UM0248

Webserver demo with uIP TCP/IP stack

23/26

3

Webserver demo with uIP TCP/IP stack

3.1

uIP overview

uIP is a free TCP-IP stack designed originally for 8-bit/16-bit microcontrollers, it needs only a

few kilobytes of RAM and less than 100 Kbytes for code.

The uIP stack provides support for several applications like web server and client applica-

tions, ICMP , telnet,...

For more details about the uIP stack please refer to: www.sics.se/~adam/uip/

3.2

ENET driver interfacing with the uIP stack

The webserver demo in the uIP stack is based on a main loop as shown in Figure 3.

Figure 3.

uIP main loop

In order to interface with the uIP stack, you just need to provide driver functions to receive

and send IP packets.

The driver functions used here are:

●

ENET_HandleTxPkt : sends an IP packet.

●

ENET_HandleRxPkt: checks for a received packet and copies it to the stack buffer.

For implementation details please refer to uIP stack file: uIPMain.c file

Check for timeout

Check for packet

Process packet

Application

Output packets

Output packets

Application

AProcess timeout

ENET_HandleTxPkt

ENET_HandleRxPkt