uart.h

RTL8019AS以太网控制器以寄存器（16K的RAM）为核心

#ifdef UART_GLOBALS
#define UART_EXT
#else
#define UART_EXT extern 
#endif
UART_EXT unsigned char Get_Char();

UART_EXT void Printf_Char(uchar ascii);

UART_EXT void Printf_String(uchar  *string);
UART_EXT void Printf_IPStr(union Ip_Address_Type ip);
UART_EXT void Printf_PortStr(unsigned int portnum);
UART_EXT void Printf_Hex(unsigned char senddata);