setup ok?

[flatmax]

Hi there,

Thanks for contacting people on the forum. Allow me to answer inline and continue at the end ...

Greetings,

I appear to be having the same problem as Colin, or at the very least I believe our issues may be related to the same problem. I am able to playback audio as it streaming from the internet, but I am not able to feed a signal into the Audioinjector and monitor it through the output. I have already worked through Tutorial 0, but I am not able to successfully execute all the steps of Tutorial 2 - Audio programming with gtkIOStream.

I also ran the dmesg command and received a similar output:

• [6.229426] audioinjector-octo soc ASoC: CPU DAI (null) not registered - will retry
  [6.229447] audioinjector-octo soc snd_soc_register_card failed (-517)
  [7.792780] audioinjector-octo soc cs42448 <-> 3f203000.i2s mapping ok
  [7.865506] uart-pl011 3f201000.serial: no DMA platform data

This line :audioinjector-octo soc cs42448 <-> 3f203000.i2s mapping ok
indicates that hardware is setup correctly.

I also noticed that dmesg is printing the following error related to the Broadcom Processor:

• [6226.711602] bcm2835-i2s 3f203000.i2s: I2S SYNC error!

Is it possible that the problem is associated with the Broadcom processor?

Yes ! Those are standard output from the bcm2835-i2s.c code, no problem here - although it is very confusing and misleading.

The Raspberry Pi hardware documentation is listing the BCM2837 as the processor used in the Raspberry Pi 3.

In case it helps, I've included the printout from: dmesg | grep bcm2835

• [0.078602] bcm2835-mbox 3f00b880.mailbox: mailbox enabled
  [0.148900] bcm2835-dma 3f007000.dma: DMA legacy API manager at bb80f000, dmachans=0x1
  [0.330715] bcm2835-rng 3f104000.rng: hwrng registered
  [0.788503] bcm2835-wdt 3f100000.watchdog: Broadcom BCM2835 watchdog timer
  [0.788790] bcm2835-cpufreq: min=600000 max=1200000
  [0.789524] sdhost-bcm2835 3f202000.sdhost: could not get clk, deferring probe
  [0.791711] mmc-bcm2835 3f300000.mmc: could not get clk, deferring probe
  [0.889393] mmc0: sdhost-bcm2835 loaded - DMA enabled (>1)
  [0.891619] mmc-bcm2835 3f300000.mmc: mmc_debug:0 mmc_debug2:0
  [0.891626] mmc-bcm2835 3f300000.mmc: DMA channel allocated
  [4.558955] gpiomem-bcm2835 3f200000.gpiomem: Initialised: Registers at 0x3f200000
  [ 6226.711602] bcm2835-i2s 3f203000.i2s: I2S SYNC error!

Regards,

Trevor

Your hardware is setup correctly and you can play audio out. Have you tried opening audacity ? Perhaps you can generate a tone, and do an RCA loopback (connect RCA cables between outputs and input directly) channel 0 is normally the top left of the RCA connector block.

Alternatively connect your phone to the channel 0 and channel 1 and enable the live monitor in audacity, perhaps I should put up a video tutorial for that ?

Matt

[mrtrvr]

Hello Matt,

First off, thank you for your reply. I installed Audacity and was able to record, monitor, and playback the signal. It was a simple oversight on my part in which I thought the audio would play through the device while having only the Alsa Mixer open.

I am new to both Raspberry Pi and GNU/Linux with very limited experience in any programming language. I work for a large corporation in U.S. and we purchased both balanced and unbalanced Octo sound cards for use in a prototype that is still in development. I am extremely pleased with how easy it was to setup once I figured out what I was doing and will soon be purchasing one for myself.

Thank you for this project,

Trevor

[victor]

Hi,

The card cannot be detected on my RPi B+.

Dmesg shows the following:

Code: Select all

[    5.434213] gpiomem-bcm2835 20200000.gpiomem: Initialised: Registers at 0x20200000
[    8.123212] cs42xx8 1-0048: failed to get device ID, ret = -121
[    8.136336] cs42xx8: probe of 1-0048 failed with error -121
[    8.692808] audioinjector-octo soc:sound: ASoC: CPU DAI (null) not registered - will retry
[    8.707873] audioinjector-octo soc:sound: snd_soc_register_card failed (-517)
[   10.282850] audioinjector-octo soc:sound: ASoC: CODEC DAI cs42448 not registered - will retry
[   10.297942] audioinjector-octo soc:sound: snd_soc_register_card failed (-517)

I removed the card and see that the messages are the same. I guess the card doesn't respond at all. Is there anything I can try?

[flatmax]

Hi there,

For some reason your system hasn't loaded in the cs42448 kernel module. how did you set up this card ?

Matt