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temperature.cpp
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/*
temperature.c - temperature control
Part of Marlin
Copyright (C) 2011 Camiel Gubbels / Erik van der Zalm
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 <http://www.gnu.org/licenses/>.
*/
/*
This firmware is a mashup between Sprinter and grbl.
(https://github.com/kliment/Sprinter)
(https://github.com/simen/grbl/tree)
It has preliminary support for Matthew Roberts advance algorithm
http://reprap.org/pipermail/reprap-dev/2011-May/003323.html
*/
#include "Marlin.h"
#include "ultralcd.h"
#include "sound.h"
#include "temperature.h"
#include "cardreader.h"
#include "Sd2PinMap.h"
#include <avr/wdt.h>
#include "adc.h"
#include "ConfigurationStore.h"
#include "messages.h"
#include "Timer.h"
#include "Configuration_prusa.h"
#include "config.h"
//===========================================================================
//=============================public variables============================
//===========================================================================
int target_temperature[EXTRUDERS] = { 0 };
int target_temperature_bed = 0;
int current_temperature_raw[EXTRUDERS] = { 0 };
float current_temperature[EXTRUDERS] = { 0.0 };
#ifdef PINDA_THERMISTOR
uint16_t current_temperature_raw_pinda = 0 ; //value with more averaging applied
uint16_t current_temperature_raw_pinda_fast = 0; //value read from adc
float current_temperature_pinda = 0.0;
#endif //PINDA_THERMISTOR
#ifdef AMBIENT_THERMISTOR
int current_temperature_raw_ambient = 0 ;
float current_temperature_ambient = 0.0;
#endif //AMBIENT_THERMISTOR
#ifdef VOLT_PWR_PIN
int current_voltage_raw_pwr = 0;
#endif
#ifdef VOLT_BED_PIN
int current_voltage_raw_bed = 0;
#endif
#if IR_SENSOR_ANALOG
int current_voltage_raw_IR = 0;
#endif //IR_SENSOR_ANALOG
int current_temperature_bed_raw = 0;
float current_temperature_bed = 0.0;
#ifdef PIDTEMP
float _Kp, _Ki, _Kd;
int pid_cycle, pid_number_of_cycles;
bool pid_tuning_finished = false;
#ifdef PID_ADD_EXTRUSION_RATE
float Kc=DEFAULT_Kc;
#endif
#endif //PIDTEMP
#ifdef FAN_SOFT_PWM
unsigned char fanSpeedSoftPwm;
#endif
#ifdef FANCHECK
volatile uint8_t fan_check_error = EFCE_OK;
#endif
unsigned char soft_pwm_bed;
#ifdef BABYSTEPPING
volatile int babystepsTodo[3]={0,0,0};
#endif
//===========================================================================
//=============================private variables============================
//===========================================================================
static volatile bool temp_meas_ready = false;
#ifdef PIDTEMP
//static cannot be external:
static float iState_sum[EXTRUDERS] = { 0 };
static float dState_last[EXTRUDERS] = { 0 };
static float pTerm[EXTRUDERS];
static float iTerm[EXTRUDERS];
static float dTerm[EXTRUDERS];
//int output;
static float pid_error[EXTRUDERS];
static float iState_sum_min[EXTRUDERS];
static float iState_sum_max[EXTRUDERS];
// static float pid_input[EXTRUDERS];
// static float pid_output[EXTRUDERS];
static bool pid_reset[EXTRUDERS];
#endif //PIDTEMP
#ifdef PIDTEMPBED
//static cannot be external:
static float temp_iState_bed = { 0 };
static float temp_dState_bed = { 0 };
static float pTerm_bed;
static float iTerm_bed;
static float dTerm_bed;
//int output;
static float pid_error_bed;
static float temp_iState_min_bed;
static float temp_iState_max_bed;
#else //PIDTEMPBED
static unsigned long previous_millis_bed_heater;
#endif //PIDTEMPBED
static unsigned char soft_pwm[EXTRUDERS];
#ifdef FAN_SOFT_PWM
static unsigned char soft_pwm_fan;
#endif
#if (defined(EXTRUDER_0_AUTO_FAN_PIN) && EXTRUDER_0_AUTO_FAN_PIN > -1) || \
(defined(EXTRUDER_1_AUTO_FAN_PIN) && EXTRUDER_1_AUTO_FAN_PIN > -1) || \
(defined(EXTRUDER_2_AUTO_FAN_PIN) && EXTRUDER_2_AUTO_FAN_PIN > -1)
unsigned long extruder_autofan_last_check = _millis();
uint8_t fanSpeedBckp = 255;
bool fan_measuring = false;
#endif
#if EXTRUDERS > 3
# error Unsupported number of extruders
#elif EXTRUDERS > 2
# define ARRAY_BY_EXTRUDERS(v1, v2, v3) { v1, v2, v3 }
#elif EXTRUDERS > 1
# define ARRAY_BY_EXTRUDERS(v1, v2, v3) { v1, v2 }
#else
# define ARRAY_BY_EXTRUDERS(v1, v2, v3) { v1 }
#endif
static ShortTimer oTimer4minTempHeater,oTimer4minTempBed;
// Init min and max temp with extreme values to prevent false errors during startup
static int minttemp_raw[EXTRUDERS] = ARRAY_BY_EXTRUDERS( HEATER_0_RAW_LO_TEMP , HEATER_1_RAW_LO_TEMP , HEATER_2_RAW_LO_TEMP );
static int maxttemp_raw[EXTRUDERS] = ARRAY_BY_EXTRUDERS( HEATER_0_RAW_HI_TEMP , HEATER_1_RAW_HI_TEMP , HEATER_2_RAW_HI_TEMP );
static int minttemp[EXTRUDERS] = ARRAY_BY_EXTRUDERS( 0, 0, 0 );
static int maxttemp[EXTRUDERS] = ARRAY_BY_EXTRUDERS( 16383, 16383, 16383 );
#ifdef BED_MINTEMP
static int bed_minttemp_raw = HEATER_BED_RAW_LO_TEMP;
#endif
#ifdef BED_MAXTEMP
static int bed_maxttemp_raw = HEATER_BED_RAW_HI_TEMP;
#endif
static void *heater_ttbl_map[EXTRUDERS] = ARRAY_BY_EXTRUDERS( (void *)HEATER_0_TEMPTABLE, (void *)HEATER_1_TEMPTABLE, (void *)HEATER_2_TEMPTABLE );
static uint8_t heater_ttbllen_map[EXTRUDERS] = ARRAY_BY_EXTRUDERS( HEATER_0_TEMPTABLE_LEN, HEATER_1_TEMPTABLE_LEN, HEATER_2_TEMPTABLE_LEN );
static float analog2temp(int raw, uint8_t e);
static float analog2tempBed(int raw);
static float analog2tempAmbient(int raw);
static void updateTemperaturesFromRawValues();
enum TempRunawayStates
{
TempRunaway_INACTIVE = 0,
TempRunaway_PREHEAT = 1,
TempRunaway_ACTIVE = 2,
};
#ifndef SOFT_PWM_SCALE
#define SOFT_PWM_SCALE 0
#endif
//===========================================================================
//============================= functions ============================
//===========================================================================
#if (defined (TEMP_RUNAWAY_BED_HYSTERESIS) && TEMP_RUNAWAY_BED_TIMEOUT > 0) || (defined (TEMP_RUNAWAY_EXTRUDER_HYSTERESIS) && TEMP_RUNAWAY_EXTRUDER_TIMEOUT > 0)
static float temp_runaway_status[4];
static float temp_runaway_target[4];
static float temp_runaway_timer[4];
static int temp_runaway_error_counter[4];
static void temp_runaway_check(int _heater_id, float _target_temperature, float _current_temperature, float _output, bool _isbed);
static void temp_runaway_stop(bool isPreheat, bool isBed);
#endif
void PID_autotune(float temp, int extruder, int ncycles)
{
pid_number_of_cycles = ncycles;
pid_tuning_finished = false;
float input = 0.0;
pid_cycle=0;
bool heating = true;
unsigned long temp_millis = _millis();
unsigned long t1=temp_millis;
unsigned long t2=temp_millis;
long t_high = 0;
long t_low = 0;
long bias, d;
float Ku, Tu;
float max = 0, min = 10000;
uint8_t safety_check_cycles = 0;
const uint8_t safety_check_cycles_count = (extruder < 0) ? 45 : 10; //10 cycles / 20s delay for extruder and 45 cycles / 90s for heatbed
float temp_ambient;
#if (defined(EXTRUDER_0_AUTO_FAN_PIN) && EXTRUDER_0_AUTO_FAN_PIN > -1) || \
(defined(EXTRUDER_1_AUTO_FAN_PIN) && EXTRUDER_1_AUTO_FAN_PIN > -1) || \
(defined(EXTRUDER_2_AUTO_FAN_PIN) && EXTRUDER_2_AUTO_FAN_PIN > -1)
unsigned long extruder_autofan_last_check = _millis();
#endif
if ((extruder >= EXTRUDERS)
#if (TEMP_BED_PIN <= -1)
||(extruder < 0)
#endif
){
SERIAL_ECHOLN("PID Autotune failed. Bad extruder number.");
pid_tuning_finished = true;
pid_cycle = 0;
return;
}
SERIAL_ECHOLN("PID Autotune start");
disable_heater(); // switch off all heaters.
if (extruder<0)
{
soft_pwm_bed = (MAX_BED_POWER)/2;
timer02_set_pwm0(soft_pwm_bed << 1);
bias = d = (MAX_BED_POWER)/2;
target_temperature_bed = (int)temp; // to display the requested target bed temperature properly on the main screen
}
else
{
soft_pwm[extruder] = (PID_MAX)/2;
bias = d = (PID_MAX)/2;
target_temperature[extruder] = (int)temp; // to display the requested target extruder temperature properly on the main screen
}
for(;;) {
#ifdef WATCHDOG
wdt_reset();
#endif //WATCHDOG
if(temp_meas_ready == true) { // temp sample ready
updateTemperaturesFromRawValues();
input = (extruder<0)?current_temperature_bed:current_temperature[extruder];
max=max(max,input);
min=min(min,input);
#if (defined(EXTRUDER_0_AUTO_FAN_PIN) && EXTRUDER_0_AUTO_FAN_PIN > -1) || \
(defined(EXTRUDER_1_AUTO_FAN_PIN) && EXTRUDER_1_AUTO_FAN_PIN > -1) || \
(defined(EXTRUDER_2_AUTO_FAN_PIN) && EXTRUDER_2_AUTO_FAN_PIN > -1)
if(_millis() - extruder_autofan_last_check > 2500) {
checkExtruderAutoFans();
extruder_autofan_last_check = _millis();
}
#endif
if(heating == true && input > temp) {
if(_millis() - t2 > 5000) {
heating=false;
if (extruder<0)
{
soft_pwm_bed = (bias - d) >> 1;
timer02_set_pwm0(soft_pwm_bed << 1);
}
else
soft_pwm[extruder] = (bias - d) >> 1;
t1=_millis();
t_high=t1 - t2;
max=temp;
}
}
if(heating == false && input < temp) {
if(_millis() - t1 > 5000) {
heating=true;
t2=_millis();
t_low=t2 - t1;
if(pid_cycle > 0) {
bias += (d*(t_high - t_low))/(t_low + t_high);
bias = constrain(bias, 20 ,(extruder<0?(MAX_BED_POWER):(PID_MAX))-20);
if(bias > (extruder<0?(MAX_BED_POWER):(PID_MAX))/2) d = (extruder<0?(MAX_BED_POWER):(PID_MAX)) - 1 - bias;
else d = bias;
SERIAL_PROTOCOLPGM(" bias: "); SERIAL_PROTOCOL(bias);
SERIAL_PROTOCOLPGM(" d: "); SERIAL_PROTOCOL(d);
SERIAL_PROTOCOLPGM(" min: "); SERIAL_PROTOCOL(min);
SERIAL_PROTOCOLPGM(" max: "); SERIAL_PROTOCOLLN(max);
if(pid_cycle > 2) {
Ku = (4.0*d)/(3.14159*(max-min)/2.0);
Tu = ((float)(t_low + t_high)/1000.0);
SERIAL_PROTOCOLPGM(" Ku: "); SERIAL_PROTOCOL(Ku);
SERIAL_PROTOCOLPGM(" Tu: "); SERIAL_PROTOCOLLN(Tu);
_Kp = 0.6*Ku;
_Ki = 2*_Kp/Tu;
_Kd = _Kp*Tu/8;
SERIAL_PROTOCOLLNPGM(" Classic PID ");
SERIAL_PROTOCOLPGM(" Kp: "); SERIAL_PROTOCOLLN(_Kp);
SERIAL_PROTOCOLPGM(" Ki: "); SERIAL_PROTOCOLLN(_Ki);
SERIAL_PROTOCOLPGM(" Kd: "); SERIAL_PROTOCOLLN(_Kd);
/*
_Kp = 0.33*Ku;
_Ki = _Kp/Tu;
_Kd = _Kp*Tu/3;
SERIAL_PROTOCOLLNPGM(" Some overshoot ");
SERIAL_PROTOCOLPGM(" Kp: "); SERIAL_PROTOCOLLN(_Kp);
SERIAL_PROTOCOLPGM(" Ki: "); SERIAL_PROTOCOLLN(_Ki);
SERIAL_PROTOCOLPGM(" Kd: "); SERIAL_PROTOCOLLN(_Kd);
_Kp = 0.2*Ku;
_Ki = 2*_Kp/Tu;
_Kd = _Kp*Tu/3;
SERIAL_PROTOCOLLNPGM(" No overshoot ");
SERIAL_PROTOCOLPGM(" Kp: "); SERIAL_PROTOCOLLN(_Kp);
SERIAL_PROTOCOLPGM(" Ki: "); SERIAL_PROTOCOLLN(_Ki);
SERIAL_PROTOCOLPGM(" Kd: "); SERIAL_PROTOCOLLN(_Kd);
*/
}
}
if (extruder<0)
{
soft_pwm_bed = (bias + d) >> 1;
timer02_set_pwm0(soft_pwm_bed << 1);
}
else
soft_pwm[extruder] = (bias + d) >> 1;
pid_cycle++;
min=temp;
}
}
}
if(input > (temp + 20)) {
SERIAL_PROTOCOLLNPGM("PID Autotune failed! Temperature too high");
pid_tuning_finished = true;
pid_cycle = 0;
return;
}
if(_millis() - temp_millis > 2000) {
int p;
if (extruder<0){
p=soft_pwm_bed;
SERIAL_PROTOCOLPGM("B:");
}else{
p=soft_pwm[extruder];
SERIAL_PROTOCOLPGM("T:");
}
SERIAL_PROTOCOL(input);
SERIAL_PROTOCOLPGM(" @:");
SERIAL_PROTOCOLLN(p);
if (safety_check_cycles == 0) { //save ambient temp
temp_ambient = input;
//SERIAL_ECHOPGM("Ambient T: ");
//MYSERIAL.println(temp_ambient);
safety_check_cycles++;
}
else if (safety_check_cycles < safety_check_cycles_count) { //delay
safety_check_cycles++;
}
else if (safety_check_cycles == safety_check_cycles_count){ //check that temperature is rising
safety_check_cycles++;
//SERIAL_ECHOPGM("Time from beginning: ");
//MYSERIAL.print(safety_check_cycles_count * 2);
//SERIAL_ECHOPGM("s. Difference between current and ambient T: ");
//MYSERIAL.println(input - temp_ambient);
if (abs(input - temp_ambient) < 5.0) {
temp_runaway_stop(false, (extruder<0));
pid_tuning_finished = true;
return;
}
}
temp_millis = _millis();
}
if(((_millis() - t1) + (_millis() - t2)) > (10L*60L*1000L*2L)) {
SERIAL_PROTOCOLLNPGM("PID Autotune failed! timeout");
pid_tuning_finished = true;
pid_cycle = 0;
return;
}
if(pid_cycle > ncycles) {
SERIAL_PROTOCOLLNPGM("PID Autotune finished! Put the last Kp, Ki and Kd constants from above into Configuration.h");
pid_tuning_finished = true;
pid_cycle = 0;
return;
}
lcd_update(0);
}
}
void updatePID()
{
#ifdef PIDTEMP
for(uint_least8_t e = 0; e < EXTRUDERS; e++) {
iState_sum_max[e] = PID_INTEGRAL_DRIVE_MAX / cs.Ki;
}
#endif
#ifdef PIDTEMPBED
temp_iState_max_bed = PID_INTEGRAL_DRIVE_MAX / cs.bedKi;
#endif
}
int getHeaterPower(int heater) {
if (heater<0)
return soft_pwm_bed;
return soft_pwm[heater];
}
#if (defined(EXTRUDER_0_AUTO_FAN_PIN) && EXTRUDER_0_AUTO_FAN_PIN > -1) || \
(defined(EXTRUDER_1_AUTO_FAN_PIN) && EXTRUDER_1_AUTO_FAN_PIN > -1) || \
(defined(EXTRUDER_2_AUTO_FAN_PIN) && EXTRUDER_2_AUTO_FAN_PIN > -1)
#if defined(FAN_PIN) && FAN_PIN > -1
#if EXTRUDER_0_AUTO_FAN_PIN == FAN_PIN
#error "You cannot set EXTRUDER_0_AUTO_FAN_PIN equal to FAN_PIN"
#endif
#if EXTRUDER_1_AUTO_FAN_PIN == FAN_PIN
#error "You cannot set EXTRUDER_1_AUTO_FAN_PIN equal to FAN_PIN"
#endif
#if EXTRUDER_2_AUTO_FAN_PIN == FAN_PIN
#error "You cannot set EXTRUDER_2_AUTO_FAN_PIN equal to FAN_PIN"
#endif
#endif
void setExtruderAutoFanState(int pin, bool state)
{
unsigned char newFanSpeed = (state != 0) ? EXTRUDER_AUTO_FAN_SPEED : 0;
// this idiom allows both digital and PWM fan outputs (see M42 handling).
pinMode(pin, OUTPUT);
digitalWrite(pin, newFanSpeed);
//analogWrite(pin, newFanSpeed);
}
#if (defined(FANCHECK) && (((defined(TACH_0) && (TACH_0 >-1)) || (defined(TACH_1) && (TACH_1 > -1)))))
void countFanSpeed()
{
//SERIAL_ECHOPGM("edge counter 1:"); MYSERIAL.println(fan_edge_counter[1]);
fan_speed[0] = (fan_edge_counter[0] * (float(250) / (_millis() - extruder_autofan_last_check)));
fan_speed[1] = (fan_edge_counter[1] * (float(250) / (_millis() - extruder_autofan_last_check)));
/*SERIAL_ECHOPGM("time interval: "); MYSERIAL.println(_millis() - extruder_autofan_last_check);
SERIAL_ECHOPGM("extruder fan speed:"); MYSERIAL.print(fan_speed[0]); SERIAL_ECHOPGM("; edge counter:"); MYSERIAL.println(fan_edge_counter[0]);
SERIAL_ECHOPGM("print fan speed:"); MYSERIAL.print(fan_speed[1]); SERIAL_ECHOPGM("; edge counter:"); MYSERIAL.println(fan_edge_counter[1]);
SERIAL_ECHOLNPGM(" ");*/
fan_edge_counter[0] = 0;
fan_edge_counter[1] = 0;
}
void checkFanSpeed()
{
uint8_t max_print_fan_errors = 0;
uint8_t max_extruder_fan_errors = 0;
#ifdef FAN_SOFT_PWM
max_print_fan_errors = 3; //15 seconds
max_extruder_fan_errors = 2; //10seconds
#else //FAN_SOFT_PWM
max_print_fan_errors = 15; //15 seconds
max_extruder_fan_errors = 5; //5 seconds
#endif //FAN_SOFT_PWM
if(fans_check_enabled != false)
fans_check_enabled = (eeprom_read_byte((uint8_t*)EEPROM_FAN_CHECK_ENABLED) > 0);
static unsigned char fan_speed_errors[2] = { 0,0 };
#if (defined(FANCHECK) && defined(TACH_0) && (TACH_0 >-1))
if ((fan_speed[0] == 0) && (current_temperature[0] > EXTRUDER_AUTO_FAN_TEMPERATURE)){ fan_speed_errors[0]++;}
else{
fan_speed_errors[0] = 0;
host_keepalive();
}
#endif
#if (defined(FANCHECK) && defined(TACH_1) && (TACH_1 >-1))
if ((fan_speed[1] < 5) && ((blocks_queued() ? block_buffer[block_buffer_tail].fan_speed : fanSpeed) > MIN_PRINT_FAN_SPEED)) fan_speed_errors[1]++;
else fan_speed_errors[1] = 0;
#endif
// drop the fan_check_error flag when both fans are ok
if( fan_speed_errors[0] == 0 && fan_speed_errors[1] == 0 && fan_check_error == EFCE_REPORTED){
// we may even send some info to the LCD from here
fan_check_error = EFCE_FIXED;
}
if ((fan_check_error == EFCE_FIXED) && !PRINTER_ACTIVE){
fan_check_error = EFCE_OK; //if the issue is fixed while the printer is doing nothing, reenable processing immediately.
lcd_reset_alert_level(); //for another fan speed error
}
if ((fan_speed_errors[0] > max_extruder_fan_errors) && fans_check_enabled && (fan_check_error == EFCE_OK)) {
fan_speed_errors[0] = 0;
fanSpeedError(0); //extruder fan
}
if ((fan_speed_errors[1] > max_print_fan_errors) && fans_check_enabled && (fan_check_error == EFCE_OK)) {
fan_speed_errors[1] = 0;
fanSpeedError(1); //print fan
}
}
//! Prints serialMsg to serial port, displays lcdMsg onto the LCD and beeps.
//! Extracted from fanSpeedError to save some space.
//! @param serialMsg pointer into PROGMEM, this text will be printed to the serial port
//! @param lcdMsg pointer into PROGMEM, this text will be printed onto the LCD
static void fanSpeedErrorBeep(const char *serialMsg, const char *lcdMsg){
SERIAL_ECHOLNRPGM(serialMsg);
if (get_message_level() == 0) {
Sound_MakeCustom(200,0,true);
LCD_ALERTMESSAGERPGM(lcdMsg);
}
}
void fanSpeedError(unsigned char _fan) {
if (get_message_level() != 0 && isPrintPaused) return;
//to ensure that target temp. is not set to zero in case that we are resuming print
if (card.sdprinting || is_usb_printing) {
if (heating_status != 0) {
lcd_print_stop();
}
else {
fan_check_error = EFCE_DETECTED; //plans error for next processed command
}
}
else {
// SERIAL_PROTOCOLLNRPGM(MSG_OCTOPRINT_PAUSED); //Why pause octoprint? is_usb_printing would be true in that case, so there is no need for this.
setTargetHotend0(0);
heating_status = 0;
fan_check_error = EFCE_REPORTED;
}
switch (_fan) {
case 0: // extracting the same code from case 0 and case 1 into a function saves 72B
fanSpeedErrorBeep(PSTR("Extruder fan speed is lower than expected"), MSG_FANCHECK_EXTRUDER);
break;
case 1:
fanSpeedErrorBeep(PSTR("Print fan speed is lower than expected"), MSG_FANCHECK_PRINT);
break;
}
// SERIAL_PROTOCOLLNRPGM(MSG_OK); //This ok messes things up with octoprint.
}
#endif //(defined(TACH_0) && TACH_0 >-1) || (defined(TACH_1) && TACH_1 > -1)
void checkExtruderAutoFans()
{
uint8_t fanState = 0;
// which fan pins need to be turned on?
#if defined(EXTRUDER_0_AUTO_FAN_PIN) && EXTRUDER_0_AUTO_FAN_PIN > -1
if (current_temperature[0] > EXTRUDER_AUTO_FAN_TEMPERATURE)
fanState |= 1;
#endif
#if defined(EXTRUDER_1_AUTO_FAN_PIN) && EXTRUDER_1_AUTO_FAN_PIN > -1
if (current_temperature[1] > EXTRUDER_AUTO_FAN_TEMPERATURE)
{
if (EXTRUDER_1_AUTO_FAN_PIN == EXTRUDER_0_AUTO_FAN_PIN)
fanState |= 1;
else
fanState |= 2;
}
#endif
#if defined(EXTRUDER_2_AUTO_FAN_PIN) && EXTRUDER_2_AUTO_FAN_PIN > -1
if (current_temperature[2] > EXTRUDER_AUTO_FAN_TEMPERATURE)
{
if (EXTRUDER_2_AUTO_FAN_PIN == EXTRUDER_0_AUTO_FAN_PIN)
fanState |= 1;
else if (EXTRUDER_2_AUTO_FAN_PIN == EXTRUDER_1_AUTO_FAN_PIN)
fanState |= 2;
else
fanState |= 4;
}
#endif
// update extruder auto fan states
#if defined(EXTRUDER_0_AUTO_FAN_PIN) && EXTRUDER_0_AUTO_FAN_PIN > -1
setExtruderAutoFanState(EXTRUDER_0_AUTO_FAN_PIN, (fanState & 1) != 0);
#endif
#if defined(EXTRUDER_1_AUTO_FAN_PIN) && EXTRUDER_1_AUTO_FAN_PIN > -1
if (EXTRUDER_1_AUTO_FAN_PIN != EXTRUDER_0_AUTO_FAN_PIN)
setExtruderAutoFanState(EXTRUDER_1_AUTO_FAN_PIN, (fanState & 2) != 0);
#endif
#if defined(EXTRUDER_2_AUTO_FAN_PIN) && EXTRUDER_2_AUTO_FAN_PIN > -1
if (EXTRUDER_2_AUTO_FAN_PIN != EXTRUDER_0_AUTO_FAN_PIN
&& EXTRUDER_2_AUTO_FAN_PIN != EXTRUDER_1_AUTO_FAN_PIN)
setExtruderAutoFanState(EXTRUDER_2_AUTO_FAN_PIN, (fanState & 4) != 0);
#endif
}
#endif // any extruder auto fan pins set
// ready for eventually parameters adjusting
void resetPID(uint8_t) // only for compiler-warning elimination (if function do nothing)
//void resetPID(uint8_t extruder)
{
}
void manage_heater()
{
#ifdef WATCHDOG
wdt_reset();
#endif //WATCHDOG
float pid_input;
float pid_output;
if(temp_meas_ready != true) //better readability
return;
// more precisely - this condition partially stabilizes time interval for regulation values evaluation (@ ~ 230ms)
updateTemperaturesFromRawValues();
check_max_temp();
check_min_temp();
#ifdef TEMP_RUNAWAY_BED_HYSTERESIS
temp_runaway_check(0, target_temperature_bed, current_temperature_bed, (int)soft_pwm_bed, true);
#endif
for(int e = 0; e < EXTRUDERS; e++)
{
#ifdef TEMP_RUNAWAY_EXTRUDER_HYSTERESIS
temp_runaway_check(e+1, target_temperature[e], current_temperature[e], (int)soft_pwm[e], false);
#endif
#ifdef PIDTEMP
pid_input = current_temperature[e];
#ifndef PID_OPENLOOP
if(target_temperature[e] == 0) {
pid_output = 0;
pid_reset[e] = true;
} else {
pid_error[e] = target_temperature[e] - pid_input;
if(pid_reset[e]) {
iState_sum[e] = 0.0;
dTerm[e] = 0.0; // 'dState_last[e]' initial setting is not necessary (see end of if-statement)
pid_reset[e] = false;
}
#ifndef PonM
pTerm[e] = cs.Kp * pid_error[e];
iState_sum[e] += pid_error[e];
iState_sum[e] = constrain(iState_sum[e], iState_sum_min[e], iState_sum_max[e]);
iTerm[e] = cs.Ki * iState_sum[e];
// PID_K1 defined in Configuration.h in the PID settings
#define K2 (1.0-PID_K1)
dTerm[e] = (cs.Kd * (pid_input - dState_last[e]))*K2 + (PID_K1 * dTerm[e]); // e.g. digital filtration of derivative term changes
pid_output = pTerm[e] + iTerm[e] - dTerm[e]; // subtraction due to "Derivative on Measurement" method (i.e. derivative of input instead derivative of error is used)
if (pid_output > PID_MAX) {
if (pid_error[e] > 0 ) iState_sum[e] -= pid_error[e]; // conditional un-integration
pid_output=PID_MAX;
} else if (pid_output < 0) {
if (pid_error[e] < 0 ) iState_sum[e] -= pid_error[e]; // conditional un-integration
pid_output=0;
}
#else // PonM ("Proportional on Measurement" method)
iState_sum[e] += cs.Ki * pid_error[e];
iState_sum[e] -= cs.Kp * (pid_input - dState_last[e]);
iState_sum[e] = constrain(iState_sum[e], 0, PID_INTEGRAL_DRIVE_MAX);
dTerm[e] = cs.Kd * (pid_input - dState_last[e]);
pid_output = iState_sum[e] - dTerm[e]; // subtraction due to "Derivative on Measurement" method (i.e. derivative of input instead derivative of error is used)
pid_output = constrain(pid_output, 0, PID_MAX);
#endif // PonM
}
dState_last[e] = pid_input;
#else
pid_output = constrain(target_temperature[e], 0, PID_MAX);
#endif //PID_OPENLOOP
#ifdef PID_DEBUG
SERIAL_ECHO_START;
SERIAL_ECHO(" PID_DEBUG ");
SERIAL_ECHO(e);
SERIAL_ECHO(": Input ");
SERIAL_ECHO(pid_input);
SERIAL_ECHO(" Output ");
SERIAL_ECHO(pid_output);
SERIAL_ECHO(" pTerm ");
SERIAL_ECHO(pTerm[e]);
SERIAL_ECHO(" iTerm ");
SERIAL_ECHO(iTerm[e]);
SERIAL_ECHO(" dTerm ");
SERIAL_ECHOLN(-dTerm[e]);
#endif //PID_DEBUG
#else /* PID off */
pid_output = 0;
if(current_temperature[e] < target_temperature[e]) {
pid_output = PID_MAX;
}
#endif
// Check if temperature is within the correct range
if((current_temperature[e] < maxttemp[e]) && (target_temperature[e] != 0))
{
soft_pwm[e] = (int)pid_output >> 1;
}
else
{
soft_pwm[e] = 0;
}
} // End extruder for loop
#define FAN_CHECK_PERIOD 5000 //5s
#define FAN_CHECK_DURATION 100 //100ms
#ifndef DEBUG_DISABLE_FANCHECK
#if (defined(EXTRUDER_0_AUTO_FAN_PIN) && EXTRUDER_0_AUTO_FAN_PIN > -1) || \
(defined(EXTRUDER_1_AUTO_FAN_PIN) && EXTRUDER_1_AUTO_FAN_PIN > -1) || \
(defined(EXTRUDER_2_AUTO_FAN_PIN) && EXTRUDER_2_AUTO_FAN_PIN > -1)
#ifdef FAN_SOFT_PWM
#ifdef FANCHECK
if ((_millis() - extruder_autofan_last_check > FAN_CHECK_PERIOD) && (!fan_measuring)) {
extruder_autofan_last_check = _millis();
fanSpeedBckp = fanSpeedSoftPwm;
if (fanSpeedSoftPwm >= MIN_PRINT_FAN_SPEED) { //if we are in rage where we are doing fan check, set full PWM range for a short time to measure fan RPM by reading tacho signal without modulation by PWM signal
// printf_P(PSTR("fanSpeedSoftPwm 1: %d\n"), fanSpeedSoftPwm);
fanSpeedSoftPwm = 255;
}
fan_measuring = true;
}
if ((_millis() - extruder_autofan_last_check > FAN_CHECK_DURATION) && (fan_measuring)) {
countFanSpeed();
checkFanSpeed();
//printf_P(PSTR("fanSpeedSoftPwm 1: %d\n"), fanSpeedSoftPwm);
fanSpeedSoftPwm = fanSpeedBckp;
//printf_P(PSTR("fan PWM: %d; extr fanSpeed measured: %d; print fan speed measured: %d \n"), fanSpeedBckp, fan_speed[0], fan_speed[1]);
extruder_autofan_last_check = _millis();
fan_measuring = false;
}
#endif //FANCHECK
checkExtruderAutoFans();
#else //FAN_SOFT_PWM
if(_millis() - extruder_autofan_last_check > 1000) // only need to check fan state very infrequently
{
#if (defined(FANCHECK) && ((defined(TACH_0) && (TACH_0 >-1)) || (defined(TACH_1) && (TACH_1 > -1))))
countFanSpeed();
checkFanSpeed();
#endif //(defined(TACH_0) && TACH_0 >-1) || (defined(TACH_1) && TACH_1 > -1)
checkExtruderAutoFans();
extruder_autofan_last_check = _millis();
}
#endif //FAN_SOFT_PWM
#endif
#endif //DEBUG_DISABLE_FANCHECK
#ifndef PIDTEMPBED
if(_millis() - previous_millis_bed_heater < BED_CHECK_INTERVAL)
return;
previous_millis_bed_heater = _millis();
#endif
#if TEMP_SENSOR_BED != 0
#ifdef PIDTEMPBED
pid_input = current_temperature_bed;
#ifndef PID_OPENLOOP
pid_error_bed = target_temperature_bed - pid_input;
pTerm_bed = cs.bedKp * pid_error_bed;
temp_iState_bed += pid_error_bed;
temp_iState_bed = constrain(temp_iState_bed, temp_iState_min_bed, temp_iState_max_bed);
iTerm_bed = cs.bedKi * temp_iState_bed;
//PID_K1 defined in Configuration.h in the PID settings
#define K2 (1.0-PID_K1)
dTerm_bed= (cs.bedKd * (pid_input - temp_dState_bed))*K2 + (PID_K1 * dTerm_bed);
temp_dState_bed = pid_input;
pid_output = pTerm_bed + iTerm_bed - dTerm_bed;
if (pid_output > MAX_BED_POWER) {
if (pid_error_bed > 0 ) temp_iState_bed -= pid_error_bed; // conditional un-integration
pid_output=MAX_BED_POWER;
} else if (pid_output < 0){
if (pid_error_bed < 0 ) temp_iState_bed -= pid_error_bed; // conditional un-integration
pid_output=0;
}
#else
pid_output = constrain(target_temperature_bed, 0, MAX_BED_POWER);
#endif //PID_OPENLOOP
if(current_temperature_bed < BED_MAXTEMP)
{
soft_pwm_bed = (int)pid_output >> 1;
timer02_set_pwm0(soft_pwm_bed << 1);
}
else {
soft_pwm_bed = 0;
timer02_set_pwm0(soft_pwm_bed << 1);
}
#elif !defined(BED_LIMIT_SWITCHING)
// Check if temperature is within the correct range
if(current_temperature_bed < BED_MAXTEMP)
{
if(current_temperature_bed >= target_temperature_bed)
{
soft_pwm_bed = 0;
timer02_set_pwm0(soft_pwm_bed << 1);
}
else
{
soft_pwm_bed = MAX_BED_POWER>>1;
timer02_set_pwm0(soft_pwm_bed << 1);
}
}
else
{
soft_pwm_bed = 0;
timer02_set_pwm0(soft_pwm_bed << 1);
WRITE(HEATER_BED_PIN,LOW);
}
#else //#ifdef BED_LIMIT_SWITCHING
// Check if temperature is within the correct band
if(current_temperature_bed < BED_MAXTEMP)
{
if(current_temperature_bed > target_temperature_bed + BED_HYSTERESIS)
{
soft_pwm_bed = 0;
timer02_set_pwm0(soft_pwm_bed << 1);
}
else if(current_temperature_bed <= target_temperature_bed - BED_HYSTERESIS)
{
soft_pwm_bed = MAX_BED_POWER>>1;
timer02_set_pwm0(soft_pwm_bed << 1);
}
}
else
{
soft_pwm_bed = 0;
timer02_set_pwm0(soft_pwm_bed << 1);
WRITE(HEATER_BED_PIN,LOW);
}
#endif
if(target_temperature_bed==0)
{
soft_pwm_bed = 0;
timer02_set_pwm0(soft_pwm_bed << 1);
}
#endif
host_keepalive();
}
#define PGM_RD_W(x) (short)pgm_read_word(&x)
// Derived from RepRap FiveD extruder::getTemperature()
// For hot end temperature measurement.
static float analog2temp(int raw, uint8_t e) {
if(e >= EXTRUDERS)
{
SERIAL_ERROR_START;
SERIAL_ERROR((int)e);
SERIAL_ERRORLNPGM(" - Invalid extruder number !");
kill(NULL, 6);
return 0.0;
}
#ifdef HEATER_0_USES_MAX6675
if (e == 0)
{
return 0.25 * raw;
}
#endif
if(heater_ttbl_map[e] != NULL)
{
float celsius = 0;
uint8_t i;
short (*tt)[][2] = (short (*)[][2])(heater_ttbl_map[e]);
for (i=1; i<heater_ttbllen_map[e]; i++)
{
if (PGM_RD_W((*tt)[i][0]) > raw)
{
celsius = PGM_RD_W((*tt)[i-1][1]) +
(raw - PGM_RD_W((*tt)[i-1][0])) *
(float)(PGM_RD_W((*tt)[i][1]) - PGM_RD_W((*tt)[i-1][1])) /
(float)(PGM_RD_W((*tt)[i][0]) - PGM_RD_W((*tt)[i-1][0]));
break;
}
}
// Overflow: Set to last value in the table
if (i == heater_ttbllen_map[e]) celsius = PGM_RD_W((*tt)[i-1][1]);
return celsius;
}
return ((raw * ((5.0 * 100.0) / 1024.0) / OVERSAMPLENR) * TEMP_SENSOR_AD595_GAIN) + TEMP_SENSOR_AD595_OFFSET;
}
// Derived from RepRap FiveD extruder::getTemperature()
// For bed temperature measurement.
static float analog2tempBed(int raw) {
#ifdef BED_USES_THERMISTOR
float celsius = 0;
byte i;
for (i=1; i<BEDTEMPTABLE_LEN; i++)
{
if (PGM_RD_W(BEDTEMPTABLE[i][0]) > raw)
{
celsius = PGM_RD_W(BEDTEMPTABLE[i-1][1]) +
(raw - PGM_RD_W(BEDTEMPTABLE[i-1][0])) *
(float)(PGM_RD_W(BEDTEMPTABLE[i][1]) - PGM_RD_W(BEDTEMPTABLE[i-1][1])) /
(float)(PGM_RD_W(BEDTEMPTABLE[i][0]) - PGM_RD_W(BEDTEMPTABLE[i-1][0]));
break;
}
}
// Overflow: Set to last value in the table
if (i == BEDTEMPTABLE_LEN) celsius = PGM_RD_W(BEDTEMPTABLE[i-1][1]);
// temperature offset adjustment
#ifdef BED_OFFSET
float _offset = BED_OFFSET;
float _offset_center = BED_OFFSET_CENTER;
float _offset_start = BED_OFFSET_START;
float _first_koef = (_offset / 2) / (_offset_center - _offset_start);
float _second_koef = (_offset / 2) / (100 - _offset_center);
if (celsius >= _offset_start && celsius <= _offset_center)
{
celsius = celsius + (_first_koef * (celsius - _offset_start));
}
else if (celsius > _offset_center && celsius <= 100)
{
celsius = celsius + (_first_koef * (_offset_center - _offset_start)) + ( _second_koef * ( celsius - ( 100 - _offset_center ) )) ;
}
else if (celsius > 100)
{
celsius = celsius + _offset;
}
#endif
return celsius;
#elif defined BED_USES_AD595
return ((raw * ((5.0 * 100.0) / 1024.0) / OVERSAMPLENR) * TEMP_SENSOR_AD595_GAIN) + TEMP_SENSOR_AD595_OFFSET;
#else
return 0;
#endif
}
#ifdef AMBIENT_THERMISTOR
static float analog2tempAmbient(int raw)
{
float celsius = 0;
byte i;
for (i=1; i<AMBIENTTEMPTABLE_LEN; i++)
{
if (PGM_RD_W(AMBIENTTEMPTABLE[i][0]) > raw)
{
celsius = PGM_RD_W(AMBIENTTEMPTABLE[i-1][1]) +
(raw - PGM_RD_W(AMBIENTTEMPTABLE[i-1][0])) *
(float)(PGM_RD_W(AMBIENTTEMPTABLE[i][1]) - PGM_RD_W(AMBIENTTEMPTABLE[i-1][1])) /
(float)(PGM_RD_W(AMBIENTTEMPTABLE[i][0]) - PGM_RD_W(AMBIENTTEMPTABLE[i-1][0]));
break;
}
}
// Overflow: Set to last value in the table
if (i == AMBIENTTEMPTABLE_LEN) celsius = PGM_RD_W(AMBIENTTEMPTABLE[i-1][1]);
return celsius;
}
#endif //AMBIENT_THERMISTOR
/* Called to get the raw values into the the actual temperatures. The raw values are created in interrupt context,
and this function is called from normal context as it is too slow to run in interrupts and will block the stepper routine otherwise */
static void updateTemperaturesFromRawValues()
{
for(uint8_t e=0;e<EXTRUDERS;e++)