[alsa-devel] capturing data from the microphone

[Raymond Yau]

arecord: pcm_read:1629: read error: Input/output error

This usually mean hardware interrupt did not not occur ( driver bug )


2010/1/6 Marc Garnier <marc.garnier at heig-vd.ch>

> Ok, let me go into details. I work on a custom device platform based on
> an Atmel at91sam9261. I wrote an alsa driver composed of 2 files
> (sound/soc/atmel/myplateform_q2686.c and sound/soc/codecs/q2686.c) and I
> also add this line into arch/arm/mach-at91/board-myplateform.c :
>
> at91_add_device_ssc(AT91SAM9261_ID_SSC0, ATMEL_SSC_TX | ATMEL_SSC_RX);
>
> When I boot my device I can see that :
> Q2686 SoC Audio Codec 0.2
> asoc: Q2686 <-> atmel-ssc0 mapping ok
> ALSA device list:
>  #0: MYPLATFORM (Q2686)
>
> And everything ok with playback :
> # aplay -c 1 tone.wav
>
> But when I want to record a pcm stream I have this error:
> # arecord -v -c 1 -t wav -f S16_LE -r 8000 -d 10 input.wav
> arecord: pcm_read:1629: read error: Input/output error
>
> Any more idea?
>
> Raymond Yau wrote:
> > which device are you using ?  ( pulseaudio , dmix or default device
> defined
> > in /usr/share/alsa/cards/*.conf )
> >
> > post output of
> >
> > arecord -v -c 1 -t wav -f S16_LE -r 8000 -d 10 input.wav
> >
> > 2010/1/5 Marc Garnier <marc.garnier at heig-vd.ch>
> >
> >
>