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/****************************************************************************

Call this function to send a prepared message. The first byte must contain the slave address and the

read/write bit. Consecutive bytes contain the data to be sent, or empty locations for data to be read

from the slave. Also include how many bytes that should be sent/read including the address byte.

The function will hold execution (loop) until the TWI_ISR has completed with the previous operation,

then initialize the next operation and return.

****************************************************************************/

void TWI_Start_Transceiver_With_Data( unsigned char *msg, unsigned char msgSize )

{

  unsigned char temp;

  while ( TWI_Transceiver_Busy() );             // Wait until TWI is ready for next transmission.

  TWI_msgSize = msgSize;                        // Number of data to transmit.

  TWI_buf[0]  = msg[0];                         // Store slave address with R/W setting.

  if (!( msg[0] & (TRUE<<TWI_READ_BIT) ))       // If it is a write operation, then also copy data.

  {

    for ( temp = 1; temp < msgSize; temp++ )

      TWI_buf[ temp ] = msg[ temp ];

  }

  TWI_statusReg.all = 0;      

  TWI_state         = TWI_NO_STATE ;

  TWCR = (1<<TWEN)|                             // TWI Interface enabled.

         (1<<TWIE)|(1<<TWINT)|                  // Enable TWI Interupt and clear the flag.

         (0<<TWEA)|(1<<TWSTA)|(0<<TWSTO)|       // Initiate a START condition.

         (0<<TWWC);                             //

}