Dig archives (old posts).
This problem has been reported earlier and fixed too
Thanks
--- Andy Ngo <[EMAIL PROTECTED]> wrote:
>
>
> Hi,
>
> I wonder if anyone can help me. I was able to use
> sound driver (GIT kernel 2.6.20 version) in full
> duplex mode on the DVEVM board with any problems (I
> can just do cat /dev/dsp > /dev/dsp and let it run
> forever without any issues). However, when I do
> this on our custom Davinci (which uses exactly the
> same codec (AIC33) as the DVEVM), it would stop
> after 3 to 5 minutes and won't work again until I
> reboot the custom board. I wrote a simple full
> duplex program:
>
> // init dsp
> openDsp();
>
> while (1)
> {
> bytes = read(dspFd, (char *)buffer,
> fragsize);
> if (bytes < 0)
>
> printf("error reading from mic\n");
> else
> printf("read %d bytes\n", bytes);
> wbytes = write(dspFd, buffer, fragsize);
> if (wbytes < 0)
> printf("error writing to speaker\n");
> else
> printf("wrote %d bytes\n", wbytes);
> }
>
> and it runs fine on the DVEVM. On our Davinci
> custom board, it would run for around 3-5 minutes
> and then seems to stop on the read (sampling from
> the mic); I don't get any errors but the read never
> returns. I'm trying to trace the problem; I assume
> the code is in sound/oss/davinci-audio-dma-intfc.c.
> Can anyone please recommend how I go about fixing
> this issue? Thanks.
>
> Regards,
> Andy
>
>
>
>
>
> > _______________________________________________
> Davinci-linux-open-source mailing list
> [email protected]
>
http://linux.davincidsp.com/mailman/listinfo/davinci-linux-open-source
>
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