c語言串口通信范例

1、一個c語言的串口通信程序范例(2010-04-02 15:19:47 轉載標簽： c語言串口通信通信程序it分類： 技術筆記 最近接觸一個項目，用HL-C1C激光位移傳感器+易控組態(tài)軟件完成生產(chǎn)線高度跳變檢測，好久沒有接觸c c#，一些資料，找來做個記錄，也許大家用的著#include #include #include #include #define COM232  0x2f8#define COMINT  0x0b#define MaxBufLen      500#define Port8259  

2、;     0x20#define EofInt        0x20static int  comportaddr;static char intvectnum;static unsigned char maskb;static unsigned char BufferMaxBufLen;static int  CharsInBuf,CircIn,CircOut;static void (interrupt far *OldAsyncInt(;static vo

3、id interrupt far AsyncInt(void;void Init_COM(int ComPortAddr, unsigned char IntVectNum, int Baud,       unsigned char Data, unsigned char Stop, unsigned char Parity unsigned char High,Low; int f; comportaddr=ComPortAddr; intvectnum=IntVectNum; C

4、harsInBuf=0;CircIn=0;CircOut=0;  f=(Baud/100; f=1152/f; High=f/256; Low=f-High*256; outp(ComPortAddr+3,0x80; outp(ComPortAddr,Low; outp(ComPortAddr+1,High;  Data=(Data-5|(Stop-1*4; if(Parity=2 Data=Data|0x18; else if(Parity=1 Data=Data|0x8; 

5、;outp(ComPortAddr+3,Data;  outp(ComPortAddr+4,0x0a;  outp(ComPortAddr+1,0x01;  disable(; OldAsyncInt=getvect( IntVectNum ; setvect( IntVectNum, AsyncInt ; enable(;  maskb=inp(Port8259+1; if(IntVectNum=0x0coutp(Port8259+1,maskb&0xef;

6、0;else outp(Port8259+1,maskb&0xf7;              static void interrupt far AsyncInt(void disable(; if(CharsInBuf   BufferCircIn=inp(comportaddr;  if(CircIn  else CircIn=0;  if(CircIn=CircOut CircOu

7、t+;  else CharsInBuf+;  enable(;  outp(Port8259,EofInt; void Restore(void setvect(intvectnum,OldAsyncInt; outp(Port8259+1,maskb; int GetCharInBuf(unsigned char *Char int Flag; Flag=-1; if(CharsInBuf>0     (*Char=BufferCircOut;  

8、; if(CircOut    else CircOut=0;    CharsInBuf-;    Flag=0;      return Flag; int SendChar(unsigned char Char if(inp(comportaddr+5&0x20=0 return -1; outp(comportaddr,Char; return 0;main( int i,c; unsigned char InChar; Init

9、_COM(COM232,COMINT,1200,8,1,0; while(1     if(kbhit(     if(InChar=getch(=27break;      else while(SendChar(InChar;        if(GetCharInBuf(&InChar=0       printf("%c&

10、quot;,InChar; Restore(; 接收程序：#include #include #include #include #include #include #define RXD 0 /接收#define TXD 0 /發(fā)送#define LSB 0 /波特率調(diào)節(jié)低8位#define MSB 1 /波特率調(diào)節(jié)高8位#define IER 1 / 中斷起用寄存器#define IIR 2 /中斷標識寄存器#define LCR 3 /線路控制寄存器#define MCR 4 /調(diào)制解調(diào)器控制寄存器#define LSR 5 /線路狀態(tài)寄存器#define MSR 6

11、 /調(diào)制解調(diào)器狀態(tài)寄存器#define IERV 1#define OUT2 0x08#define ERTS 2#define EDTR 1#define EMPTY 0X20#define READY 0X30#define ICREG 0X20#define IMASKREG 0X21#define EOI 0X20#define WAITCOUNT 5000#define BUFFLEN 2048 /用于存儲字符的數(shù)組的界#define ALTE 0X12#define ALTQ 0X10#define SER_BAUD_1200 96  #define SER_BAUD_2

12、400 48#define SER_BAUD_9600 0x0C#define SER_BAUD_19200 6#define SER_STOP_1 0 /*/ 1 stop bit per character*/#define SER_STOP_2 4 /*/ 2 stop bits per character*/#define SER_BITS_5 0 /*/ send 5 bit characters*/#define SER_BITS_6 1 /*/ send 6 bit characters*/#define SER_BITS_7 2 /*/ send 7 bit character

13、s*/#define SER_BITS_8 3 /*/ send 8 bit characters*/#define SER_PARITY_NONE 0 /*/ no parity*/#define SER_PARITY_ODD 8 /*/ odd parity*/#define SER_PARITY_EVEN 24 /*/ even parity*/int port;int ComNum;unsigned portaddr;unsigned portf;unsigned int baudtable=0x180,0xc0,0x60,0x30,0x18,0x0c,0x06;unsigned ch

14、ar paritytable=0x08,0x18,0x00,0x28,0x38;unsigned char bufferBUFFLEN;/recv bufint buffin=0;int buffout=0;int incount=0;int outcount=0;void interrupt(*vect_com(.;void putb(unsigned char ch/write a char to the recvbuf 將中斷得到的數(shù)據(jù)寫到緩沖區(qū)int temp;temp=buffin;if(+buffin=BUFFLEN buffin=0;if(buffin!=buffout buff

15、erbuffin=ch; / printf("bufferin%d=%c",bufferbuffin; / getch(; else buffin=temp;unsigned char getb(/read a char from the recvbufif(buffout!=buffin if(+buffout=BUFFLEN buffout=0; /printf("bufferout%d=%c",buffout,bufferbuffout; return(bufferbuffout; else return(0xff;/*unsigned char

16、sender( unsigned char choutportb(portaddr2+TXD,ch;printf("nsender outportdata=%cn",ch;outcount+;return(1;*/void interrupt receiver(.unsigned char ch;ch=inportb(portaddr+RXD;putb(ch;incount+; /記錄接收了多少個數(shù)據(jù)。outportb(ICREG,EOI;void SerInit(int baud,int configurationdisable(;outportb(portaddr+LC

17、R,0x80;outportb(portaddr+LSB,baud;outportb(portaddr+MSB,0x00;outportb(portaddr+LCR,configuration;enable(;void SerOpen(voidvect_com=getvect(portf+8;disable(;inportb(portaddr+RXD;inportb(portaddr+MSR;inportb(portaddr+LSR;inportb(portaddr+IIR;outportb(portaddr+IER,IERV;outportb(portaddr+MCR,OUT2|ERTS|E

18、DTR;outportb(IMASKREG,inportb(IMASKREG&(1< setvect(portf+8,receiver; enable(; ; void SerClose(void disable(; outportb(portaddr+IER,0; outportb(portaddr+MCR,0; outportb(IMASKREG,inportb(IMASKREG|(1< enable(; setvect(portf+8,vect_com; ; void Getportaddr(int port switch (port case 0: portaddr

19、=0x3F8; break; case 1: portaddr=0x2F8; break; case 2: portaddr=0x3E8; break; case 3: portaddr=0x2E8; break; portf=(port=0?4:3; ; void Int( unsigned char key,key2; port=ComNum-1; if(peek(0x40,port*2=0 printf("have no special com .n" exit(1; else printf("The used port is :COM%dn",C

20、omNum; ; Getportaddr(port; / 得到串口地址 SerInit(SER_BAUD_9600,SER_PARITY_EVEN| SER_BITS_8 | SER_STOP_1; / 初始化串口，設置波特率等 SerOpen(; do if(kbhit( key2=getch(; if(key2=27 break; ; key=getb(; if(key!=0xff printf("%xt",key; FILE *fp; fp=fopen("C:Receivedata.dat","ab" / 可選擇接收數(shù)據(jù)的存放文

21、件路徑和文件名 if(fp=NULL printf("File open error!" / fputc(key,fp; fwrite(&key,sizeof(unsigned char,1,fp; fclose(fp; while (key2!=27; SerClose(; / printf("%d char has been receivedn",incount; / printf("%d char has been sendedn",outcount; / printf("nsum=%d n",sum

22、; void main(/com1 receive printf("Please input the receive COMnum:(14n" cin>>ComNum; printf("the current com set is:9600,even, data bits 8, stop 1," Int(; printf("nnOVERn" exit(0; ; 發(fā)送文件程序 #include #include #include #include #include #include #ifdef _cplusplus #de

23、fine _CPPARGS . #else #define _CPPARGS #endif #define SER_RBF 0  #define SER_THR 0  #define SER_IER 1  #define SER_IIR 2  #define SER_LCR 3  #define SER_MCR 4  #define SER_LSR 5  #define SER_MSR 6  #define SER_DLL 0  #define SER_DLH 1  #define SER_BA

24、UD_1200 96  #define SER_BAUD_2400 48 #define SER_BAUD_9600 12 #define SER_BAUD_19200 6 #define SER_GP02 8  #define COM_1 0x3F8  #define COM_2 0x2F8 /*/ base port address of port 1*/ #define COM_3 0x3E8 #define COM_4 0x2E8 #define SER_STOP_1 0 /*/ 1 stop bit per character*/ #define SER

25、_STOP_2 4 /*/ 2 stop bits per character*/ #define SER_BITS_5 0 /*/ send 5 bit characters*/ #define SER_BITS_6 1 /*/ send 6 bit characters*/ #define SER_BITS_7 2 /*/ send 7 bit characters*/ #define SER_BITS_8 3 /*/ send 8 bit characters*/ #define SER_PARITY_NONE 0 /*/ no parity*/ #define SER_PARITY_O

26、DD 8 /*/ odd parity*/ #define SER_PARITY_EVEN 24 /*/ even parity*/ #define SER_DIV_LATCH_ON 128 /*/ used to turn reg 0,1 into divisor latch*/ #define PIC_IMR 0x21 /*/ pic's interrupt mask reg.*/ #define PIC_ICR 0x20 /*/ pic's interupt control reg.*/ #define INT_SER_PORT_0 0x0C /*/ port 0 int

27、errupt com 1 & 3*/ #define INT_SER_PORT_1 0x0B /*/ port 0 interrupt com 2 & 4*/ #define SERIAL_BUFF_SIZE 128 /*/ current size of circulating receive buffer*/ void interrupt far (*Old_Isr(_CPPARGS; /*/ holds old com port interrupt handler*/ char ser_bufferSERIAL_BUFF_SIZE; /*/ the receive buf

28、fer*/ int ser_end = -1,ser_start=-1; /*/ indexes into receive buffer*/ int ser_ch, char_ready=0; /*/ current character and ready flag*/ int old_int_mask; /*/ the old interrupt mask on the PIC*/ int open_port; /*/ the currently open port*/ int serial_lock = 0; /*/ serial ISR semaphore so the buffer*/

29、 /*/ isn't altered will it is being written*/ /*/ to by the ISR*/ /*- 寫串口 -*/  void interrupt far Serial_Isr(_CPPARGS serial_lock = 1; ser_ch = inp(open_port + SER_RBF; if (+ser_end > SERIAL_BUFF_SIZE-1 ser_end = 0; ser_bufferser_end = ser_ch; +char_ready; outp(PIC_ICR,0x20; serial_lock

30、= 0;   int Ready_Serial( return(char_ready;   /*- 讀串口 -*/ int Serial_Read( int ch; while(serial_lock if (ser_end != ser_start if (+ser_start > SERIAL_BUFF_SIZE-1 ser_start = 0; ch = ser_bufferser_start; printf("%x",ch; if (char_ready > 0 -char_ready; return(ch;   else

31、return(0;   /*- 寫串口 -*/ Serial_Write(char ch while(!(inp(open_port + SER_LSR & 0x20 asm cli outp(open_port + SER_THR, ch; asm sti /*- 初始化串口 -*/ Open_Serial(int port_base, int baud, int configuration open_port = port_base; disable(; outp(port_base + SER_LCR, SER_DIV_LATCH_ON; outp(port_base

32、+ SER_DLL, baud; outp(port_base + SER_DLH, 0; outp(port_base + SER_LCR, configuration; outp(port_base + SER_MCR, SER_GP02; outp(port_base + SER_IER, 1; if (port_base = COM_1 | port_base=COM_3 Old_Isr = _dos_getvect(INT_SER_PORT_0; _dos_setvect(INT_SER_PORT_0, Serial_Isr; printf("nOpening Commun

33、ications Channel Com Port #1/3.n" else Old_Isr = _dos_getvect(INT_SER_PORT_1; _dos_setvect(INT_SER_PORT_1, Serial_Isr; printf("nOpening Communications Channel Com Port #2/4.n" old_int_mask = inp(PIC_IMR; outp(PIC_IMR, (port_base=COM_1 ? (old_int_mask & 0xEF : (old_int_mask & 0

34、xF7 ; enable(; /*- 關閉串口 -*/ Close_Serial(int port_base outp(port_base + SER_MCR, 0; outp(port_base + SER_IER, 0; outp(PIC_IMR, old_int_mask ; if (port_base = COM_1 _dos_setvect(INT_SER_PORT_0, Old_Isr; printf("nClosing Communications Channel Com Port #1.n" else _dos_setvect(INT_SER_PORT_1,

35、 Old_Isr; printf("nClosing Communications Channel Com Port #2.n"   /*- 發(fā)送應用 -*/ void main(int argc,char *argv char ch,press; int done=0; FILE *fp; argc=2; /argv1="c:comfile.c" if(argc<2 printf("nUsage:display filename.wav!" / exit(1; if(fp=fopen(argv1,"r+b"=NULL printf("cannot open the filen" / exit(0; fseek(fp, 0, SEEK_SET; Open_S