TPA - USB Transport - Page 4 - diyAudio
Go Back   Home > Forums > Commercial Sector > Manufacturers > Twisted Pear

Twisted Pear Superior quality electronic kits

Closed Thread
 
Thread Tools Search this Thread
Old 28th October 2010, 10:57 PM   #31
diyAudio Member
 
Russ White's Avatar
 
Join Date: Jan 2005
Location: Nashville, TN, USA
Send a message via Yahoo to Russ White
The XMOS chip is a controller. It just happens to be a multi-threaded one.

There will be a header that exposes unused I/O ports which could very easily be used to send or receive I2C/SPI etc, or even drive a display, or sense an RE. You get the picture.

I don't see any reason to hobble the module. I will provide access to as much of the unused stuff as I can.

If there is room I will even create pads so you can mount an off-board USB connector. Too early to say right now, but I will keep it in mind. Mostly likely your off-board connector would be in addition to the on-board one. That is not a problem.
__________________
Less pulp more juice Twisted Pear Audio.
 
Old 28th October 2010, 10:59 PM   #32
LeonvB is offline LeonvB  Netherlands
diyAudio Member
 
Join Date: May 2010
Location: Netherlands
I didn't say it's impossible, but I think you'll agree it's far easier to use a little more powerful embedded board (Alix, Beagle/Hawkboard, Atom Z-series) that pumps the data from the LAN/SATA port to the USB audio device while running a nice jukebox interface. It might be doable on an Arduino, but that doesn't mean it has to be done that way.
 
Old 28th October 2010, 11:11 PM   #33
LeonvB is offline LeonvB  Netherlands
diyAudio Member
 
Join Date: May 2010
Location: Netherlands
Russ, so is this the AC2? Any idea how much of the processing power you're using with the 8x 32/384 target you've set?
 
Old 28th October 2010, 11:15 PM   #34
diyAudio Member
 
Russ White's Avatar
 
Join Date: Jan 2005
Location: Nashville, TN, USA
Send a message via Yahoo to Russ White
Actually the XMOS is more than powerful enough for the addition of interface duties. No question about that. And even if you used another controller you would want to do things like pass HID commands to the XMOS controller so it can in turn send them back to the USB host (computer).

So all in all there are many good reason to expose those capabilities. And it really does not have any down side.
__________________
Less pulp more juice Twisted Pear Audio.

Last edited by Russ White; 28th October 2010 at 11:17 PM.
 
Old 28th October 2010, 11:16 PM   #35
diyAudio Member
 
Russ White's Avatar
 
Join Date: Jan 2005
Location: Nashville, TN, USA
Send a message via Yahoo to Russ White
I never said 8 x 384/32.

The plan for now is stereo. Later I may do multi channel, first rev will be stereo.
__________________
Less pulp more juice Twisted Pear Audio.
 
Old 28th October 2010, 11:18 PM   #36
diyAudio Member
 
Russ White's Avatar
 
Join Date: Jan 2005
Location: Nashville, TN, USA
Send a message via Yahoo to Russ White
No, The USB module is not AC2, but there is no reason it could not be used like one.
__________________
Less pulp more juice Twisted Pear Audio.
 
Old 29th October 2010, 02:46 PM   #37
diyAudio Member
 
Join Date: Sep 2008
Location: UK
Quote:
Originally Posted by Russ White View Post
Do you want it to...?
Well, if you are taking requests...

I know cheeky of me, but I'd love to see any supply rails broken out, so that its easier to implement differing suppllies for different areas of the circuit, similar to what you've already done on the BII.
 
Old 29th October 2010, 02:59 PM   #38
diyAudio Member
 
Russ White's Avatar
 
Join Date: Jan 2005
Location: Nashville, TN, USA
Send a message via Yahoo to Russ White
Quote:
Originally Posted by Woodenhead View Post
Well, if you are taking requests...

I know cheeky of me, but I'd love to see any supply rails broken out, so that its easier to implement differing suppllies for different areas of the circuit, similar to what you've already done on the BII.
Not really practical here because of the extremely high speeds. Regulation must be local.

Plus keep in mind there are 4 voltages involved. 1V 1.8V 3.3V and 5V. Supplying those externally would not only be impractical, but even more likely inferior.

In short, I will not be making such allowances on this board because I plan on designing it correctly in the first place.
__________________
Less pulp more juice Twisted Pear Audio.
 
Old 29th October 2010, 03:01 PM   #39
diyAudio Member
 
Join Date: Sep 2008
Location: UK
aww, man! no fair!

A man's got to ask, but thanks for the reply.
 
Old 29th October 2010, 03:11 PM   #40
glt is offline glt  United States
diyAudio Member
 
Join Date: Oct 2004
Quote:
Originally Posted by Russ White View Post
...
There will be a header that exposes unused I/O ports which could very easily be used to send or receive I2C/SPI etc, or even drive a display, or sense an RE. You get the picture.

I don't see any reason to hobble the module. I will provide access to as much of the unused stuff as I can.
...
Russ, thank you. ;-)

Can you describe clock generation in the chip? Thanks...
__________________
www.hifiduino.wordpress.com
 

Closed Thread


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
TPA metronome and Ivy modules woodturner-fran Swap Meet 7 29th January 2010 10:11 PM
TPA COD parts nikongod Swap Meet 6 8th January 2010 05:07 PM
A SD/USB/Ethernet transport jkeny Digital Line Level 8 25th September 2009 01:20 PM
Tpa 3122 help kkchunghk Class D 2 28th August 2009 09:44 AM
Maybe have a CD transport source USB to drive a USB DAC? wa2ise Digital Source 0 6th February 2007 01:22 AM


New To Site? Need Help?

All times are GMT. The time now is 06:54 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2