// Status code for the SMBus
// (SMB0STA register)
switch (SMB0STA)
{
// Master Transmitter/Receiver:

case SMB_START_08:
 SMB0DAT = EPROM_DEVICE_ID;           
 SMB0DAT &= 0xFE;              
 // Load R/W bit                           
 SMB0DAT |= SMB_RW;            
 STA = 0;   
 // Manually clear STA bit
 i = 0;                        
break;

// Master Transmitter/Receiver: 
// Repeated START condition 
case SMB_RP_START_10:
 SMB0DAT = EPROM_DEVICE_ID;             .
 SMB0DAT |= SMB_RW;            
 STA = 0;                      
 i = 0;                    
break;

// Master Transmitter: Slave address
// + WRITE transmitted.
// ACK received.
case SMB_MTADDACK_18:
// Hi addr has been send, 
// Flag it, to send low byte 
 addrLowSendFlag = 1;		 
 SMB0DAT = CHAR_ADDR_HIGH;

if (SMB_RANDOMREAD)
{
 //Send a START after
 //the next ACK cycle
 SEND_START = 1;             
 SMB_RW = READ;
}
break;

///-RANSMIT ROUTINES ///

///------------------///
// Master Transmitter: Slave 
// address + WRITE transmitted.  NACK received.
case SMB_MTADDNACK_20:
 if(SMB_ACKPOLL)
 {
	// Restart transfer
	STA = 1;                  
 }
 else
 {  // Indicate failed transfer
	FAIL = 1;                  
 }                           
 break;

// Master Transmitter: Data byte 
// transmitted.  ACK received.
case SMB_MTDB_ACK_28:

// Has the Addr Hi byte been 
// sent, if Yes, send the 
//low byte, Flag it
if (addrLowSendFlag)
{
 SMB0DAT = CHAR_ADDR_LOW;

 //Reset the flag to skip
 addrLowSendFlag = 0;
}
 else
{
 if (SEND_START)
 {
 STA = 1;
 SEND_START = 0;
 break;
}

// Is this transfer a WRITE?
if (SMB_RW==WRITE)            
{

 // Is there data to send?
if (i < SMB_DATA_LEN)      
{
 SMB0DAT = SMB_SINGLEBYTE_OUT; 
 i++;
 }
 else
 {
// Set STO to terminte transfer
  STO = 1;  
  // Clear software busy flag
  SMB_BUSY = 0;          
 }
}
else {}                      
// If this transfer is a READ, then
// take no action, as a repeated
// start will be generated for the
// read operation

}
break;

// Master Transmitter: Data
//byte transmitted.NACK received.
case SMB_MTDB_NACK_30:
if(SMB_ACKPOLL)
{
 STA = 1;// Restart transfer
}
 else
{
FAIL = 1;// Indicate failed transfer
}    

break;

// Master Transmitter: Arbitration lost.
case SMB_MTARBLOST_38:

FAIL = 1; // Indicate failed transfer
          // and handle at end of ISR

break;