add eeprom library explicitly

digistump-avr/libraries/EEPROM/examples/eeprom_iteration/eeprom_iteration.ino

@@ -0,0 +1,57 @@
+/***
+    eeprom_iteration example.
+    
+    A set of example snippets highlighting the
+    simplest methods for traversing the EEPROM.
+    
+    Running this sketch is not necessary, this is 
+    simply highlighting certain programming methods.
+    
+    Written by Christopher Andrews 2015
+    Released under MIT licence.
+***/
+
+#include <EEPROM.h>
+
+void setup() {
+
+  /***
+    Iterate the EEPROM using a for loop.
+  ***/
+  
+  for( int index = 0 ; index < EEPROM.length() ; index++ ){
+
+    //Add one to each cell in the EEPROM
+    EEPROM[ index ] += 1;
+  }
+  
+  /***
+    Iterate the EEPROM using a while loop.
+  ***/
+  
+  int index = 0;
+  
+  while( index < EEPROM.length() ){
+  
+    //Add one to each cell in the EEPROM
+    EEPROM[ index ] += 1;  
+    index++;
+  }
+  
+  /***
+    Iterate the EEPROM using a do-while loop.
+  ***/
+  
+  int idx = 0;  //Used 'idx' to avoid name conflict with 'index' above.
+  
+  do{
+  
+    //Add one to each cell in the EEPROM
+    EEPROM[ idx ] += 1;  
+    idx++;
+  }while( idx < EEPROM.length() );
+  
+  
+} //End of setup function.
+
+void loop(){}