I would appreciate the writeup, thank you. My project requires interfacing to an IC with I2S input. I planned on using (something like) aplay to write audio out to I2S/McASP channel (using built-in driver support) and hoped I could also use the built-in support (drivers) for SPI and/or I2C using the /dev/spidev<x.y> or /dev/i2c-<n> devices to control the IC.
On Monday, May 15, 2017 at 6:46:50 PM UTC-7, Graham wrote: > > Yes, I was able to get a CircuitCo Rev.B Audio cape running, using the > I2S/McASP interface. > I'll write it up for you, if you are interested. > > If you are going to use a different CODEC or other device on the I2S/McASP > interface, > you will need to see if a driver already exists for it, or if it fits a > generalized I2S audio interface that > is already inside the kernel can be invoked and controlled from a device > tree. > > If it is unique, then you will have to write your own Linux driver and > recompile the kernel. > > If you just want audio, it is a lot easier to just use a USB CODEC. > > --- Graham > > == > > On Monday, May 15, 2017 at 6:11:11 PM UTC-5, ags wrote: >> >> I'm also interested as I have a project where I will interface directly >> to the I2S/McASP interface. Did you figure it out? >> >> >> On Tuesday, January 3, 2017 at 8:57:29 AM UTC-8, Graham wrote: >>> >>> I spent most of the weekend down in the rabbit-hole, trying to get a >>> CircuitCo Rev_B Audio cape to work, (unsuccessfully.) >>> >>> Is this cape compatible-with / supported-by Debian 8.6/kernel 4.4 ? >>> >>> Does the BB-BONE-AUDI-02-00A0.dtbo overlay that comes with the current >>> distribution work? >>> >>> How can you tell if an overlay actually loaded, with 4.4? >>> /sys/devices/platform/bone_capemgr/slots >>> as well as the boot log, only shows the first physical four, and no >>> longer shows the higher numbered "pseudo-capes" and overlay status. >>> >>> I understand that >>> The CircuitCo cape does not have an EEPROM, so everything needs to be >>> configured explicitly. >>> I need to use a base .dts with HDMI audio disabled, then load the >>> overlay for the CircuitCo card. >>> I also need to load the asound.state file. >>> >>> Am I approaching this correctly? >>> >>> I can not use a USB-soundcard for audio. I have several applications >>> that need McASP/I2S running for several other codecs, but I thought I >>> would start >>> with the CircuitCo cape as a starting point. >>> >>> Thanks, >>> --- Graham >>> >>> == >>> >>> -- 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. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/a4486923-19cb-4a24-aa39-6a54d96a5d01%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
