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How to control an external digital potentiometer with the STM32F3DISCOVERY via SPI

Question asked by vergara.daniele on Jul 24, 2017
Latest reply on Jul 24, 2017 by AvaTar

Hi guys,
I need to control an external digital potentiometer (setting the variable resistance wiper position) with a STM32F3DISCOVERY MCU, via SPI interface.
The digital potentiometer is an AD5293.

I just need to change the variable resistor wiper position. I don't need to read values from the external digital potentiometer, I just have to set the wiper position to a desired one and nothing more.

After setting up the SPI interface (using the MCU as the master), I need to fisically link the STM32F3 to the AD5293 to send the data input.

 

My question is:

which pin (or pins) of the STM32F3 should I use to insert the wire to connect the two devices? 

Thank you in advance for your answers!

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