Register 27 is the status register. According to hifiduino it contains the following information:

1. dsd or pcm mode
   
2. spdif valid or invalid
   
3. spdif mode enabled or disabled
   
4. Jitter Eliminator locked/not locked to incoming signal

I'm not sure this information can be used for this. Perhaps i'm overseeing something here?

indeed, when the sidecar is switched to the metronome the dac remains in a lock state, so I can not use this information to determine if there is any signal coming in.

Hi Ed,

You need to add some code for switching inputs. I have been tweaking GLT's code heavily. I have added the option to change between GLT's screen layout and a simplyfied screen layout. Also added code for temperature control via LM35 temperature sensor. Changed the functions of the remote keys in a way that seemed more logical to me. Volume goes from 00 to 99 instead of the other way around. I have to add a function that switches off the dac using relays when there is no signal coming in for about 20 minutes. I have build the relay board last weekend.

I also wrote a part for switching inputs (both spdif and sidecar), but because I was a bit busy with other things lately I have not finished building the dac and also did not hook up the arduino. Therefore I have not tested the code for switching inputs. All other parts have been tested by Gwikse on his B2 (except for the temperature monitoring )

So now I just need to finish my DAC to test it. Oh yes, i also have to change the code for the rotary encoder to match it with all the functions that now can be controled with my remote. I never connected te rotary encode yet . But I will soon.

if you sent me a PM I can sent you the code that I wrote for switching inputs.
Note that it is not tested yet. I can also sent you the code that I tweaked, but some parts like the temperature monitoring and switching off functions are probably not needed for you and can therefore be commented out. I think that you will like all other changed and added functions.

Edited by user Tuesday, June 19, 2012 3:16:19 PM(UTC)  | Reason: Not specified

When looking at the registers it seems like the input remapping can be set in register 12:

|x|x|0|x|x|x|x|x| Remapping: No remap
|x|x|1|x|x|x|x|x| Remapping: Remap DIG outputs for "max phase separation in analog cell"

This is most likely the same 'input remapping' like the one that can be set using dipswitch SW2:8

The integration guide from Leon clearly states that this setting enables the use of the Sidecar module by remapping the inputs of the internal DACs. When ON it maps the DACs 1, 2, 5, and 6 to the DACs 3,4,7, and 8 respectively.

Therefore I conclude that the 'input remapping' can be OFF when using one of the spdif inputs from the spdif board. Does it have any sound wise advantages when it is OFF?
If so it would be best to set it ON only when using PCM/DSD via the sidecar.

Right. Thanks.

When reading my own post again I see now that it is the remapping of the digital outputs. Not inputs. Sometimes reading can be hard

Without wanting to redirect this thread, I wonder whether I can ask a question about the Hifiduino code. I did a derivative of that code when it first came out and since I am finalizing my latest build I took a peek to see what had changed.

I came across the primeDpll routine and wonder whether people have success with that.

In my build I am using the S/PDIF mux with an I2S connection to a Buffalo II. Short of having Russ' new USB module available I ended up using the Lindemann DCC-24/192 connected to one ports of the mux. In this configuration I can only get a reliable lock for 176.4Khz and 192Khz when I set the DPLL to the second highest setting.

Is the priming routine supposed to help?

Cheers

Thomas

Edited by user Friday, June 29, 2012 5:23:21 AM(UTC)  | Reason: Not specified

Are both [S/PDIF->I2S] source and Arduino acting as 'master' on I2S bus in the setup?

Edit: replaced typo in I2S (C is 'S' in cyrillic...)

Edited by user Sunday, August 5, 2012 3:50:25 AM(UTC)  | Reason: Not specified

There can be only one master, which is Arduino in my case

No, but you have to remove the onboard firmware chip of the Buffalo in order to use arduino (as master).

The i2s source and signals both have nothing to do with the communication between master (Arduino) and slave (DAC chip), that`s I2C.

Edit: to answer your question about the configuration, hook it up just as shown in the following link. It`s that simple!

HiFiDUINO I2C connection and level converter hookup

Edited by user Sunday, August 5, 2012 2:46:17 PM(UTC)  | Reason: partly forgot to answer the question

I think you are confusing "master clock" with "master control". The Arduino is always the master control: meaning it sets the registers in the DAC. The audio sources can provide the master clock, but in the standard setting of the Buffalo, you don't have to feed it a clock since it locally generates its own clock. You don't have to worry about "master" or slave". Just connect the right wires and you are done.