串口设置：
ioctl(SerialDevFd, FIOBAUDRATE, 115200);
/* set to 'line‘ mode */
ioctl(SerialDevFd, FIOSETOPTIONS, OPT_TERMINAL & OPT_LINE );
/* set to data bits*/
ioctl(SerialDevFd, SIO_HW_OPTS_SET,8);
接受：
FD_ZERO (&readFds);
/* initialize bit mask */
FD_SET (SerialDevFd, &readFds);
width = SerialDevFd + 1;
/* loop forever reading data and servicing clients */
FOREVER
{
/* pend, waiting for one or more fds to become ready */
if ((numbit=select (width, &readFds, NULL, NULL, NULL)) == ERROR)
printf("typereadr: ERROR\n");
printf("typereadr: number=%d\n",numbit);
/* check if this fd has data to read */
if (FD_ISSET (SerialDevFd, &readFds))
{
FOREVER
{
bzero (buffer, MAX_DATA);
/* typically read from fd now that it is ready */
if ( (DataLen = read (SerialDevFd, buffer, MAX_DATA))==ERROR )
{
printf("typereadr: ERROR Reading\n");
}
/* normally service request, for this example print it */
printf ("typereadr: Reading...DataLen=%d %s\n",DataLen,(char*)buffer );
if(DataLen == 0)
break;
}
printf("typereadr: Read OK!");
}
}
出现问题：接受打印的数据很容易丢失？谢谢关注！
江苏 南京
