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Altera_Forum's avatar
Altera_Forum
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20 years ago

Compact Flash Basics

Hi All, I have a PCB with a Cyclone EP1C3 fitted. I've made a Nios2 core which includes the CompactFlash Interface (True IDE Mode). All I want to do is write a file onto the flash card when...
Altera_Forum's avatar
Altera_Forum
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20 years ago

The missing piece is a filesystem (FAT filesystem). The example software in the compact-flash support download on this forum gives you "raw" access to the card... not terribly useful for reading in things written by a PC.

Options available:

- google around for some open/free fat filesystem code and port it

- locate the fat spec and write your own

- try eCos -- it includes compact flash drivers, fat file system, networking, etc. Only disadvantage is that it is it is not at all automatically intergrated with the Niso II IDE/HAL/build flow.. it provides all its own. Once you have an eCos library setup and configured how you want it, you can run/debug from the IDE - but its more of a power-user thing currently.

The eCos for Nios II document included with the download also gives the basic steps to get compact flash working.