Update temperature types

Marlin/src/core/types.h

@@ -77,6 +77,7 @@ typedef float feedRate_t;
 // For more resolition (e.g., for a chocolate printer) this may later be changed to Celsius x 100
 //
 typedef int16_t celsius_t;
+typedef float celsius_float_t;
 
 //
 // On AVR pointers are only 2 bytes so use 'const float &' for 'const float'
@@ -87,17 +88,18 @@ typedef int16_t celsius_t;
   typedef const float const_float_t;
 #endif
 typedef const_float_t const_feedRate_t;
+typedef const_float_t const_celsius_float_t;
 
 // Conversion macros
-#define MMM_TO_MMS(MM_M) feedRate_t(float(MM_M) / 60.0f)
+#define MMM_TO_MMS(MM_M) feedRate_t(static_cast<float>(MM_M) / 60.0f)
-#define MMS_TO_MMM(MM_S) (float(MM_S) * 60.0f)
+#define MMS_TO_MMM(MM_S) (static_cast<float>(MM_S) * 60.0f)
 
 //
 // Coordinates structures for XY, XYZ, XYZE...
 //
 
 // Helpers
-#define _RECIP(N) ((N) ? 1.0f / float(N) : 0.0f)
+#define _RECIP(N) ((N) ? 1.0f / static_cast<float>(N) : 0.0f)
 #define _ABS(N) ((N) < 0 ? -(N) : (N))
 #define _LS(N)  (N = (T)(uint32_t(N) << v))
 #define _RS(N)  (N = (T)(uint32_t(N) >> v))
@@ -214,8 +216,8 @@ struct XYval {
   FI XYval<int32_t>   asLong()                    const { return { int32_t(x), int32_t(y) }; }
   FI XYval<int32_t>   ROUNDL()                          { return { int32_t(LROUND(x)), int32_t(LROUND(y)) }; }
   FI XYval<int32_t>   ROUNDL()                    const { return { int32_t(LROUND(x)), int32_t(LROUND(y)) }; }
-  FI XYval<float>    asFloat()                          { return {   float(x),   float(y) }; }
+  FI XYval<float>    asFloat()                          { return { static_cast<float>(x), static_cast<float>(y) }; }
-  FI XYval<float>    asFloat()                    const { return {   float(x),   float(y) }; }
+  FI XYval<float>    asFloat()                    const { return { static_cast<float>(x), static_cast<float>(y) }; }
   FI XYval<float> reciprocal()                    const { return {  _RECIP(x),  _RECIP(y) }; }
   FI XYval<float>  asLogical()                    const { XYval<float> o = asFloat(); toLogical(o); return o; }
   FI XYval<float>   asNative()                    const { XYval<float> o = asFloat(); toNative(o);  return o; }
@@ -325,8 +327,8 @@ struct XYZval {
   FI XYZval<int32_t>  asLong()                   const { return { int32_t(x), int32_t(y), int32_t(z) }; }
   FI XYZval<int32_t>  ROUNDL()                         { return { int32_t(LROUND(x)), int32_t(LROUND(y)), int32_t(LROUND(z)) }; }
   FI XYZval<int32_t>  ROUNDL()                   const { return { int32_t(LROUND(x)), int32_t(LROUND(y)), int32_t(LROUND(z)) }; }
-  FI XYZval<float>   asFloat()                         { return {   float(x),   float(y),   float(z) }; }
+  FI XYZval<float>   asFloat()                         { return { static_cast<float>(x), static_cast<float>(y), static_cast<float>(z) }; }
-  FI XYZval<float>   asFloat()                   const { return {   float(x),   float(y),   float(z) }; }
+  FI XYZval<float>   asFloat()                   const { return { static_cast<float>(x), static_cast<float>(y), static_cast<float>(z) }; }
   FI XYZval<float> reciprocal()                  const { return {  _RECIP(x),  _RECIP(y),  _RECIP(z) }; }
   FI XYZval<float> asLogical()                   const { XYZval<float> o = asFloat(); toLogical(o); return o; }
   FI XYZval<float>  asNative()                   const { XYZval<float> o = asFloat(); toNative(o);  return o; }
@@ -436,8 +438,8 @@ struct XYZEval {
   FI XYZEval<int32_t>  asLong()                         const { return { int32_t(x), int32_t(y), int32_t(z), int32_t(e) }; }
   FI XYZEval<int32_t>  ROUNDL()                               { return { int32_t(LROUND(x)), int32_t(LROUND(y)), int32_t(LROUND(z)), int32_t(LROUND(e)) }; }
   FI XYZEval<int32_t>  ROUNDL()                         const { return { int32_t(LROUND(x)), int32_t(LROUND(y)), int32_t(LROUND(z)), int32_t(LROUND(e)) }; }
-  FI XYZEval<float>   asFloat()                               { return {   float(x),   float(y),   float(z),   float(e) }; }
+  FI XYZEval<float>   asFloat()                               { return { static_cast<float>(x), static_cast<float>(y), static_cast<float>(z), static_cast<float>(e) }; }
-  FI XYZEval<float>   asFloat()                         const { return {   float(x),   float(y),   float(z),   float(e) }; }
+  FI XYZEval<float>   asFloat()                         const { return { static_cast<float>(x), static_cast<float>(y), static_cast<float>(z), static_cast<float>(e) }; }
   FI XYZEval<float> reciprocal()                        const { return {  _RECIP(x),  _RECIP(y),  _RECIP(z),  _RECIP(e) }; }
   FI XYZEval<float> asLogical()                         const { XYZEval<float> o = asFloat(); toLogical(o); return o; }
   FI XYZEval<float>  asNative()                         const { XYZEval<float> o = asFloat(); toNative(o);  return o; }

Marlin/src/feature/probe_temp_comp.cpp

@@ -52,7 +52,7 @@ const temp_calib_t ProbeTempComp::cali_info[TSI_COUNT] = {
 
 constexpr xyz_pos_t ProbeTempComp::park_point;
 constexpr xy_pos_t ProbeTempComp::measure_point;
-constexpr int ProbeTempComp::probe_calib_bed_temp;
+constexpr celsius_t ProbeTempComp::probe_calib_bed_temp;
 
 uint8_t ProbeTempComp::calib_idx; // = 0
 float ProbeTempComp::init_measurement; // = 0.0
@@ -126,7 +126,7 @@ bool ProbeTempComp::finish_calibration(const TempSensorID tsi) {
       SERIAL_ECHOPGM("Applying linear extrapolation");
       calib_idx--;
       for (; calib_idx < measurements; ++calib_idx) {
-        const float temp = start_temp + float(calib_idx) * res_temp;
+        const celsius_float_t temp = start_temp + float(calib_idx) * res_temp;
         data[calib_idx] = static_cast<int16_t>(k * temp + d);
       }
     }
@@ -174,7 +174,7 @@ float ProbeTempComp::get_offset_for_temperature(const TempSensorID tsi, const_fl
     return xy_float_t({start_temp + i*res_temp, static_cast<float>(data[i])});
   };
 
-  auto linear_interp = [](float x, xy_float_t p1, xy_float_t p2) {
+  auto linear_interp = [](const_float_t x, xy_float_t p1, xy_float_t p2) {
     return (p2.y - p1.y) / (p2.x - p2.y) * (x - p1.x) + p1.y;
   };
 

Marlin/src/feature/probe_temp_comp.h

@@ -100,8 +100,8 @@ class ProbeTempComp {
     static constexpr xy_pos_t measure_point    = PTC_PROBE_POS;     // Coordinates to probe
                             //measure_point    = { 12.0f, 7.3f };   // Coordinates for the MK52 magnetic heatbed
 
-    static constexpr int  probe_calib_bed_temp = BED_MAX_TARGET,  // Bed temperature while calibrating probe
+    static constexpr celsius_t probe_calib_bed_temp = BED_MAX_TARGET,  // Bed temperature while calibrating probe
-                          bed_calib_probe_temp = BTC_PROBE_TEMP;  // Probe temperature while calibrating bed
+                               bed_calib_probe_temp = BTC_PROBE_TEMP;  // Probe temperature while calibrating bed
 
     static int16_t *sensor_z_offsets[TSI_COUNT],
                    z_offsets_probe[cali_info_init[TSI_PROBE].measurements], // (µm)

Marlin/src/gcode/calibrate/G76_M192_M871.cpp

@@ -110,7 +110,7 @@ void GcodeSuite::G76() {
     return false;
   };
 
-  auto g76_probe = [](const TempSensorID sid, uint16_t &targ, const xy_pos_t &nozpos) {
+  auto g76_probe = [](const TempSensorID sid, celsius_t &targ, const xy_pos_t &nozpos) {
     do_z_clearance(5.0); // Raise nozzle before probing
     const float measured_z = probe.probe_at_point(nozpos, PROBE_PT_STOW, 0, false);  // verbose=0, probe_relative=false
     if (isnan(measured_z))
@@ -170,14 +170,14 @@ void GcodeSuite::G76() {
   // Report temperatures every second and handle heating timeouts
   millis_t next_temp_report = millis() + 1000;
 
-  auto report_targets = [&](const uint16_t tb, const uint16_t tp) {
+  auto report_targets = [&](const celsius_t tb, const celsius_t tp) {
     SERIAL_ECHOLNPAIR("Target Bed:", tb, " Probe:", tp);
   };
 
   if (do_bed_cal) {
 
-    uint16_t target_bed = cali_info_init[TSI_BED].start_temp,
+    celsius_t target_bed = cali_info_init[TSI_BED].start_temp,
-             target_probe = temp_comp.bed_calib_probe_temp;
+            target_probe = temp_comp.bed_calib_probe_temp;
 
     say_waiting_for(); SERIAL_ECHOLNPGM(" cooling.");
     while (thermalManager.degBed() > target_bed || thermalManager.degProbe() > target_probe)
@@ -236,10 +236,10 @@ void GcodeSuite::G76() {
     do_blocking_move_to(parkpos);
 
     // Initialize temperatures
-    const uint16_t target_bed = temp_comp.probe_calib_bed_temp;
+    const celsius_t target_bed = temp_comp.probe_calib_bed_temp;
     thermalManager.setTargetBed(target_bed);
 
-    uint16_t target_probe = cali_info_init[TSI_PROBE].start_temp;
+    celsius_t target_probe = cali_info_init[TSI_PROBE].start_temp;
 
     report_targets(target_bed, target_probe);
 

Marlin/src/gcode/temp/M303.cpp

@@ -57,7 +57,7 @@ void GcodeSuite::M303() {
   #endif
 
   const heater_id_t hid = (heater_id_t)parser.intval('E');
-  int16_t default_temp;
+  celsius_t default_temp;
   switch (hid) {
     #if ENABLED(PIDTEMP)
       case 0 ... HOTENDS - 1: default_temp = PREHEAT_1_TEMP_HOTEND; break;
@@ -74,7 +74,7 @@ void GcodeSuite::M303() {
       return;
   }
 
-  const int16_t temp = parser.celsiusval('S', default_temp);
+  const celsius_t temp = parser.celsiusval('S', default_temp);
   const int c = parser.intval('C', 5);
   const bool u = parser.boolval('U');
 

Marlin/src/lcd/extui/lib/anycubic_chiron/chiron_tft.cpp

@@ -373,10 +373,9 @@ int8_t ChironTFT::FindToken(char c) {
 
 void ChironTFT::CheckHeaters() {
   uint8_t faultDuration = 0;
-  float temp = 0;
 
   // if the hotend temp is abnormal, confirm state before signalling panel
-  temp = getActualTemp_celsius(E0);
+  celsius_float_t temp = getActualTemp_celsius(E0);
   while (!WITHIN(temp, HEATER_0_MINTEMP, HEATER_0_MAXTEMP)) {
     faultDuration++;
     if (faultDuration >= AC_HEATER_FAULT_VALIDATION_TIME) {

Marlin/src/lcd/extui/lib/anycubic_i3mega/anycubic_i3mega_lcd.cpp

@@ -534,6 +534,8 @@ void AnycubicTFTClass::OnPrintTimerStopped() {
   #endif
 }
 
+#define ROUND(val) int((val)+0.5f)
+
 void AnycubicTFTClass::GetCommandFromTFT() {
   char *starpos = nullptr;
   while (LCD_SERIAL.available() > 0  && TFTbuflen < TFTBUFSIZE) {
@@ -560,26 +562,26 @@ void AnycubicTFTClass::GetCommandFromTFT() {
 
         switch (a_command) {
           case 0: { // A0 GET HOTEND TEMP
-            const float hotendActualTemp = getActualTemp_celsius(E0);
+            const celsius_float_t hotendActualTemp = getActualTemp_celsius(E0);
-            SEND_PGM_VAL("A0V ", int(hotendActualTemp + 0.5));
+            SEND_PGM_VAL("A0V ", ROUND(hotendActualTemp));
           }
           break;
 
           case 1: { // A1  GET HOTEND TARGET TEMP
-            const float hotendTargetTemp = getTargetTemp_celsius(E0);
+            const celsius_float_t hotendTargetTemp = getTargetTemp_celsius(E0);
-            SEND_PGM_VAL("A1V ", int(hotendTargetTemp + 0.5));
+            SEND_PGM_VAL("A1V ", ROUND(hotendTargetTemp));
           }
           break;
 
           case 2: { // A2 GET HOTBED TEMP
-            const float heatedBedActualTemp = getActualTemp_celsius(BED);
+            const celsius_float_t heatedBedActualTemp = getActualTemp_celsius(BED);
-            SEND_PGM_VAL("A2V ", int(heatedBedActualTemp + 0.5));
+            SEND_PGM_VAL("A2V ", ROUND(heatedBedActualTemp));
           }
           break;
 
           case 3: { // A3 GET HOTBED TARGET TEMP
-            const float heatedBedTargetTemp = getTargetTemp_celsius(BED);
+            const celsius_float_t heatedBedTargetTemp = getTargetTemp_celsius(BED);
-            SEND_PGM_VAL("A3V ", int(heatedBedTargetTemp + 0.5));
+            SEND_PGM_VAL("A3V ", ROUND(heatedBedTargetTemp));
           } break;
 
           case 4: { // A4 GET FAN SPEED

Marlin/src/lcd/extui/lib/ftdi_eve_touch_ui/screens/string_format.cpp

@@ -33,28 +33,28 @@
 /**
  * Formats a temperature string (e.g. "100°C")
  */
-void format_temp(char *str, float t1) {
+void format_temp(char *str, const_celsius_float_t t1) {
   sprintf_P(str, PSTR("%3d" S_FMT), ROUND(t1), GET_TEXT(MSG_UNITS_C));
 }
 
 /**
  * Formats a temperature string for an idle heater (e.g. "100 °C / idle")
  */
-void format_temp_and_idle(char *str, float t1) {
+void format_temp_and_idle(char *str, const_celsius_float_t t1) {
   sprintf_P(str, PSTR("%3d" S_FMT " / " S_FMT), ROUND(t1), GET_TEXT(MSG_UNITS_C), GET_TEXT(MSG_IDLE));
 }
 
 /**
  * Formats a temperature string for an active heater (e.g. "100 / 200°C")
  */
-void format_temp_and_temp(char *str, float t1, float t2) {
+void format_temp_and_temp(char *str, const_celsius_float_t t1, const_celsius_float_t t2) {
   sprintf_P(str, PSTR("%3d / %3d" S_FMT), ROUND(t1), ROUND(t2), GET_TEXT(MSG_UNITS_C));
 }
 
 /**
  * Formats a temperature string for a material (e.g. "100°C (PLA)")
  */
-void format_temp_and_material(char *str, float t1, const char *material) {
+void format_temp_and_material(char *str, const_celsius_float_t t1, const char *material) {
   sprintf_P(str, PSTR("%3d" S_FMT " (" S_FMT ")"), ROUND(t1), GET_TEXT(MSG_UNITS_C), material);
 }
 

Marlin/src/lcd/extui/lib/ftdi_eve_touch_ui/screens/string_format.h

@@ -21,9 +21,9 @@
 
 #pragma once
 
-void format_temp(char *str, float t1);
+void format_temp(char *str, const_celsius_float_t t1);
-void format_temp_and_idle(char *str, float t1);
+void format_temp_and_idle(char *str, const_celsius_float_t t1);
-void format_temp_and_temp(char *str, float t1, float t2);
+void format_temp_and_temp(char *str, const_celsius_float_t t1, const_celsius_float_t t2);
-void format_temp_and_material(char *str, float t1, const char *material);
+void format_temp_and_material(char *str, const_celsius_float_t t1, const char *material);
 void format_position(char *str, float p, uint8_t decimals = 1);
 void format_position(char *str, float x, float y, float z);

Marlin/src/lcd/extui/lib/nextion/nextion_tft.cpp

@@ -595,8 +595,8 @@ void NextionTFT::PanelAction(uint8_t req) {
 void NextionTFT::UpdateOnChange() {
   const millis_t ms = millis();
   static millis_t next_event_ms = 0;
-  static float last_degBed = 999, last_degHotend0 = 999, last_degHotend1 = 999,
+  static celsius_float_t last_degBed = 999, last_degHotend0 = 999, last_degHotend1 = 999,
-               last_degTargetBed = 999, last_degTargetHotend0 = 999, last_degTargetHotend1 = 999;
+                         last_degTargetBed = 999, last_degTargetHotend0 = 999, last_degTargetHotend1 = 999;
 
   // tmppage Temperature
   if (!WITHIN(last_degHotend0 - getActualTemp_celsius(E0), -0.2, 0.2) || !WITHIN(last_degTargetHotend0 - getTargetTemp_celsius(E0), -0.5, 0.5)) {

Marlin/src/lcd/extui/ui_api.cpp

@@ -263,7 +263,7 @@ namespace ExtUI {
     #define GET_TEMP_ADJUSTMENT(A) A
   #endif
 
-  float getActualTemp_celsius(const heater_t heater) {
+  celsius_float_t getActualTemp_celsius(const heater_t heater) {
     switch (heater) {
       #if ENABLED(HAS_HEATED_BED)
         case BED: return GET_TEMP_ADJUSTMENT(thermalManager.degBed());
@@ -275,11 +275,11 @@ namespace ExtUI {
     }
   }
 
-  float getActualTemp_celsius(const extruder_t extruder) {
+  celsius_float_t getActualTemp_celsius(const extruder_t extruder) {
     return GET_TEMP_ADJUSTMENT(thermalManager.degHotend(extruder - E0));
   }
 
-  float getTargetTemp_celsius(const heater_t heater) {
+  celsius_float_t getTargetTemp_celsius(const heater_t heater) {
     switch (heater) {
       #if ENABLED(HAS_HEATED_BED)
         case BED: return GET_TEMP_ADJUSTMENT(thermalManager.degTargetBed());
@@ -291,7 +291,7 @@ namespace ExtUI {
     }
   }
 
-  float getTargetTemp_celsius(const extruder_t extruder) {
+  celsius_float_t getTargetTemp_celsius(const extruder_t extruder) {
     return GET_TEMP_ADJUSTMENT(thermalManager.degTargetHotend(extruder - E0));
   }
 

Marlin/src/lcd/extui/ui_api.h

@@ -109,10 +109,10 @@ namespace ExtUI {
     void setTMCBumpSensitivity(const_float_t , const axis_t);
   #endif
 
-  float getActualTemp_celsius(const heater_t);
+  celsius_float_t getActualTemp_celsius(const heater_t);
-  float getActualTemp_celsius(const extruder_t);
+  celsius_float_t getActualTemp_celsius(const extruder_t);
-  float getTargetTemp_celsius(const heater_t);
+  celsius_float_t getTargetTemp_celsius(const heater_t);
-  float getTargetTemp_celsius(const extruder_t);
+  celsius_float_t getTargetTemp_celsius(const extruder_t);
   float getTargetFan_percent(const fan_t);
   float getActualFan_percent(const fan_t);
   float getAxisPosition_mm(const axis_t);

Marlin/src/module/probe.cpp

@@ -352,7 +352,7 @@ FORCE_INLINE void probe_specific_action(const bool deploy) {
    *  - If a preheat input is higher than the current target, raise the target temperature.
    *  - If a preheat input is higher than the current temperature, wait for stabilization.
    */
-  void Probe::preheat_for_probing(const int16_t hotend_temp, const int16_t bed_temp) {
+  void Probe::preheat_for_probing(const celsius_t hotend_temp, const celsius_t bed_temp) {
     #if HAS_HOTEND && (PROBING_NOZZLE_TEMP || LEVELING_NOZZLE_TEMP)
       #define WAIT_FOR_NOZZLE_HEAT
     #endif
@@ -363,17 +363,17 @@ FORCE_INLINE void probe_specific_action(const bool deploy) {
     DEBUG_ECHOPGM("Preheating ");
 
     #if ENABLED(WAIT_FOR_NOZZLE_HEAT)
-      const int16_t hotendPreheat = hotend_temp > thermalManager.degTargetHotend(0) ? hotend_temp : 0;
+      const celsius_t hotendPreheat = hotend_temp > thermalManager.degTargetHotend(0) ? hotend_temp : 0;
       if (hotendPreheat) {
         DEBUG_ECHOPAIR("hotend (", hotendPreheat, ")");
         thermalManager.setTargetHotend(hotendPreheat, 0);
       }
     #elif ENABLED(WAIT_FOR_BED_HEAT)
-      constexpr int16_t hotendPreheat = 0;
+      constexpr celsius_t hotendPreheat = 0;
     #endif
 
     #if ENABLED(WAIT_FOR_BED_HEAT)
-      const int16_t bedPreheat = bed_temp > thermalManager.degTargetBed() ? bed_temp : 0;
+      const celsius_t bedPreheat = bed_temp > thermalManager.degTargetBed() ? bed_temp : 0;
       if (bedPreheat) {
         if (hotendPreheat) DEBUG_ECHOPGM(" and ");
         DEBUG_ECHOPAIR("bed (", bedPreheat, ")");

Marlin/src/module/probe.h

@@ -61,7 +61,7 @@ public:
     static xyz_pos_t offset;
 
     #if EITHER(PREHEAT_BEFORE_PROBING, PREHEAT_BEFORE_LEVELING)
-      static void preheat_for_probing(const int16_t hotend_temp, const int16_t bed_temp);
+      static void preheat_for_probing(const celsius_t hotend_temp, const celsius_t bed_temp);
     #endif
 
     static bool set_deployed(const bool deploy);

Marlin/src/module/temperature.cpp

@@ -382,7 +382,7 @@ const char str_t_thermal_runaway[] PROGMEM = STR_T_THERMAL_RUNAWAY,
   chamber_info_t Temperature::temp_chamber; // = { 0 }
   #if HAS_HEATED_CHAMBER
     millis_t next_cool_check_ms_2 = 0;
-    float old_temp = 9999;
+    celsius_float_t old_temp = 9999;
     int16_t Temperature::mintemp_raw_CHAMBER = TEMP_SENSOR_CHAMBER_RAW_LO_TEMP,
             Temperature::maxtemp_raw_CHAMBER = TEMP_SENSOR_CHAMBER_RAW_HI_TEMP;
     TERN_(WATCH_CHAMBER, chamber_watch_t Temperature::watch_chamber{0});
@@ -395,7 +395,7 @@ const char str_t_thermal_runaway[] PROGMEM = STR_T_THERMAL_RUNAWAY,
   #if HAS_COOLER
     bool flag_cooler_state;
     //bool flag_cooler_excess = false;
-    float previous_temp = 9999;
+    celsius_float_t previous_temp = 9999;
     int16_t Temperature::mintemp_raw_COOLER = TEMP_SENSOR_COOLER_RAW_LO_TEMP,
             Temperature::maxtemp_raw_COOLER = TEMP_SENSOR_COOLER_RAW_HI_TEMP;
     #if WATCH_COOLER
@@ -421,8 +421,8 @@ const char str_t_thermal_runaway[] PROGMEM = STR_T_THERMAL_RUNAWAY,
 #endif
 
 #if ENABLED(TEMP_SENSOR_1_AS_REDUNDANT)
-  celsius_t Temperature::redundant_temperature_raw = 0;
+  int16_t Temperature::redundant_temperature_raw = 0;
-  float Temperature::redundant_temperature = 0.0;
+  celsius_float_t Temperature::redundant_temperature = 0.0;
 #endif
 
 volatile bool Temperature::raw_temps_ready = false;
@@ -508,7 +508,7 @@ volatile bool Temperature::raw_temps_ready = false;
     long t_high = 0, t_low = 0;
 
     PID_t tune_pid = { 0, 0, 0 };
-    float maxT = 0, minT = 10000;
+    celsius_float_t maxT = 0, minT = 10000;
 
     const bool isbed = (heater_id == H_BED);
     const bool ischamber = (heater_id == H_CHAMBER);
@@ -544,9 +544,9 @@ volatile bool Temperature::raw_temps_ready = false;
       #define GTV(C,B,H) C_GTV(ischamber, C, B_GTV(isbed, B, H))
       const uint16_t watch_temp_period = GTV(WATCH_CHAMBER_TEMP_PERIOD, WATCH_BED_TEMP_PERIOD, WATCH_TEMP_PERIOD);
       const uint8_t watch_temp_increase = GTV(WATCH_CHAMBER_TEMP_INCREASE, WATCH_BED_TEMP_INCREASE, WATCH_TEMP_INCREASE);
-      const float watch_temp_target = target - float(watch_temp_increase + GTV(TEMP_CHAMBER_HYSTERESIS, TEMP_BED_HYSTERESIS, TEMP_HYSTERESIS) + 1);
+      const celsius_float_t watch_temp_target = celsius_float_t(target - watch_temp_increase + GTV(TEMP_CHAMBER_HYSTERESIS, TEMP_BED_HYSTERESIS, TEMP_HYSTERESIS) + 1);
       millis_t temp_change_ms = next_temp_ms + SEC_TO_MS(watch_temp_period);
-      float next_watch_temp = 0.0;
+      celsius_float_t next_watch_temp = 0.0;
       bool heated = false;
     #endif
 
@@ -567,7 +567,7 @@ volatile bool Temperature::raw_temps_ready = false;
     SHV(bias);
 
     #if ENABLED(PRINTER_EVENT_LEDS)
-      const float start_temp = GHV(temp_chamber.celsius, temp_bed.celsius, temp_hotend[heater_id].celsius);
+      const celsius_float_t start_temp = GHV(temp_chamber.celsius, temp_bed.celsius, temp_hotend[heater_id].celsius);
       LEDColor color = ONHEATINGSTART();
     #endif
 
@@ -2338,7 +2338,7 @@ void Temperature::init() {
    *
    * TODO: Embed the last 3 parameters during init, if not less optimal
    */
-  void Temperature::tr_state_machine_t::run(const_float_t current, const_float_t target, const heater_id_t heater_id, const uint16_t period_seconds, const celsius_t hysteresis_degc) {
+  void Temperature::tr_state_machine_t::run(const_celsius_float_t current, const_celsius_float_t target, const heater_id_t heater_id, const uint16_t period_seconds, const celsius_t hysteresis_degc) {
 
     #if HEATER_IDLE_HANDLER
       // Convert the given heater_id_t to an idle array index
@@ -3373,7 +3373,16 @@ void Temperature::isr() {
 
   #include "../gcode/gcode.h"
 
-  static void print_heater_state(const_float_t c, const_float_t t
+  /**
+   * Print a single heater state in the form:
+   *        Bed: " B:nnn.nn /nnn.nn"
+   *    Chamber: " C:nnn.nn /nnn.nn"
+   *      Probe: " P:nnn.nn /nnn.nn"
+   *     Cooler: " L:nnn.nn /nnn.nn"
+   *   Extruder: " T0:nnn.nn /nnn.nn"
+   *   With ADC: " T0:nnn.nn /nnn.nn (nnn.nn)"
+   */
+  static void print_heater_state(const_celsius_float_t c, const_celsius_float_t t
     #if ENABLED(SHOW_TEMP_ADC_VALUES)
       , const float r
     #endif
@@ -3557,12 +3566,12 @@ void Temperature::isr() {
       #endif
 
       #if ENABLED(PRINTER_EVENT_LEDS)
-        const float start_temp = degHotend(target_extruder);
+        const celsius_float_t start_temp = degHotend(target_extruder);
         printerEventLEDs.onHotendHeatingStart();
       #endif
 
       bool wants_to_cool = false;
-      float target_temp = -1.0, old_temp = 9999.0;
+      celsius_float_t target_temp = -1.0, old_temp = 9999.0;
       millis_t now, next_temp_ms = 0, next_cool_check_ms = 0;
       wait_for_heatup = true;
       do {
@@ -3592,7 +3601,7 @@ void Temperature::isr() {
         idle();
         gcode.reset_stepper_timeout(); // Keep steppers powered
 
-        const float temp = degHotend(target_extruder);
+        const celsius_float_t temp = degHotend(target_extruder);
 
         #if ENABLED(PRINTER_EVENT_LEDS)
           // Gradually change LED strip from violet to red as nozzle heats up
@@ -3601,7 +3610,7 @@ void Temperature::isr() {
 
         #if TEMP_RESIDENCY_TIME > 0
 
-          const float temp_diff = ABS(target_temp - temp);
+          const celsius_float_t temp_diff = ABS(target_temp - temp);
 
           if (!residency_start_ms) {
             // Start the TEMP_RESIDENCY_TIME timer when we reach target temp for the first time.
@@ -3695,12 +3704,12 @@ void Temperature::isr() {
       #endif
 
       #if ENABLED(PRINTER_EVENT_LEDS)
-        const float start_temp = degBed();
+        const celsius_float_t start_temp = degBed();
         printerEventLEDs.onBedHeatingStart();
       #endif
 
       bool wants_to_cool = false;
-      float target_temp = -1, old_temp = 9999;
+      celsius_float_t target_temp = -1, old_temp = 9999;
       millis_t now, next_temp_ms = 0, next_cool_check_ms = 0;
       wait_for_heatup = true;
       do {
@@ -3730,7 +3739,7 @@ void Temperature::isr() {
         idle();
         gcode.reset_stepper_timeout(); // Keep steppers powered
 
-        const float temp = degBed();
+        const celsius_float_t temp = degBed();
 
         #if ENABLED(PRINTER_EVENT_LEDS)
           // Gradually change LED strip from blue to violet as bed heats up
@@ -3739,7 +3748,7 @@ void Temperature::isr() {
 
         #if TEMP_BED_RESIDENCY_TIME > 0
 
-          const float temp_diff = ABS(target_temp - temp);
+          const celsius_float_t temp_diff = ABS(target_temp - temp);
 
           if (!residency_start_ms) {
             // Start the TEMP_BED_RESIDENCY_TIME timer when we reach target temp for the first time.
@@ -4021,11 +4030,11 @@ void Temperature::isr() {
         idle();
         gcode.reset_stepper_timeout(); // Keep steppers powered
 
-        const float current_temp = degCooler();
+        const celsius_float_t current_temp = degCooler();
 
         #if TEMP_COOLER_RESIDENCY_TIME > 0
 
-          const float temp_diff = ABS(target_temp - temp);
+          const celsius_float_t temp_diff = ABS(target_temp - temp);
 
           if (!residency_start_ms) {
             // Start the TEMP_COOLER_RESIDENCY_TIME timer when we reach target temp for the first time.

Marlin/src/module/temperature.h

@@ -961,7 +961,7 @@ class Temperature {
         millis_t timer = 0;
         TRState state = TRInactive;
         float running_temp;
-        void run(const_float_t current, const_float_t target, const heater_id_t heater_id, const uint16_t period_seconds, const celsius_t hysteresis_degc);
+        void run(const_celsius_float_t current, const_celsius_float_t target, const heater_id_t heater_id, const uint16_t period_seconds, const celsius_t hysteresis_degc);
       } tr_state_machine_t;
 
       static tr_state_machine_t tr_state_machine[NR_HEATER_RUNAWAY];