Debian 8.3: VError: Write to CapeMgr slots failed: EEXIST, file already exists

[Shadocko]

Hello,

I'm trying to use some of the HDMI pins in GPIO mode with an up-to-date debian 8.3 but have been unable to so far. In /boot/uEnv.txt, I have the following settings:

##BeagleBone Black: HDMI (Audio/Video) disabled:
dtb=am335x-boneblack-emmc-overlay.dtb

cmdline=coherent_pool=1M quiet cape_universal=enable

After booting, I get the following cape overlay:

cat /sys/devices/platform/bone_capemgr/slots
 0: PF----  -1
 1: PF----  -1
 2: PF----  -1
 3: PF----  -1
 4: P-O-L-   0 Override Board Name,00A0,Override Manuf,univ-emmc

The pins can seemingly be interacted with using config-pin:

root@beaglebone:~# config-pin -l P9.29
default gpio gpio_pu gpio_pd pwm spi pruout pruin
root@beaglebone:~# config-pin P9.29 pwm
root@beaglebone:~#

However, I'm unable to load octalbonescript in this setup:

/usr/local/lib/node_modules/octalbonescript/lib/bone.js:205
                throw new verror(err2, 'Write to CapeMgr slots failed');
                      ^
VError: Write to CapeMgr slots failed: EEXIST, file already exists
    at onWriteSlots (/usr/local/lib/node_modules/octalbonescript/lib/bone.js:205:23)
    at onReadSlots (/usr/local/lib/node_modules/octalbonescript/lib/bone.js:196:17)
    at readSlots (/usr/local/lib/node_modules/octalbonescript/lib/bone.js:176:13)
    at Object.module.exports.load_dt_sync (/usr/local/lib/node_modules/octalbonescript/lib/bone.js:167:9)
    at Object.<anonymous> (/usr/local/lib/node_modules/octalbonescript/index.js:47:18)
    at Module._compile (module.js:456:26)
    at Object.Module._extensions..js (module.js:474:10)
    at Module.load (module.js:356:32)
    at Function.Module._load (module.js:312:12)
    at Module.require (module.js:364:17)

If I disable the univ-emmc dto and instead use the default cape-univeraln one, octalbonescript will cause cape-hdmi to be loaded and will error on my attempt to use P9_29 as digital out. How can the HDMI and MCASP pins be used with octalbonescript?

[Andrewiski]

try setting AUTO_LOAD_CAPE so octalbone doesn't try to autoload the cape

sudo DEBUG=bone AUTO_LOAD_CAPE=0 node app.js

[fafamendes]

Hi Andrewiski,

Thanks for the solution! Would have some way to definitely solve?