Hi Pablo, With McASP it is not possible to capture less than 2 channels. Try with -c 2 argument.
Best, Robin > On 7 janv. 2016, at 20:16, pablo7fonov...@gmail.com wrote: > > Hi Robin: > > I'm doing a similar project, but with a PCM3168 codec... I also followed the > guide http://processors.wiki.ti.com/index.php/Sitara_Linux_Audio_DAC_Example > <http://processors.wiki.ti.com/index.php/Sitara_Linux_Audio_DAC_Example> > Anyway there are lots of things that are not very clear for me... > <http://processors.wiki.ti.com/index.php/Sitara_Linux_Audio_DAC_Example> > > In my case, i use codec as clock slave, and synch, so the problem you had > should not affect to me... But when i try to record it says: > > arecord -D hw:0,0 -f S24_LE -c 1 -r 96000 -t wav test.wav > Recording WAVE 'test.wav' : Signed 24 bit Little Endian, Rate 96000 Hz, Mono > arecord: set_params:1239: Channels count non available > > Could you help me? > > On Sunday, May 24, 2015 at 4:38:43 AM UTC-3, Robin Scheibler wrote: > Dear all, > > I have created a custom cape around the STA321MP > <http://www.st.com/web/en/catalog/sense_power/FM125/CL935/SC534/PF251500d.d24> > chip from ST Microelectronics. It has 6 MEMS microphones and outputs them on > an I2S bus with 3 data lines. I am trying to use mcasp0 on the boneblack side > to receive the data. I am now to the point where the codec configuration > happens correctly (I can see the i2s signals with a logic analyzer) and a > soundcard is detected. However, when I try to record sound with arecord, I > get the following error: > > root@beaglebone:~# arecord -l > **** List of CAPTURE Hardware Devices **** > card 0: EVM [STA321MP EVM], device 0: STA321MP sta321mp-audio-0 [] > Subdevices: 1/1 > Subdevice #0: subdevice #0 > root@beaglebone:~# arecord -D hw:0,0 -f S24_LE -c 6 -r 44100 -t wav test.wav > Recording WAVE 'test.wav' : Signed 24 bit Little Endian, Rate 44100 Hz, > Channels 6 > arecord: pcm_read:1801: read error: Input/output error > > Let me know provide more details. > The codec is frame and bit clocks master > The connection to mcasp0 is the following: > Bit clock <=> P9_12 (mcasp0_aclkr_mux3) > Frame sync clock (L/R) <=> P9_27 (mcasp0_fsr) > Data <=> P9_28 (mcasp0_axr2) > Data <=> P9_30 (mcasp0_axr0) > Data <=> P9_25 (mcasp0_axr3) > I am using kernel 3.14.41 (because 3.8 doesn't have support for mcasp with >2 > channels) > I am using dtb-builder to add my device to the device tree > All the code I have added to the kernel (codec and machine code) and to the > device tree is on github. Here are the links to the specific changes I have > made. > > kernel: > https://github.com/fakufaku/linux/commit/3a6680960412ef0fc3fbcc6f2c0021350039cc92 > > <https://github.com/fakufaku/linux/commit/3a6680960412ef0fc3fbcc6f2c0021350039cc92> > device tree: > https://github.com/fakufaku/dtb-rebuilder/commit/127dbf3c82c78cc602058308ed72978b170c99a6 > > <https://github.com/fakufaku/dtb-rebuilder/commit/127dbf3c82c78cc602058308ed72978b170c99a6> > It is my first time trying to code audio driver so please be indulgent :) I > have spent a lot of time on this but it seems I am now completely stuck. I'd > really appreciate some help. I'd be happy to provide more clarifications on > anything. > > One thing I do not understand is if I need to add mixer bindings. And also > the audio routing (jack vs codec pins, etc). > > Thank you in advance! > Robin > > -- > For more options, visit http://beagleboard.org/discuss > <http://beagleboard.org/discuss> > --- > You received this message because you are subscribed to a topic in the Google > Groups "BeagleBoard" group. > To unsubscribe from this topic, visit > https://groups.google.com/d/topic/beagleboard/pptZ_9PTqMY/unsubscribe > <https://groups.google.com/d/topic/beagleboard/pptZ_9PTqMY/unsubscribe>. > To unsubscribe from this group and all its topics, send an email to > beagleboard+unsubscr...@googlegroups.com > <mailto:beagleboard+unsubscr...@googlegroups.com>. > For more options, visit https://groups.google.com/d/optout > <https://groups.google.com/d/optout>. -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
