Serial receive issue on ds33EP256MU810 microcontroller.

[mohansaini]

Hi all

I am receiving 116 bytes of data on serial port the packet format is fixed as i am receiving Byte0 and Byte1 as '<' and at Byte114 and Byte115
as '>' just to check thet i am receiving a right packet. for that purpose i have written the ISR as

 void __attribute__ ((interrupt,no_auto_psv)) _U1RXInterrupt (void)
 {
	 static unsigned char count1=0;
	 unsigned char data;
	 data=U1RXREG;
     CalData[count1]=data;
     count1++;
    if((CalData[0]=='<')||(CalData[1]=='<'))        //&&(CalData[114]=='>')&&(CalData[115]=='>'))//we have received right packet now set the flag
        {
         //  CalData[count1++]=data;
             if(((CalData[114]=='>')&&(CalData[115]=='>'))&&(count1>=116))
                {
                 Rxr_Flag=1;
                 count1=0;
                }//Received complete packet 
	     //		else
         //      {
         //        count1=0;   
         //      } //There is something wrong with at the end of the packet
         }			
     else
       {
       count1=0;          //There is some missmatch with thwe data. 
       } 
                                                      
	 IFS0bits.U1RXIF=0;
 }

Now the problem is that if any time length of data is not 116 and Byte0 and Byte1 are '<' the variable count1 will not become 0 so that data will be lost in the next attempt as well.
Please help me out what can i do to make it a very generif function so that it will check the length as well.