I would like to change i2c bus frequency in order to allow for slightly longer cables.
I am using python-smbus package and it does work very well, however, I am unable to find how to set the bus frequency.
I have looked through the docs but was unable to find anything even remotely related to setting bus parameters.
Is that anything that could be done in python or do I need something lower level?
I am using Raspberry PI, which is an ARM architecture.
On the Raspberry Pi with the latest Jessie image, you can use this to check the current I2C frequency:
sudo cat /sys/module/i2c_bcm2708/parameters/baudrate.
To change the frequency, you can add/change this parameter:
dtparam=i2c_baudrate=50000
(replace 50000 with the desired frequency) in:
/boot/config.txt
and reboot to change the frequency.