Actually the final board is with 2 layers, too. But if there are enough requests I will make the boards available. I will post schematic today. I'm working also for the complementary DAC for the cd-rom drive in this configuration: AD1892/PLL1705/AD1865N-k/custom I-V stage.
Lupulroz said:
Depending on the price, I might be interested.
The digital signal is in SPDIF format, as far as I understood, unless you have a player that has I2S inside.. right?
Cheers
Andrea
was just gonna ask what I need to look for in my pic drawer...
reuses a nibble to talk to the lcd ?- clever
maybe link to larger image?
reuses a nibble to talk to the lcd ?- clever
maybe link to larger image?
ok, i have finnal got a crystal and tested my prototype of the MuCoP circuit. first time, nothing. re-check every connection, 4 connections reversed. so i fixed that, and try agian. this time, the IDE status LED came on, but all commands are ignored.
i think the chip (a 4MHz version of the PIC16F877) cannot handle 20MHz. 😛 i will try re-programming it, on monday when i will have a chance to get to my PIC programmer. if that does not work, i will buy a new PIC (a 20MHz one).
sorry to disappoint anyone.
i think the chip (a 4MHz version of the PIC16F877) cannot handle 20MHz. 😛 i will try re-programming it, on monday when i will have a chance to get to my PIC programmer. if that does not work, i will buy a new PIC (a 20MHz one).
sorry to disappoint anyone.
Hello MatttCattt,
Maybe this link is interesting to you:
http://private.addcom.de/KeithWilson/Projects/mucop.htm[/U]
I do not know if you program in assembler or a higher programming language.
Keep us updated about you nice project.
Best Regards:
Nexus
Maybe this link is interesting to you:
http://private.addcom.de/KeithWilson/Projects/mucop.htm[/U]
I do not know if you program in assembler or a higher programming language.
Keep us updated about you nice project.
Best Regards:
Nexus
Nexus said:
Mucop is the project MatttCattt is building. On a related note has anyone managed to get one of these players to play back at greater than 1X speed?
ray.
Lupulroz, we like what we see
in which direction are you thinking?
a commercial offer /a kit / board / open source / something else ?
in which direction are you thinking?
a commercial offer /a kit / board / open source / something else ?
Playing at another speed than 1x is perfectly possible, but only implementing the READ command - and getting parallel data on the ATA-bus.
If you like my project then I will make the final boards available including pre-programmed PIC's. I don't know for the moment the price of the boards, as I have no clue how many to order.
So please, everyone who's interested give me a mail at fiction_73@yahoo.com
If you like my project then I will make the final boards available including pre-programmed PIC's. I don't know for the moment the price of the boards, as I have no clue how many to order.
So please, everyone who's interested give me a mail at fiction_73@yahoo.com
Lupulroz said:
That is not quite the case. There are two commands associated with the PLAY commands that allow you to alter the playback speed and, depending on which standard you consult, the commands in question are either reserved,optional or obsolete.
While it is likely that a newer device like DVD/CD player will adhere to the more recent standards, it is very possible that some of the older devices that adhere to older standards may well implement these older commands.
ray.
Yes, but I think we should go for new CD/DVD units - as everyone likes new laserunits.
And if we want to read all cd content in a memory and play it from there - I think it will be with READ command through ATA-bus not through sp/dif.
And if we want to read all cd content in a memory and play it from there - I think it will be with READ command through ATA-bus not through sp/dif.
Lupulroz said:
By all means tackle the READ commands and their associated overheads but I have a number of the old CD only devices and I aim to do things the easy way using the 3wire digital audio data or SPDIF.
ray.
Actually the PLAY commands are not supported by the old ATA cd-drives, according to documentation and my experiments. So anyway you have to deal with the READ command if you want to use them, I suppose.
Only newer (1997-today) ATAPI devices understand the PLAY commands.
Or you have acces to some documents that I don't know...
Only newer (1997-today) ATAPI devices understand the PLAY commands.
Or you have acces to some documents that I don't know...
I was reffering at PLAY as an ATA-command; this doesn't mean that older devices couldn't play music. Look on ATA specifications 2 to 6 and if you find the PLAY command please point it to me.
PLAY as a command appears in the document SFF-8020i dated january 1996 - the ATAPI extension.
PLAY as a command appears in the document SFF-8020i dated january 1996 - the ATAPI extension.
Lupulroz said:
Older cd-players already had the possibility to be controlled via software. Thus via ATA. I am not an expert on this topic, but I'd guess that the audio CD read commands actually are new...
Fedde