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FreeRTOSV7.4.0 Atmega32 running only one task

Posted by shoeb on April 13, 2013

I have created a couple of tasks to blink some LED's connected to output port of Atmega32. I am using STK500.

But I am able to run only one task. I am not sure the other task is even getting created. I checked with several stack sizes from minimal to 500 bytes for each task. Still does not help. I do not have any debugger to check the code at run time I am using AvrStudio 4.14 for development.

Appreciate all your help thanks...

RE: FreeRTOSV7.4.0 Atmega32 running only one task

Posted by Dave on April 13, 2013
Check the return value of xTaskCreate() to know if the task is being created, and invest in a debugger. I think you can run the code in the AVR simulator without a debugger.

RE: FreeRTOSV7.4.0 Atmega32 running only one task

Posted by shoeb on April 17, 2013
Thanks for replying,

I will be doing that. I checked with creating on only one task and it does what it is supposed to do.

Task 1 by itself toggles the LED's as it should. Task 2 by itself toggles as it should.

But when I want to create both of them only of them is created. I am not able to understand if I am overflowing the stack or is there something to do with the interrupts? Or am I missing any macro that I should configure before compiling.


RE: FreeRTOSV7.4.0 Atmega32 running only one task

Posted by shoeb on April 21, 2013

Both the tasks are created I verified using Simulation in AvrStudio debugger. But only one of them is running. The low priority task. Please help. The high priority task never seems to be executed.

RE: FreeRTOSV7.4.0 Atmega32 running only one task

Posted by Richard on April 22, 2013
Please first check that your tick interrupt is executing. You can do this quite simply by either setting a break point in vTaskIncrementTick() (in task.c) or by inspecting the xTickCount variable when the application has been running for a while. xTickCount should not be zero after a tick interrupt has executed.

If the tick interrupt is executing please post the outline of your tasks here.


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