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From: Peter Ujfalusi <peter.ujfalusi@nokia.com>
To: alsa-devel@alsa-project.org
Cc: ext shariff <shariffsinbox@gmail.com>
Subject: Re: Reg: Implementation of GSM digital audio path
Date: Thu, 25 Jun 2009 13:35:08 +0300	[thread overview]
Message-ID: <200906251335.08412.peter.ujfalusi@nokia.com> (raw)
In-Reply-To: <1cbe56070906250247j30e63925k3acbff5a5a3e3df8@mail.gmail.com>

On Thursday 25 June 2009 12:47:54 ext shariff wrote:
> Hi all,
>
>         Iam working on OMAP3 based custom board. On our board, GSM digital
> audio path is connected to McBSP3 and
> TWL4030 digital audio path is connected to McBSP2.
>
> I want to implement a module that transfers GSM audio data and store audio
> data into some buffer and redirect it to TWL4030 audio codec through
> McBSP2.
>
> I question is how can I implement this in ASoC?
>
> I studied ASoC framework, but I am unable to understand where to implement
> my stuff.

I think the following should do something like that:

arecord -Dplughw:0.0 | aplay -Dplughw:0.1
or
arecord -Dhw:0.0 | aplay -Dhw:0.1

I don't know what is the order of the PCMs with the twl4030 codec on your 
board, this is with the assumption:
plughw:0.0 - Voice PCM (McBSP3)
plughw:0.1 - Digital audio PCM (McBSP2)

You might want to try the --rate parameter for arecord to use 16KHz recording 
from the Voice interface..

>
> Regards,
> Shariff
> _______________________________________________
> Alsa-devel mailing list
> Alsa-devel@alsa-project.org
> http://mailman.alsa-project.org/mailman/listinfo/alsa-devel

-- 
Péter

  reply	other threads:[~2009-06-25 10:35 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-06-25  9:47 Reg: Implementation of GSM digital audio path shariff
2009-06-25 10:35 ` Peter Ujfalusi [this message]
2009-06-25 11:27   ` shariff
     [not found]   ` <1cbe56070906250411l25762a2dkce4cad25a7a293ab@mail.gmail.com>
2009-06-25 11:32     ` Peter Ujfalusi
2009-06-25 11:52       ` shariff
2009-06-25 10:41 ` Mark Brown
2009-06-25 11:28   ` shariff

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