working library with tests. Lacks error tracking.HEADmaster

1 files changed, 15 insertions, 2 deletions

diff --git a/m0EEPROM.h b/m0EEPROM.h
index 8f58942..870b7e6 100644
--- a/m0EEPROM.h
+++ b/m0EEPROM.h
@@ -1,11 +1,22 @@
 // m0EEPROM.h - definitions for 24LC256 EEPROM read and write for m0 SAMD21G18 and adafruit feather
+/*  The test code has a bunch of examples of usage.  
+*
+*   Note that when using multibyte reads or writes, both the SERIAL_BUFFER_SIZE and the PAGE_SIZE are 
+*   _assumed_ to be powers of 2.
+*/
 #ifndef M0EEPROM_H
 #define M0EEPROM_H
 
+#include "Wire.h"
+
 class eeprom {
     int _device_address; // chip address.  currently only supporting one
 public:
-    begin(device_address=0x50) : _device_address(device_address){}
+    void begin(int device_address=0x50)
+    {
+        _device_address = device_address;
+        Wire.begin();
+    }
 
     // read a byte from the specified address in eeprom memory
     uint8_t read_byte(uint16_t address);
@@ -22,7 +33,9 @@ public:
     //  write a structure of arbitrary size to memory at address.
     //  the size of the structure must be less than 64K-address.
     //  The structure is passed as a byte array.
-    void write_bytes(uint16_t address, uint8_t* data, uint16_t size);`
+    void write_bytes(uint16_t address, uint8_t* data, uint16_t size);
 };
 
+extern eeprom Eeprom;
+
 #endif // M0EEPROM_H