serint.h

串口是目前最常用的一种串行通讯接口它是在年由美国电子工业协会联合贝尔系统调制解调器厂家及计算机终端生产厂家共同制定的用于串行通讯的标准

#ifndef __serint_h_included__
#define	__serint_h_included__

unsigned char RR_iHead;
unsigned char RR_iTail;
unsigned char RR_cLev;
unsigned char RR_cMax;
unsigned char TR_iHead;
unsigned char TR_iTail;
unsigned char TR_cLev;
unsigned char TR_cMax;
unsigned char UnGotCh;
unsigned char SerFlags;
bit FlagTransIdle;
bit FlagStripOutLF;
bit FlagCvtInCR;
unsigned char TestBits;

#define INRINGSIZE 128
#define OUTRINGSIZE 250
#define T1RELOAD 253
#define CR 13
#define LF 10
#define ESC 27
#define EOF -1

unsigned char xdata RRing[INRINGSIZE];
unsigned char xdata TRing[OUTRINGSIZE];
extern void ptstr(const char *);
extern void ptch(int);
extern int ckch();
extern int gtch();
extern void SerWaitOutDone();
extern void SerFlushIn();
extern void ptc(int TransChar);

#endif