5 Module Memory Usage and Configuration

The size of the Petit FatFS module when compiled using AVR-GCC varies between 1 kB-4 kB depending on configuration and optimization settings used. The table below shows example compile sizes with different configuration options, using Atmel Studio 7.0 with optimization for size. Default configuration is with _USE_READ and _FS_FAT16 enabled, and all other options disabled. These approximations are for the Petit FatFs module only, and does not include the disk I/O layer.

Configuration can be customized according to what functions are required by the application. The following table shows which functions are removed for each configuration option, contained in the configuration header file (pffconf.h).