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I have found many neat uses for my Ultra and find the capabilities quite rich and the device very easy to use and configure. Thank you!

I do have a couple suggestions around file management. Perhaps either one is already implemented and I just missed it?

1. In the dialogs where filenames are displayed, it appears files are sorted by file creation date. I find in most cases, for me anyway, a sort by name would be much preferred. My next preferred sort would be reverse by modification date (most recently modified first).

2. Additionally, it would be great if there were a way to rename files (directly, not by connecting a PC or other device).

As a thought to solve both of these, two control buttons could be added to the "Preset / Load SD" page:

1. One on the left-bottom corner to the right of the DEL control labeled REN for REName. This would permit selection of a file followed by the file naming dialog.
2. One on the right-bottom corner to the left of the X control labeled SRT for SoRT. This would toggle the file sort order between whatever options are permitted (preference being name, modification date, creation date). Bonus points if sort order saved across boots.

Peter

Github issues #99 and #100 created.

Peter,
Sorting the file names is not possible due to limited memory.
Will look into renaming
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@Erik
I would think an in-place sort wouldn't use any extra memory. Bubble-sort for instance is very easy to implement, if not the best performance.

I don't know anything about this firmware or the structures used so maybe there is some other limitation that makes simple sorting not possible? If so maybe that's another area that could be optimized. Is any of this code available to look at? Maybe from the NanoVNA?

In the wiki you can find the link to the github repository with the code.
Feel free to study how the file names are read from the SD card and displayed on the screen
Any proposal for some way to sort without loading all file names in memory is most welcome.
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TinySA contain only 48k RAM, for all

I add file browser option in NanoVNA and Tiny. For all I use 4k RAM, shared vs LCD buffer (for all, include read buffers, FAT cache, and small text draw buffer)
Also limits in code size.
For sorting need load all filenames (if use short names 8 byte for file, for long name up to 255 bytes)

Interesting how possible sort something and not load in memory, sort operation mean swap objects, lot of swaps. There store sort results?

PS?adding a file browser even in this form, given the resource limitations, was quite a non-trivial task.

@DiSlord
Guess the file rename should be possible?
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@ctech, Here is a link to the source on Github. If you find a way to do sorting within the TinySA memory limits, please submit a pull request.

https://github.com/erikkaashoek/tinySA

I was not actually expecting a programmatic resort and had assumed the underlying core SD i/o would support directory file listing with multiple sort options (like filename, create date, modify date) so the list of filenames could just be retrieved again in the desired order. Appears my assumption was wrong.

Peter

Guess the file rename should be possible?

Yes, rename possible
I think add "Name" button like "DEL", after enable it, next click on filename - call text input dialog for enter name and after rename it if ok (but leave file extension)
need use?f_rename(old, new) function
Add use this function increase code size

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