Function send_comm

examples/libc/termios_test.c:260–273

}

int send_comm(int fd, const unsigned char *buffer, rt_size_t size)
{
    RT_ASSERT(RT_NULL != buffer);

    if(fd == -1)
    {
        return -1;
    }

    //serial framework does not support poll out now
    write(fd, buffer, size);

    return 0;
}

int flush_comm(int fd)
{