I2C bus control using Qt/Qml

Nilesh Prakash Kokane

Hi ,

I managed to cross compile i2c-tools for my i.mx board. But doesn't have an idea how to control the bus through it.

can anyone please provide qt reference code for i2c.

Br
Nilesh

jazzycamel

i2c-tools is a set of command line tools for interfacing with I2C bus, not an API. It does however use the i2c-dev.h which has methods for the SMBus protocol and is nicely documented "here":https://xgoat.com/wp/2007/11/11/using-i2c-from-userspace-in-linux/.

However as the I2C bus, like most devices, is mapped into the file system you can actually just read from/write to it using standard (or Qt) file operations. Look in your '/dev/' directory for filenames starting with 'i2c-', for example:

$ ls /dev/ | grep 'i2c-'

Look "here":http://elinux.org/Interfacing_with_I2C_Devices for an example of how to open, gain control, read and write to this 'file'.

Hope this helps ;o)

Nilesh Prakash Kokane

Hi jazzycamel ,

Perfect, That will help me a lot.

Thanks for your suggestion..

Br
Nilesh