Lpc2000

Hi All,

 

I'm facing a new challenge that I haven't tried to solve before and I would
like some input if anyone has tried this before. I need to record and
playback voice/sound from a microphone and store it on a Secure Digital card
with FAT16 file format, which is no problem, but what I would like some
input on is what "front end" IC I could use to maybe do the MP3 encoding so
that I only have to "cheat" and store the pre encoded signal on the SD card
and be able to play it back again.

 

I was thinking of using maybe a IC like this:
http://www.analog.com/UploadedFiles/Data_Sheets/76229755AD73311L_a.pdf
although it does not have the capacity to encode/decode MP3, I could use it
for both encoding and decoding my raw audio signal, but what I can't
determine is if I'm able to store the data as fast as it samples with
64/32KHz onto the SD card.

 

I know that Micronas makes some kind of MAS de/encoder for MP3 but have
anyone had success with it? 

 

Best regards

Lasse Madsen

 

/My current knowledge doesn't enable me to use DSP processors as I've never
worked with them before and now is not the time to start unfortunately.



[Non-text portions of this message have been removed]

Lasse Madsen

I can not help you. But you can help me. I am working on FAT based mmc
car data acquisition project.

Can you help me on FAT32? I'll be obliged.

Vimal Amin

On 8/22/05, Lasse Madsen <Lasse.Madsen@...> wrote:
> Hi All,
> 
> 
> 
> I'm facing a new challenge that I haven't tried to solve before and I would
> like some input if anyone has tried this before. I need to record and
> playback voice/sound from a microphone and store it on a Secure Digital card
> with FAT16 file format, which is no problem, but what I would like some
> input on is what "front end" IC I could use to maybe do the MP3 encoding so
> that I only have to "cheat" and store the pre encoded signal on the SD card
> and be able to play it back again.
> 
> 
> 
> I was thinking of using maybe a IC like this:
> http://www.analog.com/UploadedFiles/Data_Sheets/76229755AD73311L_a.pdf
> although it does not have the capacity to encode/decode MP3, I could use it
> for both encoding and decoding my raw audio signal, but what I can't
> determine is if I'm able to store the data as fast as it samples with
> 64/32KHz onto the SD card.
> 
> 
> 
> I know that Micronas makes some kind of MAS de/encoder for MP3 but have
> anyone had success with it?
> 
> 
> 
> Best regards
> 
> Lasse Madsen
> 
> 
> 
> /My current knowledge doesn't enable me to use DSP processors as I've never
> worked with them before and now is not the time to start unfortunately.
> 
> 
> 
> [Non-text portions of this message have been removed]
> 
> 
> 
> 
> 
> Yahoo! Groups Links
> 
> 
> 
> 
> 
> 
> 


-- 
Vimal Amin
Digital Systems, Partner
204 Tapo Comm. Center
RamMandir Road
Goregaon (W)
Mumbai 400104
India
Phone : 91 22 2875 4218
Fax : 2874 2093

Hi,

For the FAT + MMC card, go there : http://www.ulrichradig.de/index.html
there is source code + schematics for LPC2xxx

Sebastien


----- Original Message -----
From: "Digital Systems, Partner" <dsystem@...>
To: <lpc2000@yahoogroups.com>
Sent: Monday, August 22, 2005 5:02 PM
Subject: Re: [lpc2000] OT: Sound record/playback


> Lasse Madsen
>
> I can not help you. But you can help me. I am working on FAT based mmc
> car data acquisition project.
>
> Can you help me on FAT32? I'll be obliged.
>
> Vimal Amin
>
> On 8/22/05, Lasse Madsen <Lasse.Madsen@...> wrote:
> > Hi All,
> >
> >
> >
> > I'm facing a new challenge that I haven't tried to solve before and I
would
> > like some input if anyone has tried this before. I need to record and
> > playback voice/sound from a microphone and store it on a Secure Digital
card
> > with FAT16 file format, which is no problem, but what I would like some
> > input on is what "front end" IC I could use to maybe do the MP3 encoding
so
> > that I only have to "cheat" and store the pre encoded signal on the SD
card
> > and be able to play it back again.
> >
> >
> >
> > I was thinking of using maybe a IC like this:
> > http://www.analog.com/UploadedFiles/Data_Sheets/76229755AD73311L_a.pdf
> > although it does not have the capacity to encode/decode MP3, I could use
it
> > for both encoding and decoding my raw audio signal, but what I can't
> > determine is if I'm able to store the data as fast as it samples with
> > 64/32KHz onto the SD card.
> >
> >
> >
> > I know that Micronas makes some kind of MAS de/encoder for MP3 but have
> > anyone had success with it?
> >
> >
> >
> > Best regards
> >
> > Lasse Madsen
> >
> >
> >
> > /My current knowledge doesn't enable me to use DSP processors as I've
never

> > worked with them before and now is not the time to start unfortunately.
> >
> >
> >
> > [Non-text portions of this message have been removed]
> >
> >
> >
> >
> >
> > Yahoo! Groups Links
> >
> >
> >
> >
> >
> >
> >
>
>
> --
> Vimal Amin
> Digital Systems, Partner
> 204 Tapo Comm. Center
> RamMandir Road
> Goregaon (W)
> Mumbai 400104
> India
> Phone : 91 22 2875 4218
> Fax : 2874 2093
>
>
>
>
> Yahoo! Groups Links
>
>
>
>
>
>
>
>

Hi Vimal,

>Can you help me on FAT32? I'll be obliged.

Unfortunately not, I do not have a system that supports FAT32.

Regards
Lasse Madsen

Lasse Madsen

Thanks a lot. 

I'll go through this. I am not perticular about FAT32. Only my saved
data in FAT format should be read by using PC card reader. I want to
make CSV (Coma seperated variable file) and open in XCL. You think FAT
will be sufficient?

warm regards

Vimal

On 8/23/05, Lasse Madsen <Lasse.Madsen@...> wrote:
> Hi Vimal,
> 
> >Can you help me on FAT32? I'll be obliged.
> 
> Unfortunately not, I do not have a system that supports FAT32.
> 
> Regards
> Lasse Madsen
> 
> 
> 
> 
> 
> Yahoo! Groups Links
> 
> 
> 
> 
> 
> 
> 


-- 
Vimal Amin
Digital Systems, Partner
204 Tapo Comm. Center
RamMandir Road
Goregaon (W)
Mumbai 400104
India
Phone : 91 22 2875 4218
Fax : 2874 2093

hai
    Can anybody help me locate  Salvo Pro RTOS  for 8051 family?
 
Thanks
Cygnalroy



		
---------------------------------
 Start your day with Yahoo! - make it your home page 

[Non-text portions of this message have been removed]

> hai
>     Can anybody help me locate  Salvo Pro RTOS  for 8051 family?
>  
> Thanks
> Cygnalroy

http://www.pumpkininc.com/
http://store2.esellerate.net/store/catalog.aspx?s=STR171702125&pc=

No thanks,
Arie de Muynck

> hai
>    Can anybody help me locate  Salvo Pro RTOS  for 8051 family?
>
> Thanks
> Cygnalroy

I'm curious why your choice of Salvo?  Cost?  Is it for a commercial 
product?

the reason is that I know how to use salvo because I have Salvo Pro for PIC.
 
So it will be easy for me to learn salvo in 8051 platform.
 
but I dont have sourse of salvo for 8051 to use in Keil.
 
Demo I have ,but not configurable. cant afford high costs because i am a student in microcontrollers.
 
 Sourse for salvo pic is available in Edonkey,but not for 8051.So looking for that
 
Thanks
 
Cygnalroy

Joel Winarske <joelw@...> wrote:
> hai
>    Can anybody help me locate  Salvo Pro RTOS  for 8051 family?
>
> Thanks
> Cygnalroy

I'm curious why your choice of Salvo?  Cost?  Is it for a commercial 
product? 




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