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+/*
+    MIT License
+
+    Copyright (c) 2016-2018, Alexey Dynda
+
+    Permission is hereby granted, free of charge, to any person obtaining a copy
+    of this software and associated documentation files (the "Software"), to deal
+    in the Software without restriction, including without limitation the rights
+    to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+    copies of the Software, and to permit persons to whom the Software is
+    furnished to do so, subject to the following conditions:
+
+    The above copyright notice and this permission notice shall be included in all
+    copies or substantial portions of the Software.
+
+    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+    AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+    OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+    SOFTWARE.
+*/
+
+/**
+ * @file ssd1306_i2c_conf.h SSD1306 library basic i2c definitions
+ */
+
+#ifndef _SSD1306_I2C_CONF_H_
+#define _SSD1306_I2C_CONF_H_
+
+#include "ssd1306_hal/io.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#ifndef SSD1306_SA
+    /**
+     * @ingroup LCD_HW_INTERFACE_API
+     *
+     * SSD1306_SA defines default i2c address of LCD display. Please, check your device.
+     * If you LCD device has different address, you can set different one via
+     * ssd1306_i2cInit_Wire() or ssd1306_i2cInit_Embedded() functions.
+     * Write command will be SSD1306_SA<<1 and read will be SSD1306_SA<<1 | 1
+     */
+    #define SSD1306_SA    0x3C  // Slave address
+#endif
+
+#if defined(__AVR_ATtiny25__) || defined(__AVR_ATtiny45__) || defined(__AVR_ATtiny85__)
+    #ifndef SSD1306_SCL
+        #define SSD1306_SCL   3 ///< SCL, Pin 3 on SSD1306 Board
+    #endif
+    #ifndef SSD1306_SDA
+        #define SSD1306_SDA   4 ///< SDA, Pin 4 on SSD1306 Board
+    #endif
+#elif defined(__AVR_ATtiny24__) || defined(__AVR_ATtiny44__) || defined(__AVR_ATtiny84__)
+    #ifndef SSD1306_SCL
+        #define SSD1306_SCL   4 ///< SCL, Pin 4 - physical pin 9 of Attiny84
+    #endif
+    #ifndef SSD1306_SDA
+        #define SSD1306_SDA   6 ///< SDA, Pin 6 - physical pin 7 of Attiny84
+    #endif
+#else
+    #ifndef SSD1306_SCL
+        #define SSD1306_SCL   5 // SCL, Pin A5 on SSD1306 Board
+    #endif
+    #ifndef SSD1306_SDA
+        #define SSD1306_SDA   4 // SDA, Pin A4 on SSD1306 Board
+    #endif
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif