Question

我正在尝试使用libserial从串口读取。代码设置与传感器（arduino）的串行端口通信，然后要求用户输入以从串行端口读取数据固定次数。

代码编译并运行。但是它忽略了从std :: cin获取用户输入并保持运行完成的行。它不会暂停使用cin捕获数据。每次我跑，从cin读取的值被设置为一些垃圾值，如-344969024，-1750564672,139065363等。代码和示例输出如下：

我在ubuntu 14.04，gcc-4.8.4。 Cannot read from stdin after initializing serial port

也报告了此行为

#include <SerialStream.h>
#include "SerialPort.h"
#include <iostream>
//#include <unistd.h>
//#include <cstdlib>

#include <fstream>
#include <string>

using namespace LibSerial;

int main(int argc,char * argv[])
{

    SerialPort serial_port ("/dev/ttyUSB0") ;
    serial_port.Open() ;
    serial_port.SetBaudRate( SerialPort::BAUD_115200 );
    serial_port.SetCharSize( SerialPort::CHAR_SIZE_8 );   

    std::ofstream out("output.txt");

    int i=0;

    for (i=0;i<4;i++)
    {
      std::cout << serial_port.ReadLine() ; // necessary to read headers from sensor connected to serial port
    }

    serial_port.WriteByte( 'S' ); // necessary to initiate the communication from sensor connected to serial port

    int num_readings;    
    std::cout <<"enter number of readings to take" << std::endl;
    std::cin>>num_readings;
    int j=0;
    while(j<num_readings)
    {
    std::cout << serial_port.ReadLine() ;
    j++;
    std::cout << "came inside loop"<< std::endl;
    }

     return 0;
}

示例输出：

came inside new loop
quat    -0.98   0.06    0.16    -0.10
came inside new loop
quat    -0.98   0.06    0.16    -0.10
came inside new loop
quat    -0.98   0.06    0.16    -0.10
came inside new loop
quat    -0.98   0.06    0.16    -0.10
came inside new loop
quat    -0.98   0.06    0.16    -0.10
came inside new loop
quat    -0.98   0.06    0.16    -0.10
came inside new loop
quat    -0.98   0.06    0.16    -0.10
came inside new loop
quat    -0.98   0.06    0.16    -0.10
came inside new loop
quat    -0.98   0.06    0.16    -0.10
came inside new loop
quat    -0.98   0.06    0.16    -0.10
came inside new loop
quat    -0.98   0.06    0.16    -0.10
came inside new loop
quat    -0.98   0.06    0.16    -0.10
came inside new loop
quat    -0.98   0.06    0.16    -0.10
came inside new loop
quat    -0.98   0.06    0.16    -0.10
came inside new loop
quat    -0.98   0.06    0.16    -0.10
came inside new loop
quat    -0.98   0.06    0.16    -0.10
came inside new loop
quat    -0.98   0.06    0.16    -0.10
came inside new loop
quat    -0.98   0.06    0.16    -0.10
came inside new loop
quat    -0.98   0.06    0.16    -0.10
came inside new loop
quat    -0.98   0.06    0.16    -0.10
came inside new loop
quat    -0.98   0.06    0.16    -0.10
came inside new loop
quat    -0.98   0.06    0.16    -0.10
came inside new loop
quat    -0.98   0.06    0.16    -0.10
came inside new loop
quat    -0.98   0.06    0.16    -0.10
came inside new loop
quat    -0.98   0.06    0.16    -0.10
came inside new loop
quat    -0.98   0.06    0.16    -0.10
came inside new loop
quat    -0.98   0.06    0.16    -0.10
came inside new loop
quat    -0.98   0.06    0.16    -0.10
came inside new loop
quat    -0.98   0.06    0.16    -0.10
came inside new loop
quat    -0.98   0.06    0.16    -0.10
came inside new loop
quat    -0.98   0.06    0.16    -0.10
came inside new loop
quat    -0.98   0.06    0.16    -0.10
came inside new loop
quat    -0.98   0.06    0.16    -0.10
came inside new loop
quat    -0.98   0.06    0.16    -0.10
came inside new loop
quat    -0.98   0.06    0.16    -0.10
came inside new loop
quat    -0.98   0.06    0.16    -0.10
came inside new loop
quat    -0.98   0.06    0.16    -0.10
came inside new loop
quat    -0.98   0.06    0.16    -0.10
came inside new loop
quat    -0.98   0.06    0.16    -0.10
came inside new loop
quat    -0.98   0.06    0.16    -0.10
came inside new loop
quat    -0.98   0.06    0.16    -0.10
came inside new loop
quat    -0.98   0.06    0.16    -0.10
came inside new loop
quat    -0.98   0.06    0.16    -0.10
came inside new loop
quat    -0.98   0.06    0.16    -0.10
came inside new loop
quat    -0.98   0.06    0.16    -0.10
came inside new loop
quat    -0.98   0.06    0.16    -0.10
came inside new loop
quat    -0.98   0.06    0.16    -0.10
came inside new loop

使用libserial从串口读取时，不能读取std :: cin

0 个答案: