification of the Arduino reference, and is licensed under a Creative Commons Attribution-ShareAlike 3.0 License. Code samples in the reference are released into the public domain.
