USB mass storage

Rayk · Guest

Hello, for a new project i need the USB mass storage driver protocol in a PIC, but i can't find something in the web. Can someone help me?
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This message was ported from CCS's old forum
Original Post ID: 144515027

alexz · Joined: 17 Sep 2004 Posts: 133 Location: UK

Darren Rook · Joined: 06 Sep 2003 Posts: 287 Location: Milwaukee, WI

This will require you to do two things. First, implement a FAT16 file system that is compatable with Windows (or whatever operating system you are using). Second, take a USB stack and if it doesn't have the mass storage class you will have to add it yourself. (The only class CCS's simple stack provides "out of the box" is HID)

You may be able to find a USB stack for free online somewhere, but I would bet money that you will not find a free embedded implementation of a FAT16 file system.

In conclusion, a good chunk of work which I'd be surprised if someone was just giving away. On second thought, I have seen a lot of homegrown MP3 players with schematics and firmware - do a search and see if you can steal some code from there.

lucky · Posted: Mon Jan 10, 2005 6:31 am

Try www.mpic3.com. Look in the downloads area for the MPic3 (MP3) player code. This has my simple FAT16 PIC code written in CCS C. I only use reads from a Compact Flash but it would be quite easy to add writes as the FAT16 side of thing will be 90% the same. The CF I read from is written to using Windows. It works well as a work in progress MP3 player so could be a good starting point for you guys.
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Lucky
www.mpic3.com - MPIC3 player project, Forum, Downloads, Online Shop

treitmey · Joined: 23 Jan 2004 Posts: 1094 Location: Appleton,WI USA

Ray/Alex, If you guys get a fat16 code working, post the results in the code library, if you can. I'm sure this will be used more and more as chips are getting bigger.

Guest · Posted: Mon Jan 10, 2005 9:39 am

treitmey · Joined: 23 Jan 2004 Posts: 1094 Location: Appleton,WI USA

http://www.ccsinfo.com/forum/viewforum.php?f=2

Darren Rook · Joined: 06 Sep 2003 Posts: 287 Location: Milwaukee, WI

Instead of posting what is probably lots of code in the forum, it would probably be easier to just post a URL of the FAT16 code in the code library. It's your decision though.