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Flash Drive USB Interface

T

Tunarle

Junior Member
Here's what I'm trying to do for a class. I need to understand how to retrieve information from a usb flash drive without a computer. I'm trying to design a circuit that would be able to request a file from a flash drive, move to the next file in the present working directory, or move up or down a directory. Obviously this is somehow possible if a computer can do it, but I can't find any information out there (probably because I suck as searching).

Can someone point me to where I might be able to find information about accessing the data stored on a flash drive using a usb interface. I've already designed my own USB transceiver using USB 1.1 standards, that was easy because I found plenty of documentation, but I can't find anything about accessing a flash drive.

Any help would be appreciated. Hopefully what I've said made some sense.

Thank You
 
You'll need to implement the multiple layers of the USB protocol stack. You got the physical layer, now you need to implement software/firmware for the transport layer, and on top of that implement USB mass storage device protocol, and on top of that implement a FAT file system client.

In other words, you'll either use a computer or invent one.
 
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