On Wed, Jan 22, 2014 at 10:49 PM, Eric Fort <[email protected]> wrote:
> It seems I2S is limited to 2 channels on the bus. Can mcasp be used > to handle a greater number of audio inputs and outputs than a single > I2S channel. What I'd like to do is have a mic in, headphone/line > out, bluetooth in/out, and an aux in/out (probably tied to a cellular > module) and maybe even an aux2 in/out tied to some other audio > source/sink. ideally 16 channels of audio half in each direction all > under control and routing of ALSA. Is this possible and if so how > might it be acomplished on the beagle bone? > > Talking purely from the hardware perspective, mcasp supports TDM format and each serializer of the mcasp can be independently configured for input or output. So what you are looking for looks possible in theory. There are certain restrictions that you would need to consider when considering the beaglebone as the base. There are two mcasp instances and each has 4 serializers. Are all of these available? If not, would multiple TDM slots work for you? Are the other restrictions outlined in the McASP section of the TRM acceptable? On the software side, the last time i looked the linux driver didn't support everything so you would possibly have to make some modifications in the driver too. You can always work with bare-metal code (Starterware) to prototype things if you find that simpler to get started with. -- 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.
