From: Thierry Reding <thierry.reding@gmail.com>
To: Gordon Hollingworth <gordon@raspberrypi.org>
Cc: "linux-pwm@vger.kernel.org" <linux-pwm@vger.kernel.org>
Subject: Re: PWM DMA interface
Date: Wed, 18 Jun 2014 00:54:05 +0200 [thread overview]
Message-ID: <20140617225401.GA25525@mithrandir> (raw)
In-Reply-To: <CFBB4FD9.4313A%gordon@raspberrypi.org>
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On Mon, Jun 09, 2014 at 10:49:46AM +0000, Gordon Hollingworth wrote:
> Hi,
>
> I've been writing a driver that uses the PWM to talk to devices that
> communicate through a pwm like signal. To achieve this some devices have
> a dma interface that you can stream data at to the pwm...
>
> We use something similar to this on Raspberry Pi to do audio output, we
> use the PWM interface to output a 'stream' of audio data which is
> subsequently filtered (RC filter) to give an audio output.
What kind of audio data is this? Is it able to play back any arbitrary
audio signal?
Thierry
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next prev parent reply other threads:[~2014-06-17 22:54 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-06-09 10:49 PWM DMA interface Gordon Hollingworth
2014-06-17 22:54 ` Thierry Reding [this message]
2014-06-18 8:20 ` Gordon Hollingworth
2014-06-18 22:12 ` Thierry Reding
2014-06-19 15:12 ` Gordon Hollingworth
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