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diff --git a/libraries/Wire/Wire.h b/libraries/Wire/Wire.h
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+/* *****************************************************************************
+ * The MIT License
+ *
+ * Copyright (c) 2010 LeafLabs LLC.
+ *
+ * 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.
+ * ****************************************************************************/
+
+/**
+ * @brief Wire library, ported from Arduino. Provides a lean
+ * interface to I2C (two-wire) communication.
+ */
+
+#include "wirish.h"
+
+#ifndef _WIRE_H_
+#define _WIRE_H_
+
+typedef struct {
+ uint8 scl;
+ uint8 sda;
+} Port;
+
+/* You must update the online docs if you change this value. */
+#define WIRE_BUFSIZ 32
+
+/* return codes from endTransmission() */
+#define SUCCESS 0 /* transmission was successful */
+#define EDATA 1 /* too much data */
+#define ENACKADDR 2 /* received nack on transmit of address */
+#define ENACKTRNS 3 /* received nack on transmit of data */
+#define EOTHER 4 /* other error */
+
+#define SDA 20
+#define SCL 21
+
+#define I2C_WRITE 0
+#define I2C_READ 1
+
+#define I2C_DELAY do{for(int i=0;i<50;i++) {asm volatile("nop");}}while(0)
+
+class TwoWire {
+ private:
+ uint8 rx_buf[WIRE_BUFSIZ]; /* receive buffer */
+ uint8 rx_buf_idx; /* first unread idx in rx_buf */
+ uint8 rx_buf_len; /* number of bytes read */
+
+ uint8 tx_addr; /* address transmitting to */
+ uint8 tx_buf[WIRE_BUFSIZ]; /* transmit buffer */
+ uint8 tx_buf_idx; /* next idx available in tx_buf, -1 overflow */
+ boolean tx_buf_overflow;
+ Port port;
+ uint8 writeOneByte(uint8);
+ uint8 readOneByte(uint8, uint8*);
+ public:
+ TwoWire();
+ void begin();
+ void begin(uint8, uint8);
+ void beginTransmission(uint8);
+ void beginTransmission(int);
+ uint8 endTransmission(void);
+ uint8 requestFrom(uint8, int);
+ uint8 requestFrom(int, int);
+ void send(uint8);
+ void send(uint8*, int);
+ void send(int);
+ void send(int*, int);
+ void send(char*);
+ uint8 available();
+ uint8 receive();
+};
+
+void i2c_start(Port port);
+void i2c_stop(Port port);
+boolean i2c_get_ack(Port port);
+void i2c_send_ack(Port port);
+void i2c_send_nack(Port port);
+uint8 i2c_shift_in(Port port);
+void i2c_shift_out(Port port, uint8 val);
+
+extern TwoWire Wire;
+
+#endif // _WIRE_H_