Re: [LAU] open hw soundcard

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To: <linux-audio-user@...>
Date: Monday, November 16, 2009 - 9:14 pm

On Mon, 16 Nov 2009 10:56:17 +0100 (CET)
karl@aspodata.se (Karl Hammar) wrote:

> Martin Peach:

Possibly, the only one that needs to be stable is the one that actually
initiates the sampling. i.e. number 5. This seems a bit messy, however,
could numbers 1-4 be done at any time after the previous conversion,
then number 5 initiated by a very stable hardware clock source, and the
remaining pulses derived from the processor.

indeed, turn it round so:

chip_select(1); // end of previous cycle
// some form of minimal time delay
chip_select(0);
// the first few bits are to start converter
bits = get_data();
bits = get_data();
bits = get_data();
bits = get_data();
// wait in this state for hardware clock

Because we've faked a serial fetch would that upset the normal fetch, or
can we simply make one more than we need and throw it away?

The hardware clock source could also be used to transmit the
syncronising pulse to the network - assuming this card is the master,
which the first development one will be of course.

Hmm, we now have a big enough thread for me to create a new fold in my
mailreader just for these entries :)

--
Will J Godfrey
http://www.musically.me.uk
Say you have a poem and I have a tune.
Exchange them and we can both have a poem, a tune, and a song.
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Messages in current thread:
Re: [LAU] open hw soundcard, Karl Hammar, (Sat Nov 14, 1:04 pm)
Re: [LAU] open hw soundcard, Joshua Boyd, (Wed Nov 25, 4:42 am)
Re: [LAU] open hw soundcard, Karl Hammar, (Wed Nov 25, 2:58 pm)
Re: [LAU] open hw soundcard, Paul Davis, (Sat Nov 14, 2:34 pm)
Re: [LAU] open hw soundcard, Folderol, (Sat Nov 14, 4:36 pm)
Re: [LAU] open hw soundcard, Karl Hammar, (Sat Nov 14, 10:42 pm)
Re: [LAU] open hw soundcard with ext. codec, Martin Homuth-Rosemann, (Tue Nov 17, 10:04 pm)
Re: [LAU] open hw soundcard with ext. codec, Karl Hammar, (Wed Nov 18, 5:37 pm)
Re: [LAU] open hw soundcard with ext. codec, Martin Homuth-Rosemann, (Thu Nov 19, 10:06 pm)
Re: [LAU] open hw soundcard with ext. codec, Karl Hammar, (Fri Nov 20, 12:56 am)
Re: [LAU] open hw soundcard with ext. codec, Folderol, (Thu Nov 19, 10:30 pm)
Re: [LAU] open hw soundcard with ext. codec, Karl Hammar, (Fri Nov 20, 1:01 am)
Re: [LAU] open hw soundcard with ext. codec, Folderol, (Fri Nov 20, 8:36 pm)
Re: [LAU] open hw soundcard with ext. codec, Karl Hammar, (Sat Nov 21, 11:26 am)
Re: [LAU] open hw soundcard with ext. codec, Folderol, (Sun Nov 22, 6:47 pm)
Re: [LAU] open hw soundcard with ext. codec, Karl Hammar, (Mon Nov 23, 1:40 pm)
Re: [LAU] open hw soundcard with ext. codec, Patrick Shirkey, (Sat Nov 21, 3:06 pm)
Re: [LAU] open hw soundcard with ext. codec, Karl Hammar, (Mon Nov 23, 1:45 pm)
Re: [LAU] open hw soundcard with ext. codec, Folderol, (Sun Nov 22, 6:52 pm)
Re: [LAU] open hw soundcard with ext. codec, Patrick Shirkey, (Sun Nov 22, 10:13 pm)
Re: [LAU] open hw soundcard with ext. codec, Karl Hammar, (Mon Nov 23, 3:08 pm)
Re: [LAU] open hw soundcard with ext. codec, Folderol, (Tue Nov 17, 10:20 pm)
Re: [LAU] open hw soundcard, Folderol, (Sun Nov 15, 5:50 pm)
Re: [LAU] open hw soundcard, Karl Hammar, (Sun Nov 15, 9:54 pm)
Re: [LAU] open hw soundcard, Folderol, (Sun Nov 15, 11:22 pm)
Re: [LAU] open hw soundcard, Karl Hammar, (Mon Nov 16, 12:32 pm)
Re: [LAU] open hw soundcard, Martin Peach, (Sun Nov 15, 10:52 pm)
Re: [LAU] open hw soundcard, Karl Hammar, (Mon Nov 16, 9:56 am)
Re: [LAU] open hw soundcard, Folderol, (Mon Nov 16, 9:14 pm)
Re: [LAU] open hw soundcard, Folderol, (Mon Nov 16, 10:26 pm)
Re: [LAU] open hw soundcard, , (Sat Nov 14, 10:20 pm)
Re: [LAU] open hw soundcard, Folderol, (Sat Nov 14, 10:31 pm)
Re: [LAU] open hw soundcard, , (Sat Nov 14, 10:54 pm)
Re: [LAU] open hw soundcard, Karl Hammar, (Sun Nov 15, 9:04 am)
Re: [LAU] open hw soundcard, , (Sun Nov 15, 11:17 am)
Re: [LAU] open hw soundcard, Karl Hammar, (Sun Nov 15, 11:38 am)
Re: [LAU] open hw soundcard, Paul Davis, (Sun Nov 15, 5:57 pm)
Re: [LAU] open hw soundcard, Karl Hammar, (Sun Nov 15, 7:06 pm)
Re: [LAU] open hw soundcard, Folderol, (Sun Nov 15, 6:54 pm)
Re: [LAU] open hw soundcard, Hans Wilmers, (Mon Nov 16, 1:25 pm)
Re: [LAU] open hw soundcard, Karl Hammar, (Sat Nov 14, 10:51 pm)