linuxaudio.org

On Wed, Oct 26, 2011 at 7:56 AM, Christoph Kuhr  wrote:

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> Hi!

> great idea!!!!!!!!

> im desperatly looking for AVB (IEEE 802.1BA) adc/dac s. this could be THE

> solution...

Hi Christoph
I'm unfamiliar with AV bridging--what do you use it for?
>

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>> 1.  Modules for dac and adc with on-board identifiers  (mixed-signal

>> design)

>> 2.  A FPGA-based programmable system board with connectors for

>> respective modules (high-frequency circuit design)

>> 3.  FPGA code for buffers, clocks, and device discovery (VHDL/Verilog

>> programming)

>

> Did you have a look at opencores.org for IPs?

> I2C and I2S cores are available at opencores.org

That seems pretty interesting, but it could be more streamlined.  RISC

is (I think) overkill, but it wouldn't hurt to study it :)

http://opencores.org/project,i2c

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>

>> 4.  Data transport modules (FPGA code plus hardware design), could be

>> USB, FW, ETH, PCI, wireless, etc...

>

> Perhapes two transport modules?

> like FW and ETH -> AudioVideoBridging? (they share the same codec

> implementation: iec61883-x)

> if you like to use it with a laptop, use FW. if you have a little

> projectstudio with seperated recording/control room situation it would

> integrate in an AVB environment.

> The DAW would need to have an AVB ready NIC, means PTP HW timestamping

> between PHY and MAC.

> At the moment im working on a linux implementaion for AVB, perhaps this is

> what i could contribute?

> my implementation will be jack a application

Gigabit ethernet has become ubiquitous on new hardware at about the

same time that firewire has become rare... I think mostly we could use

just one interface at a time---but reuse a lot of the code and

hardware.

...

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>

> There is an AVB properitarien IP for FPGA, apparently 25000€.

> => there would be the need for opensource implementation.

> so i would like to contribute my AVB stuff if/when i got it working ->

> estimated deadline july 2012...

> after that i would like to have a look at an open AVB IP for FPGA.

Isn't it crazy how expensive some of the FPGA boards and software IP

becomes?  It's like it's own little anti-competitive niche market

*cough* DoD *cough*
While the FPGA's themselves aren't prohibitively expensive, the rapid

development boards+software are.

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