c++ - Unable to run OpenCV code from beaglebone -


i trying run program using opencv in beaglebone black described @ end of link https://solarianprogrammer.com/2014/04/21/opencv-beaglebone-black-ubuntu/

i had compilation issues resolved using 

g++ `pkg-config --cflags --libs opencv` test_2.cpp -o test_2

it compiles, when try run using

./test_2

i error:

cmem error: init: failed open /dev/cmem: 'no such file or directory'

the cmemk kernel module not appear installed.

commands such following run root install cmemk , allow opencl proceed properly.

for available cmem ddr block size: ~512mb: modprobe cmemk phys_start=0xa0000000 phys_end=0xc0000000 pools=1x536870912 allowoverlap=1

i not sure why getting this, , i've been unable resolve few days already. please guide me right direction.

regards

so, had same problem (running latest debian release on beaglebone site - 8.5).

i found link here - suggested these things: 

for older images this:  sudo apt-get update sudo apt-get upgrade  sudo apt-get remove dkms --purge  #get rid of dkms/etc..  cd /opt/scripts/tools/ git pull sudo ./update_kernel.sh sudo reboot  cd /usr/share/ti/examples/opencl/float_compute/ sudo make sudo modprobe cmemk sudo ./float_compute

now, update_kernel.sh didn't work (grep breaks on last update-initramfs), tried installing initramfs-tools, still didn't work... commented out. after rebooting, tried find opencvl/float_compute folder... didn't exist ran code , hoped best , worked.

so, suggestion do:

sudo apt-get update sudo apt-get upgrade  sudo apt-get remove dkms --purge  #get rid of dkms/etc..  cd /opt/scripts/tools/ git pull sudo apt-get install initramfs-tools

then edit update_kernel commenting out update-initramfs -uk ${latest_kernel} line in third_party_final() method (just add # in front of line). do:

sudo ./update_kernel.sh sudo reboot

installing initramfs-tools might not necessary, i'm not sure. have feeling actual solution remove dkms or update of kernel, again, not sure. can doing of worked me.


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