Function finsh_getchar

components/finsh/shell.c:157–199

}

int finsh_getchar(void)
{
#ifdef RT_USING_DEVICE
    char ch = 0;
#ifdef RT_USING_POSIX_STDIO
    if(read(rt_posix_stdio_get_console(), &ch, 1) > 0)
    {
        return ch;
    }
    else
    {
        return -1; /* EOF */
    }
#else
    rt_device_t device;

    RT_ASSERT(shell != RT_NULL);

    device = shell->device;
    if (device == RT_NULL)
    {
        return -1; /* EOF */
    }

    while (rt_device_read(device, -1, &ch, 1) != 1)
    {
        rt_sem_take(&shell->rx_sem, RT_WAITING_FOREVER);
        if (shell->device != device)
        {
            device = shell->device;
            if (device == RT_NULL)
            {
                return -1;
            }
        }
    }
    return ch;
#endif /* RT_USING_POSIX_STDIO */
#else
    extern signed char rt_hw_console_getchar(void);
    return rt_hw_console_getchar();
#endif /* RT_USING_DEVICE */
}

#if !defined(RT_USING_POSIX_STDIO) && defined(RT_USING_DEVICE)
static rt_err_t finsh_rx_ind(rt_device_t dev, rt_size_t size)