Remove temp_cal_active variable.

This saves 18B of FLASH and 1B of RAM memory. This variable was duplicate to EEPROM variable of the same name.

Firmware/Marlin.h

@@ -334,7 +334,6 @@ extern unsigned long stoptime;
 extern int bowden_length[4];
 extern bool is_usb_printing;
 extern bool homing_flag;
-extern bool temp_cal_active;
 extern bool loading_flag;
 extern unsigned int usb_printing_counter;
 

Firmware/Marlin_main.cpp

@@ -202,8 +202,6 @@ int bowden_length[4] = {385, 385, 385, 385};
 bool is_usb_printing = false;
 bool homing_flag = false;
 
-bool temp_cal_active = false;
-
 unsigned long kicktime = _millis()+100000;
 
 unsigned int  usb_printing_counter;
@@ -1465,8 +1463,7 @@ void setup()
 
 	if (eeprom_read_byte((uint8_t*)EEPROM_TEMP_CAL_ACTIVE) == 255) {
 		eeprom_write_byte((uint8_t*)EEPROM_TEMP_CAL_ACTIVE, 0);
-		temp_cal_active = false;
-	} else temp_cal_active = eeprom_read_byte((uint8_t*)EEPROM_TEMP_CAL_ACTIVE);
+	}
 
 	if (eeprom_read_byte((uint8_t*)EEPROM_CALIBRATION_STATUS_PINDA) == 255) {
 		//eeprom_write_byte((uint8_t*)EEPROM_CALIBRATION_STATUS_PINDA, 0);
@@ -1474,7 +1471,6 @@ void setup()
 		int16_t z_shift = 0;
 		for (uint8_t i = 0; i < 5; i++) EEPROM_save_B(EEPROM_PROBE_TEMP_SHIFT + i * 2, &z_shift);
 		eeprom_write_byte((uint8_t*)EEPROM_TEMP_CAL_ACTIVE, 0);
-		temp_cal_active = false;
 	}
 	if (eeprom_read_byte((uint8_t*)EEPROM_UVLO) == 255) {
 		eeprom_write_byte((uint8_t*)EEPROM_UVLO, 0);
@@ -1547,7 +1543,7 @@ void setup()
 		  lcd_show_fullscreen_message_and_wait_P(_T(MSG_BABYSTEP_Z_NOT_SET));
 		  lcd_update_enable(true);
 	  }
-	  else if (calibration_status() == CALIBRATION_STATUS_CALIBRATED && temp_cal_active == true && calibration_status_pinda() == false) {
+	  else if (calibration_status() == CALIBRATION_STATUS_CALIBRATED && eeprom_read_byte((unsigned char *)EEPROM_TEMP_CAL_ACTIVE) && calibration_status_pinda() == false) {
 		  //lcd_show_fullscreen_message_and_wait_P(_i("Temperature calibration has not been run yet"));////MSG_PINDA_NOT_CALIBRATED c=20 r=4
 		  lcd_update_enable(true);
 	  }
@@ -4827,7 +4823,6 @@ if(eSoundMode!=e_SOUND_MODE_SILENT)
 			disable_e2();
 			setTargetBed(0); //set bed target temperature back to 0
 		lcd_show_fullscreen_message_and_wait_P(_T(MSG_TEMP_CALIBRATION_DONE));
-		temp_cal_active = true;
 		eeprom_update_byte((unsigned char *)EEPROM_TEMP_CAL_ACTIVE, 1);
 		lcd_update_enable(true);
 		lcd_update(2);		
@@ -5253,7 +5248,7 @@ if(eSoundMode!=e_SOUND_MODE_SILENT)
 		go_home_with_z_lift();
 //		SERIAL_ECHOLNPGM("Go home finished");
 		//unretract (after PINDA preheat retraction)
-		if (degHotend(active_extruder) > EXTRUDE_MINTEMP && temp_cal_active == true && calibration_status_pinda() == true && target_temperature_bed >= 50) {
+		if ((degHotend(active_extruder) > EXTRUDE_MINTEMP) && eeprom_read_byte((unsigned char *)EEPROM_TEMP_CAL_ACTIVE) && calibration_status_pinda() && (target_temperature_bed >= 50)) {
 			current_position[E_AXIS] += default_retraction;
 			plan_buffer_line_curposXYZE(400);
 		}
@@ -10548,7 +10543,7 @@ float temp_comp_interpolation(float inp_temperature) {
 #ifdef PINDA_THERMISTOR
 float temp_compensation_pinda_thermistor_offset(float temperature_pinda)
 {
-	if (!temp_cal_active) return 0;
+	if (!eeprom_read_byte((unsigned char *)EEPROM_TEMP_CAL_ACTIVE)) return 0;
 	if (!calibration_status_pinda()) return 0;
 	return temp_comp_interpolation(temperature_pinda) / cs.axis_steps_per_unit[Z_AXIS];
 }

Firmware/ultralcd.cpp

@@ -3920,14 +3920,12 @@ void lcd_temp_cal_show_result(bool result) {
 		eeprom_update_byte((uint8_t*)EEPROM_CALIBRATION_STATUS_PINDA, 1);
 		SERIAL_ECHOLNPGM("Temperature calibration done. Continue with pressing the knob.");
 		lcd_show_fullscreen_message_and_wait_P(_T(MSG_TEMP_CALIBRATION_DONE));
-		temp_cal_active = true;
 		eeprom_update_byte((unsigned char *)EEPROM_TEMP_CAL_ACTIVE, 1);
 	}
 	else {
 		eeprom_update_byte((uint8_t*)EEPROM_CALIBRATION_STATUS_PINDA, 0);
 		SERIAL_ECHOLNPGM("Temperature calibration failed. Continue with pressing the knob.");
 		lcd_show_fullscreen_message_and_wait_P(_i("Temperature calibration failed"));////MSG_TEMP_CAL_FAILED c=20 r=8
-		temp_cal_active = false;
 		eeprom_update_byte((unsigned char *)EEPROM_TEMP_CAL_ACTIVE, 0);
 	}
 	lcd_update_enable(true);
@@ -4635,6 +4633,7 @@ void lcd_pinda_calibration_menu()
 }
 
 void lcd_temp_calibration_set() {
+	bool temp_cal_active = eeprom_read_byte((unsigned char *)EEPROM_TEMP_CAL_ACTIVE);
 	temp_cal_active = !temp_cal_active;
 	eeprom_update_byte((unsigned char *)EEPROM_TEMP_CAL_ACTIVE, temp_cal_active);
 	st_current_init();
@@ -5766,7 +5765,7 @@ static void lcd_settings_menu()
     MENU_ITEM_SUBMENU_P(_i("Lin. correction"), lcd_settings_linearity_correction_menu);
 #endif //LINEARITY_CORRECTION && TMC2130
 
-	MENU_ITEM_TOGGLE_P(_T(MSG_TEMP_CALIBRATION), temp_cal_active ? _T(MSG_ON) : _T(MSG_OFF), lcd_temp_calibration_set);
+	MENU_ITEM_TOGGLE_P(_T(MSG_TEMP_CALIBRATION), eeprom_read_byte((unsigned char *)EEPROM_TEMP_CAL_ACTIVE) ? _T(MSG_ON) : _T(MSG_OFF), lcd_temp_calibration_set);
 
 #ifdef HAS_SECOND_SERIAL_PORT
     MENU_ITEM_TOGGLE_P(_T(MSG_RPI_PORT), (selectedSerialPort == 0) ? _T(MSG_OFF) : _T(MSG_ON), lcd_second_serial_set);