XHRA-2HPA can't play sound

[henk]

Hi,

Some observations that may help you

1 Your PLL resistor is too large; it should be 4.7 ohm. You probably get away with 12 ohm, but it may not be reliable.

2 you only support one MCLK frequency; have you disabled the other frequency family in flash?

3 I am not sure about using OE as the clock input for the ICS2304NZG clock buffer; I don't see any timing specs from OE to output; they are all from IN to the output.

4 for future reference, there is no series resistor in QSPICLK. You may want to check that there isn't any stubs on QSPICLK. The board boots so this works, but it may be temperamental if the connector is creating a reflection (or if the trace is too long)

[Decourcf]

Hi,

Thanks for your quick answer. Here are the comments about it.

1) Ok, I just though this was a filter so I just oversized it a little, was thinking it wouldn't have too much influence

2) Good point, I forgot to disable the other frequency family. I just did but it is still not working.

3) This is a schematic error, I corrected it on my board but it will be changed at the next revision

4) Actually I didn't put one in order to keep the traces as short as possible. But I'll keep it in my mind for the next time.

[henk]

I hoped (2) would be the one - can you post the configuration file that you use?

Re (1) - I suggest you mod your board if you can and replace it with a 4.7 ohm resistor. It draws a current through that resistor, and the voltage will drop more than it should due to the 12 ohm resistor. It probably isn't the problem; but worth fixing just in case it is.

[Decourcf]

Here is the last configuration file I tried. Tell me if you want the binaries.

[henk]

That looks all good.

Can I suggest you connect it to your mac, and check the drop-down box with speeds just to confirm that only 48 and friends exist?

When you do that, also try and select it as an output device on the mac - what happens next?

Is there any signal on the SPDIF out? There should at least be a stream of zeroes with the right sample rate?

[tjstyle]

Hi Decourcf,

Can you tell me what tool that you use for programming QSPI flash?
I'm still no luck to writing the firmware in quad mode.


Regards,
TJ