[E/app.filesystem] SD card mount to '/sdcard' failed!

发布于 2025-02-05 16:53:12 浏览：13 订阅该版

RT-Thread 版本V4.1.1 ，基于 bsp/stm32/stm32f407-atk-explorer 测试。
SD卡挂载，报错提示：

```
[E/app.filesystem] SD card mount to '/sdcard' failed!
```

![微信截图_20250205154512.png](https://oss-club.rt-thread.org/uploads/20250205/5e12d95d1a4392d39e55fb485cf901c0.png.webp)

配置如下：

![微信截图_20250205154344.png](https://oss-club.rt-thread.org/uploads/20250205/5060a57600a5080cab5db236f310799e.png.webp)

查看源码：

![微信截图_20250205154257.png](https://oss-club.rt-thread.org/uploads/20250205/6457476d66b28a01a01aa34f7a1e48d9.png.webp)

问题产生的原因：
自动挂载时，sd0 设备还未注册。

解决办法：
修改代码如下
```
#ifdef BSP_USING_SDCARD_FATFS
static int onboard_sdcard_mount(void)
{
int result=0;
while(rt_device_find("sd0") == RT_NULL)
{
rt_thread_mdelay(1000);
}
if (dfs_mount("sd0", "/sdcard", "elm", 0, 0) == RT_EOK)
{
LOG_I("SD card mount to '/sdcard'");
}
else
{
result = dfs_mkfs("elm", "sd0");
if (result == RT_EOK)
{
result = dfs_mount("sd0", "/sdcard", "elm", 0, 0);
}
else
{
LOG_E("SD card mount to '/sdcard' failed!");
return -RT_ERROR;
}
rt_kprintf("Mount elm on sd successfully\n");
}
return RT_EOK;
}
#endif /* BSP_USING_SDCARD_FATFS */
```

测试：

![微信截图_20250205154524.png](https://oss-club.rt-thread.org/uploads/20250205/c34da661b594ae1528c0b4e034c8eb80.png.webp)