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Subject: Re: Sansa radio driver (AS5314 help

Re: Sansa radio driver (AS5314 help

From: Christian Gmeiner <christian.gmeiner_at_gmail.com>
Date: Wed, 16 May 2007 23:57:50 +0000

Maybe there could also be some extra work to do - something like
70000084 |= 1 - to get better audio results. I have played a lot with
volume settings and i dont get it better as it is yet.

2007/5/16, Michael Sevakis <jethead71_at_sbcglobal.net>:
> This brings up some important questions to answer: What audio
> processing/switching hardware exists outside the codec chip (besides this)?
> Is it an established fact that the OF eq is software? Signal processing
> could easily be slipped in on the I2S bus between the CPU and AS3514.
>
> I noticed also location 70000020 is always checked after reading TIMER1_VAL
> once in the OF menu. Value is always 0x40000000 at least to the point I've
> gone so far.
>
> ----- Original Message -----
> From: "Ivan Zupan" <zivan56_at_iwdstudio.com>
> To: "Rockbox development" <rockbox-dev_at_cool.haxx.se>
> Sent: Wednesday, May 16, 2007 5:26 PM
> Subject: Re: Sansa radio driver (AS5314 help
>
>
> > Great news folks. Very loud audio!
> > The secret was the stuff involving address 0x70000084 and 0x70000080!
> > Now to work on the algorithms for tuning and getting volume control to
> > work with the line1 in (very loud even if gain is very low)
> > Btw, the settings below actually mute line1 in while tuning, so it is a
> > bit misleading :)
> > Thanks for the help with figuring this out.
> >
> >
> >
> > Antonius Hellmann wrote:
> > > If you can hear any sound, then I would assume, that the device is
> > > working.
> > > So nothing more to be done with the radio init/powerup.
> > > I bet, that the audio configuration is not correct yet.
> > > In the emu I found following AS3514 init sequence after entering the
> > > radio menu
> > > and after setting up the tuner:
> > > AUDIOSET1 4e
> > > 70000084 |= 1 <<<<< don't know, wether this is radio related
> > > 70000080 |= 4 <<<<< don't know, wether this is radio related
> > > HPH_OUT_L e0
> > > HPH_OUT_L 6b
> > > HPH_OUT_R eb
> > > LINE_IN1_L df
> > > LINE_IN1_R df
> > > AUDIOSET1 4a
> > > AUDIOSET1 4e
> > > LINE_IN1_L df
> > > LINE_IN1_R df
> > >
> > > And regarding your other question:
> > > 69ddd55 0000e8f4 CPU ???????? 70000020 R4-40000000
> > > 69ddd57 0000e8fc CPU ???????? 70000020 W4-40000000
> > > I added the comment after looking at the assembler code at addr
> 0000e8f4.
> > > The cpu reads a value from 0x70000020, bics bit11 and stores the
> > > result. Nothing wrong here.
> >
>
>
>
Received on 2007-05-17


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