47 lines
1.3 KiB
C++
47 lines
1.3 KiB
C++
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#include <Arduino.h>
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#include "keypad.h"
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#include "pins.h"
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const unsigned long debounceDelay = 50; // the debounce time; increase if the output flickers
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void initKeyPad()
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{
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pinMode(keyLeft_pin, INPUT);
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pinMode(keyRight_pin, INPUT);
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pinMode(keyCentre_pin, INPUT);
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pinMode(keyUp_pin, INPUT);
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pinMode(keyDown_pin, INPUT);
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}
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uint8_t readKeys()
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{
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static uint8_t debouncedKey = 0;
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static unsigned long lastDebounceTime = 0;
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uint8_t newKey = 0;
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if(digitalRead(keyLeft_pin) == LOW) newKey |= keyPress_Left;
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if(digitalRead(keyRight_pin) == LOW) newKey |= keyPress_Right;
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if(digitalRead(keyCentre_pin) == LOW) newKey |= keyPress_Centre;
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if(digitalRead(keyUp_pin) == LOW) newKey |= keyPress_Up;
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if(digitalRead(keyDown_pin) == LOW) newKey |= keyPress_Down;
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static uint8_t prevKey = 0;
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if(newKey != prevKey) {
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lastDebounceTime = millis();
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prevKey = newKey;
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}
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unsigned long elapsed = millis() - lastDebounceTime;
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if (elapsed > debounceDelay) {
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// whatever the reading is at, it's been there for longer than the debounce
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// delay, so take it as the actual current state:
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// Serial.println("debounce");
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// if the button state has changed:
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if (newKey != debouncedKey) {
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debouncedKey = newKey;
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}
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}
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return debouncedKey;
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}
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