Getting alsa on Caanoo

Getting alsa on Caanoo

[Marc Nostromo [M-.-n]]

Hi,

I'm trying to get alsa to work on an open source korean game console called
the caanoo

http://en.wikipedia.org/wiki/CAANOO

It's open source and pretty cheap with respect to the horse power it
delivers, so using it as base for an embedded synth / sequencer makes a lot
of sense to me.
I've successfully compiled and loaded the modules for audio & midi support
but I'm still stuck with the last step so I wondered if I could get any
help over here, I hope it's the right place to ask.

Right now, when I connect a midi device through USB, I get the following
console message

root@wiz:/mnt/sd/ko_s# dmesg
> usb 1-1: new full speed USB device using UBI9032 Test HCD and address 2
> usb 1-1: configuration #1 chosen from 1 choice
> MIDIStreaming version 01.00
> EP 82: 1 jack(s)
> EP 02: 1 jack(s)
> created 1 output and 1 input ports


And querying /proc/asound gives me


root@wiz:/mnt/sd/ko_s# cat /proc/asound/*
> 0 [nanoKONTROL    ]: USB-Audio – nanoKONTROL
> KORG INC. nanoKONTROL at usb-ubisys-usb-1, full speed
> 0: [ 0]   : control
> 1:        : sequencer
> 8: [ 0- 0]: raw midi
> 33:        : timer 0 snd_usb_audio
> G0: system timer : 10000.000us (10000000 ticks)
> Advanced Linux Sound Architecture Driver Version 1.0.15 (Tue Nov 20
> 19:16:42 2007 UTC).



So I'm thinking I'm on the right track.

But I don't see anything in /dev to connect to so I can't really do
anything with my device.

>From what I read here

http://www.gp32x.com/board/index.php?/topic/60064-usbrs232-device-with-the-caanoo/page__p__954641&#entry954641

it could be due to the fact /dev is mounted in read-only (and that there's
no /dev/midiXX present) and that I need to create the device file with
mknod.

However I'm not sure of what I should do in the specific context of
midi/audio with alsa. Right now all I'm looking for is raw midi & pcm out.

Could anyone give me a clue as what to try next ?

Thanks a lot
Marc

---
http://www.marc-nostromo.com

Re: Getting alsa on Caanoo

[Clemens Ladisch]

Marc Nostromo [M-.-n] wrote:
> # cat /proc/asound/*
> 0 [nanoKONTROL    ]: USB-Audio – nanoKONTROL
>
> So I'm thinking I'm on the right track.
>
> But I don't see anything in /dev to connect to so I can't really do
> anything with my device.

ALSA devices are in /dev/sound/.

> From what I read here
>
> http://www.gp32x.com/board/index.php?/topic/60064-usbrs232-device-with-the-caanoo/page__p__954641&#entry954641
>
> it could be due to the fact /dev is mounted in read-only (and that there's
> no /dev/midiXX present) and that I need to create the device file with
> mknod.

The alsa-driver package has the snddevices script, but it works only if
the kernel was compiled without CONFIG_SND_DYNAMIC_MINORS.

> However I'm not sure of what I should do in the specific context of
> midi/audio with alsa. Right now all I'm looking for is raw midi & pcm out.

aplay something.wav
aplaymidi something.mid


Regards,
Clemens

Re: Getting alsa on Caanoo

[Takashi Iwai]

At Fri, 11 May 2012 11:29:39 +0200,
Clemens Ladisch wrote:
> 
> Marc Nostromo [M-.-n] wrote:
> > # cat /proc/asound/*
> > 0 [nanoKONTROL    ]: USB-Audio – nanoKONTROL
> >
> > So I'm thinking I'm on the right track.
> >
> > But I don't see anything in /dev to connect to so I can't really do
> > anything with my device.
> 
> ALSA devices are in /dev/sound/.

A bit shorter, /dev/snd/.


Takashi
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Re: Getting alsa on Caanoo

[Clemens Ladisch]

Marc Nostromo [M-.-n] wrote:
> > The alsa-driver package has the snddevices script, but it works only if
> > the kernel was compiled without CONFIG_SND_DYNAMIC_MINORS.
>
> So I should be able to use it to create the devices ?

Yes.


Regards,
Clemens