/*
  temperature.h - temperature controller
  Part of Marlin

  Copyright (c) 2011 Erik van der Zalm

  Grbl 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.

  Grbl 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 Grbl.  If not, see <http://www.gnu.org/licenses/>.
*/

#ifndef temperature_h
#define temperature_h 

#include "Marlin.h"
#include "planner.h"
#include "stepper.h"


// public functions
void tp_init();  //initialize the heating
void manage_heater(); //it is critical that this is called periodically.

#ifdef FILAMENT_SENSOR
// For converting raw Filament Width to milimeters 
 float analog2widthFil(); 
 
// For converting raw Filament Width to an extrusion ratio 
 int widthFil_to_size_ratio();
#endif

// low level conversion routines
// do not use these routines and variables outside of temperature.cpp
#ifndef SINGLENOZZLE
extern int target_temperature[EXTRUDERS];  
extern float current_temperature[EXTRUDERS];
#ifdef SHOW_TEMP_ADC_VALUES
extern int current_temperature_raw[EXTRUDERS];
extern int current_temperature_bed_raw;
#endif
#else
extern int target_temperature[1];  
extern float current_temperature[1];
#ifdef SHOW_TEMP_ADC_VALUES
extern int current_temperature_raw[1];
extern int current_temperature_bed_raw;
#endif
#endif //SINGLENOZZLE

extern int target_temperature_bed;
extern float current_temperature_bed;
#ifdef TEMP_SENSOR_1_AS_REDUNDANT
  extern float redundant_temperature;
#endif

#if defined(CONTROLLERFAN_PIN) && CONTROLLERFAN_PIN > -1
  extern unsigned char soft_pwm_bed;
#endif

#ifdef PIDTEMP
  extern float Kp[4],Ki[4],Kd[4];
  float scalePID_i(float i);
  float scalePID_d(float d);
  float unscalePID_i(float i);
  float unscalePID_d(float d);

#endif

#ifdef PIDTEMPBED
  extern float bedKp,bedKi,bedKd;
#endif


#ifdef BABYSTEPPING
  extern volatile int babystepsTodo[3];
#endif
  
//high level conversion routines, for use outside of temperature.cpp
//inline so that there is no performance decrease.
//deg=degreeCelsius

FORCE_INLINE float degHotend(uint8_t extruder) {  
#ifndef SINGLENOZZLE
  return current_temperature[extruder];
#else
  return current_temperature[0];
#endif
};

#ifdef SHOW_TEMP_ADC_VALUES
FORCE_INLINE float rawHotendTemp(uint8_t extruder) {
#ifndef SINGLENOZZLE  
  return current_temperature_raw[extruder];
#else
  return current_temperature_raw[0];
#endif
};

FORCE_INLINE float rawBedTemp() {  
  return current_temperature_bed_raw;
};
#endif

FORCE_INLINE float degBed() {
  return current_temperature_bed;
};

FORCE_INLINE float degTargetHotend(uint8_t extruder) {
#ifndef SINGLENOZZLE  
  return target_temperature[extruder];
#else
  return target_temperature[0];
#endif
};

FORCE_INLINE float degTargetBed() {   
  return target_temperature_bed;
};

FORCE_INLINE void setTargetHotend(const float &celsius, uint8_t extruder) {
#ifndef SINGLENOZZLE  
  target_temperature[extruder] = celsius;
#else
  target_temperature[0] = celsius;
#endif
};

FORCE_INLINE void setTargetBed(const float &celsius) {  
  target_temperature_bed = celsius;
};

FORCE_INLINE bool isHeatingHotend(uint8_t extruder){
#ifndef SINGLENOZZLE
  return target_temperature[extruder] > current_temperature[extruder];
#else
  return target_temperature[0] > current_temperature[0];
#endif
};

FORCE_INLINE bool isHeatingBed() {
  return target_temperature_bed > current_temperature_bed;
};

FORCE_INLINE bool isCoolingHotend(uint8_t extruder) {
#ifndef SINGLENOZZLE
  return target_temperature[extruder] < current_temperature[extruder];
#else
  return target_temperature[0] < current_temperature[0];
#endif
};

FORCE_INLINE bool isCoolingBed() {
  return target_temperature_bed < current_temperature_bed;
};

#define degHotend0() degHotend(0)
#define degTargetHotend0() degTargetHotend(0)
#define setTargetHotend0(_celsius) setTargetHotend((_celsius), 0)
#define isHeatingHotend0() isHeatingHotend(0)
#define isCoolingHotend0() isCoolingHotend(0)
#if EXTRUDERS > 1 && !defined(SINGLENOZZLE)
#define degHotend1() degHotend(1)
#define degTargetHotend1() degTargetHotend(1)
#define setTargetHotend1(_celsius) setTargetHotend((_celsius), 1)
#define isHeatingHotend1() isHeatingHotend(1)
#define isCoolingHotend1() isCoolingHotend(1)
#else
#define setTargetHotend1(_celsius) do{}while(0)
#endif
#if EXTRUDERS > 2 && !defined(SINGLENOZZLE)
#define degHotend2() degHotend(2)
#define degTargetHotend2() degTargetHotend(2)
#define setTargetHotend2(_celsius) setTargetHotend((_celsius), 2)
#define isHeatingHotend2() isHeatingHotend(2)
#define isCoolingHotend2() isCoolingHotend(2)
#else
#define setTargetHotend2(_celsius) do{}while(0)
#endif
#if EXTRUDERS > 3 && !defined(SINGLENOZZLE)
#define degHotend3() degHotend(3)
#define degTargetHotend3() degTargetHotend(3)
#define setTargetHotend3(_celsius) setTargetHotend((_celsius), 3)
#define isHeatingHotend3() isHeatingHotend(3)
#define isCoolingHotend3() isCoolingHotend(3)
#else
#define setTargetHotend3(_celsius) do{}while(0)
#endif
#if EXTRUDERS > 4
#error Invalid number of extruders
#endif



int getHeaterPower(int heater);
void disable_heater();
void setWatch();
void updatePID();

#if defined (THERMAL_RUNAWAY_PROTECTION_PERIOD) && THERMAL_RUNAWAY_PROTECTION_PERIOD > 0
void thermal_runaway_protection(int *state, unsigned long *timer, float temperature, float target_temperature, int heater_id, int period_seconds, int hysteresis_degc);
static int thermal_runaway_state_machine[4]; // = {0,0,0,0};
static unsigned long thermal_runaway_timer[4]; // = {0,0,0,0};
static bool thermal_runaway = false;
#if TEMP_SENSOR_BED != 0
  static int thermal_runaway_bed_state_machine;
  static unsigned long thermal_runaway_bed_timer;
#endif
#endif

FORCE_INLINE void autotempShutdown(){
#ifdef AUTOTEMP
  if(autotemp_enabled)
  {
    autotemp_enabled=false;
    if(degTargetHotend(active_extruder)>autotemp_min)
      setTargetHotend(0,active_extruder);
  }
#endif
}

void PID_autotune(float temp, int extruder, int ncycles);

void setExtruderAutoFanState(int pin, bool state);
void checkExtruderAutoFans();

#endif
