Added AVR support

Author: helmut64

src/SSD1306Wire.h

@@ -34,6 +34,11 @@
 #include "OLEDDisplay.h"
 #include <Wire.h>
 
+#ifdef ARDUINO_ARCH_AVR
+#define _min	min
+#define _max	max
+#endif
+
 class SSD1306Wire : public OLEDDisplay {
   private:
       uint8_t             _address;
@@ -51,7 +56,11 @@ class SSD1306Wire : public OLEDDisplay {
     }
 
     bool connect() {
+#ifdef ARDUINO_ARCH_AVR 
+      Wire.begin();
+#else
       Wire.begin(this->_sda, this->_scl);
+#endif
       // Let's use ~700khz if ESP8266 is in 160Mhz mode
       // this will be limited to ~400khz if the ESP8266 in 80Mhz mode.
       Wire.setClock(700000);
@@ -166,7 +175,11 @@ class SSD1306Wire : public OLEDDisplay {
 
     void initI2cIfNeccesary() {
       if (_doI2cAutoInit) {
-        Wire.begin(this->_sda, this->_scl);
+#ifdef ARDUINO_ARCH_AVR 
+      	Wire.begin();
+#else
+      	Wire.begin(this->_sda, this->_scl);
+#endif
       }
     }