Hi: Now my driver is working (just) a bit better, but is still not functional... when i try to play something it says: davinci_evm sound: ASoC: machine hw_params failed: -524 aplay: set_params:1297: Unable to install hw params: ACCESS: RW_INTERLEAVED FORMAT: S16_LE SUBFORMAT: STD SAMPLE_BITS: 16 FRAME_BITS: 32 CHANNELS: 2 RATE: 44100 PERIOD_TIME: (125011 125012) PERIOD_SIZE: 5513 PERIOD_BYTES: 22052 PERIODS: 4 BUFFER_TIME: (500045 500046) BUFFER_SIZE: 22052 BUFFER_BYTES: 88208 TICK_TIME: 0 Some hints or docummentation of this? remember i'm a noob Thanks > Message: 2 > Date: Tue, 5 Jan 2016 21:35:12 -0300 > From: Pablo Fonovich <pablo_f_7@xxxxxxxxxxx> > To: "alsa-devel@xxxxxxxxxxxxxxxx" <alsa-devel@xxxxxxxxxxxxxxxx> > Subject: PCM3168 alsa driver for beaglebone black > Message-ID: <BAY169-W8142231FA115FDA205200FEEF40@xxxxxxx> > Content-Type: text/plain; charset="iso-8859-1" > > Hi: > I'm working in a project of making an audio cape for beaglebone black with pcm3168 codec... so far i've written the driver i've attached based on pcm1681.c available in linux kernel. > Im a noob in this subjets, so i would like to know how can now make it work in my custom system for the beaglebone. > I followed the guide in this link http://processors.wiki.ti.com/index.php/Sitara_Linux_Audio_DAC_Example, but it makes me write the ops and hw structures that i already have in my pcm3168.c file, in the davinci_evm.c file. > > The drivers compiles and is detected at boot time, as it says in the guide. But when i type aplay command to play some wav, the message "ALSA lib pcm.c:2267:(snd_pcm_open_noupdate) Unknown PCM default > aplay: main:722: audio open error: No such file or directory" appears, so i'm missing something... > > I don't knwo if this post belongs to this list, but any help would be great... > If some docummentation about writing a driver for an embedded system is available, please tell me... > Also, if someone can suggest me some guidelines of work i would be grateful, cause i just can't get organized with the information i found > > Thanks very Much... > > Pablo > > > -------------- next part -------------- > An embedded and charset-unspecified text was scrubbed... > Name: pcm3168.c > URL: <http://mailman.alsa-project.org/pipermail/alsa-devel/attachments/20160105/f0bcc63c/attachment-0001.c> > _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
