ESP32 Dual Core Stack Size

[mihmansaye]

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1.  
2. How should I choose the stack size? And how many bytes is the maximum stack size? Is what is called a stack actually RAM?
3.  
4. Serial.println(String(ESP.getHeapSize() / 1024) + " Kb"); the total stack size I learned with this code?
5.  

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1.  
2. TaskHandle_t Task1;
3. TaskHandle_t Task2;
4.  
5. // LED pins
6. const int led1 = 2;
7. const int led2 = 4;
8.  
9. void setup() {
10.   Serial.begin(115200);
11.   pinMode(led1, OUTPUT);
12.   pinMode(led2, OUTPUT);
13.  
14.   //create a task that will be executed in the Task1code() function, with priority 1 and executed on core 0
15.   xTaskCreatePinnedToCore(
16.                     Task1code,   /* Task function. */
17.                     "Task1",     /* name of task. */
18.                     10000,       /* Stack size of task */
19.                     NULL,        /* parameter of the task */
20.                     1,           /* priority of the task */
21.                     &Task1,      /* Task handle to keep track of created task */
22.                     0);          /* pin task to core 0 */                  
23.   delay(500);
24.  
25.   //create a task that will be executed in the Task2code() function, with priority 1 and executed on core 1
26.   xTaskCreatePinnedToCore(
27.                     Task2code,   /* Task function. */
28.                     "Task2",     /* name of task. */
29.                     10000,       /* Stack size of task */
30.                     NULL,        /* parameter of the task */
31.                     1,           /* priority of the task */
32.                     &Task2,      /* Task handle to keep track of created task */
33.                     1);          /* pin task to core 1 */
34.     delay(500);
35.  
36.  
37. Serial.println(uxTaskGetStackHighWaterMark(Task1));
38. Serial.println(uxTaskGetStackHighWaterMark(Task2));
39.  
40. }
41.  
42. //Task1code: blinks an LED every 1000 ms
43. void Task1code( void * pvParameters ){
44.   Serial.print("Task1 running on core ");
45.   Serial.println(xPortGetCoreID());
46.  
47.   for(;;){
48.     digitalWrite(led1, HIGH);
49.     delay(1000);
50.     digitalWrite(led1, LOW);
51.     delay(1000);
52.   }
53. }
54.  
55. //Task2code: blinks an LED every 700 ms
56. void Task2code( void * pvParameters ){
57.   Serial.print("Task2 running on core ");
58.   Serial.println(xPortGetCoreID());
59.  
60.   for(;;){
61.     digitalWrite(led2, HIGH);
62.     delay(700);
63.     digitalWrite(led2, LOW);
64.     delay(700);
65.   }
66. }
67.  
68. void loop() {
69.  
70. }
71.  

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[mikemoy]

To find out how much stack your using for a Task, look into uxTaskGetStackHighWaterMark()
This will tell you if you need to increase it or not.