c语言串口通信范例

一个c语言的串口通信程序范例标 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#definePort82590x20#defineEofInt0x20staticintcomportaddr;staticcharintvectnum;staticunsignedcharmaskb;staticunsignedcharBuffer[MaxBufLen];staticintCharsInBuf,Circln,CircOut;staticvoid(interruptfar*OldAsynclnt)();staticvoidinterruptfarAsyncInt(void);voidInit_COM(intComPortAddr,unsignedcharIntVectNum,intBaud,unsignedcharData,unsignedcharStop,unsignedcharParity){unsignedcharHigh,Low;intf;comportaddr二ComPortAddr;intvectnum=IntVectNum;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(Parity==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);)staticvoidinterruptfarAsyncInt(void){disable();if(CharsInBuf<MaxBufLen)Buffer[CircIn]=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(unsignedchar*Char)intFlag;Flag=-1;if(CharsInBuf>0){(*Char)=Buffer[CircOut];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,COMINT,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>#include<conio.h>#include<stdio.h>#include<stdlib.h>#include<math.h>#defineRXD0//接收#defineTXD0//发送#defineLSB0//波特率调节低8位#defineMSB1//波特率调节高8位#defineIER1//中断起用寄存器#defineIIR2//中断标识寄存器#defineLCR3//线路控制寄存器#defineMCR4//调制解调器控制寄存器#defineLSR5//线路状态寄存器#defineMSR6//调制解调器状态寄存器#defineIERV1#defineOUT20x08#defineERTS2#defineEDTR1#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/*/1stopbitpercharacter*/#defineSER_STOP_24/*/2stopbitspercharacter*/#defineSER_BITS_50/*/send5bitcharacters*/#defineSER_BITS_6 1 /*/ send 6 bit characters*/#defineSER_BITS_7 2 /*/ send 7 bit characters*/#defineSER_BITS_8 3 /*/ send 8 bit characters*/#define SER_PARITY_NONE 0 /*/ no parity*/#defineSER_PARITY_ODD8 /*/oddparity*/#defineSER_PARITY_EVEN 24 /*/ even parity*/intport;intComNum;unsignedportaddr;unsignedportf;unsignedintbaudtable□={0x180,0xc0,0x60,0x30,0x18,0x0c,0x06};unsignedcharparitytable□={0x08,0x18,0x00,0x28,0x38};unsignedcharbuffer[BUFFLEN];//recvbufintbuffin=0;intbuffout=0;intincount=0;intoutcount=0;voidinterrupt(*vect_com)(...);voidputb(unsignedcharch)//writeachartothere中断u得到的数据写到缓冲区{inttemp;temp=buffin;if(++buffin==BUFFLEN)buffin=0;if(buffin!=buffout){buffer[buffin]=ch;//printf(〃bufferin[%d]=%c〃,buffer[buffin]);//getch();}elsebuffin=temp;};unsignedchargetb()//readacharfromtherecvbuf(if(buffout!=buffin)(if(++buffout==BUFFLEN)buffout=0;//printf("bufferout[%d]=%c",buffout,buffer[buffout]);return(buffer[buffout]);}elsereturn(0xff);};/*unsignedcharsender(unsignedcharch){outportb(portaddr2+TXD,ch);printf("\nsenderoutportdata=%c\n",ch);outcount++;return(1);};*/voidinterruptreceiver(...){unsignedcharch;ch=inportb(portaddr+RXD);putb(ch);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(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);outportb(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(0x40,port*2)==0)(printf("havenospecialcom.\n");exit(1);}else(printf("Theusedportis:COM%d\n",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();do(if(kbhit())(key2=getch();if(key2==27){break;}};key=getb();if(key!=0xff){printf("%x\t",key);FILE*fp;fp=fopen("C:\\Receivedata.dat","ab");//可选择接收数据的存放文件路径和文件名if(fp==NULL)printf("Fileopenerror!");//fputc(key,fp);fwrite(&key,sizeof(unsignedchar),1,fp);fclose(fp);}}while(key2!=27);SerClose();//printf("%dcharhasbeenreceived\n",incount);//printf("%dcharhasbeensended\n",outcount);//printf("\nsum=%d\n",sum);}voidmain()//com1receive{printf("PleaseinputthereceiveCOMnum:(1~4)\n");cin>>ComNum;printf("thecurrentcomsetis:9600,even,databits8,stop1,");Int();printf("\n\nOVER\n");exit(0);};发送文件程序#include<dos.h>#include<bios.h>#include<stdio.h>#include<math.h>#include<conio.h>#include<graphics.h>#ifdef__cplusplus#defineCPPARGS...#else#defineCPPARGS#endif#defineSER_RBF0#defineSER_THR0#defineSER_IER1#defineSER_IIR2#defineSER_LCR3#defineSER_MCR4#defineSER_LSR5#defineSER_MSR6#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/*/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_PARITY_EVEN24/*/evenparity*/#defineSER_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/*/currentsizeofcirculatingreceivebuffer*/voidinterruptfar(*Old_Isr)(__CPPARGS);/*/holdsoldcomportinterrupthandler*/charser_buffer[SERIAL_BUFF_SIZE];/*/thereceivebuffer*/intser_end=T,ser_start=T;/*/indexesintoreceivebuffer*/intser_ch,char_ready=0;/*/currentcharacterandreadyflag*/intold_int_mask;/*/theoldinterruptmaskonthePIC*/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_SIZET)ser_end=0;ser_buffer[ser_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_SIZET)ser_start=0;ch=ser_buffer[ser_start];printf(〃％x〃，ch);if(char_ready>0)--char_ready;return(ch);}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,intconfigur{ation)open_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(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〃)；}else{Old_Isr=_dos_getvect(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(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*argv[]){charch,press;intdone=0;FILE*fp;argc=2;//argv[1]=〃c:\\comfile.c〃；if(argc<2){printf("\nUsage:displayfilename.wav!!!");//exit(1);}if((fp=fopen(argv[1],〃r+b〃))==NULL){printf("cannotopenthefile\n〃)；//exit(0);}fseek(fp,0,SEEK_SET);SER_BITS_8Open_Serial(COM_1,SER_BAUD_9600,SER_PARITY_EVENSE