linux 串口接收

#include<stdio.h>
#include<sys/types.h>
#include<fcntl.h>
#include<termios.h>
#defineBAUDRATEB115200
#defineMODEMDEVICE"/dev/ttyUSB1"
intmain()
{
intfd,c=0,res;
structtermiosoldtio,newtio;
charbuf[256];
printf("start.../n");
fd=open(MODEMDEVICE,O_RDWR|O_NOCTTY);
if(fd<0)
{
perror(MODEMDEVICE);
exit(1);
}
printf("open.../n");
tcgetattr(fd,&oldtio);
bzero(&newtio,sizeof(newtio));
newtio.c_cflag=BAUDRATE|CS8|CLOCAL|CREAD;
newtio.c_iflag=IGNPAR;
newtio.c_oflag=0;
newtio.c_lflag=ICANON;
tcflush(fd,TCIFLUSH);
tcsetattr(fd,TCSANOW,&newtio);
printf("reading.../n");
while(1)
{
res=read(fd,buf,255);
//buf[res]=='/0';
printf("res=%dvuf=%s/n",res,buf);
//if(buf[0]=='@')break;
}
printf("close.../n");
close(fd);
tcsetattr(fd,TCSANOW,&oldtio);
return0;

}