70 lines
1.7 KiB
Arduino
70 lines
1.7 KiB
Arduino
/*
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* This example demonstrates usage of interrupt by detecting a button press.
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*
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* Setup: Connect first button between pin defined in BUTTON1 and GND
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* Similarly connect second button between pin defined in BUTTON2 and GND.
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* If you do not have a button simply connect a wire to those buttons
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* - touching GND pin with other end of the wire will behave same as pressing the connected button.
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* Wen using the bare wire be careful not to touch any other pin by accident.
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*
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* Note: There is no de-bounce implemented and the physical connection will normally
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* trigger many more button presses than actually happened.
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* This is completely normal and is not to be considered a fault.
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*/
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#include <Arduino.h>
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#include <FunctionalInterrupt.h>
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#define BUTTON1 16
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#define BUTTON2 17
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class Button {
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public:
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Button(uint8_t reqPin) : PIN(reqPin) {
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pinMode(PIN, INPUT_PULLUP);
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};
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void begin() {
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attachInterrupt(PIN, std::bind(&Button::isr, this), FALLING);
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Serial.printf("Started button interrupt on pin %d\n", PIN);
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}
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~Button() {
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detachInterrupt(PIN);
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}
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void ARDUINO_ISR_ATTR isr() {
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numberKeyPresses = numberKeyPresses + 1;
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pressed = true;
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}
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void checkPressed() {
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if (pressed) {
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Serial.printf("Button on pin %u has been pressed %lu times\n", PIN, numberKeyPresses);
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pressed = false;
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}
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}
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private:
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const uint8_t PIN;
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volatile uint32_t numberKeyPresses;
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volatile bool pressed;
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};
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Button button1(BUTTON1);
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Button button2(BUTTON2);
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void setup() {
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Serial.begin(115200);
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Serial.println("Starting Functional Interrupt example.");
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button1.begin();
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button2.begin();
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Serial.println("Setup done.");
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}
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void loop() {
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button1.checkPressed();
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button2.checkPressed();
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}
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