com.h

讲解了串口通讯的几个实例

#ifndef COM_H
#define COM_H

#include <dos.h>//#include "nvgt.h"

#if !defined(_WIN32)

#define COM1    		0
#define COM2    		1

#define COM1_INT_NO     0x0C
#define COM2_INT_NO     0x0B

#define COM1_INT_MASK   0x10
#define COM2_INT_MASK   0x08

#define COM1_BASE_ADRR  0x3f0
#define COM2_BASE_ADRR  0x2f0

#define COM_THR         0x08
#define COM_RHR         0x08
#define COM_LSB         0x08
#define COM_MSB         0x09
#define COM_IER         0x09
#define COM_IIR         0x0A
#define COM_LCR         0x0B
#define COM_MCR         0x0C
#define COM_LSR         0x0D
#define COM_MSR         0x0E

#define BAUD_300        0x0180
#define BAUD_600        0x00C0
#define BAUD_1200       0x0060
#define BAUD_2400       0x0030
#define BAUD_3600       0x0020
#define BAUD_4800       0x0018
#define BAUD_7200       0x0010
#define BAUD_9600       0x000C
#define BAUD_14400      0x0008
#define BAUD_19200      0x0006
#define BAUD_28800      0x0004
#define BAUD_38400      0x0003
#define BAUD_57600      0x0002
#define BAUD_115200     0x0001

 /* ///////////////////////////// LCR */
#define DLAB        	0x80
#define BREAK       	0x40

#define PARITY_NO       0x00
#define PARITY_ODD      0x08
#define PARITY_EVEN     0x18
#define PARITY_1        0x28
#define PARITY_0        0x38

#define STOP_BIT1       0x00
#define STOP_BIT2       0x04

#define DATA_BIT5       0x00
#define DATA_BIT6       0x01
#define DATA_BIT7       0x02
#define DATA_BIT8       0x03
/* ///////////////////////////// IER */ 
#define INT_MSK_MODEM   0x08
#define INT_MSK_ERR     0x04
#define INT_MSK_TX      0x02
#define INT_MSK_RX      0x01
 /* ///////////////////////////// IIR */
#define INT_SCR_NO      0x01
#define INT_SCR_ERR     0x06
#define INT_SCR_RX      0x04
#define INT_SCR_TX      0x02
#define INT_SCR_MODEM   0x00

extern int com1TX, com2TX, com1RX, com2RX, com1TXBusy, com2TXBusy;

/*  the folloing function is not alwayse needed to user */
#define WriteCOM1(c)    outportb(COM1_BASE_ADRR+COM_THR, (c))
#define ReadCOM1()      inportb(COM1_BASE_ADRR+COM_RHR)
#define WriteCOM2(c)    outportb(COM2_BASE_ADRR+COM_THR, (c))
#define ReadCOM2()      inportb(COM2_BASE_ADRR+COM_RHR)
void BaudRate(int comPort, int baud);   /*  comPort=0 for COM1, comPort=1 for COM2,  */
void DataFormat(int comPort, unsigned char format);
void InterruptType(int comPort, unsigned char intType);
void interrupt ( *MountISR(int comPort, void interrupt (*pNew)(void)) );
void interrupt COM1ISR(void);
void interrupt COM2ISR(void);
/*  user call the following two functions to initialize COM or close COM */
void OpenCOM(int comPort, int baud, unsigned char format, unsigned char intType);
void CloseCOM(int comPort);
void StartSend(int comPort, unsigned char comTransBuf[], int lenBuf);

/*  user must program the following two functions in file 'COMUser.C' */
void COM1RX(unsigned char c);
void COM2RX(unsigned char c);


#endif /* _WIN32 */

#define EX_INV 0

char*       i2s(short int i, char s[]);
char*       l2s(long l, char s[]);
char*       f2s(float f, char s[]);
char*       d2s(double d, char s[]);
short int   s2i(char s[]);
long        s2l(char s[]);
float       s2f(char s[]);
double      s2d(char s[]);
unsigned char CheckSum(unsigned char data[], int length);
unsigned int CheckSum1 (unsigned char data[], int length, unsigned char sum);
unsigned short CRC16(unsigned char *frame, int frameLen);
char* str2frm(char *str, char *frm, int len);
char* frm2str(char *frm, char *str, int len);

#endif /* COM_H */