Audio Cape Rev B schematics ?

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1

Hello everyone !

First question for me on this group… big day…

I am looking for BeagleBone audio cape Rev B schematics (announced @ elinux.com). Does anyone know who I might ask for it ?

In other words, I have been waiting for a month an a half to be able to buy a audio cape (in France) an so far every “where to buy” is out of stock.

But anyway I wanted to make a custom audio cape based on the available one.

I looked at the schematics (Rev A) and saw there was a lot of DVI things in it. Then I saw a yet-to-come Rev B with what seems to be a much cleaner PCB (audio only ?). Plus it has a AIC3104 (instead of the 3106) which adds selectable bias voltage !

So : nowhere to buy + available schematics (I hope) = let’s build it !

Does anyone have any info that could help me getting started ?

Regards,

2

Hi Valentin!

I don’t know about Rev B version but our product is exactly what you need: it contains only the audio chip 3104 and has MIC with bias voltage. If you are OK with Altium Designer then the full project is here (the source is GPL, so guys enjoy cloning it!):

https://code.google.com/p/usomiq-audio-cape/source/checkout

I will send the full schematic to your email directly in order to not pollute the mail-list

3

I’m also looking for and analog audio solution.

Cloud you please send the schematic to my email?

thx in advance

4

Valentin,

the audio cape revb is in production now and should be available for purchase within 14 to 21 days.

the design files for the audio cape revb are available on the wiki page: http://www.elinux.org/CircuitCo:Audio_Cape_RevB#Documentations

5

Valentin,

the audio cape revb is in production now and should be available for purchase within 14 to 21 days.

the design files for the audio cape revb are available on the wiki page: http://www.elinux.org/CircuitCo:Audio_Cape_RevB#Documentations

Do you have a device tree overlay for this board?

6

yes but it won’t be posted until we are ready to ship…

Dave

7

David, any news regarding this subject?

8

yes but it won’t be posted until we are ready to ship…

Hi Dave,

When are you shipping this product?

Regards,
John

9

we are trying to get them into the production line now, however we are spending 98% of our production time right now on producing beaglebone black boards…

once stock is back solid we’ll put them into the production line…

Dave

10

we are trying to get them into the production line now, however we are spending 98% of our production time right now on producing beaglebone black boards…

once stock is back solid we’ll put them into the production line…

Thanks Dave,

BTW, have you finalized the DTS file for this board?

Regards,
John

11

You can download the Device Tree Overlay from http://elinux.org/CircuitCo:Audio_Cape_RevB

12

You can download the Device Tree Overlay from http://elinux.org/CircuitCo:Audio_Cape_RevB

Have you tried this DTO? Just reviewing it, it doesn’t look correct. First, the pinmux comments look incorrect. For example

0x1ac 0x00 /* mcasp0 _ahclkx, MODE0 | INPUT */

MODE 0 | INPUT should be 0x20

Also, there is no pinmux for axr0

I have attached my own Audio Device Tree which works fine with TLC320AIC3106EVM.

Regards,
John

BB-BONE-AUDI-02-00A0.dts (2.44 KB)

13

Hi, I’m looking for usomiq-audio-cape schematic, can you send me please?
thank you

regards