Add the ability to log continuously

TEMP_MODEL_LOGGING enables D70 to record precisely each cycle of the
temperature regulation for offline model simulation

Firmware/Marlin_main.cpp

@@ -9144,6 +9144,14 @@ Sigma_Exit:
     };
 #endif
 
+#ifdef TEMP_MODEL_LOGGING
+    case 70: {
+        if(code_seen('I'))
+            temp_model_log_enable(code_value_short());
+        break;
+    }
+#endif
+
 #ifdef HEATBED_ANALYSIS
 
     /*!

Firmware/temperature.cpp

@@ -500,6 +500,11 @@ void set_temp_error(TempErrorSource source, uint8_t index, TempErrorType type)
 
 void handle_temp_error();
 
+#ifdef TEMP_MODEL_LOGGING
+static void temp_model_log_usr();
+static void temp_model_log_isr();
+#endif
+
 void manage_heater()
 {
 #ifdef WATCHDOG
@@ -520,6 +525,10 @@ void manage_heater()
 
     // periodically check fans
     checkFans();
+
+#ifdef TEMP_MODEL_LOGGING
+    temp_model_log_usr();
+#endif
 }
 
 #define PGM_RD_W(x)   (short)pgm_read_word(&x)
@@ -2200,6 +2209,10 @@ static void temp_mgr_isr()
     check_temp_model(); // model-based heater check
 #endif
 
+#ifdef TEMP_MODEL_LOGGING
+    temp_model_log_isr();
+#endif
+
     // PID regulation
     if (pid_tuning_finished)
         temp_mgr_pid();
@@ -2390,4 +2403,76 @@ static void check_temp_model()
             set_temp_error(TempErrorSource::hotend, 0, TempErrorType::model);
     }
 }
+
+#ifdef TEMP_MODEL_LOGGING
+static struct
+{
+    volatile struct
+    {
+        uint32_t stamp;
+        int8_t delta_ms;
+        uint8_t counter;
+        uint8_t cur_pwm;
+        float cur_temp;
+        float cur_amb;
+    } entry;
+
+    uint8_t serial;
+    bool enabled;
+} temp_model_log_buf;
+
+static void temp_model_log_usr()
+{
+    if(!temp_model_log_buf.enabled)
+        return;
+
+    uint8_t counter = temp_model_log_buf.entry.counter;
+    if (counter == temp_model_log_buf.serial)
+        return;
+
+    int8_t delta_ms;
+    uint8_t cur_pwm;
+    float cur_temp;
+    float cur_amb;
+    {
+        TempMgrGuard temp_mgr_guard;
+        delta_ms = temp_model_log_buf.entry.delta_ms;
+        counter = temp_model_log_buf.entry.counter;
+        cur_pwm = temp_model_log_buf.entry.cur_pwm;
+        cur_temp = temp_model_log_buf.entry.cur_temp;
+        cur_amb = temp_model_log_buf.entry.cur_amb;
+    }
+
+    uint8_t d = counter - temp_model_log_buf.serial;
+    temp_model_log_buf.serial = counter;
+
+    printf_P(PSTR("TML %d %d %x %lx %lx\n"), (unsigned)d - 1, (int)delta_ms + 1, (int)cur_pwm,
+        *(unsigned long*)&cur_temp, *(unsigned long*)&cur_amb);
+}
+
+static void temp_model_log_isr()
+{
+    if(!temp_model_log_buf.enabled)
+        return;
+
+    uint32_t stamp = _millis();
+    uint8_t delta_ms = stamp - temp_model_log_buf.entry.stamp - (TEMP_MGR_INTV * 1000);
+    temp_model_log_buf.entry.stamp = stamp;
+
+    ++temp_model_log_buf.entry.counter;
+    temp_model_log_buf.entry.delta_ms = delta_ms;
+    temp_model_log_buf.entry.cur_pwm = soft_pwm[0];
+    temp_model_log_buf.entry.cur_temp = current_temperature_isr[0];
+    temp_model_log_buf.entry.cur_amb = current_temperature_ambient_isr;
+}
+
+void temp_model_log_enable(bool enable)
+{
+    if(enable) {
+        TempMgrGuard temp_mgr_guard;
+        temp_model_log_buf.entry.stamp = _millis();
+    }
+    temp_model_log_buf.enabled = enable;
+}
+#endif
 #endif

Firmware/temperature.h

@@ -228,6 +228,9 @@ FORCE_INLINE void autotempShutdown(){
 }
 
 void PID_autotune(float temp, int extruder, int ncycles);
+#ifdef TEMP_MODEL_LOGGING
+void temp_model_log_enable(bool enable);
+#endif
 
 #ifdef FAN_SOFT_PWM
 extern unsigned char fanSpeedSoftPwm;

Firmware/variants/1_75mm_MK3S-EINSy10a-E3Dv6full.h

@@ -420,6 +420,7 @@
 // model-based temperature check
 #define TEMP_MODEL_CHECK 1
 #define TEMP_MODEL_CHECK_WARN_ONLY 1
+#define TEMP_MODEL_LOGGING 1
 
 /*------------------------------------
  MOTOR CURRENT SETTINGS