Thank you all for the help i have done the program as suggested and it works fine.
I have another query, hope to get assistance.

In my fingerprint module, for varoius functions to be initiated like user registration, fingerprint capture etc.., i need to send a command packet on the serial port which is 11 byte data.

So what i do is i enable the TX bit and send this data continuosly in an while loop( i hope i am doing correctly?).

Now in response i receive an acknowlegment packet from the module which is again a 11 byte data(what this data should be for no error is already known to me), my problem is i have to compare this 11 byte data with the standard one, so how do i do this?
Should i save it in an array and then compare each entry, or can it be done continuosly like receive one byte and compare??

Hope i have explained my problem correctly!!
thanks in advance