Issues with the latest version of Raspbian jessie

[danbuntu]

The newer version of Raspbian have switched to using dttree when enabling SPI. When you do this upgrade this library stops working. Running the Read.py example just sits there.

[EECSdude]

Activity here: raspberrypi/linux#1547

but no solution yet.

[Jbithell]

+1 - Having huge issues with the latest release and SPI

[mab5vot9us9a]

If you take a look at Issue #1547, there is a workaround now!

When cloning the SPI-Py library, changing '.cs_change = 1' to '.cs_change = 0' (line 189 in spi.c) before running sudo python setup.py install fixes the issues I had. Alternatively you can also clone my fork of this library https://github.com/mab5vot9us9a/SPI-Py, so you don't have to make the changes yourself.

Also make sure you have the latest kernel (>= 4.4.14), because it fixes a bug in earlier versions (see Issue #1547).
You can check your version using:

uname -a | sed -E "s/.*([0-9]+\.[0-9]+\.[0-9]+)-v.*/\1/"

If you need to update your kernel, use sudo rpi-update. If it's not yet installed, do so using sudo apt-get install rpi-update.

[thijstriemstra]

@mab5vot9us9a's change was also fixed in SPI-Py master so that fork isn't necessary anymore.