Einen Tastendruck ausgeben

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16

das funktioniert bei mir einwandfrei:

/*
 * Arduino Pro Micro - 2 Tastendrücke 
 * https://forum.arduino.cc/t/einen-tastendruck-ausgeben/1028454/
 * by noiasca
 * 2022-09-07
 *   board Resetten und halten
 *   Serial auf die angegebenen umschalten
 *   Kompilieren&Hochladen drücken
 *   Wenn fertig Reset loslassen
 *   
 */
 
#include "Keyboard.h"

constexpr byte schalterRechtsPin = 2;
constexpr byte schalterLinksPin = 3;

class Button {                                   // class to debounce switches
    const byte buttonPin;                        // the pin for the button
    static constexpr byte debounceDelay = 40;    // the debounce time - one value for all buttons (hence "static")
    const bool active;                           // is the button HIGH or LOW active
    bool lastButtonState = HIGH;                 // previous state of pin
    byte lastDebounceTime = 0;                   // previous debounce time (we just need short debounce delay, so the rollover of the byte variable works fine and spares 3 bytes compared to an unsigned long)

  public:
    Button(byte attachTo, bool active = LOW) : buttonPin(attachTo), active(active) {}

    void begin() {                               // sets the pinMode and optionally activates the internal pullups
      if (active == LOW)
        pinMode(buttonPin, INPUT_PULLUP);
      else
        pinMode(buttonPin, INPUT);
    }

    bool wasPressed() {
      bool buttonState = LOW;
      byte reading = LOW;
      if (digitalRead(buttonPin) == active) reading = HIGH;
      if (((millis() & 0xFF ) - lastDebounceTime) > debounceDelay) {
        if (reading != lastButtonState && lastButtonState == LOW) {
          buttonState = HIGH;
        }
        lastDebounceTime = millis() & 0xFF;   // we store just the last byte from millis()
        lastButtonState = reading;
      }
      return buttonState;
    }
};

Button buttonA(schalterRechtsPin);  // create a button object on this pin, by default, activate internal pullups
Button buttonB(schalterLinksPin);

void setup()
{
  Serial.begin(115200);
  Serial.println(F("Start..."));
  buttonA.begin();
  buttonB.begin();
}

void loop()
{
  if (buttonA.wasPressed())
  {
    Keyboard.print('a');
  }
  if (buttonB.wasPressed())
  {
    Keyboard.print('b');
  }  
}

gibt sofort den Buchstaben aus auch wenn der Kontakt länger geschlossen bleibt.