i2c send data

unsigned char i2c_sendData(unsigned char data)

{

   TWDR = data; 

   TWCR = (1<<TWINT) |(1<<TWEN);     //Load SLA_W into TWDR Register. Clear TWINT bit

                           //in TWCR to start transmission of data

  while (!(TWCR & (1<<TWINT)));     //Wait for TWINT flag set. This indicates that the

                            //data has been transmitted, and

  //while((TWSR & 0xF8) != MT_DATA_ACK)                   //ACK/NACK has been received.

   if ((TWSR & 0xF8) != MT_DATA_ACK)   //Check value of TWI Status Register

       return(1);

  else

     return(0);

}