More than one task cannot be created in arduino micro.

[spoorthymb]

hi,
I am not able to create more than one task in arduino micro. i have used FreeRTOS example programs to start with the RTOS programming.

#include <Arduino_FreeRTOS.h>

//

void setup()
{

Serial.begin(9600);
Serial.println(F("In Setup function"));

/* Create two tasks with priorities 1 and 2. An idle task is also created,
which will be run when there are no tasks in RUN state */

xTaskCreate(MyTask2, "Task2", 64, NULL, 1, NULL);
xTaskCreate(MyTask1, "Task1", 64, NULL, 1, NULL);
//xTaskCreate(MyIdleTask, "IdleTask", 100, NULL, 0, NULL);
vTaskStartScheduler();
}

void loop()
{
// DO nothing
}

/* Task1 with priority 1 /
static void MyTask1(void pvParameters)
{
while(1)
{
Serial.println(F("Task1"));
//vTaskDelay(100/portTICK_PERIOD_MS);
delay(200);
}
}

/* Task2 with priority 2 /
static void MyTask2(void pvParameters)
{
while(1)
{
Serial.println(F("Task2"));
//vTaskDelay(150/portTICK_PERIOD_MS);
delay(100);
}
}

/* Idle Task with priority Zero /
static void MyIdleTask(void pvParameters)
{
while(1)
{
Serial.println(F("Idle state"));
delay(50);
}

above was the program i had used.

[feilipu]

You are not setting the Task Stack large enough. There is a configuration define for configMINIMAL_STACK_SIZE which is the smallest you can use.

Also, just for reference. The Idle Task is automatically defined by FreeRTOS, and in this library anything you put into the loop() function will be executed by the Idle Task. Task priority 0 is not the Idle Task.

[spoorthymb]

what is your configTOTAL_HEAP_SIZE ? it is not mentioned in the configuration document. I have commented Idle task, its not been used i.

[feilipu]

As noted in the README, the heap allocation is based on malloc() which takes its guidance from __malloc_heap_start and __malloc_heap_end. These values are provided for every AVR device automatically by avr-libc. When using malloc() there is no configTOTAL_HEAP_SIZE.

Also, please note that there no need to add vTaskStartScheduler() to your code. This function is already provided in the initVariant() function in this Library. You won't find it inserted in the example code provided.

[spoorthymb]

I was using freeRtos v8.3 so it was not working. i replaced it by version 9, now it is working. thanks for your help.

Spoorthy