EIJ on CDPRO2

DonJuan · 12th February 2004, 10:52 PM

hi

i built the cdpro2 and also the tda1545 dac.

but can't use them as the cdpro2 outputs i2s and not eiaj. any idea how to make the cdpro2 output eiaj?

it seems i need to do something to the dsa software. but i have no idea how. can i do it hardware wise?

please advise.

thanks.

donjuan

Lupulroz · 13th February 2004, 11:35 AM

I've done this with vae1250 mechanism, i guess the command set is the same. I should search for the modified eprom, but as VAE1250 is discontinued I don't have them anymore to test.
Anyway you need an eprom programmer to burn the soft...

BrianGT · 13th February 2004, 12:23 PM

The cdpro2 unit does support EIAJ, and a simple command needs to be issued over the DSA interface. I don't know you have your control board setup, but here is the command that needs to be issued.

--
Brian

Bricolo · 13th February 2004, 01:39 PM

Brian, when you use the 2FS or 4FS mode, is it oversampled or upsampled?

DonJuan · 15th February 2004, 01:13 PM

hi guys

thanks for all the reply.

any other way other than dsa communication using a pc? i was hoping for hardware changes but looks like fat chance...

donjuan

rfbrw · 15th February 2004, 02:12 PM

Why hardware not software?

BrianGT · 15th February 2004, 04:11 PM

Quote:

Originally posted by Bricolo
Brian, when you use the 2FS or 4FS mode, is it oversampled or upsampled?

I am pretty sure that it is just oversampled for the CDPRO2, from looking over other information regarding the dac. The new CDPRO2M might be different.

Quote:

Originally posted by DonJuan
hi guys

thanks for all the reply.

any other way other than dsa communication using a pc? i was hoping for hardware changes but looks like fat chance...

donjuan

In terms of the control board, if you were using my control board, I would just need to make a small modification to the firmware. I might eventually add the selection to a menu-driven interface.

I will organize a group order sometime in the future for the controller that I designed.

Gallery from my project at:
http://brian.darg.net/cdpro2

--
Brian

DonJuan · 16th February 2004, 01:22 PM

why hardware but not software?

well, if it's hardware, it's easier for me to incorporate. i can't access the firmware inside.

hi brian

interested in your controller!

donjuan

cm · 17th February 2004, 04:09 AM

I have done a EIAJ to I2S converter by delaying the LRCLK EIAJ signal by 7 BCK clock cycles by means of a shift register. You can see the schematic and PCB in my post on sharing my digital work.

I have not tried it but I see no reason why the scheme cannot work by delaying data by 7 clock cycles instead of delaying LRCLK as a means of converting from I2S to EIAJ.

12th February 2004, 10:52 PM	#1
DonJuan diyAudio Member Join Date: Sep 2002 Location: Malaysia	EIJ on CDPRO2 hi i built the cdpro2 and also the tda1545 dac. but can't use them as the cdpro2 outputs i2s and not eiaj. any idea how to make the cdpro2 output eiaj? it seems i need to do something to the dsa software. but i have no idea how. can i do it hardware wise? please advise. thanks. donjuan

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13th February 2004, 11:35 AM	#2
Lupulroz diyAudio Member Join Date: Apr 2003 Location: Mars	I've done this with vae1250 mechanism, i guess the command set is the same. I should search for the modified eprom, but as VAE1250 is discontinued I don't have them anymore to test. Anyway you need an eprom programmer to burn the soft...

13th February 2004, 01:39 PM	#4
Bricolo diyAudio Member Join Date: Nov 2002 Location: Grenoble, FR	Brian, when you use the 2FS or 4FS mode, is it oversampled or upsampled?

15th February 2004, 01:13 PM	#5
DonJuan diyAudio Member Join Date: Sep 2002 Location: Malaysia	hi guys thanks for all the reply. any other way other than dsa communication using a pc? i was hoping for hardware changes but looks like fat chance... donjuan

15th February 2004, 02:12 PM	#6
rfbrw diyAudio Member Join Date: Oct 2001 Location: .	Why hardware not software?

16th February 2004, 01:22 PM	#8
DonJuan diyAudio Member Join Date: Sep 2002 Location: Malaysia	why hardware but not software? well, if it's hardware, it's easier for me to incorporate. i can't access the firmware inside. hi brian interested in your controller! donjuan

17th February 2004, 04:09 AM	#9
cm diyAudio Member Join Date: Sep 2003 Location: Singapore	I have done a EIAJ to I2S converter by delaying the LRCLK EIAJ signal by 7 BCK clock cycles by means of a shift register. You can see the schematic and PCB in my post on sharing my digital work. I have not tried it but I see no reason why the scheme cannot work by delaying data by 7 clock cycles instead of delaying LRCLK as a means of converting from I2S to EIAJ.

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