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Re: Cannot start AN00231 on xCORE-200 MC AUDIO
Posted: Thu Jun 30, 2016 2:49 pm
by infiniteimprobability
OK - so you're saying it works fine with the mod if you build and flash, but not when you run/debug?
Can you try from the command line? (open the xtimecomposer shell and do
Code: Select all
xrun bin/AN00231_ASRC_SPDIF_TO_DAC.xe
)
Re: Cannot start AN00231 on xCORE-200 MC AUDIO
Posted: Thu Jun 30, 2016 8:53 pm
by dsteinwe
I havn't found a shell view inside xtimecomposer. Therefore I have started it from the bash shell. After calling
I can run your command successfully. The question is, how can I start it from xtimecomposer?
Re: Cannot start AN00231 on xCORE-200 MC AUDIO
Posted: Fri Jul 01, 2016 9:45 am
by dsteinwe
I haven't changed anything, but today it works. Maybe that the restart of my system has fixed the problem.
I have only one final issue with the example app. XScope doesn't work. I configured as in the manual described "Run Configurations > Target I/O > xSCOPE via xCONNECT" and switched XScope to real-time mode. On starting the perspective "trace" is shown, but all the time is "disconnected" displayed and I cannot enable it with any button. Can you reproduce this issue?
Re: Cannot start AN00231 on xCORE-200 MC AUDIO
Posted: Fri Jul 01, 2016 9:59 am
by infiniteimprobability
Glad it works! If it's running from the command line (forgot to say you could add
argument to see prints) then fundamentally it's working.
"Run Configurations > Target I/O > xSCOPE via xCONNECT" and switched XScope to real-time mode.
xscope is many things - at a basic level it's a fast print mechanism with low intrusiveness, which is what this app uses. So "Run Configurations > Target I/O > xSCOPE via xCONNECT" is all you need to enable this.
switched XScope to real-time mode
is somethign different. That enables real time graphical scope mode. Like a normal scope, you have to add probes.
Try something like this in main.xc:
Code: Select all
while (1) {
select {
case spdif_receive_sample(c_spdif_rx, sample, index):
i_serial_in.push(sample, index); //Push them into serial to block
if(index ==0 ) xscope_int(0, sample);
break;
}
}
This should plot the left channel of the SPDIF stream.
Have a play - you could plot i2s_buffer_level_from_half for example to see how well the PI loop is doing mathcing the two rates
Section 18 of the xtimecomposer guide describes graphical xscope better than I can!
Re: Cannot start AN00231 on xCORE-200 MC AUDIO
Posted: Fri Jul 01, 2016 2:14 pm
by dsteinwe
Perfect! You have helped me alot. Thank you!
Re: Cannot start AN00231 on xCORE-200 MC AUDIO
Posted: Tue Aug 02, 2016 2:38 pm
by infiniteimprobability
Just to let anyone reading this thread know that both AN00231 (ASRC using SPDIF rx) and the SPDIF library itself have been updated and are now importing and playing nicely :)
Re: Cannot start AN00231 on xCORE-200 MC AUDIO
Posted: Tue Aug 02, 2016 7:40 pm
by Ross
Re: Cannot start AN00231 on xCORE-200 MC AUDIO
Posted: Mon Aug 08, 2016 2:10 pm
by infiniteimprobability
No need to worry - the updated lib_spdif library (version 2.0.2) has been modified to handle entry from single or dual issue caller:
https://github.com/xmos/lib_spdif/commi ... 1e50ed546f
It has been tested with AN00231 and all seems well.
Cheers