TCP/IP协议芯片W5100，驱动代码，可集成到各种嵌入式平台，支持SPI和并口两种接口-TCP/IP protocol chip W5100, driver code, can be integrated into a variety of embedded platforms to support both SPI and parallel interfaces

this code shows how to use the ENC28J60 mini library : * the board will reply to ARP & ICMP echo requests * the board will reply to UDP requests on any port : * returns the request in upper char with a header made of remote host IP & port nu