Hi,
I am designing communication architecture between two processors for my
hobby project and they communicate using Serial Port with no buffers and
so the code should process one byte at a time.
The processors communicate using a pre-defined packet structure. For
example it will have a start packet byte, end packet byte, sequence
number, command, command parameters of length 'n' and CRC.
I have written some code to process the packets and it is working fine.
But it is not robust enough. Let's say if half of the packet is lost and
the next packet started after that, it will lose the next packet e.t.c.

Is there any algorithm for command processing. I guess network
processors use these a lot. I would be really grateful if someone can me
to the resources about sequential processing of network packets
preferably with examples.

I am uisng Stellaris LM3S processor and programming using C.