Power monitor and display (#17437)

Marlin/src/inc/Conditionals_adv.h

@@ -352,6 +352,17 @@
   #define SD_CONNECTION_IS(...) 0
 #endif
 
+// Power Monitor sensors
+#if EITHER(POWER_MONITOR_CURRENT, POWER_MONITOR_VOLTAGE)
+  #define HAS_POWER_MONITOR 1
+#endif
+#if ENABLED(POWER_MONITOR_VOLTAGE) || defined(POWER_MONITOR_FIXED_VOLTAGE)
+  #define HAS_POWER_MONITOR_VREF 1
+#endif
+#if BOTH(HAS_POWER_MONITOR_VREF, POWER_MONITOR_CURRENT)
+  #define HAS_POWER_MONITOR_WATTS 1
+#endif
+
 // Flag if an EEPROM type is pre-selected
 #if ENABLED(EEPROM_SETTINGS) && NONE(I2C_EEPROM, SPI_EEPROM, QSPI_EEPROM, FLASH_EEPROM_EMULATION, SRAM_EEPROM_EMULATION, SDCARD_EEPROM_EMULATION)
   #define NO_EEPROM_SELECTED 1

Marlin/src/inc/Conditionals_post.h

@@ -30,6 +30,13 @@
   // Extras for CI testing
 #endif
 
+// ADC
+#ifdef BOARD_ADC_VREF
+  #define ADC_VREF BOARD_ADC_VREF
+#else
+  #define ADC_VREF HAL_ADC_VREF
+#endif
+
 // Linear advance uses Jerk since E is an isolated axis
 #if BOTH(HAS_JUNCTION_DEVIATION, LIN_ADVANCE)
   #define HAS_LINEAR_E_JERK 1

Marlin/src/inc/SanityCheck.h

@@ -1480,6 +1480,17 @@ static_assert(hbm[Z_AXIS] >= 0, "HOMING_BUMP_MM.Z must be greater than or equal
   #endif
 #endif
 
+/**
+ * System Power Sensor
+ */
+#if ENABLED(POWER_MONITOR_CURRENT) && !PIN_EXISTS(POWER_MONITOR_CURRENT)
+  #error "POWER_MONITOR_CURRENT requires a valid POWER_MONITOR_CURRENT_PIN."
+#elif ENABLED(POWER_MONITOR_VOLTAGE) && !PIN_EXISTS(POWER_MONITOR_VOLTAGE)
+  #error "POWER_MONITOR_VOLTAGE requires POWER_MONITOR_VOLTAGE_PIN to be defined."
+#elif BOTH(POWER_MONITOR_CURRENT, POWER_MONITOR_VOLTAGE) && POWER_MONITOR_CURRENT_PIN == POWER_MONITOR_VOLTAGE_PIN
+  #error "POWER_MONITOR_CURRENT_PIN and POWER_MONITOR_VOLTAGE_PIN must be different."
+#endif
+
 /**
  * Volumetric Extruder Limit
  */