145 lines
3 KiB
C++
145 lines
3 KiB
C++
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/*
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* This file is part of the "bluetoothheater" distribution
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* (https://gitlab.com/mrjones.id.au/bluetoothheater)
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*
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* Copyright (C) 2018 Ray Jones <ray@mrjones.id.au>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*
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*/
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#include "GPIO.h"
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#include "../Protocol/helpers.h"
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CGPIOin::CGPIOin()
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{
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_Mode = GPIOinNone;
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_pins[0] = 0;
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_pins[1] = 0;
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_prevPins = 0;
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_lastDebounceTime = 0;
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_lastKey = 0;
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_debounceDelay = 50;
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}
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void
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CGPIOin::begin(int pin1, int pin2, GPIOinModes mode)
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{
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_pins[0] = pin1;
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_pins[1] = pin2;
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pinMode(pin1, INPUT_PULLUP); // GPIO input pin #1
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pinMode(pin2, INPUT_PULLUP); // GPIO input pin #1
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setMode(mode);
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}
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void
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CGPIOin::manageGPIO()
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{
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switch (_Mode) {
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case GPIOinNone:
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break;
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case GPIOinOn1Off2:
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_doOn1Off2();
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break;
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case GPIOinOnHold1:
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_doOnHold1();
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break;
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case GPIOinOn1Off1:
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_doOn1Off1();
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break;
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}
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}
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void
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CGPIOin::_doOn1Off2()
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{
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uint8_t newKey = _scanInputs();
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// determine edge events
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uint8_t keyChange = newKey ^ _lastKey;
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_lastKey = newKey;
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if(keyChange) {
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if(newKey & 0x01) {
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requestOn();
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}
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if(newKey & 0x02) {
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requestOff();
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}
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}
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}
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// mode where heater runs if input 1 is shorted
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// stops when open
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void
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CGPIOin::_doOnHold1()
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{
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uint8_t newKey = _scanInputs();
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// determine edge events
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uint8_t keyChange = newKey ^ _lastKey;
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_lastKey = newKey;
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if(keyChange) {
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if(newKey & 0x01) {
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requestOn();
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}
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else {
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requestOff();
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}
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}
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}
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// mode where heater runs if input 1 is shorted
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// stops when open
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void
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CGPIOin::_doOn1Off1()
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{
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uint8_t newKey = _scanInputs();
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// determine edge events
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uint8_t keyChange = newKey ^ _lastKey;
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_lastKey = newKey;
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if(keyChange) {
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if(newKey & 0x01) {
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if(getHeaterInfo().getRunStateEx())
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requestOff();
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else
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requestOn();
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}
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}
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}
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uint8_t
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CGPIOin::_scanInputs()
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{
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uint8_t newPins = 0;
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if(_pins[0] && digitalRead(_pins[0]) == HIGH) newPins |= 0x01;
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if(_pins[1] && digitalRead(_pins[1]) == HIGH) newPins |= 0x02;
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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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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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