c250 w/griffin power dock

[drphillips]

I am trying to get my c250 to play through a Griffin Power dock audio out port.  I am using the current build r20774-090421 and the bootloader from flyspray FS#9955.  The Power Dock model is 9211-SNSADK (see pics).

The usb plug on the back is power only since I am using a power adapter and not a pc usb port. 

If I boot into the original OS the port works but not when Rockbox is loaded. 

Can someone point me in the right direction?  I think this should work work because the dock is passive and is not communicating with the device.

Thanks for all the help.

[yapper]

Strange - it works fine with an e2x0 and Rockbox, but a c2x0 doesn't work.

[dreamlayers]

It is interesting that firmware/drivers/audio/as3514.c has an audiohw_set_lineout_vol() function, yet that function is not called.   Some other targets call it from set_prescaled_volume() in firmware/sound.c.  Here's an altered build, where that function is called:
http://drop.io/dreamlayers/asset/rockbox-r20774m-c200-set-lineout-vol-zip

[saratoga]

I'm 99% sure we don't actually setup the line out volume right on the e200.  I think we just feed lineout whatever level the headphone jack is, so thats probably why lineout_vol never gets called.

[yapper]

On the e200, the dock Line Out volume varies as the e200 volume is adjusted. In other words, it tracks the headphone level (as saratoga said).

[choke]

I have a Belkin Tunecast for Sansa  -- $ 10 at Buy.com http://www.buy.com/prod/belkin-tune-cast-auto-fm-transmitter-2x-fm-f8m056/q/loc/111/210440553.html -- and it will work with the original firmware on my C240 but not with the latest build of Rockbox.

It wouldn't surprise me that is the same problem seen as here with the Griffin Power Dock.

Has anyone else seen this, or even better, fixed it?

[yapper]

It is interesting that firmware/drivers/audio/as3514.c has an audiohw_set_lineout_vol() function, yet that function is not called.   Some other targets call it from set_prescaled_volume() in firmware/sound.c.  Here's an altered build, where that function is called:
http://drop.io/dreamlayers/asset/rockbox-r20774m-c200-set-lineout-vol-zip

Apologies for the late response to this, but I've just got around to testing the build Boris provided and it behave exactly the same as regular builds. Sound continues to be provided via the c200's headphone socket, and nothing appears at the dock's line out connector.

Playing with the OF, it appears that briefly the c200 headphone level goes extremely high when connected to the dock, then it shuts off and output transfers to the Line Out connector on the dock.

EDIT:  Just found this patch which appears to be what is needed: http://www.rockbox.org/tracker/8305 but it isn't synch'ed to a current build

[drphillips]

Any idea when this patch will be added to the current builds?  I would really like this feature.

Thanks

[saratoga]

Any idea when this patch will be added to the current builds?  I would really like this feature.

Whenever its finished I suppose. 

[yapper]

There is a wiki page for storing details of Sansa accessories here: http://www.rockbox.org/twiki/bin/view/Main/SansaAccessories

_{Soap edit:  Fixed bad link}

[drphillips]

Bump

Just seeing if anyone knows if this has been updated in any of the builds?

Thanks

[saratoga]

Bump

Just seeing if anyone knows if this has been updated in any of the builds?

Thanks

You can just click the file spray task above and see its status  (as of tonight it hasn't changed since the last time you asked).