74 lines
1.9 KiB
Arduino
74 lines
1.9 KiB
Arduino
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/* @file EventSerialKeypad.pde
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|| @version 1.0
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|| @author Alexander Brevig
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|| @contact alexanderbrevig@gmail.com
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|| @description
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|| | Demonstrates using the KeypadEvent.
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|| #
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*/
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#include <Keypad.h>
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const byte ROWS = 4; //four rows
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const byte COLS = 3; //three columns
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char keys[ROWS][COLS] = {
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{'1','2','3'},
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{'4','5','6'},
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{'7','8','9'},
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{'*','0','#'}
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};
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byte rowPins[ROWS] = {5, 4, 3, 2}; //connect to the row pinouts of the keypad
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byte colPins[COLS] = {8, 7, 6}; //connect to the column pinouts of the keypad
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Keypad keypad = Keypad( makeKeymap(keys), rowPins, colPins, ROWS, COLS );
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byte ledPin = 13;
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boolean blink = false;
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boolean ledPin_state;
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void setup(){
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Serial.begin(9600);
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pinMode(ledPin, OUTPUT); // Sets the digital pin as output.
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digitalWrite(ledPin, HIGH); // Turn the LED on.
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ledPin_state = digitalRead(ledPin); // Store initial LED state. HIGH when LED is on.
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keypad.addEventListener(keypadEvent); // Add an event listener for this keypad
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}
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void loop(){
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char key = keypad.getKey();
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if (key) {
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Serial.println(key);
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}
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if (blink){
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digitalWrite(ledPin,!digitalRead(ledPin)); // Change the ledPin from Hi2Lo or Lo2Hi.
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delay(100);
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}
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}
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// Taking care of some special events.
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void keypadEvent(KeypadEvent key){
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switch (keypad.getState()){
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case PRESSED:
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if (key == '#') {
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digitalWrite(ledPin,!digitalRead(ledPin));
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ledPin_state = digitalRead(ledPin); // Remember LED state, lit or unlit.
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}
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break;
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case RELEASED:
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if (key == '*') {
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digitalWrite(ledPin,ledPin_state); // Restore LED state from before it started blinking.
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blink = false;
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}
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break;
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case HOLD:
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if (key == '*') {
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blink = true; // Blink the LED when holding the * key.
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}
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break;
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}
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}
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