c語(yǔ)言串口通信范例1

/一個(gè)c語(yǔ)言的串口通信程序范例標(biāo)簽：c語(yǔ)言串口通信通信程序it分類(lèi)：技術(shù)筆記最近接觸一個(gè)項(xiàng)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(cè)，好久沒(méi)有接觸cc#，一些資料，找來(lái)做個(gè)記錄，也許大家用的著#include<stdio.h>

#include<dos.h>

#include<conio.h>

#include<string.h>#defineCOM232

0x2f8

#defineCOMINT

0x0b#defineMaxBufLen

500

#definePort8259

0x20

#defineEofInt

0x20staticint

comportaddr;

staticcharintvectnum;

staticunsignedcharmaskb;

staticunsignedcharBuffer[MaxBufLen];

staticint

CharsInBuf,CircIn,CircOut;staticvoid(interruptfar*OldAsyncInt)();

staticvoidinterruptfarAsyncInt(void);voidInit_COM(intComPortAddr,unsignedcharIntVectNum,intBaud,

unsignedcharData,unsignedcharStop,unsignedcharParity)

{

unsignedcharHigh,Low;

intf;

comportaddr=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//發(fā)送

#defineLSB0//波特率調(diào)節(jié)低8位

#defineMSB1//波特率調(diào)節(jié)高8位

#defineIER1//中斷起用寄存器

#defineIIR2//中斷標(biāo)識(shí)寄存器

#defineLCR3//線路控制寄存器

#defineMCR4//調(diào)制解調(diào)器控制寄存器

#defineLSR5//線路狀態(tài)寄存器

#defineMSR6//調(diào)制解調(diào)器狀態(tài)寄存器

#defineIERV1

#defineOUT20x08

#defineERTS2

#defineEDTR1

#defineEMPTY0X20

#defineREADY0X30

#defineICREG0X20

#defineIMASKREG0X21

#defineEOI0X20

#defineWAITCOUNT5000

#defineBUFFLEN2048//用于存儲(chǔ)字符的數(shù)組的界

#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_61/*/send6bitcharacters*/

#defineSER_BITS_72/*/send7bitcharacters*/

#defineSER_BITS_83/*/send8bitcharacters*/

#defineSER_PARITY_NONE0/*/noparity*/

#defineSER_PARITY_ODD8/*/oddparity*/

#defineSER_PARITY_EVEN24/*/evenparity*/

intport;

intComNum;

unsignedportaddr;

unsignedportf;

unsignedintbaudtable[]={0x180,0xc0,0x60,0x30,0x18,0x0c,0x06};

unsignedcharparitytable[]={0x08,0x18,0x00,0x28,0x38};

unsignedcharbuffer[BUFFLEN];//recvbuf

intbuffin=0;

intbuffout=0;

intincount=0;

intoutcount=0;

voidinterrupt(*vect_com)(...);

voidputb(unsignedcharch)//writeachartotherecvbuf將中斷得到的數(shù)據(jù)寫(xiě)到緩沖區(qū)

{

inttemp;

temp=buffin;

if(++buffin==BUFFLEN)

buffin=0;

if(buffin!=buffout)

{buffer[buffin]=ch;

//printf("bufferin[%d]=%c",buffer[buffin]);

//getch();

}

else

buffin=temp;

};

unsignedchargetb()//readacharfromtherecvbuf

{

if(buffout!=buffin)

{

if(++buffout==BUFFLEN)

buffout=0;

//printf("bufferout[%d]=%c",buffout,buffer[buffout]);

return(buffer[buffout]);

}

else

return(0xff);

};

/*unsignedcharsender(unsignedcharch)

{

outportb(portaddr2+TXD,ch);

printf("\nsenderoutportdata=%c\n",ch);

outcount++;

return(1);

};

*/

voidinterruptreceiver(...)

{

unsignedcharch;

ch=inportb(portaddr+RXD);

putb(ch);

incount++;//記錄接收了多少個(gè)數(shù)據(jù)。

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，設(shè)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");//可選擇接收數(shù)據(jù)的存放文件路徑和文件名

if(fp==NULL)printf("error!");

//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);

};

－－－－－－－－－－－－－－－

發(fā)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

#define__CPPARGS...

#else

#define__CPPARGS

#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=-1,ser_start=-1;/*/indexesintoreceivebuffer*/

intser_ch,char_ready=0;/*/currentcharacterandreadyflag*/

intold_int_mask;/*/theoldinterruptmaskonthePIC*/

intopen_port;/*/thecurrentlyopenport*/

intserial_lock=0;/*/serialISRsemaphoresothebuffer*/

/*/isn'talteredwillitisbeingwritten*/

/*/tobytheISR*/

/*寫(xiě)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_buffer[ser_end]=ser_ch;

++char_ready;

outp(PIC_ICR,0x20);

serial_lock=0;

}

intReady_Serial()

{

return(char_ready);

}

/*讀串口*/

intSerial_Read()

{

intch;

while(serial_lock){}

if(ser_end!=ser_start)

{

if(++ser_start>SERIAL_BUFF_SIZE-1)

ser_start=0;

ch=ser_buffer[ser_start];

printf("%x",ch);

if(char_ready>0)

--char_ready;

return(ch);

}

else

return(0);

}

/*寫(xiě)串口*/

Serial_Write(charch)

{

while(!(inp(open_port+SER_LSR)&0x20)){}

asmcli

outp(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_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();

}

/*關(guān)閉串口*/

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");

}

}

/*發(fā)送應(yīng)用*/

voidmain(intargc,char*argv[])

{

charch,press;

intdone=0;

FILE*fp;

argc=2;

//argv[1]="c:\\comfile.c";

if(argc<2)

{

printf("\nUsage:display!!!");

//exit(1);

}

if((fp=fopen(argv[1],"r+b"))==NULL)

{

printf("cannotopenthefile\n");

//exit(0);

}

fseek(fp,0,SEEK_SET);

Open_Seria