CapacitiveSensor library with Attiny 3217

restt · January 29, 2020, 5:44pm

Hi everybody,
I'm trying to make some touch sensor to control some LED's. Tried the code in Arduino Nano/Uno/Mega, everything fine. My issue though happened when i wanted to make it work on Attiny 3217. I'm using the CapacitiveSensor Library, and after looking at the header file there is no definition for the Attiny 3217.

Any Help will be welcomed.

pert · January 29, 2020, 8:10pm

restt:
after looking at the header file there is no definition for the Attiny 3217.

Sure there is:

github.com

PaulStoffregen/CapacitiveSensor/blob/master/CapacitiveSensor.h#L41


      
          #define CapacitiveSensor_h
          
          #if ARDUINO >= 100
          #include "Arduino.h"
          #else
          #include "WProgram.h"
          #endif
          
          // Direct I/O through registers and bitmask (from OneWire library)
          
          #if defined(__AVR__)
          #define PIN_TO_BASEREG(pin)             (portInputRegister(digitalPinToPort(pin)))
          #define PIN_TO_BITMASK(pin)             (digitalPinToBitMask(pin))
          #define IO_REG_TYPE uint8_t
          #define DIRECT_READ(base, mask)         (((*(base)) & (mask)) ? 1 : 0)
          #define DIRECT_MODE_INPUT(base, mask)   ((*((base)+1)) &= ~(mask), (*((base)+2)) &= ~(mask))
          #define DIRECT_MODE_OUTPUT(base, mask)  ((*((base)+1)) |= (mask))
          #define DIRECT_WRITE_LOW(base, mask)    ((*((base)+2)) &= ~(mask))
          #define DIRECT_WRITE_HIGH(base, mask)   ((*((base)+2)) |= (mask))
          
          #elif defined(__MK20DX128__) || defined(__MK20DX256__) || defined(__MK66FX1M0__) || defined(__MK64FX512__)

#if defined(__AVR__)

ATtiny3217 is an AVR, so the AVR macro is defined when you are compiling for ATtiny3217.

Have you tried using the library? Did you have any problems? If so, please provide a detailed description.

restt · January 30, 2020, 9:20am

i did tried it on the Attiny3217 but for some reason its not working properly(i don't get any error after compiling), the reading values are 0.
But i used another library which i found on Github : GitHub - moderndevice/CapSense: Simple Capacitive Sensing for Arduino and AVR microcontrollers.
it works with it, the only thing is that it is more noisy, the values peak a lot compared to the other library (test made on arduino nano), but i guess with an average function it should be ok.

I'm still interested though, to know why the CapcitiveSensor library is not working properly.

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CapacitiveSensor library with Attiny 3217

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