163 lines
3.8 KiB
C++
163 lines
3.8 KiB
C++
#include <Arduino.h>
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#include "keypad.h"
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#include "pins.h"
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/*
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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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return debouncedKey;
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}
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*/
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CKeyPad::CKeyPad()
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{
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// pin scanning
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_debouncedPins = 0;
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_prevPins = 0;
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_lastDebounceTime = millis();
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_debounceDelay = 50;
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// handler
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_lastKey = 0;
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_lastHoldTime = 0;
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_holdTimeout = 0;
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_keyCallback = NULL;
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}
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void
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CKeyPad::init(int Lkey, int Rkey, int Ckey, int Ukey, int Dkey)
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{
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_pins[0] = Lkey;
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_pins[1] = Rkey;
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_pins[2] = Ckey;
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_pins[3] = Ukey;
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_pins[4] = Dkey;
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for(int i=0; i<5; i++)
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pinMode(_pins[i], INPUT);
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}
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uint8_t
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CKeyPad::scanPins()
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{
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uint8_t newPins = 0;
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if(digitalRead(_pins[0]) == LOW) newPins |= key_Left;
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if(digitalRead(_pins[1]) == LOW) newPins |= key_Right;
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if(digitalRead(_pins[2]) == LOW) newPins |= key_Centre;
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if(digitalRead(_pins[3]) == LOW) newPins |= key_Up;
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if(digitalRead(_pins[4]) == LOW) newPins |= key_Down;
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if(newPins != _prevPins) {
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_lastDebounceTime = millis();
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_prevPins = newPins;
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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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_debouncedPins = newPins;
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}
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return _debouncedPins;
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}
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void
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CKeyPad::setCallback(void (*callback)(uint8_t event))
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{
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_keyCallback = callback;
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}
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uint8_t
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CKeyPad::update()
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{
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uint8_t newKey = scanPins();
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// determine edge events
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uint8_t keyChange = newKey ^ _lastKey;
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uint8_t Press = keyChange & newKey; // bits set upon intial press, ONLY
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uint8_t Release = keyChange & ~newKey; // bits set upon intial release, ONLY
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uint8_t Repeat = 0;
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_lastKey = newKey;
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if(Press) {
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#ifdef DBG_KEYPAD
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DebugPort.println("PRESS");
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#endif
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_lastHoldTime = millis();
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_holdTimeout = 350; // initial hold delay
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}
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if(Release) {
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#ifdef DBG_KEYPAD
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DebugPort.println("RELEASE");
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#endif
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_holdTimeout = 0; // cancel repeat
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}
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if(_holdTimeout && ((millis() - _lastHoldTime) > _holdTimeout)) {
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#ifdef DBG_KEYPAD
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DebugPort.println("REPEAT");
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#endif
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_holdTimeout = 150; // repeat delay
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_lastHoldTime += _holdTimeout;
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Repeat = newKey;
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}
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if(Press) {
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if(_keyCallback != NULL)
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_keyCallback(keyPressed | Press | newKey);
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return keyPressed | Press;
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}
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if(Release) {
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if(_keyCallback != NULL)
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_keyCallback(keyReleased | Release);
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return (keyReleased | Release);
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}
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if(Repeat) {
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if(_keyCallback != NULL)
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_keyCallback(keyRepeat | Repeat);
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return (keyRepeat | Repeat);
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}
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return 0;
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}
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