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'[EE]:Implementing a mp3 player, reading fat format'
2000\11\24@185608 by George Chatzigeorgiou

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I'm starting a project of an portable mp3 player. Data will come from an ordinary hard disk. Does anyone know if there is a ata/atapi controller around;;; I tried at ti and st but i only found system on a chip designs, and some 1394 to atapi controllers. Any help would be thankful.

George Chatzigeorgiou
UnderGraduate Student in Electrical Enginnering , NTUA, Athens, Greece

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2000\11\25@214501 by James Newton

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I'm going to have to add a FAQ at piclist.com for this...

...we get it what? once a week?

The hard drive interface to a PIC hasn't been done, somebody was offering a
prize... (Who was it again?) It has been done with many other processors.
Details at
http://www.piclist.com/../drives.htm
including the FAT format, sample code, and circuits, etc...

The FAQ will also need... ahh....

"No one has been able to decode any MP3 data with a PIC in real time and you
probably can't (also, why would you want to as there are chips that are much
better for this)"

Does that sound like enough?

James Newton, PICList Admin #3
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1-619-652-0593 phone
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{Original Message removed}

2000\11\26@020409 by David Lions

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----- Original Message -----
From: "James Newton" <.....jamesnewtonKILLspamspam@spam@PICLIST.COM>
To: <PICLISTspamKILLspamMITVMA.MIT.EDU>
Sent: Sunday, November 26, 2000 1:29 PM
Subject: Re: [EE]:Implementing a mp3 player, reading fat formatted disks


> I'm going to have to add a FAQ at piclist.com for this...
>
> ...we get it what? once a week?
>
> The hard drive interface to a PIC hasn't been done,

I've done it!  That is, the following functions:
init()
IDE_ReadData()
IDE_WriteData()
IDE_Command(command)
IDE_ReadReg(reg)
IDE_WriteReg(reg, data)
unsigned char IDE_Status()

They are little more than I/O commands.  You also need to know what commands
to give, when to give them, and what to expect in reply.  You have to read
the IDE-to-8255 article for that.  I use 16F877.  Direct connect, 16 bit, no
external latches.

I also have a DAC connected, and am perfecting Record and Playback routines.
(My project is a digital answering machine)

> somebody was offering a
> prize... (Who was it again?)

Andy Kunz

>It has been done with many other processors.
> Details at
> http://www.piclist.com/../drives.htm
> including the FAT format, sample code, and circuits, etc...
>
> The FAQ will also need... ahh....
>

Lots of info, or links to info, about character LCD displays with Hitachi
44780 controller!  ;)

> "No one has been able to decode any MP3 data with a PIC in real time and
you
> probably can't (also, why would you want to as there are chips that are
much
{Quote hidden}

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2000\11\26@120253 by James Newton

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Congratulations on your work, are you planning on GPLing it? Have you
contacted Andy? Are you writing the rest of the code?

BTW: The PIC FAQ already has a ton of links and code for LCD displays.

James Newton, PICList Admin #3
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{Original Message removed}

2000\11\26@145553 by David Lions

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I'll get a simple FAT working first.  If anyone is interested they can see
what I have so far.  My Record and Playback functions also work now, which
read and write at 8kHz (for a 4kHz BW telephone application).

{Original Message removed}

2000\11\26@153354 by James Newton

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In all the time I've been on the PICList, I don't ever remember a time with
at least some members were interested in a bit of code someone had written.
Wondering if the PICList is interested in code is a waste of wondering. In
other words...

Please post what you have! <GRIN>

Let me know if the FAT documentation at piclist.com helps
www.piclist.com/techref/default.asp?url=DOS/filesys.htm
and if you have any other resouces for that.

James Newton, PICList Admin #3
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1-619-652-0593 phone
http://www.piclist.com


{Original Message removed}

2000\11\26@155022 by Randy Glenn

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I didn't see this on the filesystems page:

http://209.67.75.168/hardware/fatgen.htm

Microsoft's FAT32 standard. Explains differences between FAT32/16/12, so you
could probably get a working FAT12/16 implementation out of this document,
too.

Geez, with this many MP3 project questions, maybe an [MP3]: tag should be
added...

-Randy Glenn

Randy_Glenn-at-tvo.org - PICxpert-at-home.com
PICxpert-at-yahoo.com - PICxpert-at-picxpert.com
           http://www.picxpert.com/

{Original Message removed}

2000\11\27@025353 by Vasile Surducan

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On Sun, 26 Nov 2000, David Lions wrote:
> > The hard drive interface to a PIC hasn't been done,
>
> I've done it!  That is, the following functions:

 So, we can see your site with more things about ?
vasile

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2000\11\27@195550 by David Lions

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I have posted my code at:

http://members.optushome.com.au/yizgarnoff/index.html


----- Original Message -----
From: "Vasile Surducan" <TakeThisOuTvasileEraseMEspamspam_OUTL30.ITIM-CJ.RO>
To: <RemoveMEPICLISTspamTakeThisOuTMITVMA.MIT.EDU>
Sent: Monday, November 27, 2000 6:40 PM
Subject: Re: [EE]:Implementing a mp3 player, reading fat formatted disks


{Quote hidden}

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