关于RTT下lwip141初始化的rt_sem_take的疑问

发布于 2014-08-07 08:53:08 浏览：3389 订阅该版

大家好，在rtt上调试lwip的时候碰到点问题，在lwip初始化函数lwip_system_init()里面，有这样一段函数：
```    /* waiting for initialization done */
    if (rt_sem_take(&done_sem, RT_WAITING_FOREVER) != RT_EOK)
    {
        rt_sem_detach(&done_sem);

return -1;
    }
    rt_sem_detach(&done_sem);```
但是lwip_system_init()函数被连接到这里：
``` *(SORT(.rti_fn*))
 .rti_fn.0      0x80236a94        0x4 buildkernelcomponentsinitcomponents.o
                0x80236a94                __rt_init_rti_start
 .rti_fn.1      0x80236a98        0x4 buildspapplicationsoard.o
                0x80236a98                __rt_init_rt_hw_timer_init
 .rti_fn.1      0x80236a9c        0x4 buildspdriversserial.o
                0x80236a9c                __rt_init_rt_hw_serial_init
 .rti_fn.1.post
                0x80236aa0        0x4 buildkernelcomponentsinitcomponents.o
                0x80236aa0                __rt_init_rti_board_end
 .rti_fn.2      0x80236aa4        0x4 buildkernelcomponents
etlwip-1.4.1src
etifethernetif.o
                0x80236aa4                __rt_init_eth_system_device_init
 .rti_fn.3      0x80236aa8        0x4 buildkernelcomponentsfinshshell.o
                0x80236aa8                __rt_init_finsh_system_init
 .rti_fn.3      0x80236aac        0x4 buildkernelcomponents
etlwip-1.4.1srcarchsys_arch.o
                0x80236aac                __rt_init_lwip_system_init
 .rti_fn.7      0x80236ab0        0x4 buildkernelcomponentsinitcomponents.o
                0x80236ab0                __rt_init_rti_end
                0x80236ab4                __rt_init_end = .
                0x80236ab4                __text_end = .
                0x80236ab4                __rodata_start = .```

因此貌似在操作系统启动前这个sem take就会被执行，串口就打印出报错rt_sem_take shall not be used before scheduler start.
那是否我们应该不要export这个函数到components的init列表，而在第一个任务里手动初始化呢？谢谢