c语言串口通信范例

1、一个 c 语言的串口通信程序范例标签： 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 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 0x20 static int c

2、omportaddr;static char intvectnum;static unsigned char maskb;static unsigned char BufferMaxBufLen;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 D

3、ata, 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);

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 ou

5、tp(Port8259+1,maskb&0xf7);static void interrupt far AsyncInt(void)disable();if(CharsInBuf<MaxBufLen)BufferCircIn=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,Ol

6、dAsyncInt);outp(Port8259+1,maskb);int GetCharInBuf(unsigned char *Char)int Flag;Flag=-1;if(CharsInBuf>0)(*Char)=BufferCircOut;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(comporta

7、ddr,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 &l

8、t;>#include <>#include <>#define RXD 0 .);void putb(unsigned char ch).)unsigned char ch; ch=inportb(portaddr+RXD);putb(ch);incount+; n");exit(1);elseprintf("The used port is :COM%dn",ComNum); ;Getportaddr(port); .#else#define _CPPARGS#endif#define SER_RBF 0#define SER_T

9、HR 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 /*/ bas

10、e 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 c

11、haracters*/#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 interr

12、upt 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 (*O

13、ld_Isr)(_CPPARGS); /*/ holds old com port interrupt handler*/ char ser_bufferSERIAL_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 P

14、IC*/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_S

15、IZE-1) ser_end = 0;ser_bufferser_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_bufferser_start; printf("

16、%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_b

17、ase + 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_

18、PORT_0, Serial_Isr); printf("nOpening Communications Channel Com Port #1 /3.n");elseOld_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_

19、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

20、 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;/argv1="c:"if(argc<2)printf("nUsage:display !");/ exit(1);if(fp=fopen(

21、argv1,"r+b")=NULL)printf("cannot open the filen");/ 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