Firmware

AN2282

14/19

Figure 8.

uIP main control loop

For more details on TCP/IP stack application program interfaces refer to the uIP Reference

Manual and to the available documentation and information from www.sics.se [6].

The stack is processed in the main loop in the main.c module; the execution is temporized

by using the alarm of the RTC. The stack execution time is one second by hooking the

TCP/IP processing function void TCP_IP_Stack( void ) to the RTC alarm interrupt

handler. After initialization the software waits five seconds before starting the cyclic

processing. Using this approach, the TCP/IP stack is processed independently of the rest of

the whole firmware, so the stack firmware can be considered as a module of a bigger

application.

Check for packet

Check for timeout

Process packet

Application events

Output packets

Process timeout

Application events

Output packets