GemStereo not working

grahamsw

Very excited to get my new Bela Stereo Gem today (and eagerly awaiting the new Mulit), and I hate to spoil the celebration with this, but I'm getting

Error: unable to start audio codec
Error: unable to start real-time audio
Failed to join audio thread: (3) No such process

errors when I build C++ samples sometimes, and sometimes they work.
Supercollider samples are just not working, with

Error: unable to start audio codec
Error in SC_BelaDriver::DriverStart(): unable to start real-time audio
start audio failed.

errors.

I have another, older, bela, and it's still works fine

grahamsw

grahamsw yes, I got the preflashed card and followed the update procedure in the IDE
Also can't get nano to work in the terminal - so adding a USB wifi is proving tricky

giuliomoro

grahamsw Error: unable to start audio codec

With the usb cable removed, can you try squeezing the two boards together and then try again?
The console at the bottom of the IDE is not designed for nano and other allt screen programs. You'll have to ssh onto the the board to use that. Also give me some time to publish the Gem version of the wifi connection page :-)

grahamsw

giuliomoro
squeezed the bejeesus out of them. The boards seem to be fully engaged and properly seated. (And it did work a couple of times)

Are there any diagnostics I can run to see what the communication between the two board is?

sshing into the board words fine. looks like interfaces/ifup isn't bein, g used, but nmcli isn't there either so looking forward to the wifi connnection page - though it's all moot if I can't make any noise

giuliomoro

What do you get with i2cdetect -y -r 2 ?

Also add --verbose to the command line options when running the program and post that output here.

marcofarfa

giuliomoro Hey, I'm not the original poster, but I have the exact same issues and symptoms. Freshly updated card and all that.

My output for i2cdetect -y -r 2 is:

     0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f
00:                         -- -- -- -- -- -- -- -- 
10: -- -- -- -- -- -- -- -- 18 -- -- -- -- -- -- -- 
20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
70: -- -- -- -- -- -- -- --

What is expected?

grahamsw

marcofarfa I get the same for i2cdirect -y -r 2
for running sinetone with --verbose I get

Stopping Bela ... Building project... Build finished Running project... Bela_initAudio() Starting with period size 16 ;analog enabled DAC level 999999.000000 dB; ADC level 999999.000000 dB; headphone level 999999.000000 dB Detected hardware: GemStereo Hardware specified at the command line: NoHardware Hardware specified in the user's belaconfig: NoHardware Hardware to be used: GemStereo Project name: bela-example-tmp-6cba5a8b-a970-4cdd-9993-6b4769ffd6dc Codec mode: 0 () gFifoFactor: 1 core audioFrames: 16 SchedulableTask WSClient_signalMonitor40100_bin starting Stopping PRU1_1 PRU memory mapped to ARM: digital: 0xffff8f5b8000 0xffff8f5b8400 audio: 0xffff8f5b9000 0xffff8f5b9040 0xffff8f5b9080 0xffff8f5b90c0 analog: 0xffff8f5b5000 0xffff8f5b5000 0xffff8f5b5000 0xffff8f5b5080 analog offset: 0xffffffffffffe000 0xffffffffffffe000 0xffffffffffffe000 0xffffffffffffe080 Mcasp parameters: inSerializers: { {axr: 1, mask: 0x3}, } outSerializers: { {axr: 0, mask: 0x3}, } numSlots: 2 slotSize: 16 dataSize: 16 bitDelay: 0 auxClkIn: 9.6e+07 ahclkFreq: 2.4e+07 ahclkIsInternal: 1 aclkIsInternal: 0 wclkIsInternal: 1 wclkIsWord: 0 wclkFalling: 0 externalSamplesRisingEdge: 0 r.outChannels: 2 r.inChannels: 2 r.outSerializersDisabledSubSlots: 0x0 r.inSerializersDisabledSubSlots: 0x0 Mcasp registers: pdir: 0x18000001 rmask: 0x0000ffff rfmt: 0x00008070 afsrctl: 0x00000102 aclkrctl: 0x00000000 ahclkrctl: 0x00008003 rtdm: 0x00000003 xmask: 0x0000ffff xfmt: 0x00008074 afsxctl: 0x00000102 aclkxctl: 0x00000000 ahclkxctl: 0x00008003 xtdm: 0x00000003 srctln: 1 2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 wfifoctl: 0x00010101 rfifoctl: 0x00010101 Failed to write register 18 on I2c codec Failed to write register 19 on I2c codec Setting audio input gains: channels out of range Setting audio headphone gains: channels out of range Setting audio line out gains: channels out of range Bela_startAudio startAudioInline AudioCodec parameters: numSlots: 2 slotSize: 16 startingSlot: 0 bitDelay: 0 mclk: 2.4e+07 samplingRate: 44100 tdmMode: 1 bclk: 1 wclk: 0 Failed to write register 13 on I2c codec Error: unable to start audio codec Error: unable to start real-time audio Failed to join audio thread: (3) No such process Stopping audio... Failed to write register 43 on I2c codec Bela_cleanupAudio() SchedulableTask WSClient_signalMonitor40100_bin exiting make: *** [Makefile:744: runide] Error 1 Bela stopped

giuliomoro

That's the expected result for a stereo. Can you rum the program adding --verbose to the command line options?

marcofarfa

giuliomoro Oh, wait I found the CL arguments project setting box in the IDE. Looks like a more informative error appears:

MCLK: 24.0000 MHz, fs(ref): 44100.0000, P: 2, R: 1, J: 7, D: 5264, NCODEC: 1.000000, Achieved Fs: 44100.000000 (err: 0.0000%), 
Failed to write register 92 on I2c codec
Error: unable to start audio codec
Error: unable to start real-time audio
Failed to join audio thread: (3) No such process
Stopping audio...
Failed to write register 43 on I2c codec
Bela_cleanupAudio()
SchedulableTask WSClient_signalMonitor40100_bin exiting
make: *** [Makefile:744: runide] Error 1
Bela stopped

marcofarfa

I don't want to totally hijack this thread from OP, but I can give it a try to help out. I have been using the web UI and running the C++/Fundamentals/Sinetone example, and just clicking the "Build and run" button in the GUI.

Is there an equivalent CLI command I should type out to add --verbose to?

Thanks. Brand new to this interface, but happy to help debug it

giuliomoro

can you paste the full output?

marcofarfa

New run:

Open example Fundamentals/sinetone...
Stopping Bela ...
Building project...
Building render.cpp...
 ...done
Using library WSServer
Linking...
 ...done
Build finished
Running project...
Bela_initAudio()
Starting with period size 16 ;analog enabled
DAC level 999999.000000 dB; ADC level 999999.000000 dB; headphone level 999999.000000 dB
Detected hardware: GemStereo
Hardware specified at the command line: NoHardware
Hardware specified in the user's belaconfig: NoHardware
Hardware to be used: GemStereo
Project name: bela-example-tmp-9fd4237b-dbe3-4a11-bcfb-5e8edb2bcd0a
Codec mode: 0 ()
gFifoFactor: 1
core audioFrames: 16
SchedulableTask WSClient_signalMonitor40100_bin starting
Stopping PRU1_1
PRU memory mapped to ARM:
digital: 0xffff94998000 0xffff94998400
audio: 0xffff94999000 0xffff94999040 0xffff94999080 0xffff949990c0
analog: 0xffff94995000 0xffff94995000 0xffff94995000 0xffff94995080
analog offset: 0xffffffffffffe000 0xffffffffffffe000 0xffffffffffffe000 0xffffffffffffe080
Mcasp parameters:
inSerializers: { {axr: 1, mask: 0x3},  }
outSerializers: { {axr: 0, mask: 0x3},  }
numSlots: 2
slotSize: 16
dataSize: 16
bitDelay: 0
auxClkIn: 9.6e+07
ahclkFreq: 2.4e+07
ahclkIsInternal: 1
aclkIsInternal: 0
wclkIsInternal: 1
wclkIsWord: 0
wclkFalling: 0
externalSamplesRisingEdge: 0
r.outChannels: 2
r.inChannels: 2
r.outSerializersDisabledSubSlots: 0x0
r.inSerializersDisabledSubSlots: 0x0
Mcasp registers:
      pdir: 0x18000001
     rmask: 0x0000ffff
      rfmt: 0x00008070
   afsrctl: 0x00000102
  aclkrctl: 0x00000000
 ahclkrctl: 0x00008003
      rtdm: 0x00000003
     xmask: 0x0000ffff
      xfmt: 0x00008074
   afsxctl: 0x00000102
  aclkxctl: 0x00000000
 ahclkxctl: 0x00008003
      xtdm: 0x00000003
    srctln: 1 2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 
  wfifoctl: 0x00010101
  rfifoctl: 0x00010101
Setting audio headphone gains: channels out of range
Setting audio line out gains: channels out of range
Bela_startAudio
startAudioInline
AudioCodec parameters:
numSlots: 2
slotSize: 16
startingSlot: 0
bitDelay: 0
mclk: 2.4e+07
samplingRate: 44100
tdmMode: 1
bclk: 1
wclk: 0
MCLK: 24.0000 MHz, fs(ref): 44100.0000, P: 2, R: 1, J: 7, D: 5264, NCODEC: 1.000000, Achieved Fs: 44100.000000 (err: 0.0000%), 
Failed to write register 93 on I2c codec
Error: unable to start audio codec
Error: unable to start real-time audio
Failed to join audio thread: (3) No such process
Stopping audio...
Failed to write register 43 on I2c codec
Bela_cleanupAudio()
SchedulableTask WSClient_signalMonitor40100_bin exiting
make: *** [Makefile:744: runide] Error 1
Bela stopped

giuliomoro

@marcofarfa thanks for the log. Can you please try to drag the following:

download this file https://files.bela.io/bela-dtbs-100khz.deb
drag it on top of the IDE
follow the installation instructions on screen
once done, reboot the board

and see if the problem persists?

marcofarfa

giuliomoro This fixed it for me too! And thanks @grahamsw for letting me piggyback on your thread

grahamsw

oopsie! I did this, aand now the board won't boot

It powers on, solid blue on the bela board, then the bela board light turns off as does the beagle board

giuliomoro

Oh well that's unexpected. Did you get an installation dialog when you dragged it on the IDE?

grahamsw

I did.

Just tried again - downloaded bela-dtbs-100khz.deb and flashed it to the card. Ran the gem, getting the same codec fault as before. Copied your patch over again and voila.

I then ran an update through the IDE and it still works.

Many thanks!

grahamsw

marcofarfa no problem. Was a relief to see that I wasn't the only one, and many, many thanks @giuliomoro

giuliomoro

thanks both, this update (which slows down the i2c bus to the codec to 100kHz) is now available for everyone via an update through the IDE.

@marcofarfa @grahamsw would you be able at some point to remove the cape from the PB2 and verify whether the resistors R1 and R2 are in place? Bonus points if you have a multimeter and can measure the resistance across each resistor.

To remove the cape I normally insert a flat head screwdriver in between the headers and then go around the board bit by bit, like in this video.

Be gentle and careful. Push a tiny bit at a time.

marcofarfa

giuliomoro They're there and I measured between 9.9k and 10k for both, yeah