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Analog Thumbstick and the Raspberry Pi

For a while now I have wanted to try using analog inputs with my Raspberry Pi. The Pi hardware only supports digital inputs, but it is also capable of communicating with expansion chips using an interface called Serial Peripheral Interface (SPI) . I decided to try my hand at getting a ThumbStick from a GamePad to work They are available for a few pounds from ebay and so would not require me to destroy an existing console controller.”

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