If the wandboard is viable for us, I'm thinking about doing a Gen0.5,
this is a quick and dirty carrier board with:
DAC chip
TOSLINK,
2 USB jacks (one for host only and one for OTG)
ethernet,
serial port

I will make just three of these by hand, keep one and send the others to
Triode and probably JackOfAll. 

The purpose of this is to test out the USB interface and get a linux
image working with Squeezelite so we have something to put in the SD
card slot for Gen1. I'm putting DAC and S/PDIF on the board in hopes
that we can get these working as well during the 0.5 phase. Since
wandboard already has a codec using I2S and S/PDIF working my hope is
that getting these to work will not be a big issue.  

The only issue I can for see is that I will have the two audio clocks on
the board and a clock mux, somehow we need to get the processor to
select the clock frequency based on the sample rate. I'm going to
connect the mux up to one of the GPIOs on the connector and  hope we can
figure out how to control it. 

While this software phase is going on I can work on the Gen1 design with
all the features allready discussed. Since HDMI is already on the EDM I
might just go ahead and put it on the board. This i when we really need
to talk about board size, connector placement etc.

Hopefully by the time these boards are ready phase 0.5 will have
produced an SD card image that boots the system up and can play music. 


So for both Gen 0.5 and Gen1 the users will have to perform the
following:
buy a wandboard, take the module off of the supplied carrier and
install it in our board. 
download an SD card image and copy it onto a micro SD card. Put this
card into the wandboard module.
have fun!

Hopeully by the time this gets to Gen2 wandboard will be selling just
the modules.

Schedule: wandboard says they are releasing the schematics on Friday,
I'm going to be busy all  next week. The week after that I can start
designing the board, this is simple so it should only take a week to get
the design done. It takes two weeks to get the boards back, and then a
week to assemble them. So best case is 5 weeks to get the Gen0.5 boards
working. Hopefully by then a few of us can have some wandboards in hand.


John S.


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