5 程序中有没有接口去让finsh调用函数

发布于 2022-03-23 17:12:22 浏览：720 订阅该版

2 个回答

crystal266 2022-12-09

嵌入式

看源码 cmd.c 中，可以直接在代码中调用 `list_device();` 函数就就相当于在控制行执行了该命令。
类似的还可以在文件 msh.c 中找到 `cmd_ps();` 和 `cmd_free()` 等。

```c
long list_device(void)
{
    rt_base_t level;
    list_get_next_t find_arg;
    rt_list_t *obj_list[LIST_FIND_OBJ_NR];
    rt_list_t *next = (rt_list_t *)RT_NULL;
    const char *device_type;

int maxlen;
    const char *item_title = "device";

list_find_init(&find_arg, RT_Object_Class_Device, obj_list, sizeof(obj_list) / sizeof(obj_list[0]));

maxlen = RT_NAME_MAX;

rt_kprintf("%-*.s         type         ref count\n", maxlen, item_title);
    object_split(maxlen);
    rt_kprintf(" -------------------- ----------\n");
    do
    {
        next = list_get_next(next, &find_arg);
        {
            int i;
            for (i = 0; i < find_arg.nr_out; i++)
            {
                struct rt_object *obj;
                struct rt_device *device;

obj = rt_list_entry(obj_list[i], struct rt_object, list);
                level = rt_hw_interrupt_disable();
                if ((obj->type & ~RT_Object_Class_Static) != find_arg.type)
                {
                    rt_hw_interrupt_enable(level);
                    continue;
                }

rt_hw_interrupt_enable(level);

device = (struct rt_device *)obj;
                device_type = "Unknown";
                if (device->type < RT_Device_Class_Unknown &&
                    device_type_str[device->type] != RT_NULL)
                {
                    device_type = device_type_str[device->type];
                }
                rt_kprintf("%-*.*s %-20s %-8d\n",
                           maxlen, RT_NAME_MAX,
                           device->parent.name,
                           device_type,
                           device->ref_count);

}
        }
    }
    while (next != (rt_list_t *)RT_NULL);

return 0;
}
MSH_CMD_EXPORT(list_device, list device in system);
#endif

int cmd_list(int argc, char **argv)
{
    if(argc == 2)
    {
        if(strcmp(argv[1], "thread") == 0)
        {
            list_thread();
        }
        else if(strcmp(argv[1], "timer") == 0)
        {
            list_timer();
        }
#ifdef RT_USING_SEMAPHORE
        else if(strcmp(argv[1], "sem") == 0)
        {
            list_sem();
        }
#endif /* RT_USING_SEMAPHORE */
#ifdef RT_USING_EVENT
        else if(strcmp(argv[1], "event") == 0)
        {
            list_event();
        }
#endif /* RT_USING_EVENT */
#ifdef RT_USING_MUTEX
        else if(strcmp(argv[1], "mutex") == 0)
        {
            list_mutex();
        }
#endif /* RT_USING_MUTEX */
#ifdef RT_USING_MAILBOX
        else if(strcmp(argv[1], "mailbox") == 0)
        {
            list_mailbox();
        }
#endif  /* RT_USING_MAILBOX */
#ifdef RT_USING_MESSAGEQUEUE
        else if(strcmp(argv[1], "msgqueue") == 0)
        {
            list_msgqueue();
        }
#endif /* RT_USING_MESSAGEQUEUE */
#ifdef RT_USING_MEMPOOL
        else if(strcmp(argv[1], "mempool") == 0)
        {
            list_mempool();
        }
#endif /* RT_USING_MEMPOOL */
#ifdef RT_USING_DEVICE
        else if(strcmp(argv[1], "device") == 0)
        {
            list_device();
        }
#endif /* RT_USING_DEVICE */
#ifdef RT_USING_DFS
        else if(strcmp(argv[1], "fd") == 0)
        {
            extern int list_fd(void);
            list_fd();
        }
#endif /* RT_USING_DFS */
        else
        {
            goto _usage;
        }

return 0;
    }

_usage:
    rt_kprintf("Usage: list [options]\n");
    rt_kprintf("[options]:\n");
    rt_kprintf("    thread - list threads\n");
    rt_kprintf("    timer - list timers\n");
#ifdef RT_USING_SEMAPHORE
    rt_kprintf("    sem - list semaphores\n");
#endif /* RT_USING_SEMAPHORE */
#ifdef RT_USING_MUTEX
    rt_kprintf("    mutex - list mutexs\n");
#endif /* RT_USING_MUTEX */
#ifdef RT_USING_EVENT
    rt_kprintf("    event - list events\n");
#endif /* RT_USING_EVENT */
#ifdef RT_USING_MAILBOX
    rt_kprintf("    mailbox - list mailboxs\n");
#endif /* RT_USING_MAILBOX */
#ifdef RT_USING_MESSAGEQUEUE
    rt_kprintf("    msgqueue - list message queues\n");
#endif /* RT_USING_MESSAGEQUEUE */
#ifdef RT_USING_MEMPOOL
    rt_kprintf("    mempool - list memory pools\n");
#endif /* RT_USING_MEMPOOL */
#ifdef RT_USING_DEVICE
    rt_kprintf("    device - list devices\n");
#endif /* RT_USING_DEVICE */
#ifdef RT_USING_DFS
    rt_kprintf("    fd - list file descriptors\n");
#endif /* RT_USING_DFS */

return 0;
}
MSH_CMD_EXPORT_ALIAS(cmd_list, list, list objects);
```