I'm looking for some help getting the audio cape rev. B1 running on debian. I'm not able to load the overlay, I suspect I'm using the wrong kernel or need to compile the firmware into the kernel.
Circuitco provided an overlay, I have the latest image I can find, BBB-eMMC-flasher-debian-7.4-2014-04-23-2gb.img I downloaded the overlay here: http://elinux.org/CircuitCo:Audio_Cape_RevB >From above link: "The device tree overlay is available at the bottom of this page. ... The current Debian images have the required patches and will play audio normally." I compiled the overlay on the board with this command #dtc -o dtb -o BB-BONE-AUDI-02-00A0.dtbo -b 0 -@ BB-BONE-AUDI-02-00A0.dts and put it in /lib/firmware root@beaglebone:~# echo BB-BONE-AUDI-02 > /sys/devices/bone_capemgr*/slots -bash: echo: write error: Invalid argument dmesg output: [ 290.610210] bone-capemgr bone_capemgr.9: part_number 'BB-BONE-AUDI-02', version 'N/A' [ 290.612723] bone-capemgr bone_capemgr.9: slot #7: generic override [ 290.612784] bone-capemgr bone_capemgr.9: bone: Using override eeprom data at slot 7 [ 290.612836] bone-capemgr bone_capemgr.9: slot #7: 'Override Board Name,00A0,Override Manuf,BB-BONE-AUDI-02' [ 290.613099] bone-capemgr bone_capemgr.9: slot #7: Requesting part number/version based 'BB-BONE-AUDI-02-00A0.dtbo [ 290.613153] bone-capemgr bone_capemgr.9: slot #7: Requesting firmware 'BB-BONE-AUDI-02-00A0.dtbo' for board-name 'Override Board Name', version '00A0' [ 290.617371] bone-capemgr bone_capemgr.9: slot #7: dtbo 'BB-BONE-AUDI-02-00A0.dtbo' loaded; converting to live tree [ 290.617415] Invalid device tree blob header [ 290.622050] bone-capemgr bone_capemgr.9: slot #7: Failed to unflatten I tried to disable HDMI but that didn't help. This blog post mentions a possible bug that makes it necessary compile a kernel or change a setting to get loadable overlays. Is that the case here? http://hipstercircuits.com/enable-device-tree-overlay-on-startup-on-beaglebone-black/ Thanks, Aaron -- 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/d/optout.
