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Rockbox mail archiveSubject: Re: Sansa radio driver (AS5314 helpRe: 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 Page template was last modified "Tue Sep 7 00:00:02 2021" The Rockbox Crew -- Privacy Policy |