Support and General Use > Hardware
Fuze and Griffin Dock line out
Avalon:
Hi,
I have an 8Gb Fuze V1 with 4Gb microsd installed and Rockboz is working great on it for mp3s.
I also have a Griffin dock with a line out that works great when in the sansa OS mode. When I switch to Rockbox OS, I do not get an output on the line out.
Is there a setting to correct this, or does this require a firmware modification?
saratoga:
You will need to add support for line out to the AMS audio driver.
Avalon:
I wish that I could write the code.
When in the Fuze is connected to the dock, it automatically turns on in Sansa OS with the line out enabled. If I hold the select button while inserting the Fuze in the dock, it stays in Rockbox mode, but the line out is not enabled.
This is not a selection in the OS, but looks like the line out is enabled when voltage is applied to the appropriate connector pins. For those of us who connect the Fuze to stereo systems, etc, the use of the dock capability would be a great feature to have.
Is there any chance that this would be built into the Rockbox OS or Fuze build?
saratoga:
I'm sure someone will figure it out eventually. In the mean time if you want to make that more likely you could check the debug menu's "View IO Ports screen" and see if any of the GPIO pins change values when you plug/unplug the dock. If they do, maybe whatever pin the dock flips is a GPIO pin.
Avalon:
First of all, thankyou very much for getting back to me.
I checked the View IO Ports Screen and found that the following changed:
Fuze not in dock:
GPIOA = E2
DBOP_DIN=8843
FUZE docked:
GPIOA = EA (bit 4 change)
DBOP_DIN=8A43
Nothing else changed and this is consistently repeatable.
Does this mean that there is hope?
My guess is that in the FUZE OS, the line out is always enabled but requires the voltage to be applied for it to work.
If that is the case, then if the correct register is written to in the Rockbox startup to enable the line out, then the dock would work when the Fuze is attached.
I hope that this helps and thanks again for the response.
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