10 STOP模式休眠唤醒后，如何恢复spi挂载的文件系统

发布于 2025-04-23 15:05:26 浏览：35 订阅该版

下面挂的代码是我用norflash挂载的dfs
现在我的设备用到了低功耗 唤醒后 dfs不能读写文件 
请问我在休眠前如何deinit spi和dfs  以及 唤醒后 如何reinit spi和dfs 
休眠用的是stop模式的WFI
```c
int rt_filesystem_mount_init(void)
{
     /* spi挂载 */
    rt_hw_spi_device_attach("spi3", "spi30", GPIOC, GPIO_PIN_2);// spi30 是 spi3 的 0 号设备,PA15 NSS
 
    if (RT_NULL == rt_sfud_flash_probe("W25Q80", "spi30"))  
    {
        rt_kprintf("rt_sfud_flash_probe: NULL\n");
        return -1;
    }
    else
    {
        rt_kprintf("rt_sfud_flash_probe: success\n");
        //挂载文件系统到根目录
        int err = dfs_mount("W25Q80", "/", "elm", 0, 0);
        if(err == 0)
        {
            rt_kprintf("dfs mount success\n");
            LoadAppConfigFromJson();
            LoadNetworkConfigFromExStorage();
            return 0;
        }
        else
        {
            rt_kprintf("dfs mount failed:%d, %d\n", err, rt_get_errno());
            rt_kprintf("remake file system\n");
            
            dfs_mkfs("elm","W25Q80");
            int err = dfs_mount("W25Q80", "/", "elm", 0, 0);
            if(err == 0)
            {
                rt_kprintf("dfs mount success\n");
                return 0;
            }
            else
            {
                //mkfs -t elm W25Q80
                rt_kprintf("dfs mount failed:%d, %d\n", err, rt_get_errno());
                return -1;
            }
        }
    }
}
```