uart.h

keil c51开发的8279和51单片机通用键盘控制和Led显示及uart通信程序。

#define LenBuf 0x10
#define START_PT &uart_buff[0]
#define END_PT   &uart_buff[LenBuf]
extern data unsigned char TIflag;
extern data unsigned char time_u;
extern data unsigned char *head_pt; 		    //接受头指针
extern data unsigned char *tail_pt;		   		//接受尾指针
extern data unsigned char uart_buff[LenBuf];	//接受缓冲区
extern idata unsigned char TxBuf[LenBuf];   	//发缓冲区实体
extern idata unsigned char *inTxBuf,*outTxBuf;	//发送缓冲区读写指针