c语言串口通信范例

1、一个c语言的串口通信程序范例L3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cc#，一些资料，找来做个记录，也许大家用的着#include<stdio.h>#include<dos.h>#includevconio.h>#include<string.h>#defineCOM2320x2f8#defineCOMINT0x0b#defineMaxBufLen500#definePort82590x200x20#defineEofIntstaticintcom

2、portaddr;staticcharintvectnum;staticunsignedcharmaskb;staticunsignedcharBufferMaxBufLen;staticintCharsInBuf,Circln,CircOut;staticvoid(interruptfar*OldAsynclnt)();staticvoidinterruptfarAsyncInt(void);voidInit_COM(intComPortAddr,unsignedcharIntVectNum,intBaud,unsignedcharData,unsignedcharStop,unsigned

3、charParity)unsignedcharHigh,Low;intf;comportaddr=ComPortAddr;intvectnum=1ntVectNum;CharsInBuf=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;elseif(Parit

4、y=1)Data=Data|0x8;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=0x0c)outp(Port8259+1,maskb&0xef);elseoutp(Port8259+1,maskb&0xf7);staticvoidinterrup

5、tfarAsyncInt(void)disable();if(CharsInBuf<MaxBufLen)BufferCircIn=inp(comportaddr);if(CircIn<MaxBufLen-1)CircIn+;elseCircIn=0;if(CircIn=CircOut)CircOut+;elseCharsInBuf+;enable();outp(Port8259,EofInt);voidRestore(void)setvect(intvectnum,OldAsyncInt);outp(Port8259+1,maskb);intGetCharInBuf(unsigne

6、dchar*Char)intFlag;Flag=-1;if(CharsInBuf>0)(*Char)=BufferCircOut;if(CircOut<MaxBufLen-1)CircOut+;elseCircOut=0;CharsInBuf-;Flag=0;returnFlag;intSendChar(unsignedcharChar)if(inp(comportaddr+5)&0x20)=0)return-1;outp(comportaddr,Char);return0;main()inti,c;unsignedcharInChar;Init_COM(COM232,CO

7、MINT,1200,8,1,0);while(1)if(kbhit()if(InChar=getch()=27)break;elsewhile(SendChar(InChar);if(GetCharInBuf(&InChar)=0)printf("%c",InChar);Restore();接收程序：#include<dos.h>#include<fstream.h>接收发送波特率调节低8位波特率调节高8位中断起用寄存器中断标识寄存器线路控制寄存器调制解调器控制寄存器线路状态寄存器调制解调器状态寄存器接收发送波特率调节低8位波特率调节高8位中

8、断起用寄存器中断标识寄存器线路控制寄存器调制解调器控制寄存器线路状态寄存器调制解调器状态寄存器#include<conio.h>#include<stdio.h>#include<stdlib.h>#include<math.h>#defineRXD0/#defineTXD0/#defineLSB0/#defineMSB1/#defineIER1/#defineIIR2/#defineLCR3/#defineMCR4/#defineLSR5/#defineMSR6/#defineIERV1#defineOUT20x08#defineERTS2#d

9、efineEDTR1#defineEMPTY0X20#defineREADY0X30#defineICREG0X20#defineIMASKREG0X21#defineEOI0X20#defineWAITCOUNT5000#defineBUFFLEN2048/用于存储字符的数组的界#defineALTE0X12#defineALTQ0X10#defineSER_BAUD_120096#defineSER_BAUD_240048#defineSER_BAUD_96000x0C#defineSER_BAUD_192006#defineSER_STOP_10/*/1stopbitpercharact

10、er*/#defineSER_STOP_24/*/2stopbitspercharacter*/#defineSER_BITS_50/*/send5bitcharacters*/#defineSER_BITS_61/*/send6bitcharacters*/#defineSER_BITS_72/*/send7bitcharacters*/#defineSER_BITS_83/*/send8bitcharacters*/#defineSER_PARITY_NONE0/*/noparity*/#defineSER_PARITY_ODD8/*/oddparity*/#defineSER_PARIT

11、Y_EVEN24/*/evenparity*/intport;intComNum;unsignedportaddr;unsignedportf;unsignedintbaudtable=0x180,0xc0,0x60,0x30,0x18,0x0c,0x06;unsignedcharparitytable=0x08,0x18,0x00,0x28,0x38;unsignedcharbufferBUFFLEN;/recvbufintbuffin=0;intbuffout=0;intincount=0;intoutcount=0;voidinterrupt(*vect_com)(.);将中断得到的数据

12、写voidputb(unsignedcharch)/writeachartotherecvbuf到缓冲区inttemp;temp=buffin;if(+buffin=BUFFLEN)buffin=0;if(buffin!=buffout)bufferbuffin=ch;/printf("bufferin%d=%c",bufferbuffin);/getch();elsebuffin=temp;unsignedchargetb()/readacharfromtherecvbufif(buffout!=buffin)if(+buffout=BUFFLEN)buffout=0;/

13、printf("bufferout%d=%c",buffout,bufferbuffout);return(bufferbuffout);elsereturn(0xff);/*unsignedcharsender(unsignedcharch)outportb(portaddr2+TXD,ch);printf("nsenderoutportdata=%cn",ch);outcount+;return(1);*/voidinterruptreceiver(.)unsignedcharch;ch=inportb(portaddr+RXD);putb(ch);

14、incount+;/记录接收了多少个数据。outportb(ICREG,EOI);voidSerInit(intbaud,intconfiguration)disable();outportb(portaddr+LCR,0x80);outportb(portaddr+LSB,baud);outportb(portaddr+MSB,0x00);outportb(portaddr+LCR,configuration);enable();voidSerOpen(void)vect_com=getvect(portf+8);disable();inportb(portaddr+RXD);inportb

15、(portaddr+MSR);inportb(portaddr+LSR);inportb(portaddr+IIR);outportb(portaddr+IER,IERV);outportb(portaddr+MCR,OUT2|ERTS|EDTR);outportb(IMASKREG,inportb(IMASKREG)&(1<<portf);setvect(portf+8,receiver);enable();voidSerClose(void)disable();outportb(portaddr+IER,0);outportb(portaddr+MCR,0);outpo

16、rtb(IMASKREG,inportb(IMASKREG)|(1<<portf);enable();setvect(portf+8,vect_com);voidGetportaddr(intport)switch(port)case0:portaddr=0x3F8;break;case1:portaddr=0x2F8;break;case2:portaddr=0x3E8;break;case3:portaddr=0x2E8;break;portf=(port=0)?4:3;voidInt()unsignedcharkey,key2;port=ComNum-1;if(peek(0x

17、40,port*2)=0)printf("havenospecialcom.n");exit(1);elseprintf("Theusedportis:COM%dn",ComNum);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，设置波特率等SerOpen();doif(kbhit()key2=getch();if(key2=27)break;key=getb();if(key!=0xff)printf("

18、%xt",key);可选择接收数据的存放文件路径和文件FILE*fp;fp=fopen("C:Receivedata.dat","ab");/名if(fp=NULL)printf("Fileopenerror!");/fputc(key,fp);fwrite(&key,sizeof(unsignedchar),1,fp);fclose(fp);while(key2!=27);SerClose();/printf("%dcharhasbeenreceivedn",incount);/printf(&

19、quot;%dcharhasbeensendedn",outcount);/printf("nsum=%dn",sum);voidmain()/com1receiveprintf("PleaseinputthereceiveCOMnum:(14)n");cin>>ComNum;printf("thecurrentcomsetis:9600,even,databits8,stop1,");Int();printf("nnOVERn");exit(0);发送文件程序#include<dos.

20、h>#include<bios.h>#include<stdio.h>#include<math.h>#include<conio.h>#include<graphics.h>#ifdef_cplusplus#define_CPPARGS.#else#define_CPPARGS#endif#defineSER_RBF0#defineSER_THR0#defineSER_IER1#defineSER_IIR2#defineSER_LCR3#defineSER_MCR4#defineSER_LSR5#defineSER_MSR6#

21、defineSER_DLL0#defineSER_DLH1#defineSER_BAUD_120096#defineSER_BAUD_240048#defineSER_BAUD_960012#defineSER_BAUD_192006#defineSER_GP028#defineCOM_10x3F8#defineCOM_20x2F8/*/baseportaddressofport1*/#defineCOM_30x3E8#defineCOM_40x2E8#defineSER_STOP_10/*/1stopbitpercharacter*/#defineSER_STOP_24/*/2stopbit

22、spercharacter*/#defineSER_BITS_50/*/send5bitcharacters*/#defineSER_BITS_61/*/send6bitcharacters*/#defineSER_BITS_72/*/send7bitcharacters*/#defineSER_BITS_83/*/send8bitcharacters*/#defineSER_PARITY_NONE0/*/noparity*/#defineSER_PARITY_ODD8/*/oddparity*/#defineSER_PARITY_EVEN24/*/evenparity*/#defineSER

23、_DIV_LATCH_ON128/*/usedtoturnreg0,1intodivisorlatch*/#definePIC_IMR0x21/*/pic'sinterruptmaskreg.*/#definePIC_ICR0x20/*/pic'sinteruptcontrolreg.*/#defineINT_SER_PORT_00x0C/*/port0interruptcom1&3*/#defineINT_SER_PORT_10x0B/*/port0interruptcom2&4*/#defineSERIAL_BUFF_SIZE128/*/currentsiz

24、eofcirculatingreceivebuffer*/voidinterruptfar(*Old_Isr)(_CPPARGS);/*/holdsoldcomportinterrupthandler*/charser_bufferSERIAL_BUFF_SIZE;/*/thereceivebuffer*/intser_end=-1,ser_start=-1;/*/indexesintoreceivebuffer*/intser_ch,char_ready=0;/*/currentcharacterandreadyflag*/intold_int_mask;/*/theoldinterrupt

25、maskonthePIC*/intopen_port;/*/thecurrentlyopenport*/intserial_lock=0;/*/serialISRsemaphoresothebuffer*/*/isn'talteredwillitisbeingwritten*/*/tobytheISR*/*写串口*/voidinterruptfarSerial_Isr(_CPPARGS)serial_lock=1;ser_ch=inp(open_port+SER_RBF);if(+ser_end>SERIAL_BUFF_SIZE-1)ser_end=0;ser_bufferser

26、_end=ser_ch;+char_ready;outp(PIC_ICR,0x20);serial_lock=0;intReady_Serial()return(char_ready);/*读串口*/intSerial_Read()intch;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)

27、;elsereturn(0);/*写串口*/Serial_Write(charch)while(!(inp(open_port+SER_LSR)&0x20)asmclioutp(open_port+SER_THR,ch);asmsti/*初始化串口*/Open_Serial(intport_base,intbaud,intconfiguration)open_port=port_base;disable();outp(port_base+SER_LCR,SER_DIV_LATCH_ON);outp(port_base+SER_DLL,baud);outp(port_base+SER_D

28、LH,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("nOpeningCommunicationsChannelComPort#1/3.n");elseOld_Isr=_dos_getve

29、ct(INT_SER_PORT_1);_dos_setvect(INT_SER_PORT_1,Serial_Isr);printf("nOpeningCommunicationsChannelComPort#2/4.n");old_int_mask=inp(PIC_IMR);outp(PIC_IMR,(port_base=COM_1)?(old_int_mask&0xEF):(old_int_mask&0xF7);enable();/*关闭串口*/Close_Serial(intport_base)outp(port_base+SER_MCR,0);outp

30、(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("nClosingCommunicationsChannelComPort#1.n");else_dos_setvect(INT_SER_PORT_1,Old_Isr);printf("nClosingCommunicationsChannelComPort#2.n");/*发送应用*/voidmain(intargc,char*ar

31、gv)charch,press;intdone=0;FILE*fp;argc=2;/argv1="c:comfile.c"if(argc<2)printf("nUsage:displayfilename.wav!");/exit(1);if(fp=fopen(argv1,"r+b")=NULL)printf("cannotopenthefilen");/exit(0);fseek(fp,0,SEEK_SET);Open_Serial(COM_1,SER_BAUD_9600,SER_PARITY_EVEN|SER_BITS_8|SER_STOP_1);printf("com:1;bps:9600;parity:even;bits:8;stopbit:1")