Boost asio串行端口“文件结束”

我试图读取来自arduino的串行数据,但当我运行程序时,它只读取缓冲区中的所有数据,即程序启动前实际发送的数据。然后我以以下错误终止:

terminate called after throwing an instance of 'boost::exception_detail::clone_impl<boost::exception_detail::error_info_injector<boost::system::system_error> >'
what():  read: End of file
Aborted (core dumped)

我甚至不想要程序执行前的数据。这是我的c++代码:

#include <iostream>
#include <stdint.h>

#include <boost/asio.hpp>
#include <boost/asio/serial_port.hpp>

using namespace boost;

int main() {
    asio::io_service io;
    asio::serial_port port(io);

    port.open("/dev/ttyUSB0");
    port.set_option(asio::serial_port_base::baud_rate(115200));

    char d;

    while ( true ) {
        asio::read(port, asio::buffer(&d, 1));
        std::cout << d << std::endl;
    }

    port.close();
}