Linux串行端口:输入中缺少数据

    #include <fcntl.h>   
    #include <termios.h> 
    #include <unistd.h>  
    #include <errno.h>   
    #include <cerrno>
    #include <iostream>
    #include <stdio.h>
    #include <stdlib.h>
    #include <string.h>
    #include <fstream>
    #include <sys/types.h>
    #include <sys/socket.h>
    #include <netinet/in.h>
    #include <cstdlib>
    #include <ctime>
    using namespace std;
    typedef struct termios ComSet;
    int main()
    {
    int acm=-1;                                   
    acm=open("/dev/ttyACM0",O_RDWR | O_NOCTTY);
    if(acm == -1)
    {
    cout<<"Error Opening ttyACM0"<<endl;
    exit(1);
    }
    else
    {
    cout<<"Preparing ttyACM0..."<<endl;
    ComSet SerialSettings;
    tcgetattr(acm, &SerialSettings);
    cfsetispeed(&SerialSettings,B9600);
    cfsetospeed(&SerialSettings,B9600);
 /* 8N1 Mode */
    SerialSettings.c_cflag &= ~PARENB;   
    SerialSettings.c_cflag &= ~CSTOPB;   
    SerialSettings.c_cflag &= ~CSIZE;   
    SerialSettings.c_cflag |=  CS8;     
    SerialSettings.c_cflag &= ~CRTSCTS;       
    SerialSettings.c_cflag |= CREAD | CLOCAL; 

    SerialSettings.c_iflag &= ~(IXON | IXOFF | IXANY);          
    SerialSettings.c_iflag &= ~(ICANON | ECHO | ECHOE | ISIG);  
    SerialSettings.c_oflag &= ~OPOST;                           
 /* Setting Time outs */
    SerialSettings.c_cc[VMIN]  = 10;     /* Read at least 10 characters */
    SerialSettings.c_cc[VTIME] = 0;     /* Wait indefinetly   */
    if((tcsetattr(acm,TCSANOW,&SerialSettings)) != 0)   
    {
        cout<< " ERROR ! in Setting attributes"<<endl;
    }
    else
    {
        cout<< "=======ttyACM0 Setting====="<<endl;
        cout<<"BaudRate = 9600 StopBits = 1 Parity = none"<<endl;
        cout<<"Reading ttyACM0... "<<endl;
        char read_buffer[1024];                                
        bzero(read_buffer,1024);
        int read_bytes=0;                                      
        while(1)
         {
                tcflush(acm, TCIFLUSH);                        
                read_bytes=read(acm,&read_buffer,1024);        
                if(read_bytes>0)
                {
                    cout<<read_buffer;
                    bzero(read_buffer,1024);
                }
         }
    }

  close(acm); /* Close the serial port */
}
return 0;
}

出于某种原因，代码无法正常工作我正试图从arduino中读取，因为它早些时候工作正常，它给了我抓取的输出如

世界啊！你好，世界！ello世界！llo世界！llo世界！

改变的是

在终端输出中有一条额外的新行，这是使用cat/dev/ttyAMC0

你好，世界！

你好，世界！

你好，世界！

你好，世界！

你好，世界！

我想逐行读取，因为它是由arduino发送到终端的