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'[EE]SD Memory on 8-bit controller?'
2009\02\12@040340 by Rich

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Did I notice some talk about SD memory on PIC a while back?  I am working on a Dallas DS87C520 design and I would like to add SD memory.  Has anyone done this?  Did a bit banging routine worl?  I would be interested in any information at all.  

2009\02\12@081719 by solarwind

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On Thu, Feb 12, 2009 at 4:03 AM, Rich <spam_OUTrgrazia1TakeThisOuTspamrochester.rr.com> wrote:
> Did I notice some talk about SD memory on PIC a while back?  I am working on a Dallas DS87C520 design and I would like to add SD memory.  Has anyone done this?  Did a bit banging routine worl?  I would be interested in any information at all.

Yeah, I've found websites where they show you how to do this. SD cards
use an SPI interface, so it's pretty easy to implement.


--
solarwind

2009\02\12@091239 by Jeff Findley

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"Rich" <.....rgrazia1KILLspamspam@spam@rochester.rr.com> wrote in message
news:6033A59250AC4732A8B777DEA417ABB1@RICH1PC...
> Did I notice some talk about SD memory on PIC a while back?
> I am working on a Dallas DS87C520 design and I would like to add
> SD memory.  Has anyone done this?  Did a bit banging routine worl?
> I would be interested in any information at all.

Try Googling "PIC MMC".  That would be a good start.

Jeff
--
"Many things that were acceptable in 1958 are no longer acceptable today.
My own standards have changed too."  -- Freeman Dyson



2009\02\12@131102 by Minto Witteveen

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----- Original Message -----
>From: "Rich" <rgrazia1spamKILLspamrochester.rr.com>
>To: "Microcontroller discussion list - Public." <.....piclistKILLspamspam.....mit.edu>
>Sent: Thursday, February 12, 2009 10:03
>Subject: [EE]SD Memory on 8-bit controller?


> Did I notice some talk about SD memory on PIC a while back?  
>I am working on a Dallas DS87C520 design and I would like to
>add SD memory.  Has anyone done this?  Did a bit banging
>routine worl?  I would be interested in any information at all.  

http://www.captain.at/electronics/pic-mmc/
is a good place to start. Some time ago I did a (hobby) project
with an atmel atmega32 and a micro-sd. (atmel because of
the GCC compiler available). MMC or SD interfacing is quite
simple, just SPI and it sure can be bit-banged.

Regards,

Minto Witteveen.

2009\02\12@140204 by solarwind

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Most PICs come with an SSP module so SPI will run as a hardware
function. No low level software data manipulation is necessary.

2009\02\12@144527 by Brendan Gillatt

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Rich wrote:
> Did I notice some talk about SD memory on PIC a while back?  I am
> working on a Dallas DS87C520 design and I would like to add SD memory.
> Has anyone done this?  Did a bit banging routine worl?  I would be
> interested in any information at all.

http://elm-chan.org/fsw/ff/ffsample.zip contains the most complete SD
implementation I have seen to date (as well as a FAT library).


- --
Brendan Gillatt | GPG Key: 0xBF6A0D94
brendan {a} brendangillatt (dot) co (dot) uk
http://www.brendangillatt.co.uk
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2009\02\12@161033 by Rich

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Thank you, Minto

----- Original Message -----
From: "Minto Witteveen" <EraseMEminto.witteveenspam_OUTspamTakeThisOuTgmail.com>
To: "Microcontroller discussion list - Public." <piclistspamspam_OUTmit.edu>
Sent: Thursday, February 12, 2009 1:10 PM
Subject: Re: [EE]SD Memory on 8-bit controller?


{Quote hidden}

> --

2009\02\12@161446 by Rich

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Minto, that is a great help.  It is what I was looking for; some real
example.  Thanks  again.


----- Original Message -----
From: "Minto Witteveen" <RemoveMEminto.witteveenTakeThisOuTspamgmail.com>
To: "Microcontroller discussion list - Public." <spamBeGonepiclistspamBeGonespammit.edu>
Sent: Thursday, February 12, 2009 1:10 PM
Subject: Re: [EE]SD Memory on 8-bit controller?


{Quote hidden}

> --

2009\02\12@161645 by Rich

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Great, Thank you.

----- Original Message -----
From: "solarwind" <x.solarwind.xEraseMEspam.....gmail.com>
To: "Microcontroller discussion list - Public." <EraseMEpiclistspammit.edu>
Sent: Thursday, February 12, 2009 8:16 AM
Subject: Re: [EE]SD Memory on 8-bit controller?


{Quote hidden}

> --

2009\02\12@163116 by Harold Hallikainen

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> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
>
> Rich wrote:
>> Did I notice some talk about SD memory on PIC a while back?  I am
>> working on a Dallas DS87C520 design and I would like to add SD memory.
>> Has anyone done this?  Did a bit banging routine worl?  I would be
>> interested in any information at all.
>
> http://elm-chan.org/fsw/ff/ffsample.zip contains the most complete SD
> implementation I have seen to date (as well as a FAT library).


For MMC/SD cards, Microchip also has a library that I've used. It works
well in my application. See
www.microchip.com/stellent/idcplg?IdcService=SS_GET_PAGE&nodeId=1824&appnote=en532040
.

Harold


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FCC Rules Updated Daily at http://www.hallikainen.com - Advertising
opportunities available!

2009\02\12@163810 by Minto Witteveen

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From: "Rich" <RemoveMErgrazia1spam_OUTspamKILLspamrochester.rr.com>
> Minto, that is a great help.  It is what I was looking for; some real
> example.  Thanks  again.
>
You're welcome. As I mentioned I used an atmega32 to connect to a
micro-sd. See the link on the page, I used that code to cook something
of my own (added a routine to query the card specifications and some
additional debugging).
If you want I'll email the code and two MMC datasheets to you.
Code is rather "quick and dirty" so I am not _very_ proud of it...

regards,

Minto Witteveen.

2009\02\12@203938 by Rich

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Thank you, Brendan


----- Original Message -----
From: "Brendan Gillatt" <RemoveMEbrendanTakeThisOuTspamspambrendangillatt.co.uk>
To: "Microcontroller discussion list - Public." <EraseMEpiclistspamspamspamBeGonemit.edu>
Sent: Thursday, February 12, 2009 2:45 PM
Subject: Re: [EE]SD Memory on 8-bit controller?


{Quote hidden}

> --

2009\02\12@224121 by Rich

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I am not as efficient with coding as you are so I won't even notice what you
might feel you could have improved. I would appreciate your contribution.  I
did visit the site.  That is the kind of example I wanted.  I am more
comfortable with analog design, power and RF design, switching supplies,
digital logic stuff for instrumentation and measurement.  I do not work as a
design engineer as many on the list do so I am happy to listen in and learn.
Most of my designs in uC have been with BASIC 52 and pin equivalent devices.
I can program in assembly also but I am very much an amateur in C.  I know
more about the MCS51 stuff and all the various flavors of 8 bit but I don't
know much about the SPI interface.  That is another thing I need to learn.
I can see great advantages to SPI.  Some uCs have SPI ports, probably a lot
of Microcip devices do.  The present design is for a measurement system that
could be improved if I could expand the storage.
Thanks again


{Original Message removed}

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