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標題: GPS數據處理 [打印本頁]

作者: 1455575318 時間: 2017-6-12 15:51
標題: GPS數據處理
int gps::set_opt(int fd,int nSpeed, int nBits, char nEvent, int nStop)
{
struct termios newtio,oldtio;
if  ( tcgetattr( fd,&oldtio)  !=  0)
{
      perror("SetupSerial 1");
      return -1;
}
bzero( &newtio, sizeof( newtio ) );
newtio.c_cflag  |=  CLOCAL | CREAD;
newtio.c_cflag &= ~CSIZE;

switch( nBits )
{
case 7:
      newtio.c_cflag |= CS7;
      break;
case 8:
      newtio.c_cflag |= CS8;
      break;
}

switch( nEvent )
{
case 'O':                   //奇校驗
      newtio.c_cflag |= PARENB;
      newtio.c_cflag |= PARODD;
      newtio.c_iflag |= (INPCK | ISTRIP);
      break;
case 'E':                   //偶校驗
      newtio.c_iflag |= (INPCK | ISTRIP);
      newtio.c_cflag |= PARENB;
      newtio.c_cflag &= ~PARODD;
      break;
case 'N':                   //無校驗
      newtio.c_cflag &= ~PARENB;
      break;
}

switch( nSpeed )
{
case 2400:
      cfsetispeed(&newtio, B2400);
      cfsetospeed(&newtio, B2400);
      break;
case 4800:
      cfsetispeed(&newtio, B4800);
      cfsetospeed(&newtio, B4800);
      break;
case 9600:
      cfsetispeed(&newtio, B9600);
      cfsetospeed(&newtio, B9600);
      break;
case 115200:
      cfsetispeed(&newtio, B115200);
      cfsetospeed(&newtio, B115200);
      break;
default:
      cfsetispeed(&newtio, B9600);
      cfsetospeed(&newtio, B9600);
      break;
}
if( nStop == 1 )
{
      newtio.c_cflag &=  ~CSTOPB;
}
else if ( nStop == 2 )
{
      newtio.c_cflag |=  CSTOPB;
}
newtio.c_cc[VTIME]  = 0;
newtio.c_cc[VMIN] = 0;
tcflush(fd,TCIFLUSH);
if((tcsetattr(fd,TCSANOW,&newtio))!=0)
{
      qDebug()<<"com set error"<<endl;
      return -1;
}
qDebug()<<"set done!"<<endl;
return 0;
}

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