2 This file is part of Smoothie (http://smoothieware.org/). The motion control part is heavily based on Grbl (https://github.com/simen/grbl).
3 Smoothie 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.
4 Smoothie 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.
5 You should have received a copy of the GNU General Public License along with Smoothie. If not, see <http://www.gnu.org/licenses/>.
8 // TODO : THIS FILE IS LAME, MUST BE MADE MUCH BETTER
10 #include "libs/Module.h"
11 #include "libs/Kernel.h"
13 #include "TemperatureControl.h"
14 #include "TemperatureControlPool.h"
16 #include "modules/robot/Conveyor.h"
17 #include "PublicDataRequest.h"
19 #include "PublicData.h"
20 #include "ToolManagerPublicAccess.h"
21 #include "StreamOutputPool.h"
23 #include "checksumm.h"
25 #include "SlowTicker.h"
27 #include "ConfigValue.h"
28 #include "TemperatureControl.h"
29 #include "PID_Autotuner.h"
31 // Temp sensor implementations:
32 #include "Thermistor.h"
35 #include "MRI_Hooks.h"
39 #define sensor_checksum CHECKSUM("sensor")
41 #define readings_per_second_checksum CHECKSUM("readings_per_second")
42 #define max_pwm_checksum CHECKSUM("max_pwm")
43 #define pwm_frequency_checksum CHECKSUM("pwm_frequency")
44 #define bang_bang_checksum CHECKSUM("bang_bang")
45 #define hysteresis_checksum CHECKSUM("hysteresis")
46 #define heater_pin_checksum CHECKSUM("heater_pin")
48 #define get_m_code_checksum CHECKSUM("get_m_code")
49 #define set_m_code_checksum CHECKSUM("set_m_code")
50 #define set_and_wait_m_code_checksum CHECKSUM("set_and_wait_m_code")
52 #define designator_checksum CHECKSUM("designator")
54 #define p_factor_checksum CHECKSUM("p_factor")
55 #define i_factor_checksum CHECKSUM("i_factor")
56 #define d_factor_checksum CHECKSUM("d_factor")
58 #define i_max_checksum CHECKSUM("i_max")
60 #define preset1_checksum CHECKSUM("preset1")
61 #define preset2_checksum CHECKSUM("preset2")
63 TemperatureControl::TemperatureControl(uint16_t name
, int index
)
68 min_temp_violated
= false;
72 TemperatureControl::~TemperatureControl()
77 void TemperatureControl::on_module_loaded()
80 // We start not desiring any temp
81 this->target_temperature
= UNDEFINED
;
84 this->on_config_reload(this);
86 // Register for events
87 register_for_event(ON_CONFIG_RELOAD
);
88 this->register_for_event(ON_GCODE_EXECUTE
);
89 this->register_for_event(ON_GCODE_RECEIVED
);
90 this->register_for_event(ON_MAIN_LOOP
);
91 this->register_for_event(ON_SECOND_TICK
);
92 this->register_for_event(ON_GET_PUBLIC_DATA
);
93 this->register_for_event(ON_SET_PUBLIC_DATA
);
96 void TemperatureControl::on_main_loop(void *argument
)
98 if (this->min_temp_violated
) {
99 THEKERNEL
->streams
->printf("Error: MINTEMP triggered. Check your temperature sensors!\n");
100 this->min_temp_violated
= false;
104 // Get configuration from the config file
105 void TemperatureControl::on_config_reload(void *argument
)
109 this->set_m_code
= THEKERNEL
->config
->value(temperature_control_checksum
, this->name_checksum
, set_m_code_checksum
)->by_default(104)->as_number();
110 this->set_and_wait_m_code
= THEKERNEL
->config
->value(temperature_control_checksum
, this->name_checksum
, set_and_wait_m_code_checksum
)->by_default(109)->as_number();
111 this->get_m_code
= THEKERNEL
->config
->value(temperature_control_checksum
, this->name_checksum
, get_m_code_checksum
)->by_default(105)->as_number();
112 this->readings_per_second
= THEKERNEL
->config
->value(temperature_control_checksum
, this->name_checksum
, readings_per_second_checksum
)->by_default(20)->as_number();
114 this->designator
= THEKERNEL
->config
->value(temperature_control_checksum
, this->name_checksum
, designator_checksum
)->by_default(string("T"))->as_string();
116 // For backward compatibility, default to a thermistor sensor.
117 std::string sensor_type
= THEKERNEL
->config
->value(temperature_control_checksum
, this->name_checksum
, sensor_checksum
)->by_default("thermistor")->as_string();
119 // Instantiate correct sensor (TBD: TempSensor factory?)
121 sensor
= nullptr; // In case we fail to create a new sensor.
122 if(sensor_type
.compare("thermistor") == 0) {
123 sensor
= new Thermistor();
124 } else if(sensor_type
.compare("max31855") == 0) {
125 sensor
= new Max31855();
127 sensor
= new TempSensor(); // A dummy implementation
129 sensor
->UpdateConfig(temperature_control_checksum
, this->name_checksum
);
131 this->preset1
= THEKERNEL
->config
->value(temperature_control_checksum
, this->name_checksum
, preset1_checksum
)->by_default(0)->as_number();
132 this->preset2
= THEKERNEL
->config
->value(temperature_control_checksum
, this->name_checksum
, preset2_checksum
)->by_default(0)->as_number();
135 // sigma-delta output modulation
139 this->heater_pin
.from_string( THEKERNEL
->config
->value(temperature_control_checksum
, this->name_checksum
, heater_pin_checksum
)->required()->as_string())->as_output();
140 this->heater_pin
.max_pwm( THEKERNEL
->config
->value(temperature_control_checksum
, this->name_checksum
, max_pwm_checksum
)->by_default(255)->as_number() );
142 this->heater_pin
.set(0);
144 // used to enable bang bang control of heater
145 this->use_bangbang
= THEKERNEL
->config
->value(temperature_control_checksum
, this->name_checksum
, bang_bang_checksum
)->by_default(false)->as_bool();
146 this->hysteresis
= THEKERNEL
->config
->value(temperature_control_checksum
, this->name_checksum
, hysteresis_checksum
)->by_default(2)->as_number();
148 set_low_on_debug(heater_pin
.port_number
, heater_pin
.pin
);
150 // activate SD-DAC timer
151 THEKERNEL
->slow_ticker
->attach( THEKERNEL
->config
->value(temperature_control_checksum
, this->name_checksum
, pwm_frequency_checksum
)->by_default(2000)->as_number() , &heater_pin
, &Pwm::on_tick
);
154 THEKERNEL
->slow_ticker
->attach( this->readings_per_second
, this, &TemperatureControl::thermistor_read_tick
);
155 this->PIDdt
= 1.0 / this->readings_per_second
;
158 setPIDp( THEKERNEL
->config
->value(temperature_control_checksum
, this->name_checksum
, p_factor_checksum
)->by_default(10 )->as_number() );
159 setPIDi( THEKERNEL
->config
->value(temperature_control_checksum
, this->name_checksum
, i_factor_checksum
)->by_default(0.3f
)->as_number() );
160 setPIDd( THEKERNEL
->config
->value(temperature_control_checksum
, this->name_checksum
, d_factor_checksum
)->by_default(200)->as_number() );
161 // set to the same as max_pwm by default
162 this->i_max
= THEKERNEL
->config
->value(temperature_control_checksum
, this->name_checksum
, i_max_checksum
)->by_default(this->heater_pin
.max_pwm())->as_number();
164 this->lastInput
= -1.0;
165 this->last_reading
= 0.0;
168 void TemperatureControl::on_gcode_received(void *argument
)
170 Gcode
*gcode
= static_cast<Gcode
*>(argument
);
173 if( gcode
->m
== this->get_m_code
) {
174 char buf
[32]; // should be big enough for any status
175 int n
= snprintf(buf
, sizeof(buf
), "%s:%3.1f /%3.1f @%d ", this->designator
.c_str(), this->get_temperature(), ((target_temperature
== UNDEFINED
) ? 0.0 : target_temperature
), this->o
);
176 gcode
->txt_after_ok
.append(buf
, n
);
177 gcode
->mark_as_taken();
179 } else if (gcode
->m
== 301) {
180 gcode
->mark_as_taken();
181 if (gcode
->has_letter('S') && (gcode
->get_value('S') == this->pool_index
)) {
182 if (gcode
->has_letter('P'))
183 setPIDp( gcode
->get_value('P') );
184 if (gcode
->has_letter('I'))
185 setPIDi( gcode
->get_value('I') );
186 if (gcode
->has_letter('D'))
187 setPIDd( gcode
->get_value('D') );
188 if (gcode
->has_letter('X'))
189 this->i_max
= gcode
->get_value('X');
191 //gcode->stream->printf("%s(S%d): Pf:%g If:%g Df:%g X(I_max):%g Pv:%g Iv:%g Dv:%g O:%d\n", this->designator.c_str(), this->pool_index, this->p_factor, this->i_factor/this->PIDdt, this->d_factor*this->PIDdt, this->i_max, this->p, this->i, this->d, o);
192 gcode
->stream
->printf("%s(S%d): Pf:%g If:%g Df:%g X(I_max):%g O:%d\n", this->designator
.c_str(), this->pool_index
, this->p_factor
, this->i_factor
/ this->PIDdt
, this->d_factor
* this->PIDdt
, this->i_max
, o
);
194 } else if (gcode
->m
== 500 || gcode
->m
== 503) { // M500 saves some volatile settings to config override file, M503 just prints the settings
195 gcode
->stream
->printf(";PID settings:\nM301 S%d P%1.4f I%1.4f D%1.4f\n", this->pool_index
, this->p_factor
, this->i_factor
/ this->PIDdt
, this->d_factor
* this->PIDdt
);
196 gcode
->mark_as_taken();
198 } else if( ( gcode
->m
== this->set_m_code
|| gcode
->m
== this->set_and_wait_m_code
) && gcode
->has_letter('S')) {
199 // this only gets handled if it is not controlle dby the tool manager or is active in the toolmanager
202 // this is safe as old configs as well as single extruder configs the toolmanager will not be running so will return false
203 // this will also ignore anything that the tool manager is not controlling and return false, otherwise it returns the active tool
205 bool ok
= PublicData::get_value( tool_manager_checksum
, is_active_tool_checksum
, this->name_checksum
, &returned_data
);
207 uint16_t active_tool_name
= *static_cast<uint16_t *>(returned_data
);
208 this->active
= (active_tool_name
== this->name_checksum
);
212 // Attach gcodes to the last block for on_gcode_execute
213 THEKERNEL
->conveyor
->append_gcode(gcode
);
215 // push an empty block if we have to wait, so the Planner can get things right, and we can prevent subsequent non-move gcodes from executing
216 if (gcode
->m
== this->set_and_wait_m_code
) {
217 // ensure that no subsequent gcodes get executed with our M109 or similar
218 THEKERNEL
->conveyor
->queue_head_block();
225 void TemperatureControl::on_gcode_execute(void *argument
)
227 Gcode
*gcode
= static_cast<Gcode
*>(argument
);
229 if (((gcode
->m
== this->set_m_code
) || (gcode
->m
== this->set_and_wait_m_code
))
230 && gcode
->has_letter('S') && this->active
) {
231 float v
= gcode
->get_value('S');
234 this->target_temperature
= UNDEFINED
;
235 this->heater_pin
.set((this->o
= 0));
237 this->set_desired_temperature(v
);
239 if( gcode
->m
== this->set_and_wait_m_code
) {
240 THEKERNEL
->pauser
->take();
241 this->waiting
= true;
248 void TemperatureControl::on_get_public_data(void *argument
)
250 PublicDataRequest
*pdr
= static_cast<PublicDataRequest
*>(argument
);
252 if(!pdr
->starts_with(temperature_control_checksum
)) return;
254 if(pdr
->second_element_is(pool_index_checksum
)) {
255 // asking for our instance pointer if we have this pool_index
256 if(pdr
->third_element_is(this->pool_index
)) {
257 static void *return_data
;
259 pdr
->set_data_ptr(&return_data
);
264 }else if(!pdr
->second_element_is(this->name_checksum
)) return;
266 // ok this is targeted at us, so send back the requested data
267 if(pdr
->third_element_is(current_temperature_checksum
)) {
268 this->public_data_return
.current_temperature
= this->get_temperature();
269 this->public_data_return
.target_temperature
= (target_temperature
== UNDEFINED
) ? 0 : this->target_temperature
;
270 this->public_data_return
.pwm
= this->o
;
271 this->public_data_return
.designator
= this->designator
;
272 pdr
->set_data_ptr(&this->public_data_return
);
278 void TemperatureControl::on_set_public_data(void *argument
)
280 PublicDataRequest
*pdr
= static_cast<PublicDataRequest
*>(argument
);
282 if(!pdr
->starts_with(temperature_control_checksum
)) return;
284 if(!pdr
->second_element_is(this->name_checksum
)) return;
286 // ok this is targeted at us, so set the temp
287 float t
= *static_cast<float *>(pdr
->get_data_ptr());
288 this->set_desired_temperature(t
);
292 void TemperatureControl::set_desired_temperature(float desired_temperature
)
294 if (desired_temperature
== 1.0)
295 desired_temperature
= preset1
;
296 else if (desired_temperature
== 2.0)
297 desired_temperature
= preset2
;
299 target_temperature
= desired_temperature
;
300 if (desired_temperature
== 0.0)
301 heater_pin
.set((this->o
= 0));
304 float TemperatureControl::get_temperature()
309 uint32_t TemperatureControl::thermistor_read_tick(uint32_t dummy
)
311 float temperature
= sensor
->get_temperature();
313 if (target_temperature
> 0) {
314 if (isinf(temperature
)) {
315 this->min_temp_violated
= true;
316 target_temperature
= UNDEFINED
;
317 heater_pin
.set((this->o
= 0));
319 pid_process(temperature
);
320 if ((temperature
> target_temperature
) && waiting
) {
321 THEKERNEL
->pauser
->release();
326 heater_pin
.set((this->o
= 0));
328 last_reading
= temperature
;
333 * Based on https://github.com/br3ttb/Arduino-PID-Library
335 void TemperatureControl::pid_process(float temperature
)
338 // bang bang is very simple, if temp is < target - hysteresis turn on full else if temp is > target + hysteresis turn heater off
340 if(temperature
> (target_temperature
+ hysteresis
) && this->o
> 0) {
341 heater_pin
.set(false);
342 this->o
= 0; // for display purposes only
344 } else if(temperature
< (target_temperature
- hysteresis
) && this->o
<= 0) {
345 if(heater_pin
.max_pwm() >= 255) {
347 this->heater_pin
.set(true);
348 this->o
= 255; // for display purposes only
350 // only to whatever max pwm is configured
351 this->heater_pin
.pwm(heater_pin
.max_pwm());
352 this->o
= heater_pin
.max_pwm(); // for display purposes only
358 // regular PID control
359 float error
= target_temperature
- temperature
;
360 this->iTerm
+= (error
* this->i_factor
);
361 if (this->iTerm
> this->i_max
) this->iTerm
= this->i_max
;
362 else if (this->iTerm
< 0.0) this->iTerm
= 0.0;
364 if(this->lastInput
< 0.0) this->lastInput
= temperature
; // set first time
365 float d
= (temperature
- this->lastInput
);
367 // calculate the PID output
368 // TODO does this need to be scaled by max_pwm/256? I think not as p_factor already does that
369 this->o
= (this->p_factor
* error
) + this->iTerm
- (this->d_factor
* d
);
371 if (this->o
>= heater_pin
.max_pwm())
372 this->o
= heater_pin
.max_pwm();
373 else if (this->o
< 0)
376 this->heater_pin
.pwm(this->o
);
377 this->lastInput
= temperature
;
380 void TemperatureControl::on_second_tick(void *argument
)
383 THEKERNEL
->streams
->printf("%s:%3.1f /%3.1f @%d\n", designator
.c_str(), get_temperature(), ((target_temperature
== UNDEFINED
) ? 0.0 : target_temperature
), o
);
386 void TemperatureControl::setPIDp(float p
)
391 void TemperatureControl::setPIDi(float i
)
393 this->i_factor
= i
* this->PIDdt
;
396 void TemperatureControl::setPIDd(float d
)
398 this->d_factor
= d
/ this->PIDdt
;