well, this is getting .... interesting. i've bought some MAX3378 level converters, to cope with the 1.8v to 2.6v voltage differences (MAX3378 so that i don't have to worry about getting the direction right).

i'm wiring the UC-864-G Digital Video PCM to the OMAP3530's "MCBSP" - multi-channel buffered serial port. i'm not going to worry about providing the voltages via a stable power source yet, i'm just going to nick the voltages on each side from each device.

i've soldered the MAX3378 onto a prototyping board (0.5mm pitch...) and tested one of them. stunningly, it worked - powered by 3x 1.5v batteries on one side and 2x 1.5v batteries on the other :)

the next step is to write a McBSP audio driver, making sure all the parameters are right, and also mashing omap-mcbsp.c into submission. omap-mcbsp.c assumes that all audio channels will be stereo and variable (KNOT) rate. UC-864-G actually does U-Law, A-Law or Linear Q15, which i believe to be Signed 16-bit (S16 in alsa terminology), and it's specifically 8kbaud and it's definitely mono.

the only bits i'm not sure about are whether i should be setting an external clock (like the pandora) on the McBSP and whether i should be setting inverted-frame and inverted-clock because the UC-864-G defaults to "master" and sends data on "falling edge"...

mmmm :)