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COMM-DRV/Lib optimizes its transmissions and receptions in a background thread. It may buffer several byte/packet operations before they are actually outputted. To get around this you can replace the above functions with functions similar to the following.

//************************************
FastPutByte(int Port,char ch)
{
int Status;

Status=PutByte(Port,ch);
ser_rs232_putpacket(Port,0,(unsigned char *)0);
return(Status);
}

//************************************
FastPutPacket(int Port,int Len,char *ch)
{
int Status;

Status=PutPacket(Port,Len,ch);
ser_rs232_putpacket(Port,0,(unsigned char *)0);
return(Status);
}

//************************************
FastPutString(int Port,char *ch)
{
int Status;

Status=PutString(Port,ch);
ser_rs232_putpacket(Port,0,(unsigned char *)0);
return(Status);
}


//************************************
FastGetByte(int Port)
{
ser_rs232_getpacket(Port,0,(unsigned char *)0);
return(GetByte(Port));
}

//************************************
FastGetPacket(int Port,int Len,char *ch)
{
ser_rs232_getpacket(Port,0,(unsigned char *)0);
return(GetPacket(Port,Len,ch));
}

//************************************
FastGetString(int Port,int Len,char *ch)
{
ser_rs232_getpacket(Port,0,(unsigned char *)0);
return(GetString(Port,Len,ch));
}