Thanks for answering! My goal is use the TI pcm1803 (i have this<https://www.sparkfun.com/products/9365> board) to capture 24 bit audio @48/96 kHz (the source will be a mems microphone). My doubt lies with the software, specifically I2S drivers. So i would like to know if i can use the same modules that my BeagleBone Audio Cape uses to capture the digital audio or i'll have to write a driver just as you did.
Hope you can clarify me these matters. Thanks! El lunes, 9 de diciembre de 2013 17:17:11 UTC-3, Seppo Nikkilä escribió: > > Hi ezequiel esteban, > <https://plus.google.com/u/0/115050451839690159366?prsrc=4> > > My drivers are for the mono DAC with 24-bit at 192 kS/s. > I also generate the x 256 system clock via I2S so the frequency is 49.152 > MHz. > This requires the adjustment of the processor voltage to gain the required > speed. > > What is your sample size and sampling rate? > > Botg ADC and DAC must be designed very carefully if your target is to work > with > over 20 real bits (in)accuracy. > > siñ > > > On Mon, Dec 9, 2013 at 9:44 PM, eze_rg <[email protected] > <javascript:>>wrote: > >> Hi, can you share some of the software drivers/hacks that you used to get >> the ADC to work properly? >> Thanks! >> >> El viernes, 15 de noviembre de 2013 12:51:30 UTC-3, Seppo Nikkilä >> escribió: >>> >>> A couple of years ago I designed and prototyped with the original >>> BeagleBoard a single channel 24-bit, 192 kS/s high-quality audio DAC and an >>> I2S driver for it. Works great. >>> The design is based in the TI PCM1792A chip >>> I am now planning to make it even better but have a few more urgent >>> projects ahead of it. >>> >>> I also designed a 24-bit, 192 kS/s single channel audio ADC board with a >>> phantom microphone power connection. >>> Built a few boards but never had the time to test them. The design is >>> based on the AKM AK5294A audio ADC. >>> >>> Both boards use the expansion pins of the original BB and a few software >>> tricks to get the necessary speed. >>> >>> I am willing to join a project aiming to 20+ bit real life performance >>> in digital audio. >>> If you talk about 32 bits, I am not interested... >>> >>> siñ >>> >>> >>> On Fri, Nov 15, 2013 at 3:27 PM, Gerald Coley >>> <[email protected]>wrote: >>> >>>> Audio on HDMI is an output only.It cannot receive data. >>>> >>>> Gerald >>>> >>>> >>>> >>>> On Fri, Nov 15, 2013 at 2:54 AM, <[email protected]> wrote: >>>> >>>>> Hi there! >>>>> >>>>> I am currently working on a project involving some audio processing. >>>>> An analog to digital stereo converter that can sample at 96k with 24-bit >>>>> resolution is being used in conjunction with an external microphone to >>>>> get >>>>> digital audio data. This converter outputs data using the I2S bus >>>>> specification (three pins: clock, word select, and data). My goal right >>>>> now is to get the data outputted from this external ADC onto the BBB and >>>>> stored in a file. My understanding is that the BBB supports I2S through >>>>> the usage of HDMI. Is it possible to do what I want using the built in >>>>> HDMI chip? If so, could you point me in the right direction to get this >>>>> working? Or will it be easier to write my own code to interface with I2S >>>>> using three GPIO pins? >>>>> >>>>> Thanks for any insight and help. >>>>> >>>>> Regards, >>>>> N0 Loggers >>>>> >>>>> -- >>>>> 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 [email protected]. >>>>> >>>>> For more options, visit https://groups.google.com/groups/opt_out. >>>>> >>>> >>>> -- >>>> 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 [email protected]. >>>> >>>> For more options, visit https://groups.google.com/groups/opt_out. >>>> >>> >>> >>> >>> -- >>> Developing next generation wireless audio >>> >> -- >> 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 [email protected] <javascript:>. >> For more options, visit https://groups.google.com/groups/opt_out. >> > > > > -- > Developing next generation wireless audio > -- 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 [email protected]. For more options, visit https://groups.google.com/groups/opt_out.
