Fix EEPROM get/put and add example.

Former-commit-id: 08aad7b

Author: h2zero

libraries/EEPROM/examples/bootcount.cpp

@@ -0,0 +1,31 @@
+/*
+ * n-able EEPROM demo
+*/
+#include <Arduino.h>
+#include <EEPROM.h>
+
+void setup() {
+    Serial.begin(115200);
+    EEPROM.begin();
+
+    uint32_t item = 0;
+    uint32_t count = 0;
+
+    Serial.println("EEPROM Demo started, press a key to see the bootcount.");
+
+    // wait for user input
+    while(!Serial.available()) {
+      delay(10);
+    }
+
+    EEPROM.get(item, count);
+    Serial.printf("Bootcount = %u\n", count);
+
+    count++;
+    EEPROM.put(item, count);
+
+    systemRestart();
+}
+
+void loop() {
+}

libraries/EEPROM/src/EEPROM.h

@@ -85,15 +85,15 @@ class EEPROMClass {
     //Functionality to 'get' and 'put' objects to and from EEPROM.
     template< typename T > T &get( int id, T &t ){
         static_assert(std::is_trivially_copyable<T>::value,"You can not use this type with EEPROM.get" ); // the code below only makes sense if you can "memcpy" T
-        _store.read(id, (uint8_t*)t, sizeof(T));
+        _store.read(id, (uint8_t*)&t, sizeof(T));
         return t;
     }
 
     template< typename T > const T &put( int id, const T &t ){
         static_assert(std::is_trivially_copyable<T>::value, "You can not use this type with EEPROM.put"); // the code below only makes sense if you can "memcpy" T
-        if(!_store.write(id, (uint8_t*)t, sizeof(T))) {
+        if(!_store.write(id, (uint8_t*)&t, sizeof(T))) {
             _store.defrag();
-            _store.write(id, (uint8_t*)t, sizeof(T));
+            _store.write(id, (uint8_t*)&t, sizeof(T));
         }
         return t;
     }