Installing Kernel Support (with Raspi-Config)
Run sudo raspi-config and follow the prompts to install i2c support for the ARM core and linux kernel
Go to Interfacing Options
Now reboot your Pi to make the SPI interface appear
Next time you log in you can check that you can see the devices with
ls -l /dev/spidev*
you should see two 'devices' one for each SPI bus
The /dev/spidev0.x will not show up when using the PiTFT screens as it is using the SPI interface.
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