WM8753 Speaker Playback ZC Switch
Hi All,
I am happily hacking on my FR and was toying with the wolfson.
I happen to notice that in order to get any sound from the earpiece i
had to switch on the Speaker Playback ZC Switch.
That switch is mentioned in the statefile, but i can't find it in any of
the diagrams on [1] [2]
Is there someone with an updated version of the diagrams, that includes
the two switches below?
control.9 {
comment.access 'read write'
comment.type BOOLEAN
comment.count 2
iface MIXER
name 'Headphone Playback ZC Switch'
value.0 false
value.1 false
}
control.10 {
comment.access 'read write'
comment.type BOOLEAN
comment.count 2
iface MIXER
name 'Speaker Playback ZC Switch'
value.0 true
value.1 true
}
Kind regards,
Ed
[1] http://wiki.openmoko.org/wiki/Neo1973_Audio_Subsystem
[2] http://www.wolfsonmicro.com/products/audio_hubs/WM8753/
___
Openmoko community mailing list
community@lists.openmoko.org
http://lists.openmoko.org/mailman/listinfo/community
Re: WM8753 Speaker Playback ZC Switch
On Friday 12 November 2010, Ed Kapitein wrote:
Hi All,
I am happily hacking on my FR and was toying with the wolfson.
I happen to notice that in order to get any sound from the earpiece i
had to switch on the Speaker Playback ZC Switch.
That switch is mentioned in the statefile, but i can't find it in any of
the diagrams on [1] [2]
The one in the wiki is just an annotation of the Wolfson diagram, adding alsa
control numbers to the visible elements where I could identify them. I think
there were some elements I couldn't identify a control number for, and there
are a lot of controls that have no representative element in the diagram,
usually because they involve digital processing rather than an identifiable
analogue element. If you find a mistake or something to add then please make
the correction.
Is there someone with an updated version of the diagrams, that includes
the two switches below?
control.9 {
comment.access 'read write'
comment.type BOOLEAN
comment.count 2
iface MIXER
name 'Headphone Playback ZC Switch'
value.0 false
value.1 false
}
control.10 {
comment.access 'read write'
comment.type BOOLEAN
comment.count 2
iface MIXER
name 'Speaker Playback ZC Switch'
value.0 true
value.1 true
}
Kind regards,
Ed
[1] http://wiki.openmoko.org/wiki/Neo1973_Audio_Subsystem
[2] http://www.wolfsonmicro.com/products/audio_hubs/WM8753/
___
Openmoko community mailing list
community@lists.openmoko.org
http://lists.openmoko.org/mailman/listinfo/community
Re: WM8753 Speaker Playback ZC Switch
Hi, Ed Kapitein e...@kapitein.org writes: I am happily hacking on my FR and was toying with the wolfson. I happen to notice that in order to get any sound from the earpiece i had to switch on the Speaker Playback ZC Switch. This is used to enable/disable Zero Cross detection, i.e. the gain will be changed only on zero cross (or timeout). I'm afraid you'll need to refer to the actual datasheet to understand this in details. Feel free to ask me if anything is unclear. HTH -- Be free, use free (http://www.gnu.org/philosophy/free-sw.html) software! mailto:fercer...@gmail.com ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
