Finish STM32F4 SD-based settings storage (#14844)

Marlin/src/HAL/HAL_STM32/persistent_store_sdcard.cpp

  */
 
 /**
- * HAL for stm32duino.com based on Libmaple and compatible (STM32F1)
  * Implementation of EEPROM settings in SD Card
  */
 
-#ifdef TARGET_STM32F4
+#if defined(ARDUINO_ARCH_STM32) && !defined(STM32GENERIC)
 
 #include "../../inc/MarlinConfig.h"
 
-#if ENABLED(EEPROM_SETTINGS) && NONE(FLASH_EEPROM_EMULATION, SPI_EEPROM, I2C_EEPROM)
+#if ENABLED(EEPROM_SETTINGS) && NONE(FLASH_EEPROM_EMULATION, SRAM_EEPROM_EMULATION, SPI_EEPROM, I2C_EEPROM)
 
 #include "../shared/persistent_store_api.h"
 
 #ifndef E2END
   #define E2END 0xFFF // 4KB
 #endif
-#define HAL_EEPROM_SIZE (E2END + 1) // 16KB
+#define HAL_EEPROM_SIZE int(E2END + 1)
 
-#define _ALIGN(x) __attribute__ ((aligned(x))) // SDIO uint32_t* compat.
+#define _ALIGN(x) __attribute__ ((aligned(x)))
 static char _ALIGN(4) HAL_eeprom_data[HAL_EEPROM_SIZE];
 
 #if ENABLED(SDSUPPORT)
 
     SdFile file, root = card.getroot();
     if (!file.open(&root, EEPROM_FILENAME, O_RDONLY))
-      return false;
+      return true;
 
-    int16_t bytes_read = file.read(HAL_eeprom_data, HAL_STM32F4_EEPROM_SIZE);
+    int bytes_read = file.read(HAL_eeprom_data, HAL_EEPROM_SIZE);
     if (bytes_read < 0) return false;
-    for (; bytes_read < HAL_STM32F4_EEPROM_SIZE; bytes_read++)
+    for (; bytes_read < HAL_EEPROM_SIZE; bytes_read++)
       HAL_eeprom_data[bytes_read] = 0xFF;
     file.close();
     return true;
     if (!card.isDetected()) return false;
 
     SdFile file, root = card.getroot();
-    int16_t bytes_written = 0;
+    int bytes_written = 0;
     if (file.open(&root, EEPROM_FILENAME, O_CREAT | O_WRITE | O_TRUNC)) {
-      bytes_written = file.write(HAL_eeprom_data, HAL_STM32F4_EEPROM_SIZE);
+      bytes_written = file.write(HAL_eeprom_data, HAL_EEPROM_SIZE);
       file.close();
     }
-    return (bytes_written == HAL_STM32F4_EEPROM_SIZE);
+    return (bytes_written == HAL_EEPROM_SIZE);
   }
 
 #else // !SDSUPPORT
 
-  #error "Please define SPI_EEPROM (in Configuration.h) or disable EEPROM_SETTINGS."
+  #error "Please define an EEPROM, a SDCARD or disable EEPROM_SETTINGS."
 
 #endif // !SDSUPPORT
 
   return false;
 }
 
-size_t PersistentStore::capacity() { return HAL_STM32F4_EEPROM_SIZE; }
+size_t PersistentStore::capacity() { return HAL_EEPROM_SIZE; }
 
 #endif // EEPROM_SETTINGS
-#endif // __STM32F4__
+#endif // STM32