AT组件的client客户端在程序中使用之后，后面不在使用，如何关闭，回收所有的资源

发布于 2023-10-11 10:43:09 浏览：546 订阅该版

3 个回答

XinGv 2023-10-17

一日三餐

刚好最近在做AT_COMBO解析，测试了一下自己的销毁函数，程序功能正常。在`at_client.c`增加`int at_client_delete(void)`，程序中调用即可：

```c
int at_client_delete(void)
{
    int idx = 0;

for (idx = 0; idx < AT_CLIENT_NUM_MAX; idx++)
    {
        if(rt_mutex_delete(at_client_table[idx].lock) != RT_EOK)
        {
           LOG_E("at_clinet delete lock failed!");
           return -RT_ERROR;
        }
        if(rt_sem_delete(at_client_table[idx].rx_notice) != RT_EOK)
        {
            LOG_E("at_clinet delete rx_notice failed!");
            return -RT_ERROR;
        }
        if(rt_sem_delete(at_client_table[idx].resp_notice) != RT_EOK)
        {
            LOG_E("at_clinet delete resp_notice failed!");
            return -RT_ERROR;
        }
        if(rt_thread_delete(at_client_table[idx].parser) != RT_EOK)
        {
            LOG_E("at_clinet delete at_thread failed!");
            return -RT_ERROR;
        }
        if(rt_device_close(at_client_table[idx].device)!= RT_EOK)
        {
            LOG_E("at_clinet close uart failed!");
            return -RT_ERROR;
        }
    }

rt_memset(at_client_table, 0x00, sizeof(struct at_client) * AT_CLIENT_NUM_MAX);

return RT_EOK;
}
```
验证结果如下图：at_clinet创建出来的线程、信号量和占用的串口设备都释放出来了

![360截图18141223161227.png](https://oss-club.rt-thread.org/uploads/20231017/9c1973da78b97fd5192009dd0740b03a.png)