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FryEngine.cpp
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FryEngine.cpp
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/*
* Copyright (c) 2022, Vincent Bloemen (VinzzB)
* All rights reserved.
*
* This source code is licensed under the Apache 2.0 license found in the
* LICENSE file in the root directory of this source tree.
*/
#include "Arduino.h"
#include "Product.h"
#include "FryEngine.h"
#include <math.h>
FryEngine::FryEngine(byte heaterPin, byte fanPin, byte temperaturePin, int preHeatTimeout, callback stepCompletedCallBack) {
_stepCompletedCallBackPtr = stepCompletedCallBack;
_heaterPin = heaterPin;
_fanPin = fanPin;
_temperaturePin = temperaturePin;
_refreshInterval = 500;
_currentStep = 0;
_preHeatTimeout = preHeatTimeout;
pinMode(_heaterPin,OUTPUT);
pinMode(_fanPin,OUTPUT);
pinMode(_temperaturePin, INPUT);
resetTemperature();
}
byte FryEngine::resetTemperature() {
for(int x = 0; x <10; x++) { updateTemperature(); }
return getTemperature();
}
void FryEngine::setProduct(Product* product) {
_preHeat = product->preHeat;
//copy all steps
for(_stepsCount = 0; _stepsCount < product->stepsCount; _stepsCount++) { //&& _stepsCount < MAX_STEPS
memcpy(&_steps[_stepsCount], &product->steps[_stepsCount], 4);
}
}
void FryEngine::start() {
_currentStep = 0;
_runningSince = millis();
_preHeatReached = false;
_preHeatReachedTime = 0;
powerFan(getCurrentStep()->temp>0);
}
void FryEngine::start(Product* product) {
setProduct(product);
start();
}
void FryEngine::stop() {
_currentStep = 0;
_runningSince = 0;
powerFan(0);
powerHeater(0);
_stepCompletedCallBackPtr(ENGINE_STOPPED_STEP);
}
unsigned int FryEngine::getElapsedSeconds() {
return _runningSince == 0 ? 0 : (millis() - _runningSince) / 1000 ;
}
unsigned int FryEngine::getRemainingSeconds() {
int allSecondsTillCurrentStep = 0;
if(!isRunning()) return 0;
for (int x = 0; x < getCurrentStepIdx(); x++) {
allSecondsTillCurrentStep += _steps[x].timeInSec;
}
int remainingTime = getCurrentStep()->timeInSec - (getElapsedSeconds()-allSecondsTillCurrentStep );
return remainingTime < 0 ? 0 : remainingTime;
}
CookStep* FryEngine::getCurrentStep() {
return &_steps[_currentStep];
}
CookStep* FryEngine::getStep(byte stepIdx) {
return &_steps[stepIdx];
}
bool FryEngine::getPreHeatReached() {
return _preHeatReached;
}
bool FryEngine::getPreHeat() {
return _preHeat;
}
void FryEngine::setPreHeat(bool value){
_preHeat = value;
}
byte FryEngine::getCurrentStepIdx() {
return _currentStep;
}
byte FryEngine::getStepsCount() {
return _stepsCount;
}
void FryEngine::updateTemperature() {
int val = analogRead(_temperaturePin);
double temp;
temp = log((100000.0/30)*((1024.0/val-1))); //100000 = 100k thermistor.
temp = 1 / (0.001129148 + (0.000234125 + (0.0000000876741 * temp * temp ))* temp );
temp -= 273.15;
_temperatures[_tempIdx++ % 10] = constrain(temp, 0, 255);
}
byte FryEngine::getTemperature() {
int totTemp = 0;
for(int x = 0; x <10; x++) {
totTemp += (byte)_temperatures[x];
}
return totTemp / 10;
}
bool FryEngine::isRunning() {
return _runningSince > 0;
}
//return true to process timer event in ino script.
bool FryEngine::timer() {
unsigned long refreshMillis = millis();
if (refreshMillis - _refreshedOn >= _refreshInterval) {
//do refresh actions!
_refreshedOn = refreshMillis;
//update current device temperature
updateTemperature();
//is engine running?
if (isRunning()) {
//is pre heating?
if(getPreHeat()) {
//reset running time untill Pre Heat mode is deactivated by user.
_runningSince = millis();
unsigned int secPassed = (refreshMillis - _preHeatReachedTime) / 1000;
//stop the engine when [PreHeatTimeout] seconds passed since temperature was reached without any user interaction.
if(_preHeatReached && secPassed >= _preHeatTimeout){
stop();
return true;
}
//pre heat complete?
if(!_preHeatReached && getTemperature() >= getCurrentStep()->temp){
_preHeatReached = true;
_preHeatReachedTime = refreshMillis;
_stepCompletedCallBackPtr(PREHEAT_COMPLETE_STEP);
}
}
//Is Step complete?
if (getRemainingSeconds() <= 0){
int completedStep = _currentStep;
//Get the next step that contains time and store the index in _currentStep.
while(++_currentStep < getStepsCount() && getCurrentStep()->timeInSec==0) { }
//custom callback to ino script (eg for buzzer)
_stepCompletedCallBackPtr(completedStep);
//Are we trhrough all the steps?
if(_currentStep >= getStepsCount()) {
stop();
} else {
//reset isOnTemp when starting a new step.
_isOnTemp = getTemperature() >= getCurrentStep()->temp;
//set fan OFF when temperature esuals zero.
powerFan(getCurrentStep()->temp>0);
}
}
//check if fryer is still on temperature.
adjustHeat();
}
return true;
}
return false;
}
bool FryEngine::isOnTemperature() {
return _isOnTemp;
}
void FryEngine::adjustHeat() {
if(isRunning()){
byte currentTemp = getTemperature();
byte prefferedTemp = getCurrentStep()->temp;
//is temperature greater than the preffered temperature?
//or was the fryer on temperature and is the current temperature still above the preffered Temperature minus the offset (-5)
_isOnTemp = (currentTemp >= prefferedTemp) || (_isOnTemp && currentTemp > prefferedTemp-TEMP_OFFSET_LOW);
powerHeater( !isOnTemperature() );
}
}
void FryEngine::powerFan(bool power) {
digitalWrite(_fanPin, power);
}
void FryEngine::powerHeater(bool power) {
digitalWrite(_heaterPin, power);
}