| samhoo 回复于：2002-10-31 12:06:01 |
| 看看这个对你有没有帮助： http://www.programmersheaven.com/zone3/cat409/ |
| 想死你 回复于：2002-10-31 12:19:31 |
| 谢谢你，可那是DOS下的，不是UNIX下的呀。 |
| periscope 回复于：2002-10-31 13:11:49 |
| 在SCO5下和打开串口的tty设备进行read和write每什么区别 |
| 想死你 回复于：2002-10-31 13:15:04 |
| 关键我不会写对TTY的控制，是和写文件一样用FILE *fp类似吗？而且一边要发送文件，另一方要会自动接收。真是没法子，请各位帮助我一下。 |
| mindit 回复于：2002-10-31 17:04:56 |
| 先打开串口，再用read()和write()对串口进行读写（串口接Modem）,下面的函数用来打开串口： #include <stdio.h> #include <stdlib.h> #include <termio.h> #include <fcntl.h> OpenPort() { struct termio t; int sd; int ret; if ((sd=open("/dev/tty1a",O_RDWR))<0) { printf("open serial port failure\n"  ;exit(-1); } if ((ret=ioctl(sd,TCGETA,&t))<0) { printf("ioctl failure\n" ;close(sd); exit(-1); } t.c_lflag=0; t.c_cflag = B9600 | CS8 | CREAD | CLOCAL; t.c_iflag= BRKINT | IGNPAR | IGNCR | IXON | IXOFF | IXANY ; t.c_oflag=02; t.c_line=0; t.c_cc[7]=255; t.c_cc[4]=0; t.c_cc[5]=0; if ((ret=ioctl(sd,TCSETA,&t))<0) { printf("ioctl failure\n" ;close(sd); exit(-1); } } |
| mindit 回复于：2002-10-31 17:07:34 |
| 修改： #include <stdlib.h> #include <termio.h> #include <fcntl.h> int OpenPort() { struct termio t; int sd; int ret; if ((sd=open("/dev/tty1a",O_RDWR))<0) { printf("open serial port failure\n" ;exit(-1); } if ((ret=ioctl(sd,TCGETA,&t))<0) { printf("ioctl failure\n" ;close(sd); exit(-1); } t.c_lflag=0; t.c_cflag = B9600 | CS8 | CREAD | CLOCAL; t.c_iflag= BRKINT | IGNPAR | IGNCR | IXON | IXOFF | IXANY ; t.c_oflag=02; t.c_line=0; t.c_cc[7]=255; t.c_cc[4]=0; t.c_cc[5]=0; if ((ret=ioctl(sd,TCSETA,&t))<0) { printf("ioctl failure\n" ;close(sd); exit(-1); } return(sd); } |
| maizhi 回复于：2002-10-31 17:12:29 |
| 用socket通讯试试 |
| kk1978 回复于：2002-10-31 19:15:39 |
| 首先要打开串口，然后通过串口来向modem发at指令来进行通讯，编程的时候要特别注意要用适当的方式打开串口，其实对TTY的操作跟一般的文件操作没有特别的区别，区别就是在于串口通讯需要设置串口属性. |
| kk1978 回复于：2002-10-31 19:17:08 |
| /************************************************************** Function : open serial comport Param In : pszDevName : comport device name, eg."/dev/tty1a" uiBaud : baudrate. 50 -- 9600 bParity : parity. NOPRAITY, ODDPARITY, EVENPARITY bByteSize : size of a byte. 5 - 8 bStopBits : stop bits. 1 - 2 bFlowControl : flow control. NOFLOW, CTSRTS, XONXOFF uiOutQueueLen : length of output buffer queue uiInQueueLen : length of input buffer queue iDefTimeOut : default timeout bOperFlag : OP_READ , OP_WRITE Param Out : none Return Code >=0 : success, handle of this comport <0 : serOpenMany serAllocMem serOpenInFp serOpenOutFp serFlowCtrlBad serBaudBad serByteSizeBad serStopBitsBad serParityBad serSetInBuffer serSetOutBuffer ***************************************************************/ int serOpen(char *pszDevName, uint uiBaud, uchar bParity, uchar bByteSize, uchar bStopBits, uchar bFlowControl, uint uiOutQueueLen, uint uiInQueueLen, int iDefTimeOut, uchar bOperFlag { struct serialDef *pSer; struct termio termioNew; int i, fdIn, fdOut; int serHandle; if( iSerNum == -1 // initial struct pSerial{ for( i=0; i<MAXSERIALNUM; i++ pSerial[i] = NULL; iSerNum = 0; } if( iSerNum >= MAXSERIALNUM return (serOpenMany);i = 0; while( i<MAXSERIALNUM && pSerial[i]!=NULL i++;if( i >= MAXSERIALNUM return (serOpenMany);pSerial[i] = (struct serialDef *)malloc(sizeof(struct serialDef)); if( pSerial[i] == NULL return (serAllocMem);pSer = pSerial[i]; pSer->pusInBuffer = (uchar *)malloc(uiInQueueLen); if( pSer->pusInBuffer==NULL { free(pSer); return (serAllocMem); } pSer->pusOutBuffer = (uchar *)malloc(uiOutQueueLen); if( pSer->pusOutBuffer==NULL { free(pSer->pusInBuffer); free(pSer); return (serAllocMem); } pSer->uiInQueueLen = uiInQueueLen; pSer->uiOutQueueLen = uiOutQueueLen; serHandle = i; if( bOperFlag & OP_READ { if( (pSer->fpIn=fopen(pszDevName, "rb" ) == NULL return (serOpenInFp);fdIn = fileno(pSer->fpIn); ioctl( fdIn, TCGETA, &termioNew ;} if( bOperFlag & OP_WRITE { if( (pSer->fpOut=fopen(pszDevName, "wb" ) == NULL return (serOpenOutFp);fdOut = fileno(pSer->fpOut); ioctl( fdOut, TCGETA, &termioNew ;} pSer->iDefTimeOut = iDefTimeOut; /* termioNew.c_iflag=0; termioNew.c_oflag=0; termioNew.c_lflag=0; termioNew.c_line=0; termioNew.c_cflag = ( 0x0CBD&~CBAUD | CTSFLOW | RTSFLOW ;termioNew.c_cc[VEOF]=1; termioNew.c_cc[VEOL]=0; */ termioNew.c_cflag = ( 0x0CBD&~CBAUD ;termioNew.c_cc[VMIN] = 1; // A read operation is not satisfied until receive // one character termioNew.c_cc[VTIME] = 0; // A read operation will waiting switch( bFlowControl { case NOFLOW: break; case CTSRTS: termioNew.c_cflag |= CTSFLOW | RTSFLOW; break; case XONXOFF: termioNew.c_iflag |= IXON | IXOFF; break; default : return (serFlowCtrlBad); }//switch; switch( uiBaud { case 50: termioNew.c_cflag|=B50; break; case 75: termioNew.c_cflag|=B75; break; case 110: termioNew.c_cflag|=B110; break; case 134: termioNew.c_cflag|=B134; break; case 150: termioNew.c_cflag|=B150; break; case 200: termioNew.c_cflag|=B200; break; case 300: termioNew.c_cflag|=B300; break; case 600: termioNew.c_cflag|=B600; break; case 1200: termioNew.c_cflag|=B1200; break; case 1800: termioNew.c_cflag|=B1800; break; case 2400: termioNew.c_cflag|=B2400; break; case 4800: termioNew.c_cflag|=B4800; break; case 9600: termioNew.c_cflag|=B9600; break; default: return (serBaudBad); } switch( bByteSize { case 5: termioNew.c_cflag|=CS5; break; case 6: termioNew.c_cflag|=CS6; break; case 7: termioNew.c_cflag|=CS7; break; case 8: termioNew.c_cflag|=CS8; break; default: return (serByteSizeBad); } switch( bStopBits { case 1: break; case 2: termioNew.c_cflag|=CSTOPB; break; default: return (serStopBitsBad); } switch( bParity { case NOPARITY: break; case ODDPARITY: termioNew.c_cflag|=PARODD; break; case EVENPARITY: termioNew.c_cflag|=PARENB; break; default: return (serParityBad); } termioNew.c_cflag |= CLOCAL; if( bOperFlag & OP_WRITE { ioctl(fdOut, TCGETA, &pSer->termioOld); ioctl(fdOut, TCSETA, &termioNew); } if(bOperFlag & OP_READ) { ioctl( fdIn, TCGETA, &pSer->termioOld ;termioNew.c_cflag|=CREAD; ioctl( fdIn, TCSETA, &termioNew); } if(bOperFlag & OP_READ) { if( setvbuf( pSer->fpIn,(char *)pSer->pusInBuffer,_IOFBF,uiInQueueLen )return (serSetInBuffer); fflush(pSer->fpIn); } if(bOperFlag & OP_WRITE) { if( setvbuf(pSer->fpOut,(char *)pSer->pusOutBuffer,_IOFBF,uiOutQueueLen )return (serSetOutBuffer); fflush(pSer->fpOut); } pSer->bOperFlag = bOperFlag; iSerNum++; return (serHandle); } |
| kk1978 回复于：2002-10-31 19:20:40 |
| /************************************************************** Function : receive bytes from serial comport Param In : iHandle : handle returned by serOpen uiRecvCnt: bytes of accii buffer iTimeOut : timeout if equals 0 use default timeout Param Out : psBuf : ascii buffer which will be received Return Code: =0 : OK <0 : serTimeOut serRecvFail ***************************************************************/ int serReceiveBuf( int iHandle, char *psBuf, uint uiRecvCnt, int iTimeOut { int iCnt, iRet; int fdIn; fdIn = fileno( pSerial[iHandle]->fpIn ;if( setjmp(tohere2) return (serTimeOut);signal( SIGALRM, alrm2 ;if( iTimeOut>0 alarm(iTimeOut);else if( iTimeOut==0 alarm( pSerial[iHandle]->iDefTimeOut ;for( iCnt=0; iCnt<uiRecvCnt; iCnt++ { while( ( iRet=read(fdIn,psBuf+iCnt,1) == 0 ;if( iRet<0 { alarm(0); return (serRecvFail); } } alarm(0); return (serOK); } |
| 想死你 回复于：2002-10-31 20:19:24 |
| 非常感谢，我去试试。：））） |
延伸阅读
文章来源于领测软件测试网 https://www.ltesting.net/
