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STM32FO  - How to activate a Driven/Active Shield for capacitive touch sensors?

Question asked by Ben Logan on May 3, 2018
Latest reply on May 8, 2018 by Ben Logan

Hi,

I'm having issues getting the driven shield to function on a custom board. I have initialized the ShieldIOs and SamplingIOs, and my cap touch buttons work fine. However, there is no output on the shield sampling capacitor or shield pin other than a bit of noise.

 

I don't think the issue is in the hardware. Tried a variety of sampling values, and different TSC group pins but still no luck.

 

There must be a problem in the firmware but I can't see it

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