Added additional examples to EEPROM lib

1 files changed, 74 insertions, 0 deletions

diff --git a/libraries/EEPROM/examples/eeprom_pointer/eeprom_pointer.ino b/libraries/EEPROM/examples/eeprom_pointer/eeprom_pointer.ino
new file mode 100644
index 0000000..b56b681
--- /dev/null
+++ b/libraries/EEPROM/examples/eeprom_pointer/eeprom_pointer.ino
@@ -0,0 +1,74 @@
+/***
+    eeprom_pointer example.
+    
+    This example shows how the built-in EEPtr
+    object can be used to manipulate the EEPROM
+    using standard pointer arithmetic.
+    
+    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() {
+
+  Serial.begin(9600);
+
+  /***
+    In this example, we will iterate forward over the EEPROM,
+    starting at the 10th cell (remember indices are zero based).
+  ***/
+  
+  EEPtr ptr = 9;
+  
+  //Rather than hard coding a length, we can use the provided .length() function.
+
+  while( ptr < EEPROM.length() ){
+  
+    Serial.print( *ptr, HEX );  //Print out hex value of the EEPROM cell pointed to by 'ptr'
+    Serial.print( ", " );       //Separate values with a comma.
+    ptr++;                      //Move to next cell
+  }
+
+  /***
+    In this example, we will iterate backwards over the EEPROM,
+    starting at the last cell.
+  ***/
+  
+  ptr = EEPROM.length() - 1;
+  
+  do{
+    
+    Serial.print( *ptr, HEX );
+    Serial.print( ", " );
+    
+  }while( ptr-- ); //When the pointer reaches zero the loop will end as zero is considered 'false'.
+  
+  
+  /***
+    And just for clarity, the loop below is an equivalent implementation
+    of the C++11 ranged for loop.
+  ***/
+  
+  for( EEPtr ptr = EEPROM.begin() ; item != EEPROM.end() ; ++item ){
+    Serial.print( *ptr, HEX );
+    Serial.print( ", " );
+  }
+  
+  /*** 
+    The actual C++11 version:
+  
+    for( auto ptr : EEPROM ){
+      Serial.print( *ptr, HEX );
+      Serial.print( ", " );
+    }
+  ***/
+  
+
+}
+
+void loop(){}
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