keil 4 串口接收什么就发送什么.协议为，ff xx xx xx 55.将校验如果数据串正确，将原数据反还给上位机。-keil4 serial port to receive what you send anything. agreement, ff xx xx xx 55. to check if the data string is correct, the original data back to the host computer anti.

如何基于STM32来驱动W5100S的芯片，例程含有： 1,ARP&PING 2,DHCP 3,DNS 4,FTP_Client 5,HTTP_Server 6,IPRAW 7,MACRAW 8,NTP 9,PHYPoerDown 10,SNMP 11,TCPC 12,TCPS 13,TFTP_Client 14,UDP 15,UDP -Multicast 16,WOL(How to use the Ethernet chip,such as W5100S, 1,ARP&PING