一个c语言的串口通信程序范例分类：技术笔记欧阳学文标签：c语言串口通信通信程序it最近接触一个项目，用HLC1C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 MaxBufLen 500#define Port8259 0x20#define EofInt 0x20static int comportaddr;static char intvectnum;static unsigned char maskb;static unsigned char Buffer[MaxBufLen];static int CharsInBuf,CircIn,CircOut;static void (interrupt far *OldAsyncInt)();static void 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;CharsInBuf=0;CircIn=0;CircOut=0;f=(Baud/100);f=1152/f; High=f/256;Low=fHigh*256;outp(ComPortAddr+3,0x80);outp(ComPortAddr,Low);outp(ComPortAddr+1,High);Data=(Data5)|((Stop1)*4);if(Parity==2) Data=Data|0x18;else if(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); else outp(Port8259+1,maskb&0xf7);}static void interrupt far AsyncInt(void){disable();if(CharsInBuf<MaxBufLen)Buffer[CircIn]=inp(comportaddr);if(CircIn<MaxBufLen1) CircIn++;else CircIn=0;if(CircIn==CircOut) CircOut++;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)=Buffer[CircOut];if(CircOut<MaxBufLen1)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_COM(COM232,COMINT,1200,8,1,0);while(1){if(kbhit()){if((InChar=getch())==27)break;else while(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> #define RXD 0 //接收#define TXD 0 //发送#define LSB 0 //波特率调节低8位#define MSB 1 //波特率调节高8位#define IER 1 // 中断起用寄存器#define IIR 2 //中断标识寄存器#define LCR 3 //线路控制寄存器#define MCR 4 //调制解调器控制寄存器#define LSR 5 //线路状态寄存器#define MSR 6 //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 BUFFLEN 2048 //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 /*/ 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 characters*/ #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 char paritytable[]={0x08,0x18,0x00,0x28,0x38};unsigned char buffer[BUFFLEN];//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 将中断得到的数据写到缓冲区{int temp;temp=buffin;if(++buffin==BUFFLEN)buffin=0;if(buffin!=buffout){buffer[buffin]=ch;// printf("bufferin[%d]=%c",buffer[buffin]);// getch();}elsebuffin=temp;}; unsigned char getb()//read a char from the recvbuf{if(buffout!=buffin){if(++buffout==BUFFLEN)buffout=0; //printf("bufferout[%d]=%c",buffout,buffer[buffout]);return(buffer[buffout]);}elsereturn(0xff);}; /*unsigned char sender( unsigned char ch){outportb(portaddr2+TXD,ch);printf("\nsender outportdata=%c\n",ch);outcount++;return(1);};*/ void interrupt receiver(...){unsigned char ch;ch=inportb(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,configuration);enable();};void SerOpen(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();};void SerClose(void){disable();outportb(portaddr+IER,0);outportb(portaddr+MCR,0);outportb(IMASKREG,inportb(IMASKREG)|(1<<portf));enable();setvect(portf+8,vect_com);}; void Getportaddr(int port){switch (port){ case 0: portaddr=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=ComNum1;if(peek(0x40,port*2)==0){ printf("have no special com .\n");exit(1);}else{ printf("The used port is :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("File open error!");// fputc(key,fp);fwrite(&key,sizeof(unsigned char),1,fp);fclose(fp);}}while (key2!=27);SerClose();// printf("%d char has been received\n",incount);// printf("%d char has been sended\n",outcount);// printf("\nsum=%d \n",sum);}void main()//com1 receive{ printf("Please input the receive COMnum:(1~4)\n");cin>>ComNum; printf("the current com set is:9600,even, data bits 8, stop 1,");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 #define __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_BAUD_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_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_ODD 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 interrupt 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_buffer[SERIAL_BUFF_SIZE]; /*/ the receive buffer*/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*/ /*/ isn't altered will it is being written*//*/ to by the ISR*//*写串口*/ void interrupt far Serial_Isr(__CPPARGS){serial_lock = 1; ser_ch = inp(open_port + SER_RBF); if (++ser_end > SERIAL_BUFF_SIZE1)ser_end = 0;ser_buffer[ser_end] = ser_ch;++char_ready;outp(PIC_ICR,0x20);serial_lock = 0;}int Ready_Serial(){return(char_ready);} /*读串口*/int Serial_Read(){int ch;while(serial_lock){} if (ser_end != ser_start){ if (++ser_start > SERIAL_BUFF_SIZE1)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(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 + 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 Communications 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 & 0xF7 ));enable();}/*关闭串口*/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, Old_Isr);printf("\nClosing Communications Channel Com Port #2.\n");}} /*发送应用*/ void main(int argc,char *argv[]){char ch,press;int done=0;FILE *fp;argc=2;//argv[1]="c:\\comfile.c";if(argc<2){ printf("\nUsage:display filename.wav!!!");// exit(1);} if((fp=fopen(argv[1],"r+b"))==NULL){ printf("cannot open the file\n");// 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;stop bit:1");printf("press any key to begin sending");getch();//Serial_Write(''); //该语句可用于发送单个字符while(!done&&ch != EOF) //发送文件开始{ch = fgetc(fp);//if(ch==EOF) Serial_Write(27);Serial_Write(ch);delay(30);if (kbhit()){press=getch();if (press==27){Serial_Write(27);done=1;}}}Close_Serial(COM_1);fclose(fp);}下面介绍最重要的MFC:CWnd：窗口，它是大多数“看得见的东西”的父类（Windows里几乎所有看得见的东西都是一个窗口，大窗口里有许多小窗口），比如视图CView、框架窗口CFrameWnd、工具条CToolBar、对话框CDialog、按钮CButton，etc;一个例外是菜单（CMenu）不是从窗口派生的。