Implement HAL and apply macros across code-base

Implement AVR Platform

Marlin/src/HAL/HAL_AVR/persistent_store.cpp

@@ -0,0 +1,57 @@
+#include "../persistent_store_api.h"
+
+#include "../../../types.h"
+#include "../../../language.h"
+#include "../../../serial.h"
+#include "../../../utility.h"
+
+#ifdef ARDUINO_ARCH_AVR
+#if ENABLED(EEPROM_SETTINGS)
+
+namespace HAL {
+namespace PersistentStore {
+
+bool access_start() {
+  return true;
+}
+
+bool access_finish(){
+  return true;
+}
+
+bool write_data(int &pos, const uint8_t *value, uint16_t size, uint16_t *crc) {
+  while (size--) {
+    uint8_t * const p = (uint8_t * const)pos;
+    uint8_t v = *value;
+    // EEPROM has only ~100,000 write cycles,
+    // so only write bytes that have changed!
+    if (v != eeprom_read_byte(p)) {
+      eeprom_write_byte(p, v);
+      if (eeprom_read_byte(p) != v) {
+        SERIAL_ECHO_START();
+        SERIAL_ECHOLNPGM(MSG_ERR_EEPROM_WRITE);
+        return false;
+      }
+    }
+    crc16(crc, &v, 1);
+    pos++;
+    value++;
+  };
+  return true;
+}
+
+void read_data(int &pos, uint8_t* value, uint16_t size, uint16_t *crc) {
+  do {
+    uint8_t c = eeprom_read_byte((unsigned char*)pos);
+    *value = c;
+    crc16(crc, &c, 1);
+    pos++;
+    value++;
+  } while (--size);
+}
+
+}
+}
+
+#endif // EEPROM_SETTINGS
+#endif // ARDUINO_ARCH_AVR