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Altera_Forum's avatar
Altera_Forum
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15 years ago

USB Mass storage without uClinux

Hi, I develop on DE2-70 board. My project use an usb key to store any data. For now, I use uClinux. But I want to remove it, and develop directly on nios2. I only found FAT implementatio...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

You will need to find a USB protocol stack - these are usualy large and complicated beasts!

Once you've got that you'll be able to do sector read/write and then the FAT filesystem is trivial.

I've not done an SD card driver, but I suspect it is a simple (well relatively simple) interface rather like the ATA disk one - so suitable for a simple PIO + interrupt driver.