🎨 CONF_SERIAL_IS => SERIAL_IN_USE

Marlin/src/HAL/AVR/inc/SanityCheck.h

   || X_ENA_PIN  == N || Y_ENA_PIN  == N || Z_ENA_PIN  == N \
   || BTN_EN1    == N || BTN_EN2    == N \
 )
-#if CONF_SERIAL_IS(0)
+#if SERIAL_IN_USE(0)
   // D0-D1. No known conflicts.
 #endif
 #if NOT_TARGET(__AVR_ATmega644P__, __AVR_ATmega1284P__)
-  #if CONF_SERIAL_IS(1) && (CHECK_SERIAL_PIN(18) || CHECK_SERIAL_PIN(19))
+  #if SERIAL_IN_USE(1) && (CHECK_SERIAL_PIN(18) || CHECK_SERIAL_PIN(19))
     #error "Serial Port 1 pin D18 and/or D19 conflicts with another pin on the board."
   #endif
 #else
-  #if CONF_SERIAL_IS(1) && (CHECK_SERIAL_PIN(10) || CHECK_SERIAL_PIN(11))
+  #if SERIAL_IN_USE(1) && (CHECK_SERIAL_PIN(10) || CHECK_SERIAL_PIN(11))
     #error "Serial Port 1 pin D10 and/or D11 conflicts with another pin on the board."
   #endif
 #endif
-#if CONF_SERIAL_IS(2) && (CHECK_SERIAL_PIN(16) || CHECK_SERIAL_PIN(17))
+#if SERIAL_IN_USE(2) && (CHECK_SERIAL_PIN(16) || CHECK_SERIAL_PIN(17))
   #error "Serial Port 2 pin D16 and/or D17 conflicts with another pin on the board."
 #endif
-#if CONF_SERIAL_IS(3) && (CHECK_SERIAL_PIN(14) || CHECK_SERIAL_PIN(15))
+#if SERIAL_IN_USE(3) && (CHECK_SERIAL_PIN(14) || CHECK_SERIAL_PIN(15))
   #error "Serial Port 3 pin D14 and/or D15 conflicts with another pin on the board."
 #endif
 #undef CHECK_SERIAL_PIN

Marlin/src/HAL/DUE/inc/SanityCheck.h

   || X_DIR_PIN  == N || Y_DIR_PIN  == N || Z_DIR_PIN  == N \
   || X_ENA_PIN  == N || Y_ENA_PIN  == N || Z_ENA_PIN  == N \
 )
-#if CONF_SERIAL_IS(0) // D0-D1. No known conflicts.
+#if SERIAL_IN_USE(0) // D0-D1. No known conflicts.
 #endif
-#if CONF_SERIAL_IS(1) && (CHECK_SERIAL_PIN(18) || CHECK_SERIAL_PIN(19))
+#if SERIAL_IN_USE(1) && (CHECK_SERIAL_PIN(18) || CHECK_SERIAL_PIN(19))
   #error "Serial Port 1 pin D18 and/or D19 conflicts with another pin on the board."
 #endif
-#if CONF_SERIAL_IS(2) && (CHECK_SERIAL_PIN(16) || CHECK_SERIAL_PIN(17))
+#if SERIAL_IN_USE(2) && (CHECK_SERIAL_PIN(16) || CHECK_SERIAL_PIN(17))
   #error "Serial Port 2 pin D16 and/or D17 conflicts with another pin on the board."
 #endif
-#if CONF_SERIAL_IS(3) && (CHECK_SERIAL_PIN(14) || CHECK_SERIAL_PIN(15))
+#if SERIAL_IN_USE(3) && (CHECK_SERIAL_PIN(14) || CHECK_SERIAL_PIN(15))
   #error "Serial Port 3 pin D14 and/or D15 conflicts with another pin on the board."
 #endif
 #undef CHECK_SERIAL_PIN

Marlin/src/HAL/STM32/eeprom_flash.cpp

   static_assert(IS_FLASH_SECTOR(FLASH_SECTOR), "FLASH_SECTOR is invalid");
   static_assert(IS_POWER_OF_2(FLASH_UNIT_SIZE), "FLASH_UNIT_SIZE should be a power of 2, please check your chip's spec sheet");
 
-#endif
+#endif // FLASH_EEPROM_LEVELING
 
 static bool eeprom_data_written = false;
 
 
       UNLOCK_FLASH();
 
-      uint32_t offset = 0;
-      uint32_t address = SLOT_ADDRESS(current_slot);
-      uint32_t address_end = address + MARLIN_EEPROM_SIZE;
-      uint32_t data = 0;
+      uint32_t offset = 0,
+               address = SLOT_ADDRESS(current_slot),
+               address_end = address + MARLIN_EEPROM_SIZE,
+               data = 0;
 
       bool success = true;
 
       while (address < address_end) {
-        memcpy(&data, ram_eeprom + offset, sizeof(uint32_t));
+        memcpy(&data, ram_eeprom + offset, sizeof(data));
         status = HAL_FLASH_Program(FLASH_TYPEPROGRAM_WORD, address, data);
         if (status == HAL_OK) {
           address += sizeof(uint32_t);
 
       return success;
 
-    #else
+    #else !FLASH_EEPROM_LEVELING
+
       // The following was written for the STM32F4 but may work with other MCUs as well.
       // Most STM32F4 flash does not allow reading from flash during erase operations.
       // This takes about a second on a STM32F407 with a 128kB sector used as EEPROM.
       TERN_(HAS_PAUSE_SERVO_OUTPUT, RESUME_SERVO_OUTPUT());
 
       eeprom_data_written = false;
-    #endif
+
+    #endif // !FLASH_EEPROM_LEVELING
   }
 
   return true;

Marlin/src/inc/Conditionals_post.h

 //
 
 // Flag the indexed hardware serial ports in use
-#define CONF_SERIAL_IS(N) (  (defined(SERIAL_PORT)      && SERIAL_PORT == N) \
+#define SERIAL_IN_USE(N) (  (defined(SERIAL_PORT)      && SERIAL_PORT == N) \
                           || (defined(SERIAL_PORT_2)    && SERIAL_PORT_2 == N) \
                           || (defined(SERIAL_PORT_3)    && SERIAL_PORT_3 == N) \
                           || (defined(MMU2_SERIAL_PORT) && MMU2_SERIAL_PORT == N) \
 
 // Flag the named hardware serial ports in use
 #define TMC_UART_IS(A,N) (defined(A##_HARDWARE_SERIAL) && (CAT(HW_,A##_HARDWARE_SERIAL) == HW_Serial##N || CAT(HW_,A##_HARDWARE_SERIAL) == HW_MSerial##N))
-#define ANY_SERIAL_IS(N) (  CONF_SERIAL_IS(N) \
+#define ANY_SERIAL_IS(N) (  SERIAL_IN_USE(N) \
                          || TMC_UART_IS(X,  N) || TMC_UART_IS(Y , N) || TMC_UART_IS(Z , N) \
                          || TMC_UART_IS(I,  N) || TMC_UART_IS(J , N) || TMC_UART_IS(K , N) \
                          || TMC_UART_IS(U,  N) || TMC_UART_IS(V , N) || TMC_UART_IS(W , N) \
 #define HW_MSerial9  518
 #define HW_MSerial10 519
 
-#if CONF_SERIAL_IS(-1)
+#if SERIAL_IN_USE(-1)
   #define USING_HW_SERIALUSB 1
 #endif
 #if ANY_SERIAL_IS(0)

Marlin/src/pins/pinsDebug.h

 
 // manually add pins that have names that are macros which don't play well with these macros
 #if ANY(AVR_ATmega2560_FAMILY, AVR_ATmega1284_FAMILY, ARDUINO_ARCH_SAM, TARGET_LPC1768)
-  #if CONF_SERIAL_IS(0)
+  #if SERIAL_IN_USE(0)
     static const char RXD_NAME_0[] PROGMEM = { "RXD0" };
     static const char TXD_NAME_0[] PROGMEM = { "TXD0" };
   #endif
-  #if CONF_SERIAL_IS(1)
+  #if SERIAL_IN_USE(1)
     static const char RXD_NAME_1[] PROGMEM = { "RXD1" };
     static const char TXD_NAME_1[] PROGMEM = { "TXD1" };
   #endif
-  #if CONF_SERIAL_IS(2)
+  #if SERIAL_IN_USE(2)
     static const char RXD_NAME_2[] PROGMEM = { "RXD2" };
     static const char TXD_NAME_2[] PROGMEM = { "TXD2" };
   #endif
-  #if CONF_SERIAL_IS(3)
+  #if SERIAL_IN_USE(3)
     static const char RXD_NAME_3[] PROGMEM = { "RXD3" };
     static const char TXD_NAME_3[] PROGMEM = { "TXD3" };
   #endif
    *     2 bytes containing the digital/analog bool flag
    */
 
-  #if CONF_SERIAL_IS(0)
+  #if SERIAL_IN_USE(0)
     #if EITHER(AVR_ATmega2560_FAMILY, ARDUINO_ARCH_SAM)
       { RXD_NAME_0, 0, true },
       { TXD_NAME_0, 1, true },
     #endif
   #endif
 
-  #if CONF_SERIAL_IS(1)
+  #if SERIAL_IN_USE(1)
     #if EITHER(AVR_ATmega2560_FAMILY, ARDUINO_ARCH_SAM)
       { RXD_NAME_1, 19, true },
       { TXD_NAME_1, 18, true },
     #endif
   #endif
 
-  #if CONF_SERIAL_IS(2)
+  #if SERIAL_IN_USE(2)
     #if EITHER(AVR_ATmega2560_FAMILY, ARDUINO_ARCH_SAM)
       { RXD_NAME_2, 17, true },
       { TXD_NAME_2, 16, true },
     #endif
   #endif
 
-  #if CONF_SERIAL_IS(3)
+  #if SERIAL_IN_USE(3)
     #if EITHER(AVR_ATmega2560_FAMILY, ARDUINO_ARCH_SAM)
       { RXD_NAME_3, 15, true },
       { TXD_NAME_3, 14, true },