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Rockbox mail archiveSubject: Re: Sansa radio driver (AS5314 helpRe: Sansa radio driver (AS5314 help
From: Rene Peinthor <peinthor_at_gmail.com>
Date: Mon, 14 May 2007 09:41:38 +0200 On 5/14/07, Ivan Zupan <zivan56_at_iwdstudio.com> wrote: > > Barry Wardell wrote: > > It's great to see progress on this. This is just a wild guess, but I > > wonder if we have to enable a GPIO port to enable proper audio? When I > > first got sound working on the H10, the volume was very faint until I > > discovered that one of the GPIO ports enabled audio output. I wonder > > if this could be the case here too. This page: > > http://www.rockbox.org/twiki/bin/view/Main/PortPinAssignments#e200_GPIO > > might be of some help in figuring out which ports to check. > > MrH found a reference to a memory address which might need to be set, > and I have had it in the code from the start. However, I am sure that > the tuner is fully enabled since I am able to read registers properly. > The tuner only has 3+2 active pins, 3 for communication via GPIOH and 2 > for stereo sound hooked up to line1_in on the AS3514 chip. I believe I > am not writing to the FM chip properly and hence unable to set the > proper volume on it. However, it seems to react properly to some write > commands (ex. force stereo turns the status register to indicate stereo). > I know some people have disassembled the original code, hopefully > someone knows a bit more about the chip. The datasheet is lacking to > say the least, and it is not specific to this tuner (rather, the whole > family of these tuners). > You could try Toni's emulator, maybe this gives some hint's about GPIO ports or memory addresses, but i don't know how much the emulator works with the radio part of the OF. http://www.rockbox.org/tracker/task/6524 Received on 2007-05-14 Page template was last modified "Tue Sep 7 00:00:02 2021" The Rockbox Crew -- Privacy Policy |