// Functions for i2c communication
#include <avr/io.h>
#include "pinDefines.h"

void initI2C(void);
    /* Sets pullups and initializes bus speed to 100kHz (at FCPU=8MHz) */

void i2cWaitForComplete(void);
                       /* Waits until the hardware sets the TWINT flag */

void i2cStart(void);
                               /* Sends a start condition (sets TWSTA) */
void i2cStop(void);
                                /* Sends a stop condition (sets TWSTO) */

void i2cSend(uint8_t data);
                   /* Loads data, sends it out, waiting for completion */

uint8_t i2cReadAck(void);
              /* Read in from slave, sending ACK when done (sets TWEA) */
uint8_t i2cReadNoAck(void);
              /* Read in from slave, sending NOACK when done (no TWEA) */