This proyect is a simple implementation of a driver for FAT16/32 file systems.

Files can be read in user selectable data chunk sizes that must be multiples of 2. For example, data can be obtained in buffers of 1, 2, 4, 8, 16, 32, 64, 128, 256 and 512 bytes. The maximum buffer size allowed is 512 bytes. Any other buffer size will produce junk data or may cause an infinite loop in the program flow.

I’m 100% sure this driver implementation is not bug free, so if you find something that could be a bug, please let me know. If you are good enough to solve it for your own, please don’t forget to share the resulting code with me, so others could benefit from it. Also, I’m sure that the code can be optimized to get better performance and/or a lower footprint. If you make any change to the code, the same sharing policies mentioned before apply.

This code is provided as is with no warranty at all. Use this code at your own risk.

The code provided is FREE FOR PERSONAL USE. If you need to use it for commercial purposes please contact me in order to make some agreement.

If you make some cool projects using this code, please let me know to mention it on the web site. Thanks!

If you want to know more details of FAT32 file systems, please refer to the article “Understanding FAT32 Filesystems” by Paul Stoffregen.

The article can be found at http://www.pjrc.com/tech/8051/ide/fat32.html

Downloads:

As of March 10th, 2010 the FAT library/driver has been renamed to nanoFAT-lib and its source code is available through Google Code at http://code.google.com/p/nanofat-lib/. Feel free to visit the main project’s page for more information.