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polyfs

Created by: Olivér Pirger
5 devlogs
13h 19m 53s

Async embedded Rust crate for working with FAT filesystems on SD cards. It even works on regular computers with a RAM disk implementation.

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Olivér Pirger
Olivér Pirger worked on polyfs
8 days ago
2h 2m logged
  • refactored the opening API
  • a new unified open function is now available: open folder or file using just its path
  • added crate-level documentation and README, published to crates.io
  • cleaned up code to get rid of warnings when compiling
  • changed crate name because I can
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Olivér Pirger
Olivér Pirger 8 days ago

You can try the project by adding an MBR formatted disk.img file in the “tests” directory. Create a FAT32 partition on it and add some files. You can tweak read.rs and mount.rs test files to do cool stuff with it!!

Olivér Pirger
Olivér Pirger worked on polyfs
26 days ago
1h 43m logged

After hours of work, I finally got a real SD card working over SPI. On the screenshot you can see it reading the first sector (the Master Boot Record) of a real microSDHC card.

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Olivér Pirger
Olivér Pirger worked on polyfs
27 days ago
1h 44m logged

I’m so back!

Today I added file reading, API compatible with embedded-io-async. sd-fat now reads whole files with .read_exact(). Also did a bit of cleanup around the project and updated dependencies.

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Olivér Pirger
Olivér Pirger worked on polyfs
3 months ago
0h 53m logged

What I did today:

  • directory traversal is complete: open directories by path
  • find entries in a directory by name
  • cleaned up the internal and public APIs for cleaner code overall
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Olivér Pirger
Olivér Pirger worked on polyfs
3 months ago
6h 56m logged

Started the project. Here are a few things that are already working:

  • Implemented a RAM based disk “emulator” for testing: loads .img files
  • Parse MBR, find partition
  • Parse BPB, find root directory
  • List entries in any directory by cluster number
  • An extensible API for future expansion: more file systems, partition tables, and block device implementations
  • All this without using the standard library and a heap allocator
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