LINUX下串口程序

[hcamwdn]

最近在LINUX下写一个串口程序，结果8位数据位无校验（8N1）正常，8位数据位1个校检位（8E1或8O1）输出均出现乱码，我想请教一下各位是怎么回事，谢谢，以下是串口设置。
bzero( &newtio, sizeof( newtio ) );
cfmakeraw(&newtio);
tcflush(fd,TCIOFLUSH);


newtio.c_cflag &= ~CRTSCTS;
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;
default:
perror("unsupport data bits");
return -1;
}

switch( nParity )
{
case 'o':
case 'O':
newtio.c_cflag |= PARENB;
newtio.c_cflag |= PARODD;
newtio.c_iflag |= (INPCK | ISTRIP);
break;
case 'e':
case 'E':
newtio.c_cflag |= PARENB;
newtio.c_cflag &= ~PARODD;
newtio.c_iflag |= (INPCK | ISTRIP);
break;
case 'n':
case 'N':
newtio.c_cflag &= ~PARENB;
newtio.c_iflag &= ~(INPCK |ISTRIP);
break;
default:
perror("setting parity error\n");
return -1;
}

switch( nSpeed )
{
case 1200:
cfsetispeed(&newtio, B1200);
cfsetospeed(&newtio, B1200);
break;
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;
case 460800:
cfsetispeed(&newtio, B460800);
cfsetospeed(&newtio, B460800);
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_oflag &= ~OPOST;
newtio.c_cc[VTIME] = 1; /* unit: 1/10 second. */
newtio.c_cc[VMIN] = 1; /* minimal characters for reading */

if((tcsetattr(fd,TCSANOW,&newtio))!=0)
{
perror("com set error");
return -1;
}

[hcamwdn]

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