ESP32 interrupts trigger on both rising and falling edges

Projects Programming
1

Hi all,

recently I bought a new ESP32 cause I hoped that it will be suitable for my robot car project. But when I tried to read my encoder's signal then it responded on both edges.
I am very disappointed, because it is working on ESP8266 but with 32 it's not.

Here is my code where I only use one button:

#include <Arduino.h>

void blink();
byte ledPin = 2;
/* pin that is attached to interrupt */
byte interruptPin = 12;
/* hold the state of LED when toggling */
volatile byte state = LOW;

void setup() {
  pinMode(ledPin, OUTPUT);
  /* set the interrupt pin as input pulldown*/
  pinMode(interruptPin, INPUT_PULLDOWN);
  /* attach interrupt to the pin*/
  attachInterrupt(digitalPinToInterrupt(interruptPin), blink, RISING);
}

void loop() {
}

/* interrupt function toggle the LED */
void blink() {
  state = !state;
  digitalWrite(ledPin, state);
}

It is a very simple code, I just wanted to test the interrupts.
I hope anyone can help me to solve my problem.

Thank you in advance!

2

What signal do you use to test this? Did you check with a scope/logic analyzer? Do you use the newest ESP32 core (1.0.4)?
I don't have the hardware here to test this but if the hardware really acts as you said the error is probably in the ESP SDK.