I need to install i2c-tools on my Raspberry Pi, but I'm running into a mountain of troubles.
I've tried multiple variations to install, mostly similar to this one from spkang.co.uk
but without any luck. Upon running sudo apt-install i2c-tools, I get the error message /run/udev or .udevdb or .udev presence implies active udev. Aborting MAKEDEV invocation.
sudo nano /etc/modprobe.d/raspi-blacklist.conf is completely empty and there are no references to i2c in neither the alsa-base-blacklist.conf nor the fbdev-blacklist.conf in the same location.
/etc/modules shows just two kernel modules (snd-bcm2835 and i2c-dev)
pi is added to the i2c group
sudo i2cdetect -y 0 and sudo i2cdetect y 1 both produce the same error Error: Could not open file '/dev/i2c-0' or '/dev/i2c/0': No such file or directory. Of course, the /dev/i2c* are not present on the system.
Can somebody point me in the right direction? I'm using a wheezy 7.8 image that came with a lcd touchscreen. The results of uname -a are Linux raspberrypi 3.18.9-v7 #27 SMP PREEMPT Sun Oct 4 23:57:41 CST 2015 armv7l GNU/Linux.
From /boot/config.txt I've added the following lines:
dtparam=spi=on
dtparam=i2c_arm=on
#device_tree=bcm2708-rpi-b.dtb
device_tree_param=i2c1=on
device_tree_param=spi=on
The line I commented out was removed because the pi would not boot with this line present.
Thanks in advance for saving me from the insanity.
I had the same trouble. I add only these lines to the /boot/config.txt
dtparam=i2c1=on
dtparam=i2c_arm=on