Core panic ->dump of ESP32 when calling function in Interrupt

Advanced Solutions
,
9

I’m trying to reproduce your problem in a minimal example but it won’t crash.

#include <Arduino.h>
#include <ESP32TimerInterrupt.h>
#define TIMER0_INTERVAL_MS 1

volatile int32_t encoderValueleft;
volatile int32_t encoderValueright;

ESP32Timer ITimer0(0);

void IRAM_ATTR sub_function_1() {
    encoderValueleft += 1; 
}

void IRAM_ATTR sub_function_2() {
    encoderValueright += 1; 
}

void IRAM_ATTR TimerHandler0(void)
{
    sub_function_1();
    sub_function_2();
}

void setup()
{
    Serial.begin(115200);
    Serial.println("CPU Frequency in MHZ:");
    Serial.println(getCpuFrequencyMhz());

    // Timer setup
    ITimer0.attachInterruptInterval(TIMER0_INTERVAL_MS * 1000, TimerHandler0);
}

void loop()
{
    Serial.println("Still alive, left = " + String(encoderValueleft) + " right = " + String(encoderValueright));
    delay(1000);
}

has serial output

CPU Frequency in MHZ:
240
Still alive, left = 0 right = 0
Still alive, left = 1000 right = 1000
Still alive, left = 2000 right = 2000
Still alive, left = 3000 right = 3000

Exactly as I expect.

That is, I can call sub-functions from the ISR just fine when they’re marked with IRAM_ATTR.

Let me try reconstructing your code.