DIY CD drive based on a computer CDROM - Page 21

aspycaudio · 21st September 2003, 06:07 AM

Hello!

Where can I find a C/C++ source code (for PIC16 Series/8051 MCU) to control the IDE CD-ROM???

Lupulroz · 22nd September 2003, 04:55 PM

It's easy to identify digital signals into older cdrom's. Just look after the DAC chip on the board, find it's datasheet and observe data/clock input pins and format accepted. (sony or I2S)
Remove DAC chip and wire out serial data and clocks; say bye-bye to sp/dif.

Micky_mike · 6th October 2003, 06:04 PM

How is it going with this project. I'm very interested and I'm testing on how I can use my cd rom( liteon) as a standalone. Is there any progress in this project?

MCLL · 7th October 2003, 12:36 AM

Quote:

Originally posted by aspycaudio
Hello!

Where can I find a C/C++ source code (for PIC16 Series/8051 MCU) to control the IDE CD-ROM???

Try This PDF (have some chinese character)

ATA Sample

Lupulroz · 8th October 2003, 05:31 PM

Ok, let's revive a little bit this thread

I just finished the control board. I have a few bugs to fix, but is working fine. The features are as described in my previous posts: lcd display support(2x16) , remote control and a few buttons. This version is suitable for getting data on sp/dif output or, for the brave ones, I2S/Sony data lines could be found inside on some cdrom's.
I will post schematic and pictures soon; maybe I can make a few boards available if there is some request.
I strongly recommend clock upgrade inside any cdrom!

omar · 8th October 2003, 05:48 PM

Quote:

Originally posted by Lupulroz
Ok, let's revive a little bit this thread
I just finished the control board. I have a few bugs to fix, but is working fine. The features are as described in my previous posts: lcd display support(2x16) , remote control and a few buttons. This version is suitable for getting data on sp/dif output or, for the brave ones, I2S/Sony data lines could be found inside on some cdrom's.
I will post schematic and pictures soon; maybe I can make a few boards available if there is some request.
I strongly recommend clock upgrade inside any cdrom!

Hi,Lupulroz
what you mean getting data on spdif?
IMO, I thought we can control the CDROM only through the IDE interface.
And the digital output of the CDROM transmit the sound signal.

If anything wrong please correct me!

Matttcattt · 8th October 2003, 06:39 PM

i have finished my prototype of the MoCoP project, here: http://private.addcom.de/KeithWilson/Projects/mucop.htm

i built it on vero/strip board. not a PCB.

i cannout find a 20MHz resonator or crystal, so i cannot test it.

i will report back when i have tested it.

Lupulroz · 8th October 2003, 07:30 PM

Hi Omar
That's exactly how you say: control through ATA interface, digital out on sp/dif... I don't see where lies the mistery..

omar · 8th October 2003, 11:48 PM

Hi,Lupulroz
You said that your version sutable for getting "data" from spdif so I thought which means control signal......

Now is cristal clear.....it's my misunderstanding.....what am I thinking then........

Expecting your detail and pics....

bknauss · 9th October 2003, 01:57 AM

I'm assuming if you have a digital output, then the sound comes out of the analog and digital outputs at the same time (no need for code to select the ouput). If this isn't true, then give me a yell. Looks like with my assumptions that I could use matttmattt's design, and using the digital output, and hook the standalone player straight to the digital input of my receiver.

davesaudio · 19th October 2003, 02:49 AM

any progress on the mucop?
(lost track of the t's.. sorry)

Lupulroz · 21st October 2003, 08:32 AM

It seems to be a difference in responses to some interogations between older cdrom drives and new ones. This is why it takes tame to finalize software, I am trying to write an "universal" code. For example I made a version that worked perfectly on an older drive, but a new TEAC unit just ignore some requests.
With older units you can get data (if you open them) generally in Sony/BB, so they are still worth.
Either sp/dif (with clock upgrade inside) will do good with new drives I think.
I hope this week final version will be ready, or I make 2 versions of code..

Matttcattt · 21st October 2003, 10:15 AM

Quote:

Originally posted by davesaudio
any progress on the mucop?
(lost track of the t's.. sorry)

not yet...

i havent had a chance to get a resonator or a crystal, i hope to get one in the next week or two.

[edit]: PS: dont worry about the t's :P

davesaudio · 27th October 2003, 10:35 PM

Lupulroz , are the ata commands specific to audio cd
EXAMPLE: something like "play the first audio track"
versus " play the first file" (- whatever it is?)

curious dave

rfbrw · 27th October 2003, 11:36 PM

There is more than one play command. You can command the device to play from start to finish and depending on the device you may or may not be able to stop the device and have it remember where to continue from. Alternatively there is the play from point a to point b command but to use this command you have to read and store the TOC.Then there are the various read commands but tackling them with a microcontroller is not for the squeamish.

21st September 2003, 06:07 AM	#301
aspycaudio diyAudio Member Join Date: Sep 2003 Location: St. Moravica	Where can I find! Hello! Where can I find a C/C++ source code (for PIC16 Series/8051 MCU) to control the IDE CD-ROM???

22nd September 2003, 04:55 PM	#302
Lupulroz diyAudio Member Join Date: Apr 2003 Location: Mars	digital signals into some cdrom's It's easy to identify digital signals into older cdrom's. Just look after the DAC chip on the board, find it's datasheet and observe data/clock input pins and format accepted. (sony or I2S) Remove DAC chip and wire out serial data and clocks; say bye-bye to sp/dif.

8th October 2003, 06:39 PM	#307
Matttcattt diyAudio Member Join Date: Feb 2003 Location: Bristol	i have finished my prototype of the MoCoP project, here: http://private.addcom.de/KeithWilson/Projects/mucop.htm i built it on vero/strip board. not a PCB. i cannout find a 20MHz resonator or crystal, so i cannot test it. i will report back when i have tested it. __________________ If it aint broke, don't fix it. If it is broke, fix it. If you can't fix it, take it apart and see how it "worked".

19th October 2003, 02:49 AM	#311
davesaudio diyAudio Member Join Date: Feb 2003 Location: GTA	hey mat(lotsa t's)cat(lotsa t's) any progress on the mucop? (lost track of the t's.. sorry) __________________ intentionally blank

27th October 2003, 10:35 PM	#314
davesaudio diyAudio Member Join Date: Feb 2003 Location: GTA	Lupulroz , are the ata commands specific to audio cd EXAMPLE: something like "play the first audio track" versus " play the first file" (- whatever it is?) curious dave __________________ intentionally blank


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6th October 2003, 06:04 PM	#303
Micky_mike diyAudio Member Join Date: Sep 2003 Location: Netherlands	How is it going with this project. I'm very interested and I'm testing on how I can use my cd rom( liteon) as a standalone. Is there any progress in this project?

8th October 2003, 05:31 PM	#305
Lupulroz diyAudio Member Join Date: Apr 2003 Location: Mars	Ok, let's revive a little bit this thread I just finished the control board. I have a few bugs to fix, but is working fine. The features are as described in my previous posts: lcd display support(2x16) , remote control and a few buttons. This version is suitable for getting data on sp/dif output or, for the brave ones, I2S/Sony data lines could be found inside on some cdrom's. I will post schematic and pictures soon; maybe I can make a few boards available if there is some request. I strongly recommend clock upgrade inside any cdrom!

8th October 2003, 07:30 PM	#308
Lupulroz diyAudio Member Join Date: Apr 2003 Location: Mars	Hi Omar That's exactly how you say: control through ATA interface, digital out on sp/dif... I don't see where lies the mistery..

8th October 2003, 11:48 PM	#309
omar diyAudio Member Join Date: Feb 2003 Location: CA	Hi,Lupulroz You said that your version sutable for getting "data" from spdif so I thought which means control signal...... Now is cristal clear.....it's my misunderstanding.....what am I thinking then........ Expecting your detail and pics....

9th October 2003, 01:57 AM	#310
bknauss diyAudio Member Join Date: Jul 2002 Location: Gaithersburg, MD	I'm assuming if you have a digital output, then the sound comes out of the analog and digital outputs at the same time (no need for code to select the ouput). If this isn't true, then give me a yell. Looks like with my assumptions that I could use matttmattt's design, and using the digital output, and hook the standalone player straight to the digital input of my receiver.

21st October 2003, 08:32 AM	#312
Lupulroz diyAudio Member Join Date: Apr 2003 Location: Mars	It seems to be a difference in responses to some interogations between older cdrom drives and new ones. This is why it takes tame to finalize software, I am trying to write an "universal" code. For example I made a version that worked perfectly on an older drive, but a new TEAC unit just ignore some requests. With older units you can get data (if you open them) generally in Sony/BB, so they are still worth. Either sp/dif (with clock upgrade inside) will do good with new drives I think. I hope this week final version will be ready, or I make 2 versions of code..

27th October 2003, 11:36 PM	#315
rfbrw diyAudio Member Join Date: Oct 2001 Location: .	There is more than one play command. You can command the device to play from start to finish and depending on the device you may or may not be able to stop the device and have it remember where to continue from. Alternatively there is the play from point a to point b command but to use this command you have to read and store the TOC.Then there are the various read commands but tackling them with a microcontroller is not for the squeamish.

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