Synth-DIY Yahoo! Groups Archives

Thread

Fat16/32 info for AVR->compact flash

2004-07-12 by Craig Limber

Hi there;

I am considering embarking on a new AVR project: an MP3 player.  I was
thinking of basing it on the yampp mp3 player ( http://www.yampp.com )
but somewhat modified.  One of the mods I want to do is use a "normal"
filesystem on the CF card to make it easier to move the files around
instead of yadl (Yampp Advanced Disk Layout).  What I was wondering is
if there were any stores of freely available AVR fat16/32 C source code
I can check out to learn how to do it.  

I figure that with building my own MP3 player I can actually get one
that works the way I like!

Craig

Re: [AVR-Chat] Fat16/32 info for AVR->compact flash

2004-07-12 by Jesper Hansen

Craig,

Look a little closer, there's some old FAT32 code on my site.

/Jesper

----- Original Message -----

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From: "Craig Limber" <ffdude@shaw.ca>
To: <avr-chat@yahoogroups.com>
Sent: Monday, July 12, 2004 8:36 PM
Subject: [AVR-Chat] Fat16/32 info for AVR->compact flash


> 
> Hi there;
> 
> I am considering embarking on a new AVR project: an MP3 player.  I was
> thinking of basing it on the yampp mp3 player ( http://www.yampp.com )
> but somewhat modified.  One of the mods I want to do is use a "normal"
> filesystem on the CF card to make it easier to move the files around
> instead of yadl (Yampp Advanced Disk Layout).  What I was wondering is
> if there were any stores of freely available AVR fat16/32 C source code
> I can check out to learn how to do it.  
> 
> I figure that with building my own MP3 player I can actually get one
> that works the way I like!
> 
> Craig
> 
> 
> 
>  
> Yahoo! Groups Links
> 
> 
> 
>  
>

Re: Fat16/32 info for AVR->compact flash

2004-07-13 by Dave Mucha

--- In AVR-Chat@yahoogroups.com, Craig Limber <ffdude@s...> wrote:
> 
> Hi there;
> 
> I am considering embarking on a new AVR project: an MP3 player.  I 
was
> thinking of basing it on the yampp mp3 player ( 
http://www.yampp.com )
> but somewhat modified.  One of the mods I want to do is use 
a "normal"
> filesystem on the CF card to make it easier to move the files around
> instead of yadl (Yampp Advanced Disk Layout).  What I was wondering 
is
> if there were any stores of freely available AVR fat16/32 C source 
code
> I can check out to learn how to do it.  
> 
> I figure that with building my own MP3 player I can actually get one
> that works the way I like!
> 
> Craig



Hi Craig,

Why did you chose the compac flash over the other memory devices ?

I did some investigating of the USB keyring storage devices and also 
the MMC and SD cards.  the MMC seemded to be easier due to it's 
internal interupter.

Dave

Re: [AVR-Chat] Re: Fat16/32 info for AVR->compact flash

2004-07-13 by Jesper Hansen

Did you also look at the capacities and prices, Dave ?   ;-)

/Jesper

----- Original Message -----

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From: "Dave Mucha" <dave_mucha@yahoo.com>
To: <AVR-Chat@yahoogroups.com>
Sent: Tuesday, July 13, 2004 7:43 PM
Subject: [AVR-Chat] Re: Fat16/32 info for AVR->compact flash


> --- In AVR-Chat@yahoogroups.com, Craig Limber <ffdude@s...> wrote:
> > 
> > Hi there;
> > 
> > I am considering embarking on a new AVR project: an MP3 player.  I 
> was
> > thinking of basing it on the yampp mp3 player ( 
> http://www.yampp.com )
> > but somewhat modified.  One of the mods I want to do is use 
> a "normal"
> > filesystem on the CF card to make it easier to move the files around
> > instead of yadl (Yampp Advanced Disk Layout).  What I was wondering 
> is
> > if there were any stores of freely available AVR fat16/32 C source 
> code
> > I can check out to learn how to do it.  
> > 
> > I figure that with building my own MP3 player I can actually get one
> > that works the way I like!
> > 
> > Craig
> 
> 
> 
> Hi Craig,
> 
> Why did you chose the compac flash over the other memory devices ?
> 
> I did some investigating of the USB keyring storage devices and also 
> the MMC and SD cards.  the MMC seemded to be easier due to it's 
> internal interupter.
> 
> Dave
> 
> 
> 
> 
> 
> 
>  
> Yahoo! Groups Links
> 
> 
> 
>  
>

RE: [AVR-Chat] Fat16/32 info for AVR->compact flash

2004-07-13 by joseph torelli

I recently purchased a "ATA Hard Drive Controller" for www.edtp.com. And a
IDE to Compact Flash Adapter.
I use Bascom that includes AVR-DOS library. I just got every thing connected
and used the software on the
site and I am reading and writing files to a CF card and I can plug it into
my PC and I can read them there also.
More links that helped me:
http://members.home.nl/bzijlstra/software/examples/basex.htm
http://members.home.nl/bzijlstra/hardware/hardware.htm
http://members.aon.at/voegel/index.html

There is also info on using it in memory mode
http://www.mcselec.com/an_123.htm with Bascom.

Joe Torelli
VP Dev
Momark Products Inc.
Mansfield, Texas

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-----Original Message-----
From: Craig Limber [mailto:ffdude@shaw.ca]
Sent: Monday, July 12, 2004 1:36 PM
To: avr-chat@yahoogroups.com
Subject: [AVR-Chat] Fat16/32 info for AVR->compact flash

Hi there;

I am considering embarking on a new AVR project: an MP3 player.  I was
thinking of basing it on the yampp mp3 player ( http://www.yampp.com )
but somewhat modified.  One of the mods I want to do is use a "normal"
filesystem on the CF card to make it easier to move the files around
instead of yadl (Yampp Advanced Disk Layout).  What I was wondering is
if there were any stores of freely available AVR fat16/32 C source code
I can check out to learn how to do it.

I figure that with building my own MP3 player I can actually get one
that works the way I like!

Craig

Yahoo! Groups Links

Re: Fat16/32 info for AVR->compact flash

2004-07-14 by Dave Mucha

--- In AVR-Chat@yahoogroups.com, "Jesper Hansen" <jesperh@t...> wrote:
> 
> Did you also look at the capacities and prices, Dave ?   ;-)

Compac Flas is 256 meg for about $40.00 and the MMC is 256 meg for 
about $50.00  

the MMC only has about 6 pins for data while the CF requires 
considderably more lines.

The MMC and SD (Secure Digital) cards share the same form factor, but 
as I understand the SD cards are eclipsing the MMC cards.  A price 
check shows the SD 256meg for about $43.00 so is really close to the 
CF cards.

I guess the reason I was looking at the MMC/SD stuff was the small 
pin count and the large spacing for the pins.  the CF pins were too 
close together for my abilities to make a home brew board.

But, it looks like IBM ported their hard disk into the CF form so 
gigbytes will be available.

Dave

Re: [AVR-Chat] Re: Fat16/32 info for AVR->compact flash

2004-07-14 by jayabox02@yahoo.com.sg

----- Original Message -----

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From: "Jesper Hansen" <jesperh@telia.com>
To: <AVR-Chat@yahoogroups.com>
Sent: Wednesday, July 14, 2004 2:12 AM
Subject: Re: [AVR-Chat] Re: Fat16/32 info for AVR->compact flash


> 
> Did you also look at the capacities and prices, Dave ?   ;-)
> 
> /Jesper
> 
> ----- Original Message ----- 
> From: "Dave Mucha" <dave_mucha@yahoo.com>
> To: <AVR-Chat@yahoogroups.com>
> Sent: Tuesday, July 13, 2004 7:43 PM
> Subject: [AVR-Chat] Re: Fat16/32 info for AVR->compact flash
> 
> 
> > --- In AVR-Chat@yahoogroups.com, Craig Limber <ffdude@s...> wrote:
> > > 
> > > Hi there;
> > > 
> > > I am considering embarking on a new AVR project: an MP3 player.  I 
> > was
> > > thinking of basing it on the yampp mp3 player ( 
> > http://www.yampp.com )
> > > but somewhat modified.  One of the mods I want to do is use 
> > a "normal"
> > > filesystem on the CF card to make it easier to move the files around
> > > instead of yadl (Yampp Advanced Disk Layout).  What I was wondering 
> > is
> > > if there were any stores of freely available AVR fat16/32 C source 
> > code
> > > I can check out to learn how to do it.  
> > > 
> > > I figure that with building my own MP3 player I can actually get one
> > > that works the way I like!
> > > 
> > > Craig
> > 
> > 
> > 
> > Hi Craig,
> > 
> > Why did you chose the compac flash over the other memory devices ?
> > 
> > I did some investigating of the USB keyring storage devices and also 
> > the MMC and SD cards.  the MMC seemded to be easier due to it's 
> > internal interupter.
> > 
> > Dave
> > 
> > 
> > 
> > 
> > 
> > 
> >  
> > Yahoo! Groups Links
> > 
> > 
> > 
> >  
> > 
> 
> 
> 
> 
>  
> Yahoo! Groups Links
> 
> 
> 
>  
>

Re: Fat16/32 info for AVR->compact flash

2004-07-15 by avrcard

Hi Craig,

You will find an example of an IDE harddisk based player here: 
http://www.avrcard.com/showcase/mp3player.htm.
The code could be instructive as to the FAT file system, and 
accessing the CF through the IDE interface should be straightforward.
The FAT32 specs can be found here: 
http://www.microsoft.com/whdc/system/platform/firmware/fatgen.mspx
This could help understand the various code examples.

Regards,
Hans

RE: [AVR-Chat] Re: Fat16/32 info for AVR->compact flash

2004-07-15 by Brian Fairchild

As I understand it MMC cards use an SPI interface on a 7-pin connector.
SD cards have a couple of additional contacts and have a 4-bit wide
interface. Do SD cards support the SPI mode of operation?
 
Brian

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-----Original Message-----
From: Dave Mucha [mailto:dave_mucha@yahoo.com] 
Sent: 14 July 2004 04:42
To: AVR-Chat@yahoogroups.com
Subject: [AVR-Chat] Re: Fat16/32 info for AVR->compact flash

--- In AVR-Chat@yahoogroups.com, "Jesper Hansen" <jesperh@t...> wrote:
> 
> Did you also look at the capacities and prices, Dave ?   ;-)

Compac Flas is 256 meg for about $40.00 and the MMC is 256 meg for 
about $50.00  

the MMC only has about 6 pins for data while the CF requires 
considderably more lines.

The MMC and SD (Secure Digital) cards share the same form factor, but 
as I understand the SD cards are eclipsing the MMC cards.  A price 
check shows the SD 256meg for about $43.00 so is really close to the 
CF cards.

I guess the reason I was looking at the MMC/SD stuff was the small 
pin count and the large spacing for the pins.  the CF pins were too 
close together for my abilities to make a home brew board.

But, it looks like IBM ported their hard disk into the CF form so 
gigbytes will be available.