Alexandre BOUIN wrote:
I'm working on an intern project, using an AT91SAM9260EK-based board, embedded system. Our kernel contains a full ALSA 1.14 with ASoC layer. Our ASoC driver works well in capture and playback, if we are using OSS layer or directly /dev/dsp. So I need some tips on ALSA layer side :
here you can see that my device is created : ll /dev/snd/ crwxrwxrwx 1 root root 116, 0 Dec 26 2007 controlC0 crwxrwxrwx 1 root root 116, 4 Dec 26 2007 hwC0D0 crwxrwxrwx 1 root root 116, 14 Dec 26 2007 pcmC0D0c crwxrwxrwx 1 root root 116, 16 Dec 26 2007 pcmC0D0p ll /dev/dsp crwxrwxrwx 1 root root 14, 3 Dec 26 2007 /dev/dsp
A cat on playback device works (I added some traces in kernel) : cat < /dev/snd/pcmC0D0p snd_pcm_open : enter snd_pcm_open_file : before snd_pcm_open_substream snd_pcm_open_file : after snd_pcm_open_substream cat: read error: Invalid argument
But a cat on capture device does not work : cat < /dev/snd/pcmC0D0c -sh: cannot open /dev/snd/pcmC0D0c: No such device
Does the capture device appear in /proc/asound/devices or in the output of "arecord -l"?
Regards, Clemens