将AT91SAM7X256的三个USART口（两个USART口，和一个DBGU口）配置成三个USART口,Will USART I AT91SAM7X256 three (two USART mouth, and a mouth DBGU) configuration into three USART I

ARM7X256的网络ARP和ICMP的简单软件协议版(备注是IAR开发环境下)-ARM7X256 network ARP and ICMP simple version of the software agreement (Note that IAR development environment)