Add micro build

src/platforms/micro/lib/I2C/I2C.h

@@ -0,0 +1,15 @@
+#ifndef I2C_H
+#define I2C_H
+
+#include <stdint.h>
+
+#define TWI_FREQ 400000UL // 400 kHz
+
+void i2c_init(void);
+uint8_t i2c_start(uint8_t address);
+void i2c_stop(void);
+uint8_t i2c_write(uint8_t data);
+uint8_t i2c_read_ack(void);
+uint8_t i2c_read_nack(void);
+
+#endif