CODEWITHSUNDEEP
pythonraspberry-pii2c
ppersia37
ppersia37

Reputation: 52

Raspberry Pi 2 - cannot enable /dev/i2c-0

i have a problem with bit banging on raspberry pi 2 i have done all of these step :

*sudo nano /etc/modprobe.d/raspi-blacklist.conf  //#blacklist i2c-bcm2708

*sudo nano /etc/modules //Add the Line i2c-dev at the end of the file. *Edit the /boot/cmdline.txt file: sudo nano /boot/cmdline.txt //At the end of the line add bcm2708.vc_i2c_override=1 and when i run ls /dev/i2c* i get only /dev/i2c-1. any ideas? im using Raspberry pi 2.thanks

I'm expecting to see /dev/i2c-1 and /dev/i2c-0 instead of only /dev/i2c-1.

Upvotes: 1

Views: 5982

Answers (1)

Krystian Sakowski
Krystian Sakowski

Reputation: 1653

You have to add

dtparam=i2c_vc=on

to

/boot/config.txt

by nano for example

sudo nano /boot/config.txt

Then I can see both i2c interfaces on my Raspberry Pi 2 running Debian Wheezy version.

Later on you can have a problem with detecting i2c devices on the bus. Please take a look to this thread on Raspberry Pi official forum with next steps. i2c-0 on Raspberry Pi 2 Model B

Those gpios don't have external pull ups to 3V3. They will default to the internal 50k pull-ups to 3V3 but they not be sufficient to drive the bus. I'd try adding a 2k pull up to 3V3 on each pin (i2c-1 has external 1k8 pull-ups to 3V3).

Upvotes: 5

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