Raspberry Pi uses the python quick2wire library to develop I2C applications

How to enable I2C device http://www.cnblogs.com/hangxin1940/archive/2013/04/02/2997077.html and build a python I2C Development Environment http://www.cnblogs.com/hangxin1940/archive/2013/04/03/2997094.html

Quick2wire is a python library used for I2C communication on Raspberry Pi. It allows non-root users to read and write gpio pins conveniently.

Why use it?

Some hardware devices have high permissions for Linux and can only be operated by the root user. Therefore, when developing these applications, you must have the root identity to read and write some hardware devices, this brings inconvenience. You Need To Know That * the root user is the root of all sins *. In case of root identity, leave the root user alone '#:/RM *', that's a pity.

# Preparations

Sudo apt-Get install git
Sudo apt-Get install python3
Sudo apt-Get install Python-pip
Sudo apt-Get install Python-virtualenv

# Install quick2wire-gpio-admin
The quick2wire-gpio-admin tool provides an easy way to enable/disable a gpio pin, which does not require the current user to have root privileges.

Download the source code of the uick2wire-gpio-admin in a proper location:

Wget https://github.com/quick2wire/quick2wire-gpio-admin/archive/master.zip

Or

Git clone https://github.com/quick2wire/quick2wire-gpio-admin.git

Decompress the downloaded ZIP file and enter the decompressed directory.

Compile and install

Make
Sudo make install

In this case, the installation is completed. It exists with the 'gpio-admin' command in the system.

Next, add the current PI user to the 'gpio' group.

Sudo adduser PI gpio

Log out and log on to the system to make sure that changes to the user group take effect immediately. For details about this command, go to the https://github.com/quick2wire/quick2wire-gpio-admin

# Install quick2wire-python-api
The quick2wire-python-api depends on the quick2wire-gpio-admin, and we have done it in the previous step.

This library allows developers to quickly connect to Raspberry Pi pins using python.

Download the source code of the quick2wire-python-api in a proper location:

Wget https://github.com/quick2wire/quick2wire-python-api/archive/master.zip

Or

Git clone https://github.com/quick2wire/quick2wire-python-api.git

Decompress the downloaded ZIP file and enter the decompressed directory.

Install this python Library

Python3 setup. py install

Now, all installation is complete.

For more detailed examples, check out the https://bitbucket.org/thinkbowl/i2clibraries

For more information, see:

Access gpio pin http://github.com/quick2wire/quick2wire-python-api/blob/master/doc/getting-started-with-gpio.md with quick2wire

Access I2C pin http://github.com/quick2wire/quick2wire-python-api/blob/master/doc/getting-started-with-i2c.md with quick2wire