c语言串口通信范例

1、叮叮小文库c 语言的串口通信程序范例标签： 分类： 技术笔记c 语言串口通信通信程序it最近接触一个项目，用 HL-C1C 激光位移传感器+易控组态软件完成生产线高度跳变检测，好久没有接触c c# ，一些资料，找来做个记录，也许大家用的着#include <stdio.h>#include <dos.h>#include <conio.h>#include <string.h>#define COM232 0x2f8#define COMINT 0x0b#define MaxBufLen500#define Port82590x20#define

2、 EofInt0x20static int comportaddr;static char intvectnum;static unsigned char maskb;static unsigned char BufferMaxBufLen;static int CharsInBuf,CircIn,CircOut;static void (interrupt far *OldAsyncInt)();static void interrupt far AsyncInt(void);void Init_COM(int ComPortAddr, unsigned char IntVectNum, i

3、nt Baud,unsigned char Data, unsigned char Stop, unsigned char Parity)unsigned char High,Low; int f;comportaddr=ComPortAddr;intvectnum=IntVectNum;Charsl nBuf=O;Circl n=0;CircOut=0;f=(Baud/100);f=1152/f; High=f/256;Low=f-High*256;outp(ComPortAdd 叶 3,0x80); outp(ComPortAddr,Low);outp(ComPortAdd r+1,Hig

4、h);Data=(Data-5)|(Stop-1)*4);if(Parity=2) Data=Data|0x18;else if(Parity=1) Data=Data|0x8;outp(ComPortAdd 叶 3,Data);outp(ComPortAdd 叶 4,0x0a);outp(ComPortAdd 叶 1,0x01);disable。；01dAs yncln t=getvect( In tVectNum );setvect( In tVectNum, Asynclnt );en able();maskb=i np(Port8259+1);if(I ntVectNum=0x0c)o

5、utp(Port8259+1,maskb&0 xef); else outp(Port8259+1,maskb&0 xf7);static void in terrupt far Asyn cI nt(void)disable。；if(CharsI nBufvMaxBufLe n)BufferCircI n=i np(comportaddr);if(CircIn<MaxBufLen-1) CircIn+;else Circln=0;if(CircI n=CircOut) CircOut+;else Chars In Buf+;en able();outp(Port8259

6、,Eofl nt); void Restore(void)setvect(i ntvect num ,OldAs yncln t); outp(Port8259+1,maskb);int GetCharl nBuf(u nsig ned char *Char)int Flag;Flag=-1;if(Charsl nBuf>0)(*Char尸BufferCircOut;if(CircOut<MaxBufLe n-1)CircOut+; else CircOut=0;CharsI nBuf-;Flag=0; return Flag;int Sen dChar( un sig ned c

7、har Char)if(inp(comportaddr+5)&0x20)=0) return -1; outp(comportaddr,Char); return 0;mai n()int i,c;un sig ned char In Char;In it_COM(COM232,COMINT,12OO,8,1,O);while(1)if(kbhit()if(I nChar=getch()=27)break; else while(Se ndChar(I nChar);if(GetCharl nBuf(&ln Char)=0) prin tf("%c",l n

8、Char);Restore。；接收程序:# in elude <dos.h># in elude <fstream.h># in elude <coni o.h># in elude <stdio.h># in elude <stdlib.h># in elude <math.h># define RXD 0 / 接收# define TXD 0 / 发送# define LSB 0 II波特率调节低 8位# define MSB 1 II波特率调节高 8位# define IER 1 II中断起用寄存器# define

9、IIR 2 II中断标识寄存器# define LCR 3 II线路控制寄存器# define MCR 4 II调制解调器控制寄存器# defi ne LSR 5 II线路状态寄存器# define MSR 6 II调制解调器状态寄存器#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 BU

10、FFLEN 2048 II 用于存储字符的数组的界#define ALTE 0X12#define ALTQ 0X10#define SER_BAUD_1200 96#define SER_BAUD_2400 48#define SER_BAUD_9600 0x0C#define SER_BAUD_19200 6#define SER_STOP_1 0 I*I 1 stop bit per eharaeter*I#define SER_STOP_2 4 I*I 2 stop bits per eharaeter*I#define SER_BITS_5 0 I*I send 5 bit ehar

11、aeters*I# defi ne SER_BITS_6 1 /*/ send 6 bit eharaeters*/# defi ne SER_BITS_7 2 /*/ send 7 bit eharaeters*/# defi ne SER_BITS_8 3 /*/ send 8 bit eharaeters*/# defi ne SER_PARITY_NONE 0 /*/ no parity*/# defi ne SER_PARITY_ODD 8 /*/ odd parity*/# defi ne SER_PARITY_EVEN 24 /*/ eve n parity*/ int port

12、;int ComNum;un sig ned portaddr;un sig ned portf;unsigned int baudtable尸0x180,0xc0,0x60,0x30,0x18,0x0c,0x06;unsigned char paritytable=0x08,0x18,0x00,0x28,0x38;un sig ned char bufferBUFFLEN;recv bufint buffin=0;int buffout=0;int incoun t=0;int outco un t=0;void in terrupt(*vect_com)();void putb(u nsi

13、g ned char ch)/write a char to the recvbuf将中断得到的数据写到缓冲区int temp;temp=buffi n;if(+buffi n=BUFFLEN)buffi n=0;if(buffi n!=buffout)bufferbuffi n=ch;/ prin tf("bufferi n%d=%c",bufferbuffi n);/ getch();elsebuffi n=temp;un sig ned char getb()/read a char from the recvbufif(buffout!=buffi n)if(+bu

14、ffout=BUFFLEN)buffout=0;/pri ntf("bufferout%d=%c",buffout,bufferbuffout);return(bufferbuffout);elsereturn(0xff);/*un sig ned char sen der( un sig ned char ch)outportb(portaddr2+TXD,ch);prin tf("nsen der outportdata=%c n",ch);outco un t+;return(1);*/void in terrupt receiver 。.)un

15、sig ned char ch;14ch=in portb(portaddr+RXD);putb(ch);incount+; 记录接收了多少个数据。outportb(ICREG,EOI);；void Serinit(int baud,int configuration)disable。；outportb(portaddr+LCR,0x80); outportb(portaddr+LSB,baud); outportb(portaddr+MSB,0x00);outportb(portaddr+LCR,c on figurati on);en able();void SerOpe n( void)

16、vect_com=getvect(portf+8);disable。；in portb(portaddr+RXD);in portb(portaddr+MSR);in portb(portaddr+LSR);in portb(portaddr+IIR);outportb(portaddr+IER,IERV); outportb(portaddr+MCR,OUT2|ERTS|EDTR);outportb(IMASKREG,i nportb(IMASKREG )&(1<<portf); setvect(portf+8,receiver);en able();void SerCl

17、ose(void)disable。；outportb(portaddr+IER,0);outportb(portaddr+MCR,0);outportb(IMASKREG,i nportb(IMASKREG)|(1<<portf);en able();setvect(portf+8,vect_com);；void Getportaddr(i nt port)switch (port)case 0: portaddr=0x3F8; break;case 1: portaddr=0x2F8; break;case 2: portaddr=0x3E8; break;case 3: por

18、taddr=0x2E8; break;portf=(port=0)?4:3;void Int()un sig ned char key,key2;port=ComNum-1;if(peek(0x40,port*2)=0) prin tf("have no special com .n");exit(1);else prin tf("The used port is :COM%dn",ComNum);Getportaddr(port); / 得至 U 串 口 地址Serinit(SER_BAUD_9600,SER_PARITY_EVEN| SER_BITS

19、_8 | SER_STOP_1); 初始化 串口，设置波特率等SerOpe n();do if(kbhit() key2=getch();if(key2=27) break;key=getb();if(key!=0xff) prin tf("%xt",key);FILE *fp;fp=fopen("C:Receivedata.dat","ab"); II可选择接收数据的存放文件路径和文件名if(fp=NULL)pri ntf("File ope n error!");II fputc(key,fp);fwrite(

20、&key,sizeof( un sig ned char),1,fp);fclose(fp);while (key2!=27);SerClose();II prin tf("%d char has bee n receivedn",i ncoun t);II prin tf("%d char has bee n sen dedn",outco un t);II prin tf("nsum=%d n",sum);void main() com1 receiveprin tf("Please in put the rec

21、eive COMn um:(14)n");cin> >ComNum;prin tf("the curre nt com set is:9600,eve n, data bits 8, stop 1,");In t()；prin tf("nnOVER'n");exit(0);发送文件程序#in clude <dos.h>#in clude <bios.h>#in clude <stdio.h>#in clude <math.h>#in clude <coni o.h>

22、#in clude <graphics.h> #ifdef _cplusplus#defi ne _CPPARGS .#else#defi ne _CPPARGS#en dif# defi ne SER_RBF 0# defi ne SER_THR 0# defi ne SER_IER 1# defi ne SER_IIR 2# defi ne SER_LCR 3# defi ne SER_MCR 4# defi ne SER_LSR 5# defi ne SER_MSR 6# defi ne SER_DLL 0#defi ne SER_DLH 1#defi ne SER_BAUD

23、_1200 96#defi ne SER_BAUD_2400 48#defi ne SER_BAUD_9600 12#defi ne SER_BAUD_19200 6#defi ne SER_GP02 8#defi ne COM_1 0x3F8#defi ne C0M_2 0x2F8 /*/ base port address of port 1*/#defi ne COM_3 0x3E8#defi ne COM_4 0x2E8# defi ne SER_STOP_1 0 /*/ 1 stop bit per character*/# defi ne SER_STOP_2 4 /*/ 2 st

24、op bits per character*/# defi ne SER_BITS_5 0 /*/ send 5 bit characters*/# defi ne SER_BITS_6 1 /*/ send 6 bit characters*/# defi ne SER_BITS_7 2 /*/ send 7 bit characters*/# defi ne SER_BITS_8 3 /*/ send 8 bit characters*/# defi ne SER_PARITY_NONE 0 /*/ no parity*/# defi ne SER_PARITY_ODD 8 /*/ odd

25、 parity*/#defi ne SER_PARITY_EVEN 24 /*/ eve n parity*/#defi ne 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.*/#defi ne INT_SER_PORT_0 0x0C /*/ port 0 in terrupt com 1

26、 & 3*/#defi ne INT_SER_PORT_1 0x0B /*/ port 0 in terrupt com 2 & 4*/#defi ne SERIAL_BUFF_SIZE 128 /*/ curre nt size of circulat ing receive buffer*/ void in terrupt far (*Oldsr)( _CPPARGS); /*/ holds old com port in terrupt han dler*/ char ser_bufferSERIAL_BUFF_SIZE; /*/the receive buffer*/i

27、nt ser_e nd = -1,ser_start=-1; /*/ i ndexes into receive buffer*/int ser_ch, char_ready=0; /*/ curre nt character and ready flag*/int old_ in t_mask; /*/ the old in terrupt mask on the PIC*/int ope n_port; /*/ the curre ntly ope n port*/int serial_lock = 0; /*/ serial ISR semaphore so the buffer*/*/

28、 is n't altered will it is being writte n*/*/ to by the ISR*/*写串口 */void in terrupt far Serial_Isr(_CPPARGS)serial_lock = 1;ser_ch = in p(ope n_port + SER_RBF);if (+ser_e nd > SERIAL_BUFF_SIZE-1)ser_e nd = 0;ser_bufferser_e nd = ser_ch;+char_ready; outp(PIC_ICR,0x20);serial_lock = 0;int Ready

29、_Serial()retur n( char_ready);/*读串口 */int Serial_Read()int ch;while(serial_lock) if (ser_e nd != ser_start)if (+ser_start > SERIAL_BUFF_SIZE-1)ser_start = 0;ch = ser_bufferser_start;prin tf("%x",ch);if (char_ready > 0)-char_ready;return(ch);elsereturn(0);/*写串口 */Serial_Write(char ch)

30、while(!(i np(open_port + SER_LSR) & 0x20) asm clioutp(open_port + SER_THR, ch);asm sti /*初始化串口 */Open_Serial(int port_base, int baud, int configuration) ope n_port = port_base;disable。；outp(port_base + SER_LCR, SER_DIV_LATCH_ON);outp(port_base + SER_DLL, baud);outp(port_base + SER_DLH, 0);outp(p

31、ort_base + SER_LCR, con figurati on);outp(port_base + SER_MCR, SER_GP02);outp(port_base + SER_IER, 1);if (port_base = COM_1 | port_base=COM_3)Oldsr = _dos_getvect(INT_SER_PORT_0);_dos_setvect(INT_SER_PORT_0, Serial_Isr);printf("nOpening Communications Channel Com Port #1/3n"); elseOldsr =

32、_dos_getvect(INT_SER_PORT_1);_dos_setvect(INT_SER_PORT_1, Serial_Isr);prin tf("nOpe ning Communi cati ons Channel Com Port #2/4n");old_i nt_mask = in p(PIC_IMR);outp(PIC_IMR, (port_base=COM_1) ? (old_i nt_mask & OxEF): (old_i nt_mask & 0xF7 ); en able();/*关闭串口 */Close_Serial( int p

33、ort_base)outp(port_base + SER_MCR, 0);outp(port_base + SER_IER, 0);outp(PIC_IMR, old_i nt_mask );if (port_base = COM_1)_dos_setvect(INT_SER_PORT_0, Old_Isr);prin tf("nClos ing Commun icati ons Channel Com Port #1.n"); else_dos_setvect(INT_SER_PORT_1, Old_Isr);printf("nClosing Communic

34、ations Channel Com Port #2.n");/*发送应用*/void main (i nt argc,char *argv)char ch,press;int don e=0;FILE *fp;argc=2;/argv1="c:comfile.c"if(argc<2)prin tf("nU sage:display file name.wav!");/ exit(1);if(fp=fope n(argv1,"r+b")=NULL)prin tf("ca nnot ope n the filen");/ exit(0);SER_BITS_8 |fseek(fp, 0, SEEK_SET);Open_Serial(COM_1,SER_BAUD_