Button

Functions

• Button(int pinNr);
• Button(int pinNr, unsigned int logicLevel);
• ~Button();
• void update();
• void OnPressedEdge(void (*p_func)());
• void OnReleasedEdge(void (*p_func)());
• void OnBothButtonEdges(void (*p_func)());
• void IsPressedHigh(void (*p_func)());
• void IsPressedLow(void (*p_func)());
• virtual boolean getValue();
• int getPin();

---

---

Button(int pinNr);

Button(int pinNr, unsigned int logicLevel);

Description

• Constructor
• Needs a pinNr for the button
• Can take logicLevel, default (no param) = activeHigh. If voltage rises up when the button is pressed, logicLevel = avtiveHigh
  If voltage falls when the button is pressed, logicLevel = activeLow
• You can set the logicLevel as INPUT_PULLUP for the Arduino internal pullup resistor.

Syntax

Button myButton(3);
Button myButton(3,activeHigh);
Button myButton(3,activeLow);
Button myButton(3,INPUT_PULLUP);
Button myButton(3,pullup);
Button myButton(3,PULLUP);

---

~Button();

Description

• Destructor

Syntax

delete &myButton;

---

void update();

Description

• Reads the state of the button.
• If any event Function is defined, it will run these in certain conditions.

Syntax

myButton.update();

---

Events

You do not know how events work?
Look over here

void OnPressedEdge(void (*p_func)());

• Is executed when a rising edge of the button is detected.
• NO values accepted.
• NO return values.

void OnReleasedEdge(void (*p_func)());

• Is executed when a falling edge of the button is detected.
• NO values accepted.
• NO return values.

void OnBothButtonEdges(void (*p_func)());

• Is executed when a any edge of the button is detected.
• NO values accepted.
• NO return values.

void IsPressedHigh(void (*p_func)());

• Is executed when the button is pressed.
• NO values accepted.
• NO return values.

void IsPressedLow(void (*p_func)());

• Is executed when the button isn't pressed.
• NO values accepted.
• NO return values.

---

bool getValue();

Description

• Returns the active state of the button pin.

Syntax

bool state = myButton.getValue();

---

int getPin();

Description

• Returns the pin on which the button is connected to.

Syntax

int buttonPin = myButton.getPin();