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'[PIC]: How to use PIC to control an audio device e'
2008\03\04@122206 by John Waters

picon face

Hi All,

I need to build a portable audio device that will play music to the user wearing it. However, I want to use a PIC to control the operation of the device e.g. selecting tracks. I cannot use off-the-shelf commercially available MP3 players, because the operations of these player are all controlled by the user through some mechanical switches.

Is there any portable MP3 player that has interface to MCU, e.g. RS232? If not, could anyone suggest me some ways to achieve the purpose, whatever device or method is not important, I only need to provide a solution that a user can listen to music when he/she is walking and the track is selectable by a PIC (i.e. programmable).

Thanks in advance!

John
_________________________________________________________________

2008\03\04@124216 by Bob Blick

face picon face
--- John Waters <spam_OUTjohn_fm_watersTakeThisOuTspamhotmail.com> wrote:
> I need to build a portable audio device that will
> play music to the user wearing it. However, I want
> to use a PIC to control the operation of the device
> e.g. selecting tracks. I cannot use off-the-shelf
> commercially available MP3 players, because the
> operations of these player are all controlled by the
> user through some mechanical switches.

Well, in fact some also have other ways of controlling
them. iPods, for instance, have a serial port and
three different ways of controlling them through that
serial port.

Here's a place to start, but the search engines are
your friend.

http://ipodlinux.org/Apple_Accessory_Protocol

All that being said, most portable mp3 players are
crap, including the iPod. Or perhaps its the most
crappy, since it is just as buggy as the cheap ones,
but is more expensive.

Cheerful regards,

Bob "oops, my iPod rebooted just to spite me" "the
song playing is not the one it says is playing" "it
won't turn off" "all of a sudden my audiobooks are
mixed in with music tracks" Blick

2008\03\04@124314 by Eoin Ross

flavicon
face
Perhaps this would be a start?
http://www.mikroe.com/en/tools/easymp3/

>>> .....john_fm_watersKILLspamspam@spam@hotmail.com 04 Mar 08 12:22:01 >>>

Hi All,

I need to build a portable audio device that will play music to the user wearing it. However, I want to use a PIC to control the operation of the device e.g. selecting tracks. I cannot use off-the-shelf commercially available MP3 players, because the operations of these player are all controlled by the user through some mechanical switches.

Is there any portable MP3 player that has interface to MCU, e.g. RS232? If not, could anyone suggest me some ways to achieve the purpose, whatever device or method is not important, I only need to provide a solution that a user can listen to music when he/she is walking and the track is selectable by a PIC (i.e. programmable).

Thanks in advance!

John
_________________________________________________________________

2008\03\04@124424 by Dario Greggio

face picon face
John Waters wrote:

> Is there any portable MP3 player that has interface to MCU, e.g.
> RS232? If not, could anyone suggest me some ways to achieve the
> purpose, whatever device or method is not important, I only need to
> provide a solution that a user can listen to music when he/she is
> walking and the track is selectable by a PIC (i.e. programmable).


VS1011 should be the one, at Microchip Forum there was some hints and code.

<http://verkkokauppa.planeetta.net/epages/Planeetta.sf/en_GB/?ObjectPath=/Shops/vlsi/Products/VS1011_PROTO_BOARD>

--
Ciao, Dario -- ADPM Synthesis sas -- http://www.adpm.tk

2008\03\04@124535 by Marcel Duchamp

picon face
John Waters wrote:
> Hi All,
>  
> I need to build a portable audio device that will play music to the user wearing it. However, I want to use a PIC to control the operation of the device e.g. selecting tracks. I cannot use off-the-shelf commercially available MP3 players, because the operations of these player are all controlled by the user through some mechanical switches.
>  
> Is there any portable MP3 player that has interface to MCU, e.g. RS232? If not, could anyone suggest me some ways to achieve the purpose, whatever device or method is not important, I only need to provide a solution that a user can listen to music when he/she is walking and the track is selectable by a PIC (i.e. programmable).
>  
> Thanks in advance!
>  
> John
> _________________________________________________________________
>
This product does exactly what you describe:
http://vinculum.com/prd_vmusic1.html

2008\03\04@140810 by M. Adam Davis

face picon face
www.teuthis.com/html/daisy_mp3.html

On 3/4/08, John Waters <john_fm_watersspamKILLspamhotmail.com> wrote:
>
> Hi All,
>
> I need to build a portable audio device that will play music to the user wearing it. However, I want to use a PIC to control the operation of the device e.g. selecting tracks. I cannot use off-the-shelf commercially available MP3 players, because the operations of these player are all controlled by the user through some mechanical switches.
>
> Is there any portable MP3 player that has interface to MCU, e.g. RS232? If not, could anyone suggest me some ways to achieve the purpose, whatever device or method is not important, I only need to provide a solution that a user can listen to music when he/she is walking and the track is selectable by a PIC (i.e. programmable).
>
> Thanks in advance!
>
> John
> _________________________________________________________________
>
> -

2008\03\04@145903 by David VanHorn

picon face
> Bob "oops, my iPod rebooted just to spite me" "the
> song playing is not the one it says is playing" "it
> won't turn off" "all of a sudden my audiobooks are
> mixed in with music tracks" Blick

Yeah, but the "minimum-time-to-market" software team is laughing all
the way to the bank.

2008\03\04@151252 by Jinx

face picon face
www.nzherald.co.nz/section/story.cfm?c_id=5&objectid=10496238

2008\03\04@163922 by wouter van ooijen

face picon face
> > Is there any portable MP3 player that has interface to MCU, e.g.
> > RS232? If not, could anyone suggest me some ways to achieve the
> > purpose, whatever device or method is not important, I only need to
> > provide a solution that a user can listen to music when he/she is
> > walking and the track is selectable by a PIC (i.e. programmable).

http://www.vinculum.com/prd_vmusic1.html

Wouter van Ooijen

-- -------------------------------------------
Van Ooijen Technische Informatica: http://www.voti.nl
consultancy, development, PICmicro products
docent Hogeschool van Utrecht: http://www.voti.nl/hvu



2008\03\04@165402 by Bob Blick

face picon face
--- wouter van ooijen <.....wouterKILLspamspam.....voti.nl> wrote:

>
> http://www.vinculum.com/prd_vmusic1.html

Their "store" doesn't inspire confidence!

Cheerful regards,

Bob

2008\03\05@015215 by wouter van ooijen

face picon face
> > http://www.vinculum.com/prd_vmusic1.html
>
> Their "store" doesn't inspire confidence!

Why not? I buy from them regularly, never a problem.

Wouter van Ooijen

-- -------------------------------------------
Van Ooijen Technische Informatica: http://www.voti.nl
consultancy, development, PICmicro products
docent Hogeschool van Utrecht: http://www.voti.nl/hvu



2008\03\05@032433 by Vasile Surducan

face picon face
On 3/4/08, M. Adam Davis <EraseMEstienmanspam_OUTspamTakeThisOuTgmail.com> wrote:
> http://www.teuthis.com/html/daisy_mp3.html

This was nice. On the same theme, without the free source code, but
with a better design:
http://www.techdesign.be/projects/020/020.htm

Vasile

2008\03\05@074051 by Alan B. Pearce

face picon face
>Is there any portable MP3 player that has interface to MCU,
>e.g. RS232? If not, could anyone suggest me some ways to achieve
>the purpose, whatever device or method is not important, I only
>need to provide a solution that a user can listen to music when
>he/she is walking and the track is selectable by a PIC (i.e. programmable).

Oh, you mean you are making one of those devices that give a context related
commentary when walking around a historic site?

2008\03\14@151535 by alan smith

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Interesting.....I've never experianced that with any of my 5 ipods within the family.

David VanHorn <microbrixspamspam_OUTgmail.com> wrote:  > Bob "oops, my iPod rebooted just to spite me" "the
> song playing is not the one it says is playing" "it
> won't turn off" "all of a sudden my audiobooks are
> mixed in with music tracks" Blick

Yeah, but the "minimum-time-to-market" software team is laughing all
the way to the bank.

2008\03\14@154250 by Bob Blick

face
flavicon
face
Perhaps the 5 ipods in your family are not all being used by you, and
the one you do use isn't buggy?

So I'll also add to it "unit is off but backlight is on full with no
display".

Black 8gb Nano 2nd generation.

I think that from now on Apple products would have to be the same price
as everybody elses before I'd seriously consider a purchase. Why pay a
50% premium for something just as buggy as the rest?

There's a way I can always make mine crash, while a song is playing
change the playlist, go back to "now playing" and hit "back one song".
Instant reboot.

BTW, unit has the latest firmware.

Cheers,

Bob


On Fri, 14 Mar 2008 12:15:10 -0700 (PDT), "alan smith"
<@spam@micro_eng2KILLspamspamyahoo.com> said:
{Quote hidden}

--
http://www.fastmail.fm - Does exactly what it says on the tin

2008\03\17@124838 by alan smith

picon face
I thought about doing such a design some.....10...15 years ago.  It was one of those...wow..great idea...no time to fully invstigate it....

"Alan B. Pearce" <RemoveMEA.B.PearceTakeThisOuTspamrl.ac.uk> wrote:  >Is there any portable MP3 player that has interface to MCU,
>e.g. RS232? If not, could anyone suggest me some ways to achieve
>the purpose, whatever device or method is not important, I only
>need to provide a solution that a user can listen to music when
>he/she is walking and the track is selectable by a PIC (i.e. programmable).

Oh, you mean you are making one of those devices that give a context related
commentary when walking around a historic site?

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