141 lines
3.4 KiB
C++
141 lines
3.4 KiB
C++
/*
|
|
* This file is part of the "bluetoothheater" distribution
|
|
* (https://gitlab.com/mrjones.id.au/bluetoothheater)
|
|
*
|
|
* Copyright (C) 2018 Ray Jones <ray@mrjones.id.au>
|
|
*
|
|
* This program is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation, either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <https://www.gnu.org/licenses/>.
|
|
*
|
|
*/
|
|
|
|
#include <Arduino.h>
|
|
#include "keypad.h"
|
|
#include "pins.h"
|
|
|
|
CKeyPad::CKeyPad()
|
|
{
|
|
// pin scanning
|
|
_debouncedPins = 0;
|
|
_prevPins = 0;
|
|
_lastDebounceTime = millis();
|
|
_debounceDelay = 50;
|
|
// handler
|
|
_lastKey = 0;
|
|
_lastHoldTime = 0;
|
|
_holdTimeout = 0;
|
|
_keyCallback = NULL;
|
|
}
|
|
|
|
void
|
|
CKeyPad::init(int Lkey, int Rkey, int Ckey, int Ukey, int Dkey)
|
|
{
|
|
_pins[0] = Lkey;
|
|
_pins[1] = Rkey;
|
|
_pins[2] = Ckey;
|
|
_pins[3] = Ukey;
|
|
_pins[4] = Dkey;
|
|
for(int i=0; i<5; i++)
|
|
pinMode(_pins[i], INPUT);
|
|
}
|
|
|
|
uint8_t
|
|
CKeyPad::scanPins()
|
|
{
|
|
|
|
uint8_t newPins = 0;
|
|
if(digitalRead(_pins[0]) == LOW) newPins |= key_Left;
|
|
if(digitalRead(_pins[1]) == LOW) newPins |= key_Right;
|
|
if(digitalRead(_pins[2]) == LOW) newPins |= key_Centre;
|
|
if(digitalRead(_pins[3]) == LOW) newPins |= key_Up;
|
|
if(digitalRead(_pins[4]) == LOW) newPins |= key_Down;
|
|
|
|
if(newPins != _prevPins) {
|
|
_lastDebounceTime = millis();
|
|
_prevPins = newPins;
|
|
}
|
|
|
|
long elapsed = millis() - _lastDebounceTime;
|
|
if (elapsed > _debounceDelay) {
|
|
// whatever the reading is at, it's been there for longer than the debounce
|
|
// delay, so take it as the actual current state:
|
|
_debouncedPins = newPins;
|
|
}
|
|
|
|
return _debouncedPins;
|
|
}
|
|
|
|
void
|
|
CKeyPad::setCallback(void (*callback)(uint8_t event))
|
|
{
|
|
_keyCallback = callback;
|
|
}
|
|
|
|
uint8_t
|
|
CKeyPad::update()
|
|
{
|
|
uint8_t newKey = scanPins();
|
|
|
|
// determine edge events
|
|
uint8_t keyChange = newKey ^ _lastKey;
|
|
uint8_t Press = keyChange & newKey; // bits set upon intial press, ONLY
|
|
uint8_t Release = keyChange & ~newKey; // bits set upon intial release, ONLY
|
|
uint8_t Repeat = 0;
|
|
|
|
_lastKey = newKey;
|
|
|
|
if(Press) {
|
|
#ifdef DBG_KEYPAD
|
|
DebugPort.println("PRESS");
|
|
#endif
|
|
_lastHoldTime = millis();
|
|
_holdTimeout = 350; // initial hold delay
|
|
}
|
|
|
|
if(Release) {
|
|
#ifdef DBG_KEYPAD
|
|
DebugPort.println("RELEASE");
|
|
#endif
|
|
_holdTimeout = 0; // cancel repeat
|
|
}
|
|
|
|
long tDelta = millis() - _lastHoldTime;
|
|
if(_holdTimeout && (tDelta > _holdTimeout)) {
|
|
#ifdef DBG_KEYPAD
|
|
DebugPort.println("REPEAT");
|
|
#endif
|
|
_holdTimeout = 150; // repeat delay
|
|
_lastHoldTime += _holdTimeout;
|
|
Repeat = newKey;
|
|
}
|
|
|
|
if(Press) {
|
|
if(_keyCallback != NULL)
|
|
_keyCallback(keyPressed | Press | newKey);
|
|
return keyPressed | Press;
|
|
}
|
|
|
|
if(Release) {
|
|
if(_keyCallback != NULL)
|
|
_keyCallback(keyReleased | Release);
|
|
return (keyReleased | Release);
|
|
}
|
|
|
|
if(Repeat) {
|
|
if(_keyCallback != NULL)
|
|
_keyCallback(keyRepeat | Repeat);
|
|
return (keyRepeat | Repeat);
|
|
}
|
|
|
|
return 0;
|
|
}
|