low power mode and fatfs shutdown

RE: low power mode and fatfs shutdown

Hakon — Tue, 22 Oct 2019 09:18:20 GMT

Sorry about the delayed answer.

Valid sequence, which client should use:

f_close() -> disk_uninitialize() -> optional SD supply shutdown.

RE: low power mode and fatfs shutdown

OwainIncus — Mon, 23 Sep 2019 09:44:28 GMT

I think you can ummount filesystems using the f_mount() call like....

//Ensure no mounted drives
(void)f_mount(NULL, "0", 1);
(void)f_mount(NULL, "1", 1);

We use this in our factory reset routine before partitioning with f_disk(), and making filesystems with f_mkfs() and finally labelling with f_setlabel().

Its just I am used to using disks etc under an OS; where disk management is taking place in the background; you would sync/flush filesystems and unmount. On return from the unmount you know all housekeeping has been done in the background and the filesystems are intact.

RE: low power mode and fatfs shutdown

Hakon — Fri, 20 Sep 2019 13:47:09 GMT

[quote user=""]But what is correct sequence to gracefully shutdown the filesystems and this sub-system?[/quote]

app_sdc_uninit() seems like a reasonable way to uninit the peripherals, and for unmounting the filesystems I think you can use the f_close() function in the fatfs API. I don't think the filesystem is taken care of in app_sdc_uninit().