Capacitive sense problem - STM32F0

[Ben Logan]

Posted on April 12, 2018 at 02:56

Hi there, 

I am attempting to implement capacitve touch sensing using basic touch keys with an stm32f051. I have generated the project with STM32cubeMX, so setup is all there. But, struggling to write code to perform an acquisition and read sensors.

What is the simplest code for main.c to read the sensors and light an LED for each touch sensor BTN when pressed?

[T J]

Posted on April 12, 2018 at 10:31

no experience directly, sorry for that.

but I know the track layout is critical for this function.

is this a custom board ?

[Max]

Posted on April 12, 2018 at 12:39

You may want to ha a look at the examples provided in the Cube package:

STM32Cube_FW_F0.zip\Projects\STM32F072B-Discovery\Applications

\TouchSensing

STM32Cube_FW_F0

.zip

\Projects\STM32072B_EVAL\Applications\TouchSensing

STM32Cube_FW_F0

.zip

\Projects\STM32091C_EVAL\Applications\TouchSensing

Best regards,

Max

[Ben Logan]

Posted on April 12, 2018 at 21:56

Yes, its for a custom board. The board is complete and track layout determined

[Ben Logan]

Posted on April 12, 2018 at 21:58

Ok thanks. I've reviewed the discovery application, but perhaps not the other two