Detect version 1 or version 2 Pi

Question

I'm writing a small application that could run on version one Pi ( mine ) or a version two ( co-workers ) that uses the I2C bus.

Since the I2C bus is different depending on the version, I was wondering how I programmatically detect which is which so neither of us have to mess with changing any settings when we

• xxmbabanexx: It seems like your question was cut off halfway. I recommend editing this post.
• xxmbabanexx: It seems that the bus is selected through the /etc/modprobe.d/raspi-blacklist.conf file. I assume that you could check which one was commented out?

Answer 1

Gordon Henderson's wiringPi project includes a function piBoardRev which does what you want; looking at the code, it checks /proc/cpuinfo for a "Revision" line and works on that, so you might find it easier to do the same yourself.

There's a discussion on the Raspberry Pi Forum.