ESP32 - using 2nd core

Projects Programming
3

ESP32 Arduino core from here:
https://github.com/espressif/arduino-esp32

by default runs the RF/radio/protocols on CORE0 while the Arduino code runs on CORE1. For most scenarios, this scheme works reasonably well.

I reworked Neil Kolban's example a few years ago for an article I wrote, I think it simplifies things la bit by using an Arduino multi-tab example:

/*
   This sketch runs the same load on both cores of the ESP32
   ArduinoIDE 1.8.5
   Linux Mint 18.3
    Sketch uses 162569 bytes (12%) of program storage space. Maximum is 1310720 bytes.
    Global variables use 11068 bytes (3%) of dynamic memory, leaving 283844 bytes for local variables. Maximum is 294912 bytes.
*/

#include <Streaming.h>  // Ref: http://arduiniana.org/libraries/streaming/
#include "Workload.h"   // a tab in this sketch
#include "Task1.h"      // ditto
#include "Task2.h"      // ditto

TaskHandle_t TaskA, TaskB;

void setup() {
  Serial.begin(115200);
  delay(500);  // small delay

  // Ref: http://esp32.info/docs/esp_idf/html/db/da4/task_8h.html#a25b035ac6b7809ff16c828be270e1431

  xTaskCreatePinnedToCore(
    Task1,       /* pvTaskCode */
    "Workload1", /* pcName */
    1000,        /* usStackDepth */
    NULL,        /* pvParameters */
    1,           /* uxPriority */
    &TaskA,      /* pxCreatedTask */
    0);          /* xCoreID */

  xTaskCreatePinnedToCore(
    Task2,
    "Workload2",
    1000,
    NULL,
    1,
    &TaskB,
    1);
}

void loop() {
  // This task will run in the ESP32 Arduino default context
  unsigned long start = millis();
  Serial << "Task 0 complete running on Core " << (xPortGetCoreID()) << " Time = " << (millis() - start) << " mS" << endl;
  ;
  delay(10);
}

DualCore.zip (2.2 KB)