c语言串口通信范例 This manuscript was revised by the office on December 22, 2012一个c语言的串口通信程序范例标签：分类：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 <>#include <>#include <>#include <>#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=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;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<MaxBufLen-1) 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<MaxBufLen-1)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 <>#include <>#include <>#include <>#include <>#include <>#define RXD 0 .);void putb(unsigned char ch).){unsigned char ch;ch=inportb(portaddr+RXD);putb(ch);incount++; n");exit(1);}else{printf("The used port is :COM%d\n",ComNum); };Getportaddr(port); .#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 receivebuffer*/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_SIZE-1)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_SIZE-1)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 clioutp(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:\\";if(argc<2){printf("\nUsage:display !!!");// 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。