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Functional interrupt fix #8175

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May 11, 2023
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Original file line number Diff line number Diff line change
@@ -1,44 +1,67 @@
/*
* This example demonstrates usage of interrupt by detecting a button press.
*
* Setup: Connect first button between pin defined in BUTTON1 and GND
* Similarly connect second button between pin defined in BUTTON2 and GND.
* If you do not have a button simply connect a wire to those buttons
* - touching GND pin with other end of the wire will behave same as pressing the connected button.
* Wen using the bare wire be careful not to touch any other pin by accident.
*
* Note: There is no de-bounce implemented and the physical connection will normally
* trigger many more button presses than actually happened.
* This is completely normal and is not to be considered a fault.
*/


#include <Arduino.h>
#include <FunctionalInterrupt.h>

#define BUTTON1 16
#define BUTTON2 17

class Button
{
class Button{
public:
Button(uint8_t reqPin) : PIN(reqPin){
pinMode(PIN, INPUT_PULLUP);
attachInterrupt(PIN, std::bind(&Button::isr,this), FALLING);
};
~Button() {

void begin(){
attachInterrupt(PIN, std::bind(&Button::isr,this), FALLING);
Serial.printf("Started button interrupt on pin %d\n", PIN);
}

~Button(){
detachInterrupt(PIN);
}

void ARDUINO_ISR_ATTR isr() {
void ARDUINO_ISR_ATTR isr(){
numberKeyPresses += 1;
pressed = true;
}

void checkPressed() {
void checkPressed(){
if (pressed) {
Serial.printf("Button on pin %u has been pressed %u times\n", PIN, numberKeyPresses);
pressed = false;
}
}

private:
const uint8_t PIN;
const uint8_t PIN;
volatile uint32_t numberKeyPresses;
volatile bool pressed;
};

Button button1(BUTTON1);
Button button2(BUTTON2);


void setup() {
Serial.begin(115200);
while(!Serial) delay(10);
Serial.println("Starting Functional Interrupt example.");
button1.begin();
button2.begin();
Serial.println("Setup done.");
}

void loop() {
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