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Firmware2/Marlin/temperature.cpp
Scott Lahteine 3c68be79dc Throw an error in PID_autotune for E < -1
2016-06-09 16:41:53 -07:00

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/**
* Marlin 3D Printer Firmware
* Copyright (C) 2016 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
*
* Based on Sprinter and grbl.
* 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/>.
*
*/
/**
* temperature.cpp - temperature control
*/
#include "Marlin.h"
#include "ultralcd.h"
#include "temperature.h"
#include "language.h"
#include "Sd2PinMap.h"
#if ENABLED(USE_WATCHDOG)
#include "watchdog.h"
#endif
#ifdef K1 // Defined in Configuration.h in the PID settings
#define K2 (1.0-K1)
#endif
#if ENABLED(TEMP_SENSOR_1_AS_REDUNDANT)
static void* heater_ttbl_map[2] = {(void*)HEATER_0_TEMPTABLE, (void*)HEATER_1_TEMPTABLE };
static uint8_t heater_ttbllen_map[2] = { HEATER_0_TEMPTABLE_LEN, HEATER_1_TEMPTABLE_LEN };
#else
static void* heater_ttbl_map[HOTENDS] = ARRAY_BY_HOTENDS((void*)HEATER_0_TEMPTABLE, (void*)HEATER_1_TEMPTABLE, (void*)HEATER_2_TEMPTABLE, (void*)HEATER_3_TEMPTABLE);
static uint8_t heater_ttbllen_map[HOTENDS] = ARRAY_BY_HOTENDS(HEATER_0_TEMPTABLE_LEN, HEATER_1_TEMPTABLE_LEN, HEATER_2_TEMPTABLE_LEN, HEATER_3_TEMPTABLE_LEN);
#endif
Temperature thermalManager;
// public:
int Temperature::current_temperature_raw[HOTENDS] = { 0 };
float Temperature::current_temperature[HOTENDS] = { 0.0 };
int Temperature::target_temperature[HOTENDS] = { 0 };
int Temperature::current_temperature_bed_raw = 0;
float Temperature::current_temperature_bed = 0.0;
int Temperature::target_temperature_bed = 0;
#if ENABLED(TEMP_SENSOR_1_AS_REDUNDANT)
float Temperature::redundant_temperature = 0.0;
#endif
unsigned char Temperature::soft_pwm_bed;
#if ENABLED(FAN_SOFT_PWM)
unsigned char Temperature::fanSpeedSoftPwm[FAN_COUNT];
#endif
#if ENABLED(PIDTEMP)
#if ENABLED(PID_PARAMS_PER_HOTEND)
float Temperature::Kp[HOTENDS] = ARRAY_BY_HOTENDS1(DEFAULT_Kp),
Temperature::Ki[HOTENDS] = ARRAY_BY_HOTENDS1((DEFAULT_Ki) * (PID_dT)),
Temperature::Kd[HOTENDS] = ARRAY_BY_HOTENDS1((DEFAULT_Kd) / (PID_dT));
#if ENABLED(PID_ADD_EXTRUSION_RATE)
float Temperature::Kc[HOTENDS] = ARRAY_BY_HOTENDS1(DEFAULT_Kc);
#endif
#else
float Temperature::Kp = DEFAULT_Kp,
Temperature::Ki = (DEFAULT_Ki) * (PID_dT),
Temperature::Kd = (DEFAULT_Kd) / (PID_dT);
#if ENABLED(PID_ADD_EXTRUSION_RATE)
float Temperature::Kc = DEFAULT_Kc;
#endif
#endif
#endif
#if ENABLED(PIDTEMPBED)
float Temperature::bedKp = DEFAULT_bedKp,
Temperature::bedKi = ((DEFAULT_bedKi) * PID_dT),
Temperature::bedKd = ((DEFAULT_bedKd) / PID_dT);
#endif
#if ENABLED(BABYSTEPPING)
volatile int Temperature::babystepsTodo[3] = { 0 };
#endif
#if ENABLED(THERMAL_PROTECTION_HOTENDS) && WATCH_TEMP_PERIOD > 0
int Temperature::watch_target_temp[HOTENDS] = { 0 };
millis_t Temperature::watch_heater_next_ms[HOTENDS] = { 0 };
#endif
#if ENABLED(THERMAL_PROTECTION_HOTENDS) && WATCH_BED_TEMP_PERIOD > 0
int Temperature::watch_target_bed_temp = 0;
millis_t Temperature::watch_bed_next_ms = 0;
#endif
#if ENABLED(PREVENT_DANGEROUS_EXTRUDE)
float Temperature::extrude_min_temp = EXTRUDE_MINTEMP;
#endif
// private:
#if ENABLED(TEMP_SENSOR_1_AS_REDUNDANT)
int Temperature::redundant_temperature_raw = 0;
float Temperature::redundant_temperature = 0.0;
#endif
volatile bool Temperature::temp_meas_ready = false;
#if ENABLED(PIDTEMP)
float Temperature::temp_iState[HOTENDS] = { 0 };
float Temperature::temp_dState[HOTENDS] = { 0 };
float Temperature::pTerm[HOTENDS];
float Temperature::iTerm[HOTENDS];
float Temperature::dTerm[HOTENDS];
#if ENABLED(PID_ADD_EXTRUSION_RATE)
float Temperature::cTerm[HOTENDS];
long Temperature::last_position[HOTENDS];
long Temperature::lpq[LPQ_MAX_LEN];
int Temperature::lpq_ptr = 0;
#endif
float Temperature::pid_error[HOTENDS];
float Temperature::temp_iState_min[HOTENDS];
float Temperature::temp_iState_max[HOTENDS];
bool Temperature::pid_reset[HOTENDS];
#endif
#if ENABLED(PIDTEMPBED)
float Temperature::temp_iState_bed = { 0 };
float Temperature::temp_dState_bed = { 0 };
float Temperature::pTerm_bed;
float Temperature::iTerm_bed;
float Temperature::dTerm_bed;
float Temperature::pid_error_bed;
float Temperature::temp_iState_min_bed;
float Temperature::temp_iState_max_bed;
#else
millis_t Temperature::next_bed_check_ms;
#endif
unsigned long Temperature::raw_temp_value[4] = { 0 };
unsigned long Temperature::raw_temp_bed_value = 0;
// Init min and max temp with extreme values to prevent false errors during startup
int Temperature::minttemp_raw[HOTENDS] = ARRAY_BY_HOTENDS(HEATER_0_RAW_LO_TEMP , HEATER_1_RAW_LO_TEMP , HEATER_2_RAW_LO_TEMP, HEATER_3_RAW_LO_TEMP);
int Temperature::maxttemp_raw[HOTENDS] = ARRAY_BY_HOTENDS(HEATER_0_RAW_HI_TEMP , HEATER_1_RAW_HI_TEMP , HEATER_2_RAW_HI_TEMP, HEATER_3_RAW_HI_TEMP);
int Temperature::minttemp[HOTENDS] = { 0 };
int Temperature::maxttemp[HOTENDS] = ARRAY_BY_HOTENDS1(16383);
#ifdef BED_MINTEMP
int Temperature::bed_minttemp_raw = HEATER_BED_RAW_LO_TEMP;
#endif
#ifdef BED_MAXTEMP
int Temperature::bed_maxttemp_raw = HEATER_BED_RAW_HI_TEMP;
#endif
#if ENABLED(FILAMENT_WIDTH_SENSOR)
int Temperature::meas_shift_index; // Index of a delayed sample in buffer
#endif
#if HAS_AUTO_FAN
millis_t Temperature::next_auto_fan_check_ms;
#endif
unsigned char Temperature::soft_pwm[HOTENDS];
#if ENABLED(FAN_SOFT_PWM)
unsigned char Temperature::soft_pwm_fan[FAN_COUNT];
#endif
#if ENABLED(FILAMENT_WIDTH_SENSOR)
int Temperature::current_raw_filwidth = 0; //Holds measured filament diameter - one extruder only
#endif
#if HAS_PID_HEATING
void Temperature::PID_autotune(float temp, int hotend, int ncycles, bool set_result/*=false*/) {
float input = 0.0;
int cycles = 0;
bool heating = true;
millis_t temp_ms = millis(), t1 = temp_ms, t2 = temp_ms;
long t_high = 0, t_low = 0;
long bias, d;
float Ku, Tu;
float workKp = 0, workKi = 0, workKd = 0;
float max = 0, min = 10000;
#if HAS_AUTO_FAN
next_auto_fan_check_ms = temp_ms + 2500UL;
#endif
if (hotend >=
#if ENABLED(PIDTEMP)
HOTENDS
#else
0
#endif
|| hotend <
#if ENABLED(PIDTEMPBED)
-1
#else
0
#endif
) {
SERIAL_ECHOLN(MSG_PID_BAD_EXTRUDER_NUM);
return;
}
SERIAL_ECHOLN(MSG_PID_AUTOTUNE_START);
disable_all_heaters(); // switch off all heaters.
#if HAS_PID_FOR_BOTH
if (hotend < 0)
soft_pwm_bed = bias = d = (MAX_BED_POWER) / 2;
else
soft_pwm[hotend] = bias = d = (PID_MAX) / 2;
#elif ENABLED(PIDTEMP)
soft_pwm[hotend] = bias = d = (PID_MAX) / 2;
#else
soft_pwm_bed = bias = d = (MAX_BED_POWER) / 2;
#endif
// PID Tuning loop
for (;;) {
millis_t ms = millis();
if (temp_meas_ready) { // temp sample ready
updateTemperaturesFromRawValues();
input =
#if HAS_PID_FOR_BOTH
hotend < 0 ? current_temperature_bed : current_temperature[hotend]
#elif ENABLED(PIDTEMP)
current_temperature[hotend]
#else
current_temperature_bed
#endif
;
max = max(max, input);
min = min(min, input);
#if HAS_AUTO_FAN
if (ELAPSED(ms, next_auto_fan_check_ms)) {
checkExtruderAutoFans();
next_auto_fan_check_ms = ms + 2500UL;
}
#endif
if (heating && input > temp) {
if (ELAPSED(ms, t2 + 5000UL)) {
heating = false;
#if HAS_PID_FOR_BOTH
if (hotend < 0)
soft_pwm_bed = (bias - d) >> 1;
else
soft_pwm[hotend] = (bias - d) >> 1;
#elif ENABLED(PIDTEMP)
soft_pwm[hotend] = (bias - d) >> 1;
#elif ENABLED(PIDTEMPBED)
soft_pwm_bed = (bias - d) >> 1;
#endif
t1 = ms;
t_high = t1 - t2;
max = temp;
}
}
if (!heating && input < temp) {
if (ELAPSED(ms, t1 + 5000UL)) {
heating = true;
t2 = ms;
t_low = t2 - t1;
if (cycles > 0) {
long max_pow =
#if HAS_PID_FOR_BOTH
hotend < 0 ? MAX_BED_POWER : PID_MAX
#elif ENABLED(PIDTEMP)
PID_MAX
#else
MAX_BED_POWER
#endif
;
bias += (d * (t_high - t_low)) / (t_low + t_high);
bias = constrain(bias, 20, max_pow - 20);
d = (bias > max_pow / 2) ? max_pow - 1 - bias : bias;
SERIAL_PROTOCOLPGM(MSG_BIAS); SERIAL_PROTOCOL(bias);
SERIAL_PROTOCOLPGM(MSG_D); SERIAL_PROTOCOL(d);
SERIAL_PROTOCOLPGM(MSG_T_MIN); SERIAL_PROTOCOL(min);
SERIAL_PROTOCOLPGM(MSG_T_MAX); SERIAL_PROTOCOLLN(max);
if (cycles > 2) {
Ku = (4.0 * d) / (3.14159265 * (max - min) / 2.0);
Tu = ((float)(t_low + t_high) / 1000.0);
SERIAL_PROTOCOLPGM(MSG_KU); SERIAL_PROTOCOL(Ku);
SERIAL_PROTOCOLPGM(MSG_TU); SERIAL_PROTOCOLLN(Tu);
workKp = 0.6 * Ku;
workKi = 2 * workKp / Tu;
workKd = workKp * Tu / 8;
SERIAL_PROTOCOLLNPGM(MSG_CLASSIC_PID);
SERIAL_PROTOCOLPGM(MSG_KP); SERIAL_PROTOCOLLN(workKp);
SERIAL_PROTOCOLPGM(MSG_KI); SERIAL_PROTOCOLLN(workKi);
SERIAL_PROTOCOLPGM(MSG_KD); SERIAL_PROTOCOLLN(workKd);
/**
workKp = 0.33*Ku;
workKi = workKp/Tu;
workKd = workKp*Tu/3;
SERIAL_PROTOCOLLNPGM(" Some overshoot ");
SERIAL_PROTOCOLPGM(" Kp: "); SERIAL_PROTOCOLLN(workKp);
SERIAL_PROTOCOLPGM(" Ki: "); SERIAL_PROTOCOLLN(workKi);
SERIAL_PROTOCOLPGM(" Kd: "); SERIAL_PROTOCOLLN(workKd);
workKp = 0.2*Ku;
workKi = 2*workKp/Tu;
workKd = workKp*Tu/3;
SERIAL_PROTOCOLLNPGM(" No overshoot ");
SERIAL_PROTOCOLPGM(" Kp: "); SERIAL_PROTOCOLLN(workKp);
SERIAL_PROTOCOLPGM(" Ki: "); SERIAL_PROTOCOLLN(workKi);
SERIAL_PROTOCOLPGM(" Kd: "); SERIAL_PROTOCOLLN(workKd);
*/
}
}
#if HAS_PID_FOR_BOTH
if (hotend < 0)
soft_pwm_bed = (bias + d) >> 1;
else
soft_pwm[hotend] = (bias + d) >> 1;
#elif ENABLED(PIDTEMP)
soft_pwm[hotend] = (bias + d) >> 1;
#else
soft_pwm_bed = (bias + d) >> 1;
#endif
cycles++;
min = temp;
}
}
}
#define MAX_OVERSHOOT_PID_AUTOTUNE 20
if (input > temp + MAX_OVERSHOOT_PID_AUTOTUNE) {
SERIAL_PROTOCOLLNPGM(MSG_PID_TEMP_TOO_HIGH);
return;
}
// Every 2 seconds...
if (ELAPSED(ms, temp_ms + 2000UL)) {
#if HAS_TEMP_HOTEND || HAS_TEMP_BED
print_heaterstates();
SERIAL_EOL;
#endif
temp_ms = ms;
} // every 2 seconds
// Over 2 minutes?
if (((ms - t1) + (ms - t2)) > (10L * 60L * 1000L * 2L)) {
SERIAL_PROTOCOLLNPGM(MSG_PID_TIMEOUT);
return;
}
if (cycles > ncycles) {
SERIAL_PROTOCOLLNPGM(MSG_PID_AUTOTUNE_FINISHED);
#if HAS_PID_FOR_BOTH
const char* estring = hotend < 0 ? "bed" : "";
SERIAL_PROTOCOLPGM("#define DEFAULT_"); SERIAL_PROTOCOL(estring); SERIAL_PROTOCOLPGM("Kp "); SERIAL_PROTOCOLLN(workKp);
SERIAL_PROTOCOLPGM("#define DEFAULT_"); SERIAL_PROTOCOL(estring); SERIAL_PROTOCOLPGM("Ki "); SERIAL_PROTOCOLLN(workKi);
SERIAL_PROTOCOLPGM("#define DEFAULT_"); SERIAL_PROTOCOL(estring); SERIAL_PROTOCOLPGM("Kd "); SERIAL_PROTOCOLLN(workKd);
#elif ENABLED(PIDTEMP)
SERIAL_PROTOCOLPGM("#define DEFAULT_Kp "); SERIAL_PROTOCOLLN(workKp);
SERIAL_PROTOCOLPGM("#define DEFAULT_Ki "); SERIAL_PROTOCOLLN(workKi);
SERIAL_PROTOCOLPGM("#define DEFAULT_Kd "); SERIAL_PROTOCOLLN(workKd);
#else
SERIAL_PROTOCOLPGM("#define DEFAULT_bedKp "); SERIAL_PROTOCOLLN(workKp);
SERIAL_PROTOCOLPGM("#define DEFAULT_bedKi "); SERIAL_PROTOCOLLN(workKi);
SERIAL_PROTOCOLPGM("#define DEFAULT_bedKd "); SERIAL_PROTOCOLLN(workKd);
#endif
#define _SET_BED_PID() \
bedKp = workKp; \
bedKi = scalePID_i(workKi); \
bedKd = scalePID_d(workKd); \
updatePID()
#define _SET_EXTRUDER_PID() \
PID_PARAM(Kp, hotend) = workKp; \
PID_PARAM(Ki, hotend) = scalePID_i(workKi); \
PID_PARAM(Kd, hotend) = scalePID_d(workKd); \
updatePID()
// Use the result? (As with "M303 U1")
if (set_result) {
#if HAS_PID_FOR_BOTH
if (hotend < 0) {
_SET_BED_PID();
}
else {
_SET_EXTRUDER_PID();
}
#elif ENABLED(PIDTEMP)
_SET_EXTRUDER_PID();
#else
_SET_BED_PID();
#endif
}
return;
}
lcd_update();
}
}
#endif // HAS_PID_HEATING
/**
* Class and Instance Methods
*/
Temperature::Temperature() { }
void Temperature::updatePID() {
#if ENABLED(PIDTEMP)
for (int e = 0; e < HOTENDS; e++) {
temp_iState_max[e] = (PID_INTEGRAL_DRIVE_MAX) / PID_PARAM(Ki, e);
#if ENABLED(PID_ADD_EXTRUSION_RATE)
last_position[e] = 0;
#endif
}
#endif
#if ENABLED(PIDTEMPBED)
temp_iState_max_bed = (PID_BED_INTEGRAL_DRIVE_MAX) / bedKi;
#endif
}
int Temperature::getHeaterPower(int heater) {
return heater < 0 ? soft_pwm_bed : soft_pwm[heater];
}
#if HAS_AUTO_FAN
void Temperature::checkExtruderAutoFans() {
const int8_t fanPin[] = { EXTRUDER_0_AUTO_FAN_PIN, EXTRUDER_1_AUTO_FAN_PIN, EXTRUDER_2_AUTO_FAN_PIN, EXTRUDER_3_AUTO_FAN_PIN };
const int fanBit[] = { 0,
EXTRUDER_1_AUTO_FAN_PIN == EXTRUDER_0_AUTO_FAN_PIN ? 0 : 1,
EXTRUDER_2_AUTO_FAN_PIN == EXTRUDER_0_AUTO_FAN_PIN ? 0 :
EXTRUDER_2_AUTO_FAN_PIN == EXTRUDER_1_AUTO_FAN_PIN ? 1 : 2,
EXTRUDER_3_AUTO_FAN_PIN == EXTRUDER_0_AUTO_FAN_PIN ? 0 :
EXTRUDER_3_AUTO_FAN_PIN == EXTRUDER_1_AUTO_FAN_PIN ? 1 :
EXTRUDER_3_AUTO_FAN_PIN == EXTRUDER_2_AUTO_FAN_PIN ? 2 : 3
};
uint8_t fanState = 0;
for (int f = 0; f <= HOTENDS; f++) {
if (current_temperature[f] > EXTRUDER_AUTO_FAN_TEMPERATURE)
SBI(fanState, fanBit[f]);
}
uint8_t fanDone = 0;
for (int f = 0; f <= 3; f++) {
int8_t pin = fanPin[f];
if (pin >= 0 && !TEST(fanDone, fanBit[f])) {
unsigned char newFanSpeed = TEST(fanState, fanBit[f]) ? EXTRUDER_AUTO_FAN_SPEED : 0;
// this idiom allows both digital and PWM fan outputs (see M42 handling).
digitalWrite(pin, newFanSpeed);
analogWrite(pin, newFanSpeed);
SBI(fanDone, fanBit[f]);
}
}
}
#endif // HAS_AUTO_FAN
//
// Temperature Error Handlers
//
void Temperature::_temp_error(int e, const char* serial_msg, const char* lcd_msg) {
static bool killed = false;
if (IsRunning()) {
SERIAL_ERROR_START;
serialprintPGM(serial_msg);
SERIAL_ERRORPGM(MSG_STOPPED_HEATER);
if (e >= 0) SERIAL_ERRORLN((int)e); else SERIAL_ERRORLNPGM(MSG_HEATER_BED);
}
#if DISABLED(BOGUS_TEMPERATURE_FAILSAFE_OVERRIDE)
if (!killed) {
Running = false;
killed = true;
kill(lcd_msg);
}
else
disable_all_heaters(); // paranoia
#endif
}
void Temperature::max_temp_error(uint8_t e) {
_temp_error(e, PSTR(MSG_T_MAXTEMP), PSTR(MSG_ERR_MAXTEMP));
}
void Temperature::min_temp_error(uint8_t e) {
_temp_error(e, PSTR(MSG_T_MINTEMP), PSTR(MSG_ERR_MINTEMP));
}
float Temperature::get_pid_output(int e) {
float pid_output;
#if ENABLED(PIDTEMP)
#if DISABLED(PID_OPENLOOP)
pid_error[e] = target_temperature[e] - current_temperature[e];
dTerm[e] = K2 * PID_PARAM(Kd, e) * (current_temperature[e] - temp_dState[e]) + K1 * dTerm[e];
temp_dState[e] = current_temperature[e];
if (pid_error[e] > PID_FUNCTIONAL_RANGE) {
pid_output = BANG_MAX;
pid_reset[e] = true;
}
else if (pid_error[e] < -(PID_FUNCTIONAL_RANGE) || target_temperature[e] == 0) {
pid_output = 0;
pid_reset[e] = true;
}
else {
if (pid_reset[e]) {
temp_iState[e] = 0.0;
pid_reset[e] = false;
}
pTerm[e] = PID_PARAM(Kp, e) * pid_error[e];
temp_iState[e] += pid_error[e];
temp_iState[e] = constrain(temp_iState[e], temp_iState_min[e], temp_iState_max[e]);
iTerm[e] = PID_PARAM(Ki, e) * temp_iState[e];
pid_output = pTerm[e] + iTerm[e] - dTerm[e];
#if ENABLED(SINGLENOZZLE)
#define _NOZZLE_TEST true
#define _NOZZLE_EXTRUDER active_extruder
#define _CTERM_INDEX 0
#else
#define _NOZZLE_TEST e == active_extruder
#define _NOZZLE_EXTRUDER e
#define _CTERM_INDEX e
#endif
#if ENABLED(PID_ADD_EXTRUSION_RATE)
cTerm[_CTERM_INDEX] = 0;
if (_NOZZLE_TEST) {
long e_position = stepper.position(E_AXIS);
if (e_position > last_position[_NOZZLE_EXTRUDER]) {
lpq[lpq_ptr++] = e_position - last_position[_NOZZLE_EXTRUDER];
last_position[_NOZZLE_EXTRUDER] = e_position;
}
else {
lpq[lpq_ptr++] = 0;
}
if (lpq_ptr >= lpq_len) lpq_ptr = 0;
cTerm[_CTERM_INDEX] = (lpq[lpq_ptr] / planner.axis_steps_per_unit[E_AXIS]) * PID_PARAM(Kc, e);
pid_output += cTerm[e];
}
#endif //PID_ADD_EXTRUSION_RATE
if (pid_output > PID_MAX) {
if (pid_error[e] > 0) temp_iState[e] -= pid_error[e]; // conditional un-integration
pid_output = PID_MAX;
}
else if (pid_output < 0) {
if (pid_error[e] < 0) temp_iState[e] -= pid_error[e]; // conditional un-integration
pid_output = 0;
}
}
#else
pid_output = constrain(target_temperature[e], 0, PID_MAX);
#endif //PID_OPENLOOP
#if ENABLED(PID_DEBUG)
SERIAL_ECHO_START;
SERIAL_ECHOPAIR(MSG_PID_DEBUG, e);
SERIAL_ECHOPAIR(MSG_PID_DEBUG_INPUT, current_temperature[e]);
SERIAL_ECHOPAIR(MSG_PID_DEBUG_OUTPUT, pid_output);
SERIAL_ECHOPAIR(MSG_PID_DEBUG_PTERM, pTerm[e]);
SERIAL_ECHOPAIR(MSG_PID_DEBUG_ITERM, iTerm[e]);
SERIAL_ECHOPAIR(MSG_PID_DEBUG_DTERM, dTerm[e]);
#if ENABLED(PID_ADD_EXTRUSION_RATE)
SERIAL_ECHOPAIR(MSG_PID_DEBUG_CTERM, cTerm[e]);
#endif
SERIAL_EOL;
#endif //PID_DEBUG
#else /* PID off */
pid_output = (current_temperature[e] < target_temperature[e]) ? PID_MAX : 0;
#endif
return pid_output;
}
#if ENABLED(PIDTEMPBED)
float Temperature::get_pid_output_bed() {
float pid_output;
#if DISABLED(PID_OPENLOOP)
pid_error_bed = target_temperature_bed - current_temperature_bed;
pTerm_bed = 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 = bedKi * temp_iState_bed;
dTerm_bed = K2 * bedKd * (current_temperature_bed - temp_dState_bed) + K1 * dTerm_bed;
temp_dState_bed = current_temperature_bed;
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 ENABLED(PID_BED_DEBUG)
SERIAL_ECHO_START;
SERIAL_ECHO(" PID_BED_DEBUG ");
SERIAL_ECHO(": Input ");
SERIAL_ECHO(current_temperature_bed);
SERIAL_ECHO(" Output ");
SERIAL_ECHO(pid_output);
SERIAL_ECHO(" pTerm ");
SERIAL_ECHO(pTerm_bed);
SERIAL_ECHO(" iTerm ");
SERIAL_ECHO(iTerm_bed);
SERIAL_ECHO(" dTerm ");
SERIAL_ECHOLN(dTerm_bed);
#endif //PID_BED_DEBUG
return pid_output;
}
#endif //PIDTEMPBED
/**
* Manage heating activities for extruder hot-ends and a heated bed
* - Acquire updated temperature readings
* - Also resets the watchdog timer
* - Invoke thermal runaway protection
* - Manage extruder auto-fan
* - Apply filament width to the extrusion rate (may move)
* - Update the heated bed PID output value
*/
void Temperature::manage_heater() {
if (!temp_meas_ready) return;
updateTemperaturesFromRawValues(); // also resets the watchdog
#if ENABLED(HEATER_0_USES_MAX6675)
float ct = current_temperature[0];
if (ct > min(HEATER_0_MAXTEMP, 1023)) max_temp_error(0);
if (ct < max(HEATER_0_MINTEMP, 0.01)) min_temp_error(0);
#endif
#if (ENABLED(THERMAL_PROTECTION_HOTENDS) && WATCH_TEMP_PERIOD > 0) || (ENABLED(THERMAL_PROTECTION_BED) && WATCH_BED_TEMP_PERIOD > 0) || DISABLED(PIDTEMPBED) || HAS_AUTO_FAN
millis_t ms = millis();
#endif
// Loop through all hotends
for (int e = 0; e < HOTENDS; e++) {
#if ENABLED(THERMAL_PROTECTION_HOTENDS)
thermal_runaway_protection(&thermal_runaway_state_machine[e], &thermal_runaway_timer[e], current_temperature[e], target_temperature[e], e, THERMAL_PROTECTION_PERIOD, THERMAL_PROTECTION_HYSTERESIS);
#endif
float pid_output = get_pid_output(e);
// Check if temperature is within the correct range
soft_pwm[e] = current_temperature[e] > minttemp[e] && current_temperature[e] < maxttemp[e] ? (int)pid_output >> 1 : 0;
// Check if the temperature is failing to increase
#if ENABLED(THERMAL_PROTECTION_HOTENDS) && WATCH_TEMP_PERIOD > 0
// Is it time to check this extruder's heater?
if (watch_heater_next_ms[e] && ELAPSED(ms, watch_heater_next_ms[e])) {
// Has it failed to increase enough?
if (degHotend(e) < watch_target_temp[e]) {
// Stop!
_temp_error(e, PSTR(MSG_T_HEATING_FAILED), PSTR(MSG_HEATING_FAILED_LCD));
}
else {
// Start again if the target is still far off
start_watching_heater(e);
}
}
#endif // THERMAL_PROTECTION_HOTENDS
// Check if the temperature is failing to increase
#if ENABLED(THERMAL_PROTECTION_BED) && WATCH_BED_TEMP_PERIOD > 0
// Is it time to check the bed?
if (watch_bed_next_ms && ELAPSED(ms, watch_bed_next_ms)) {
// Has it failed to increase enough?
if (degBed() < watch_target_bed_temp) {
// Stop!
_temp_error(-1, PSTR(MSG_T_HEATING_FAILED), PSTR(MSG_HEATING_FAILED_LCD));
}
else {
// Start again if the target is still far off
start_watching_bed();
}
}
#endif // THERMAL_PROTECTION_HOTENDS
#if ENABLED(TEMP_SENSOR_1_AS_REDUNDANT)
if (fabs(current_temperature[0] - redundant_temperature) > MAX_REDUNDANT_TEMP_SENSOR_DIFF) {
_temp_error(0, PSTR(MSG_REDUNDANCY), PSTR(MSG_ERR_REDUNDANT_TEMP));
}
#endif
} // Hotends Loop
#if HAS_AUTO_FAN
if (ELAPSED(ms, next_auto_fan_check_ms)) { // only need to check fan state very infrequently
checkExtruderAutoFans();
next_auto_fan_check_ms = ms + 2500UL;
}
#endif
// Control the extruder rate based on the width sensor
#if ENABLED(FILAMENT_WIDTH_SENSOR)
if (filament_sensor) {
meas_shift_index = filwidth_delay_index1 - meas_delay_cm;
if (meas_shift_index < 0) meas_shift_index += MAX_MEASUREMENT_DELAY + 1; //loop around buffer if needed
// Get the delayed info and add 100 to reconstitute to a percent of
// the nominal filament diameter then square it to get an area
meas_shift_index = constrain(meas_shift_index, 0, MAX_MEASUREMENT_DELAY);
float vm = pow((measurement_delay[meas_shift_index] + 100.0) / 100.0, 2);
NOLESS(vm, 0.01);
volumetric_multiplier[FILAMENT_SENSOR_EXTRUDER_NUM] = vm;
}
#endif //FILAMENT_WIDTH_SENSOR
#if DISABLED(PIDTEMPBED)
if (PENDING(ms, next_bed_check_ms)) return;
next_bed_check_ms = ms + BED_CHECK_INTERVAL;
#endif
#if TEMP_SENSOR_BED != 0
#if HAS_THERMALLY_PROTECTED_BED
thermal_runaway_protection(&thermal_runaway_bed_state_machine, &thermal_runaway_bed_timer, current_temperature_bed, target_temperature_bed, -1, THERMAL_PROTECTION_BED_PERIOD, THERMAL_PROTECTION_BED_HYSTERESIS);
#endif
#if ENABLED(PIDTEMPBED)
float pid_output = get_pid_output_bed();
soft_pwm_bed = current_temperature_bed > BED_MINTEMP && current_temperature_bed < BED_MAXTEMP ? (int)pid_output >> 1 : 0;
#elif ENABLED(BED_LIMIT_SWITCHING)
// Check if temperature is within the correct band
if (current_temperature_bed > BED_MINTEMP && current_temperature_bed < BED_MAXTEMP) {
if (current_temperature_bed >= target_temperature_bed + BED_HYSTERESIS)
soft_pwm_bed = 0;
else if (current_temperature_bed <= target_temperature_bed - (BED_HYSTERESIS))
soft_pwm_bed = MAX_BED_POWER >> 1;
}
else {
soft_pwm_bed = 0;
WRITE_HEATER_BED(LOW);
}
#else // !PIDTEMPBED && !BED_LIMIT_SWITCHING
// Check if temperature is within the correct range
if (current_temperature_bed > BED_MINTEMP && current_temperature_bed < BED_MAXTEMP) {
soft_pwm_bed = current_temperature_bed < target_temperature_bed ? MAX_BED_POWER >> 1 : 0;
}
else {
soft_pwm_bed = 0;
WRITE_HEATER_BED(LOW);
}
#endif
#endif //TEMP_SENSOR_BED != 0
}
#define PGM_RD_W(x) (short)pgm_read_word(&x)
// Derived from RepRap FiveD extruder::getTemperature()
// For hot end temperature measurement.
float Temperature::analog2temp(int raw, uint8_t e) {
#if ENABLED(TEMP_SENSOR_1_AS_REDUNDANT)
if (e > HOTENDS)
#else
if (e >= HOTENDS)
#endif
{
SERIAL_ERROR_START;
SERIAL_ERROR((int)e);
SERIAL_ERRORLNPGM(MSG_INVALID_EXTRUDER_NUM);
kill(PSTR(MSG_KILLED));
return 0.0;
}
#if ENABLED(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.
float Temperature::analog2tempBed(int raw) {
#if ENABLED(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]);
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
UNUSED(raw);
return 0;
#endif
}
/**
* Get the raw values into the actual temperatures.
* The raw values are created in interrupt context,
* and this function is called from normal context
* as it would block the stepper routine.
*/
void Temperature::updateTemperaturesFromRawValues() {
#if ENABLED(HEATER_0_USES_MAX6675)
current_temperature_raw[0] = read_max6675();
#endif
for (uint8_t e = 0; e < HOTENDS; e++) {
current_temperature[e] = Temperature::analog2temp(current_temperature_raw[e], e);
}
current_temperature_bed = Temperature::analog2tempBed(current_temperature_bed_raw);
#if ENABLED(TEMP_SENSOR_1_AS_REDUNDANT)
redundant_temperature = Temperature::analog2temp(redundant_temperature_raw, 1);
#endif
#if ENABLED(FILAMENT_WIDTH_SENSOR)
filament_width_meas = analog2widthFil();
#endif
#if ENABLED(USE_WATCHDOG)
// Reset the watchdog after we know we have a temperature measurement.
watchdog_reset();
#endif
CRITICAL_SECTION_START;
temp_meas_ready = false;
CRITICAL_SECTION_END;
}
#if ENABLED(FILAMENT_WIDTH_SENSOR)
// Convert raw Filament Width to millimeters
float Temperature::analog2widthFil() {
return current_raw_filwidth / 16383.0 * 5.0;
//return current_raw_filwidth;
}
// Convert raw Filament Width to a ratio
int Temperature::widthFil_to_size_ratio() {
float temp = filament_width_meas;
if (temp < MEASURED_LOWER_LIMIT) temp = filament_width_nominal; //assume sensor cut out
else NOMORE(temp, MEASURED_UPPER_LIMIT);
return filament_width_nominal / temp * 100;
}
#endif
/**
* Initialize the temperature manager
* The manager is implemented by periodic calls to manage_heater()
*/
void Temperature::init() {
#if MB(RUMBA) && ((TEMP_SENSOR_0==-1)||(TEMP_SENSOR_1==-1)||(TEMP_SENSOR_2==-1)||(TEMP_SENSOR_BED==-1))
//disable RUMBA JTAG in case the thermocouple extension is plugged on top of JTAG connector
MCUCR = _BV(JTD);
MCUCR = _BV(JTD);
#endif
// Finish init of mult hotend arrays
for (int e = 0; e < HOTENDS; e++) {
// populate with the first value
maxttemp[e] = maxttemp[0];
#if ENABLED(PIDTEMP)
temp_iState_min[e] = 0.0;
temp_iState_max[e] = (PID_INTEGRAL_DRIVE_MAX) / PID_PARAM(Ki, e);
#if ENABLED(PID_ADD_EXTRUSION_RATE)
last_position[e] = 0;
#endif
#endif //PIDTEMP
#if ENABLED(PIDTEMPBED)
temp_iState_min_bed = 0.0;
temp_iState_max_bed = (PID_BED_INTEGRAL_DRIVE_MAX) / bedKi;
#endif //PIDTEMPBED
}
#if HAS_HEATER_0
SET_OUTPUT(HEATER_0_PIN);
#endif
#if HAS_HEATER_1
SET_OUTPUT(HEATER_1_PIN);
#endif
#if HAS_HEATER_2
SET_OUTPUT(HEATER_2_PIN);
#endif
#if HAS_HEATER_3
SET_OUTPUT(HEATER_3_PIN);
#endif
#if HAS_HEATER_BED
SET_OUTPUT(HEATER_BED_PIN);
#endif
#if ENABLED(FAST_PWM_FAN) || ENABLED(FAN_SOFT_PWM)
#if HAS_FAN0
SET_OUTPUT(FAN_PIN);
#if ENABLED(FAST_PWM_FAN)
setPwmFrequency(FAN_PIN, 1); // No prescaling. Pwm frequency = F_CPU/256/8
#endif
#if ENABLED(FAN_SOFT_PWM)
soft_pwm_fan[0] = fanSpeedSoftPwm[0] / 2;
#endif
#endif
#if HAS_FAN1
SET_OUTPUT(FAN1_PIN);
#if ENABLED(FAST_PWM_FAN)
setPwmFrequency(FAN1_PIN, 1); // No prescaling. Pwm frequency = F_CPU/256/8
#endif
#if ENABLED(FAN_SOFT_PWM)
soft_pwm_fan[1] = fanSpeedSoftPwm[1] / 2;
#endif
#endif
#if HAS_FAN2
SET_OUTPUT(FAN2_PIN);
#if ENABLED(FAST_PWM_FAN)
setPwmFrequency(FAN2_PIN, 1); // No prescaling. Pwm frequency = F_CPU/256/8
#endif
#if ENABLED(FAN_SOFT_PWM)
soft_pwm_fan[2] = fanSpeedSoftPwm[2] / 2;
#endif
#endif
#endif // FAST_PWM_FAN || FAN_SOFT_PWM
#if ENABLED(HEATER_0_USES_MAX6675)
#if DISABLED(SDSUPPORT)
OUT_WRITE(SCK_PIN, LOW);
OUT_WRITE(MOSI_PIN, HIGH);
OUT_WRITE(MISO_PIN, HIGH);
#else
pinMode(SS_PIN, OUTPUT);
digitalWrite(SS_PIN, HIGH);
#endif
OUT_WRITE(MAX6675_SS, HIGH);
#endif //HEATER_0_USES_MAX6675
#ifdef DIDR2
#define ANALOG_SELECT(pin) do{ if (pin < 8) SBI(DIDR0, pin); else SBI(DIDR2, pin - 8); }while(0)
#else
#define ANALOG_SELECT(pin) do{ SBI(DIDR0, pin); }while(0)
#endif
// Set analog inputs
ADCSRA = _BV(ADEN) | _BV(ADSC) | _BV(ADIF) | 0x07;
DIDR0 = 0;
#ifdef DIDR2
DIDR2 = 0;
#endif
#if HAS_TEMP_0
ANALOG_SELECT(TEMP_0_PIN);
#endif
#if HAS_TEMP_1
ANALOG_SELECT(TEMP_1_PIN);
#endif
#if HAS_TEMP_2
ANALOG_SELECT(TEMP_2_PIN);
#endif
#if HAS_TEMP_3
ANALOG_SELECT(TEMP_3_PIN);
#endif
#if HAS_TEMP_BED
ANALOG_SELECT(TEMP_BED_PIN);
#endif
#if ENABLED(FILAMENT_WIDTH_SENSOR)
ANALOG_SELECT(FILWIDTH_PIN);
#endif
#if HAS_AUTO_FAN_0
pinMode(EXTRUDER_0_AUTO_FAN_PIN, OUTPUT);
#endif
#if HAS_AUTO_FAN_1 && (EXTRUDER_1_AUTO_FAN_PIN != EXTRUDER_0_AUTO_FAN_PIN)
pinMode(EXTRUDER_1_AUTO_FAN_PIN, OUTPUT);
#endif
#if HAS_AUTO_FAN_2 && (EXTRUDER_2_AUTO_FAN_PIN != EXTRUDER_0_AUTO_FAN_PIN) && (EXTRUDER_2_AUTO_FAN_PIN != EXTRUDER_1_AUTO_FAN_PIN)
pinMode(EXTRUDER_2_AUTO_FAN_PIN, OUTPUT);
#endif
#if HAS_AUTO_FAN_3 && (EXTRUDER_3_AUTO_FAN_PIN != EXTRUDER_0_AUTO_FAN_PIN) && (EXTRUDER_3_AUTO_FAN_PIN != EXTRUDER_1_AUTO_FAN_PIN) && (EXTRUDER_3_AUTO_FAN_PIN != EXTRUDER_2_AUTO_FAN_PIN)
pinMode(EXTRUDER_3_AUTO_FAN_PIN, OUTPUT);
#endif
// Use timer0 for temperature measurement
// Interleave temperature interrupt with millies interrupt
OCR0B = 128;
SBI(TIMSK0, OCIE0B);
// Wait for temperature measurement to settle
delay(250);
#define TEMP_MIN_ROUTINE(NR) \
minttemp[NR] = HEATER_ ## NR ## _MINTEMP; \
while(analog2temp(minttemp_raw[NR], NR) < HEATER_ ## NR ## _MINTEMP) { \
if (HEATER_ ## NR ## _RAW_LO_TEMP < HEATER_ ## NR ## _RAW_HI_TEMP) \
minttemp_raw[NR] += OVERSAMPLENR; \
else \
minttemp_raw[NR] -= OVERSAMPLENR; \
}
#define TEMP_MAX_ROUTINE(NR) \
maxttemp[NR] = HEATER_ ## NR ## _MAXTEMP; \
while(analog2temp(maxttemp_raw[NR], NR) > HEATER_ ## NR ## _MAXTEMP) { \
if (HEATER_ ## NR ## _RAW_LO_TEMP < HEATER_ ## NR ## _RAW_HI_TEMP) \
maxttemp_raw[NR] -= OVERSAMPLENR; \
else \
maxttemp_raw[NR] += OVERSAMPLENR; \
}
#ifdef HEATER_0_MINTEMP
TEMP_MIN_ROUTINE(0);
#endif
#ifdef HEATER_0_MAXTEMP
TEMP_MAX_ROUTINE(0);
#endif
#if HOTENDS > 1
#ifdef HEATER_1_MINTEMP
TEMP_MIN_ROUTINE(1);
#endif
#ifdef HEATER_1_MAXTEMP
TEMP_MAX_ROUTINE(1);
#endif
#if HOTENDS > 2
#ifdef HEATER_2_MINTEMP
TEMP_MIN_ROUTINE(2);
#endif
#ifdef HEATER_2_MAXTEMP
TEMP_MAX_ROUTINE(2);
#endif
#if HOTENDS > 3
#ifdef HEATER_3_MINTEMP
TEMP_MIN_ROUTINE(3);
#endif
#ifdef HEATER_3_MAXTEMP
TEMP_MAX_ROUTINE(3);
#endif
#endif // HOTENDS > 3
#endif // HOTENDS > 2
#endif // HOTENDS > 1
#ifdef BED_MINTEMP
while(analog2tempBed(bed_minttemp_raw) < BED_MINTEMP) {
#if HEATER_BED_RAW_LO_TEMP < HEATER_BED_RAW_HI_TEMP
bed_minttemp_raw += OVERSAMPLENR;
#else
bed_minttemp_raw -= OVERSAMPLENR;
#endif
}
#endif //BED_MINTEMP
#ifdef BED_MAXTEMP
while (analog2tempBed(bed_maxttemp_raw) > BED_MAXTEMP) {
#if HEATER_BED_RAW_LO_TEMP < HEATER_BED_RAW_HI_TEMP
bed_maxttemp_raw -= OVERSAMPLENR;
#else
bed_maxttemp_raw += OVERSAMPLENR;
#endif
}
#endif //BED_MAXTEMP
}
#if ENABLED(THERMAL_PROTECTION_HOTENDS) && WATCH_TEMP_PERIOD > 0
/**
* Start Heating Sanity Check for hotends that are below
* their target temperature by a configurable margin.
* This is called when the temperature is set. (M104, M109)
*/
void Temperature::start_watching_heater(int e) {
if (degHotend(e) < degTargetHotend(e) - (WATCH_TEMP_INCREASE + TEMP_HYSTERESIS + 1)) {
watch_target_temp[e] = degHotend(e) + WATCH_TEMP_INCREASE;
watch_heater_next_ms[e] = millis() + (WATCH_TEMP_PERIOD) * 1000UL;
}
else
watch_heater_next_ms[e] = 0;
}
#endif
#if ENABLED(THERMAL_PROTECTION_BED) && WATCH_BED_TEMP_PERIOD > 0
/**
* Start Heating Sanity Check for hotends that are below
* their target temperature by a configurable margin.
* This is called when the temperature is set. (M140, M190)
*/
void Temperature::start_watching_bed() {
if (degBed() < degTargetBed() - (WATCH_BED_TEMP_INCREASE + TEMP_BED_HYSTERESIS + 1)) {
watch_target_bed_temp = degBed() + WATCH_BED_TEMP_INCREASE;
watch_bed_next_ms = millis() + (WATCH_BED_TEMP_PERIOD) * 1000UL;
}
else
watch_bed_next_ms = 0;
}
#endif
#if ENABLED(THERMAL_PROTECTION_HOTENDS) || HAS_THERMALLY_PROTECTED_BED
#if ENABLED(THERMAL_PROTECTION_HOTENDS)
Temperature::TRState Temperature::thermal_runaway_state_machine[HOTENDS] = { TRInactive };
millis_t Temperature::thermal_runaway_timer[HOTENDS] = { 0 };
#endif
#if HAS_THERMALLY_PROTECTED_BED
Temperature::TRState Temperature::thermal_runaway_bed_state_machine = TRInactive;
millis_t Temperature::thermal_runaway_bed_timer;
#endif
void Temperature::thermal_runaway_protection(Temperature::TRState* state, millis_t* timer, float temperature, float target_temperature, int heater_id, int period_seconds, int hysteresis_degc) {
static float tr_target_temperature[HOTENDS + 1] = { 0.0 };
/**
SERIAL_ECHO_START;
SERIAL_ECHOPGM("Thermal Thermal Runaway Running. Heater ID: ");
if (heater_id < 0) SERIAL_ECHOPGM("bed"); else SERIAL_ECHO(heater_id);
SERIAL_ECHOPAIR(" ; State:", *state);
SERIAL_ECHOPAIR(" ; Timer:", *timer);
SERIAL_ECHOPAIR(" ; Temperature:", temperature);
SERIAL_ECHOPAIR(" ; Target Temp:", target_temperature);
SERIAL_EOL;
*/
int heater_index = heater_id >= 0 ? heater_id : HOTENDS;
// If the target temperature changes, restart
if (tr_target_temperature[heater_index] != target_temperature) {
tr_target_temperature[heater_index] = target_temperature;
*state = target_temperature > 0 ? TRFirstHeating : TRInactive;
}
switch (*state) {
// Inactive state waits for a target temperature to be set
case TRInactive: break;
// When first heating, wait for the temperature to be reached then go to Stable state
case TRFirstHeating:
if (temperature < tr_target_temperature[heater_index]) break;
*state = TRStable;
// While the temperature is stable watch for a bad temperature
case TRStable:
if (temperature < tr_target_temperature[heater_index] - hysteresis_degc && ELAPSED(millis(), *timer))
*state = TRRunaway;
else {
*timer = millis() + period_seconds * 1000UL;
break;
}
case TRRunaway:
_temp_error(heater_id, PSTR(MSG_T_THERMAL_RUNAWAY), PSTR(MSG_THERMAL_RUNAWAY));
}
}
#endif // THERMAL_PROTECTION_HOTENDS || THERMAL_PROTECTION_BED
void Temperature::disable_all_heaters() {
for (int i = 0; i < HOTENDS; i++) setTargetHotend(0, i);
setTargetBed(0);
// If all heaters go down then for sure our print job has stopped
print_job_timer.stop();
#define DISABLE_HEATER(NR) { \
setTargetHotend(NR, 0); \
soft_pwm[NR] = 0; \
WRITE_HEATER_ ## NR (LOW); \
}
#if HAS_TEMP_HOTEND
setTargetHotend(0, 0);
soft_pwm[0] = 0;
WRITE_HEATER_0P(LOW); // Should HEATERS_PARALLEL apply here? Then change to DISABLE_HEATER(0)
#endif
#if HOTENDS > 1 && HAS_TEMP_1
DISABLE_HEATER(1);
#endif
#if HOTENDS > 2 && HAS_TEMP_2
DISABLE_HEATER(2);
#endif
#if HOTENDS > 3 && HAS_TEMP_3
DISABLE_HEATER(3);
#endif
#if HAS_TEMP_BED
target_temperature_bed = 0;
soft_pwm_bed = 0;
#if HAS_HEATER_BED
WRITE_HEATER_BED(LOW);
#endif
#endif
}
#if ENABLED(HEATER_0_USES_MAX6675)
#define MAX6675_HEAT_INTERVAL 250u
#if ENABLED(MAX6675_IS_MAX31855)
uint32_t max6675_temp = 2000;
#define MAX6675_ERROR_MASK 7
#define MAX6675_DISCARD_BITS 18
#define MAX6675_SPEED_BITS (_BV(SPR1)) // clock ÷ 64
#else
uint16_t max6675_temp = 2000;
#define MAX6675_ERROR_MASK 4
#define MAX6675_DISCARD_BITS 3
#define MAX6675_SPEED_BITS (_BV(SPR0)) // clock ÷ 16
#endif
int Temperature::read_max6675() {
static millis_t next_max6675_ms = 0;
millis_t ms = millis();
if (PENDING(ms, next_max6675_ms)) return (int)max6675_temp;
next_max6675_ms = ms + MAX6675_HEAT_INTERVAL;
CBI(
#ifdef PRR
PRR
#elif defined(PRR0)
PRR0
#endif
, PRSPI);
SPCR = _BV(MSTR) | _BV(SPE) | MAX6675_SPEED_BITS;
WRITE(MAX6675_SS, 0); // enable TT_MAX6675
// ensure 100ns delay - a bit extra is fine
asm("nop");//50ns on 20Mhz, 62.5ns on 16Mhz
asm("nop");//50ns on 20Mhz, 62.5ns on 16Mhz
// Read a big-endian temperature value
max6675_temp = 0;
for (uint8_t i = sizeof(max6675_temp); i--;) {
SPDR = 0;
for (;!TEST(SPSR, SPIF););
max6675_temp |= SPDR;
if (i > 0) max6675_temp <<= 8; // shift left if not the last byte
}
WRITE(MAX6675_SS, 1); // disable TT_MAX6675
if (max6675_temp & MAX6675_ERROR_MASK)
max6675_temp = 4000; // thermocouple open
else
max6675_temp >>= MAX6675_DISCARD_BITS;
return (int)max6675_temp;
}
#endif //HEATER_0_USES_MAX6675
/**
* Stages in the ISR loop
*/
enum TempState {
PrepareTemp_0,
MeasureTemp_0,
PrepareTemp_BED,
MeasureTemp_BED,
PrepareTemp_1,
MeasureTemp_1,
PrepareTemp_2,
MeasureTemp_2,
PrepareTemp_3,
MeasureTemp_3,
Prepare_FILWIDTH,
Measure_FILWIDTH,
StartupDelay // Startup, delay initial temp reading a tiny bit so the hardware can settle
};
/**
* Get raw temperatures
*/
void Temperature::set_current_temp_raw() {
#if HAS_TEMP_0 && DISABLED(HEATER_0_USES_MAX6675)
current_temperature_raw[0] = raw_temp_value[0];
#endif
#if HAS_TEMP_1
#if ENABLED(TEMP_SENSOR_1_AS_REDUNDANT)
redundant_temperature_raw = raw_temp_value[1];
#else
current_temperature_raw[1] = raw_temp_value[1];
#endif
#if HAS_TEMP_2
current_temperature_raw[2] = raw_temp_value[2];
#if HAS_TEMP_3
current_temperature_raw[3] = raw_temp_value[3];
#endif
#endif
#endif
current_temperature_bed_raw = raw_temp_bed_value;
temp_meas_ready = true;
}
/**
* Timer 0 is shared with millies
* - Manage PWM to all the heaters and fan
* - Update the raw temperature values
* - Check new temperature values for MIN/MAX errors
* - Step the babysteps value for each axis towards 0
*/
ISR(TIMER0_COMPB_vect) { Temperature::isr(); }
void Temperature::isr() {
static unsigned char temp_count = 0;
static TempState temp_state = StartupDelay;
static unsigned char pwm_count = _BV(SOFT_PWM_SCALE);
// Static members for each heater
#if ENABLED(SLOW_PWM_HEATERS)
static unsigned char slow_pwm_count = 0;
#define ISR_STATICS(n) \
static unsigned char soft_pwm_ ## n; \
static unsigned char state_heater_ ## n = 0; \
static unsigned char state_timer_heater_ ## n = 0
#else
#define ISR_STATICS(n) static unsigned char soft_pwm_ ## n
#endif
// Statics per heater
ISR_STATICS(0);
#if (HOTENDS > 1) || ENABLED(HEATERS_PARALLEL)
ISR_STATICS(1);
#if HOTENDS > 2
ISR_STATICS(2);
#if HOTENDS > 3
ISR_STATICS(3);
#endif
#endif
#endif
#if HAS_HEATER_BED
ISR_STATICS(BED);
#endif
#if ENABLED(FILAMENT_WIDTH_SENSOR)
static unsigned long raw_filwidth_value = 0;
#endif
#if DISABLED(SLOW_PWM_HEATERS)
/**
* standard PWM modulation
*/
if (pwm_count == 0) {
soft_pwm_0 = soft_pwm[0];
if (soft_pwm_0 > 0) {
WRITE_HEATER_0(1);
}
else WRITE_HEATER_0P(0); // If HEATERS_PARALLEL should apply, change to WRITE_HEATER_0
#if HOTENDS > 1
soft_pwm_1 = soft_pwm[1];
WRITE_HEATER_1(soft_pwm_1 > 0 ? 1 : 0);
#if HOTENDS > 2
soft_pwm_2 = soft_pwm[2];
WRITE_HEATER_2(soft_pwm_2 > 0 ? 1 : 0);
#if HOTENDS > 3
soft_pwm_3 = soft_pwm[3];
WRITE_HEATER_3(soft_pwm_3 > 0 ? 1 : 0);
#endif
#endif
#endif
#if HAS_HEATER_BED
soft_pwm_BED = soft_pwm_bed;
WRITE_HEATER_BED(soft_pwm_BED > 0 ? 1 : 0);
#endif
#if ENABLED(FAN_SOFT_PWM)
#if HAS_FAN0
soft_pwm_fan[0] = fanSpeedSoftPwm[0] / 2;
WRITE_FAN(soft_pwm_fan[0] > 0 ? 1 : 0);
#endif
#if HAS_FAN1
soft_pwm_fan[1] = fanSpeedSoftPwm[1] / 2;
WRITE_FAN1(soft_pwm_fan[1] > 0 ? 1 : 0);
#endif
#if HAS_FAN2
soft_pwm_fan[2] = fanSpeedSoftPwm[2] / 2;
WRITE_FAN2(soft_pwm_fan[2] > 0 ? 1 : 0);
#endif
#endif
}
if (soft_pwm_0 < pwm_count) WRITE_HEATER_0(0);
#if HOTENDS > 1
if (soft_pwm_1 < pwm_count) WRITE_HEATER_1(0);
#if HOTENDS > 2
if (soft_pwm_2 < pwm_count) WRITE_HEATER_2(0);
#if HOTENDS > 3
if (soft_pwm_3 < pwm_count) WRITE_HEATER_3(0);
#endif
#endif
#endif
#if HAS_HEATER_BED
if (soft_pwm_BED < pwm_count) WRITE_HEATER_BED(0);
#endif
#if ENABLED(FAN_SOFT_PWM)
#if HAS_FAN0
if (soft_pwm_fan[0] < pwm_count) WRITE_FAN(0);
#endif
#if HAS_FAN1
if (soft_pwm_fan[1] < pwm_count) WRITE_FAN1(0);
#endif
#if HAS_FAN2
if (soft_pwm_fan[2] < pwm_count) WRITE_FAN2(0);
#endif
#endif
pwm_count += _BV(SOFT_PWM_SCALE);
pwm_count &= 0x7f;
#else // SLOW_PWM_HEATERS
/**
* SLOW PWM HEATERS
*
* for heaters drived by relay
*/
#ifndef MIN_STATE_TIME
#define MIN_STATE_TIME 16 // MIN_STATE_TIME * 65.5 = time in milliseconds
#endif
// Macros for Slow PWM timer logic - HEATERS_PARALLEL applies
#define _SLOW_PWM_ROUTINE(NR, src) \
soft_pwm_ ## NR = src; \
if (soft_pwm_ ## NR > 0) { \
if (state_timer_heater_ ## NR == 0) { \
if (state_heater_ ## NR == 0) state_timer_heater_ ## NR = MIN_STATE_TIME; \
state_heater_ ## NR = 1; \
WRITE_HEATER_ ## NR(1); \
} \
} \
else { \
if (state_timer_heater_ ## NR == 0) { \
if (state_heater_ ## NR == 1) state_timer_heater_ ## NR = MIN_STATE_TIME; \
state_heater_ ## NR = 0; \
WRITE_HEATER_ ## NR(0); \
} \
}
#define SLOW_PWM_ROUTINE(n) _SLOW_PWM_ROUTINE(n, soft_pwm[n])
#define PWM_OFF_ROUTINE(NR) \
if (soft_pwm_ ## NR < slow_pwm_count) { \
if (state_timer_heater_ ## NR == 0) { \
if (state_heater_ ## NR == 1) state_timer_heater_ ## NR = MIN_STATE_TIME; \
state_heater_ ## NR = 0; \
WRITE_HEATER_ ## NR (0); \
} \
}
if (slow_pwm_count == 0) {
SLOW_PWM_ROUTINE(0); // EXTRUDER 0
#if HOTENDS > 1
SLOW_PWM_ROUTINE(1); // EXTRUDER 1
#if HOTENDS > 2
SLOW_PWM_ROUTINE(2); // EXTRUDER 2
#if HOTENDS > 3
SLOW_PWM_ROUTINE(3); // EXTRUDER 3
#endif
#endif
#endif
#if HAS_HEATER_BED
_SLOW_PWM_ROUTINE(BED, soft_pwm_bed); // BED
#endif
} // slow_pwm_count == 0
PWM_OFF_ROUTINE(0); // EXTRUDER 0
#if HOTENDS > 1
PWM_OFF_ROUTINE(1); // EXTRUDER 1
#if HOTENDS > 2
PWM_OFF_ROUTINE(2); // EXTRUDER 2
#if HOTENDS > 3
PWM_OFF_ROUTINE(3); // EXTRUDER 3
#endif
#endif
#endif
#if HAS_HEATER_BED
PWM_OFF_ROUTINE(BED); // BED
#endif
#if ENABLED(FAN_SOFT_PWM)
if (pwm_count == 0) {
#if HAS_FAN0
soft_pwm_fan[0] = fanSpeedSoftPwm[0] / 2;
WRITE_FAN(soft_pwm_fan[0] > 0 ? 1 : 0);
#endif
#if HAS_FAN1
soft_pwm_fan[1] = fanSpeedSoftPwm[1] / 2;
WRITE_FAN1(soft_pwm_fan[1] > 0 ? 1 : 0);
#endif
#if HAS_FAN2
soft_pwm_fan[2] = fanSpeedSoftPwm[2] / 2;
WRITE_FAN2(soft_pwm_fan[2] > 0 ? 1 : 0);
#endif
}
#if HAS_FAN0
if (soft_pwm_fan[0] < pwm_count) WRITE_FAN(0);
#endif
#if HAS_FAN1
if (soft_pwm_fan[1] < pwm_count) WRITE_FAN1(0);
#endif
#if HAS_FAN2
if (soft_pwm_fan[2] < pwm_count) WRITE_FAN2(0);
#endif
#endif //FAN_SOFT_PWM
pwm_count += _BV(SOFT_PWM_SCALE);
pwm_count &= 0x7f;
// increment slow_pwm_count only every 64 pwm_count circa 65.5ms
if ((pwm_count % 64) == 0) {
slow_pwm_count++;
slow_pwm_count &= 0x7f;
// EXTRUDER 0
if (state_timer_heater_0 > 0) state_timer_heater_0--;
#if HOTENDS > 1 // EXTRUDER 1
if (state_timer_heater_1 > 0) state_timer_heater_1--;
#if HOTENDS > 2 // EXTRUDER 2
if (state_timer_heater_2 > 0) state_timer_heater_2--;
#if HOTENDS > 3 // EXTRUDER 3
if (state_timer_heater_3 > 0) state_timer_heater_3--;
#endif
#endif
#endif
#if HAS_HEATER_BED
if (state_timer_heater_BED > 0) state_timer_heater_BED--;
#endif
} // (pwm_count % 64) == 0
#endif // SLOW_PWM_HEATERS
#define SET_ADMUX_ADCSRA(pin) ADMUX = _BV(REFS0) | (pin & 0x07); SBI(ADCSRA, ADSC)
#ifdef MUX5
#define START_ADC(pin) if (pin > 7) ADCSRB = _BV(MUX5); else ADCSRB = 0; SET_ADMUX_ADCSRA(pin)
#else
#define START_ADC(pin) ADCSRB = 0; SET_ADMUX_ADCSRA(pin)
#endif
// Prepare or measure a sensor, each one every 12th frame
switch (temp_state) {
case PrepareTemp_0:
#if HAS_TEMP_0
START_ADC(TEMP_0_PIN);
#endif
lcd_buttons_update();
temp_state = MeasureTemp_0;
break;
case MeasureTemp_0:
#if HAS_TEMP_0
raw_temp_value[0] += ADC;
#endif
temp_state = PrepareTemp_BED;
break;
case PrepareTemp_BED:
#if HAS_TEMP_BED
START_ADC(TEMP_BED_PIN);
#endif
lcd_buttons_update();
temp_state = MeasureTemp_BED;
break;
case MeasureTemp_BED:
#if HAS_TEMP_BED
raw_temp_bed_value += ADC;
#endif
temp_state = PrepareTemp_1;
break;
case PrepareTemp_1:
#if HAS_TEMP_1
START_ADC(TEMP_1_PIN);
#endif
lcd_buttons_update();
temp_state = MeasureTemp_1;
break;
case MeasureTemp_1:
#if HAS_TEMP_1
raw_temp_value[1] += ADC;
#endif
temp_state = PrepareTemp_2;
break;
case PrepareTemp_2:
#if HAS_TEMP_2
START_ADC(TEMP_2_PIN);
#endif
lcd_buttons_update();
temp_state = MeasureTemp_2;
break;
case MeasureTemp_2:
#if HAS_TEMP_2
raw_temp_value[2] += ADC;
#endif
temp_state = PrepareTemp_3;
break;
case PrepareTemp_3:
#if HAS_TEMP_3
START_ADC(TEMP_3_PIN);
#endif
lcd_buttons_update();
temp_state = MeasureTemp_3;
break;
case MeasureTemp_3:
#if HAS_TEMP_3
raw_temp_value[3] += ADC;
#endif
temp_state = Prepare_FILWIDTH;
break;
case Prepare_FILWIDTH:
#if ENABLED(FILAMENT_WIDTH_SENSOR)
START_ADC(FILWIDTH_PIN);
#endif
lcd_buttons_update();
temp_state = Measure_FILWIDTH;
break;
case Measure_FILWIDTH:
#if ENABLED(FILAMENT_WIDTH_SENSOR)
// raw_filwidth_value += ADC; //remove to use an IIR filter approach
if (ADC > 102) { //check that ADC is reading a voltage > 0.5 volts, otherwise don't take in the data.
raw_filwidth_value -= (raw_filwidth_value >> 7); //multiply raw_filwidth_value by 127/128
raw_filwidth_value += ((unsigned long)ADC << 7); //add new ADC reading
}
#endif
temp_state = PrepareTemp_0;
temp_count++;
break;
case StartupDelay:
temp_state = PrepareTemp_0;
break;
// default:
// SERIAL_ERROR_START;
// SERIAL_ERRORLNPGM("Temp measurement error!");
// break;
} // switch(temp_state)
if (temp_count >= OVERSAMPLENR) { // 10 * 16 * 1/(16000000/64/256) = 164ms.
// Update the raw values if they've been read. Else we could be updating them during reading.
if (!temp_meas_ready) set_current_temp_raw();
// Filament Sensor - can be read any time since IIR filtering is used
#if ENABLED(FILAMENT_WIDTH_SENSOR)
current_raw_filwidth = raw_filwidth_value >> 10; // Divide to get to 0-16384 range since we used 1/128 IIR filter approach
#endif
temp_count = 0;
for (int i = 0; i < 4; i++) raw_temp_value[i] = 0;
raw_temp_bed_value = 0;
#if HAS_TEMP_0 && DISABLED(HEATER_0_USES_MAX6675)
#if HEATER_0_RAW_LO_TEMP > HEATER_0_RAW_HI_TEMP
#define GE0 <=
#else
#define GE0 >=
#endif
if (current_temperature_raw[0] GE0 maxttemp_raw[0]) max_temp_error(0);
if (minttemp_raw[0] GE0 current_temperature_raw[0]) min_temp_error(0);
#endif
#if HAS_TEMP_1 && HOTENDS > 1
#if HEATER_1_RAW_LO_TEMP > HEATER_1_RAW_HI_TEMP
#define GE1 <=
#else
#define GE1 >=
#endif
if (current_temperature_raw[1] GE1 maxttemp_raw[1]) max_temp_error(1);
if (minttemp_raw[1] GE1 current_temperature_raw[1]) min_temp_error(1);
#endif // TEMP_SENSOR_1
#if HAS_TEMP_2 && HOTENDS > 2
#if HEATER_2_RAW_LO_TEMP > HEATER_2_RAW_HI_TEMP
#define GE2 <=
#else
#define GE2 >=
#endif
if (current_temperature_raw[2] GE2 maxttemp_raw[2]) max_temp_error(2);
if (minttemp_raw[2] GE2 current_temperature_raw[2]) min_temp_error(2);
#endif // TEMP_SENSOR_2
#if HAS_TEMP_3 && HOTENDS > 3
#if HEATER_3_RAW_LO_TEMP > HEATER_3_RAW_HI_TEMP
#define GE3 <=
#else
#define GE3 >=
#endif
if (current_temperature_raw[3] GE3 maxttemp_raw[3]) max_temp_error(3);
if (minttemp_raw[3] GE3 current_temperature_raw[3]) min_temp_error(3);
#endif // TEMP_SENSOR_3
#if HAS_TEMP_BED
#if HEATER_BED_RAW_LO_TEMP > HEATER_BED_RAW_HI_TEMP
#define GEBED <=
#else
#define GEBED >=
#endif
if (current_temperature_bed_raw GEBED bed_maxttemp_raw) _temp_error(-1, PSTR(MSG_T_MAXTEMP), PSTR(MSG_ERR_MAXTEMP_BED));
if (bed_minttemp_raw GEBED current_temperature_bed_raw) _temp_error(-1, PSTR(MSG_T_MINTEMP), PSTR(MSG_ERR_MINTEMP_BED));
#endif
} // temp_count >= OVERSAMPLENR
#if ENABLED(BABYSTEPPING)
for (uint8_t axis = X_AXIS; axis <= Z_AXIS; axis++) {
int curTodo = babystepsTodo[axis]; //get rid of volatile for performance
if (curTodo > 0) {
stepper.babystep(axis,/*fwd*/true);
babystepsTodo[axis]--; //fewer to do next time
}
else if (curTodo < 0) {
stepper.babystep(axis,/*fwd*/false);
babystepsTodo[axis]++; //fewer to do next time
}
}
#endif //BABYSTEPPING
}
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