ESP32 - A simple class with a member that is a freertos task.

classTest.ino

/* http://www.learncpp.com/cpp-tutorial/812-static-member-functions/ */

#include "myClass.h"

void setup() { 
  xTaskCreatePinnedToCore(
                    myClass::myFunction,          /* Task function. */
                    "myFunction",                 /* String with name of task. */
                    10000,                        /* Stack size in words. */
                    NULL,                         /* Parameter passed as input of the task */
                    1,                            /* Priority of the task. */
                    NULL,                         /* Task handle. */
                    1);
  
}

void loop() {
  // put your main code here, to run repeatedly:
  vTaskDelay( 500 );
}

myClass.cpp

#include "myClass.h"
#include "esp32-hal-gpio.h"
#include "esp_log.h"
#include <FreeRTOS.h>

void myClass::myFunction( void * parameter )
{
  const uint8_t builtin_led = 2;
  pinMode( builtin_led, OUTPUT );
  while (1)
  {
    //a function;
    const char * TAG = "myFunction";
    ESP_LOGI( TAG, "My function" );
    digitalWrite( builtin_led, !gpio_get_level( gpio_num_t( builtin_led ) ) );
    vTaskDelay( 500 );
  }
}

myClass.h

#ifndef MyClass_h
#define MyClass_h

class myClass
{
  public:
    static void myFunction( void * parameter );
};

#endif