IO DeviceAnything related to IO and GPIO Device Test and Sampleidle3 run as root
I2C Installation for Raspberry Pi – Step by Step Guide07/08/2012
This is a step by step guide on installation I2C driver for the Raspberry Pi. It is for the Raspbian image. Make sure your Raspberry Pi is connected to the internet when installing the drivers. The new Raspbian distro already have the I2C driver installed but they are disabled by default. To enable it all you need to do is comment out a line by putting # in front. At the prompt type. sudo nano /etc/modprobe.d/raspi-blacklist.conf
then add a # on the 3rd line. Press CTRL X then y to save and exit. Next edit the modules file by: sudo nano /etc/modules
Add i2c-dev to a new line. Press CTRL X then y to save and exit. Now install the i2c-tools package by: sudo apt-get install i2c-tools
If you get a 404 error do an update first: sudo apt-get update
then run the install the i2c-tools again. Note : The installation could take a few minutes to do, depend on how busy the server is. Now add a new user to the i2c group: sudo adduser pi i2c
Reboot the machine by: sudo shutdown -r now
After the reboot test to see any device connected by: sudo i2cdetect -y 0
If your board is the Rev 2 type this: sudo i2cdetect -y 1
You should see something like this: Next install the python-smbus python module: sudo apt-get install python-smbus
Now you are ready to use the i2c with python. Examplehttp://www.skpang.co.uk/blog/archives/454 Download the led chaser python file by: wget http://www.skpang.co.uk/blog/wp-content/uploads/2012/06/ledchaser.py
Change the file permission to allow execute: chmod 777 ledchaser.py
Run the example by: ./ledchaser.py
i2cdetect meansMeans : BUS number for Read and Write Address
Example
import smbus
import time bus = smbus.SMBus(0) address = 0x70 #SRF08 REQUIRES 5V def write(value): bus.write_byte_data(address, 0, value) return -1 def lightlevel(): light = bus.read_byte_data(address, 1) return light def range(): range1 = bus.read_byte_data(address, 2) range2 = bus.read_byte_data(address, 3) range3 = (range1 << 8) + range2 return range3 while True: write(0x51) time.sleep(0.7) lightlvl = lightlevel() rng = range() print lightlvl print rng
WebIOPiWebIOPi is developed and tested on Raspbian. You only need Python, either 2.7 or 3.2. Download, then extract and install WebIOPi. The setup script will automatically download and install required dependencies using apt-get. You may have to manually install GCC and Python development headers if you are not using Raspbian.Update note: Stop your existing WebIOPi service, then process with the setup. Your configuration will be kept but others files will be override. See downloads page to get latest package, and adapt x.y.z with the version you download. $ tar xvzf WebIOPi-x.y.z.tar.gz https://code.google.com/p/webiopi/wiki/INSTALL |