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Getting started with FAT Filesystem on SD/MMC cards over SPI
- Date: Thu, 11 Sep 2008 16:32:13 -0400
- From: gds at chartertn.net (Gene Smith)
- Subject: Getting started with FAT Filesystem on SD/MMC cards over SPI
What you are talking about here my h/w does and it is something I need
to do too. However, at this point I don't have a clue how. So a "HowTo"
would be most appreciated and I could contribute what I learn.
All I have worked with is the IMFS in a simple way.
Robert S. Grimes wrote:
> My hardware provides support for SD/MMC flash cards over SPI, so now I
> need to implement suitable drivers for this. Because it would need to
> be read by Windows machines, and because it is sufficient for my
> application, it seems the dosfs is the way to go.
> I've got a low level SPI driver for my BSP (powerpc/virtex under RTEMS
> 4.8), and I've written some chip drivers on top of that, so I'm
> comfortable with the SPI level.
> But where do I go from here?
> 1. How do I "include" the dosfs in my application? Is it a matter of
> #define CONFIGURE_ macros, and if so, which? (As an aside, is
> there one central place where all these macros are defined? If
> so, I haven't found it...)
> 2. How do I get dosfs to work via the SPI bus? What must my driver
> look like?
> Any pointers or roadmap well appreciated - TIA
> P.S. Sounds like a request for a "HowTo" on my part - I'd be happy to
> write one for the Wiki...