Sorry for not being clear, I'm writting a driver for an external codec to use instead of twl4030 not for the beagleboard I'll check the clocking, thanks. On Tue, Apr 7, 2009 at 5:19 PM, Mark Brown <broonie@xxxxxxxxxxxxx> wrote: > On Tue, Apr 07, 2009 at 12:18:25PM -0500, Ernesto Torres wrote: > > > Hi, i'm new to alsa and i would like some advice on where to get > information > > about writing an ASoC driver it would be for the beagle board, since is > the > > board i have available. I have already made some progress initializing > and > > There is already a drier for the Beagle board in the kernel - see the > omap3beagle driver. > > > I still don't know the exact way for playing via pcm with aplay or the > order > > of the callbacks. I have checked the web for info but not much about > ASoC, > > just the documentation with the linux kernel. > > ASoC jsust presents a standard sound card so applications such as aplay > work as they normally do. The callbacks are all called in the same > order as the standard ALSA equivalents are, you can check how exactly > things are mapped from the standard ALSA callbacks into ASoC in > soc-core.c. > > > My driver actually tries to play with aplay, but gets stuck in : > omap-pcm.c: > > omap_pcm_pointer > > It just won't send the frames. > > At a guess you've not got the clocking set up properly - either the pins > for the clock signals are not configured in the appropriate mode or an > inappropriate clock configuration has been set up in your machine > driver. > -- ___________ EhTd _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
