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Re: Ideas about an analog-to-digital converter API
>On Wed, Dec 31, 2008 at 06:16:28PM -0500, Ken Hornstein wrote:
>> I've been thinking about writing a driver for the A/D converter hardware
>> in one of the ARM boxes that I have. I have the documentation, and writing
>> that driver looks relatively straightforward. But ... what I am having
>> a problem with is: what should the userspace API look like?
>audio(4) may do.
You know, I should have said something about that ...
Yes, I know that an audio recorder is an A/D converter. And I did look
at the audio interface. But ... it's not a good fit, for a couple of
- audio(4) is complicated. It has a lot of stuff in it. This complexity
makes it a lot of work to do what I would think are relatively simple
- It doesn't have the functionality to support the features of some A/D
converter hardware. E.g, there isn't a way to select the analog input
range. You could overload some stuff in the current audio interface,
but it just ... feels awkward.
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