[LAU] Open Sound Interface project beginnings

[Christoph Kuhr]

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> My idea is to control adc/dac directly from an FPGA (lots of them, 
> potentially).  I'm familiar with I2C and SPI interfaces on adc/dac, 
> and there's a few differences between devices (order of bits from
> MSB to LSB or LSB to MSB for instance).
yes, i thought so too...
something like this:
	  ______________
	  | 	 	|<-> *2 <->adat
adc *1 	->|		|<-> *2 <->spdif/aes-ebu
	  |fpga	->i2s	|<->xmos avb
dac *1	<-|	  *3	|<->some phy <->madi   			
	  |_____________|<->some phy <->ieee1394

*1	you need external adc and dac, because lowcost developement onboard
adc/dac have only 10 or 12bit resolution...

*2 	adat to I2S boards (properiterian codec)
http://electronics.dantimax.dk/Kits/Digital_audio/11329401182.html
	spdif/aes-ebu to I2S boards
http://electronics.dantimax.dk/Kits/Digital_audio/11319920832.html
http://electronics.dantimax.dk/Kits/Digital_audio/12906353062.html

*3 	MSB/LSB switching can easyly be done with fpga

Ck





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