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How do we use task construction for multi-task?

lee dw
Prodigy 150 points

I initialed  multi task like below, but GWtaskFxn does not operate, how can i use dual tasks on CC26xx EVK?

what is wrong? please help me.

 

Void main()

{  

Task_Params taskParams,taskParams1;

 

  // Configure task.  

Task_Params_init(&taskParams);  

taskParams.stack = myTaskStack;  

taskParams.stackSize = MSA_TASK_STACK_SIZE;

  taskParams.priority = 1;  

Task_construct(&myTask, taskFxn, &taskParams, NULL); 

 

  // Configure task.  

Task_Params_init(&taskParams1);  

taskParams1.stack = myGWTaskStack;  

taskParams1.stackSize = MSA_TASK_STACK_SIZE;  

taskParams1.priority = 2;  

Task_construct(&myGWTask, GWtaskFxn, &taskParams1, NULL);

 

  BIOS_start();     /* enable interrupts and start SYS/BIOS */

}

 

Void taskFxn(UArg a0, UArg a1) {  

  /* Initialize ICall module */

  ICall_init();

  /* Start tasks of external images */  

ICall_createRemoteTasks();  

  /* Kick off GW application */

  msa_task();    

}

Void GWtaskFxn(UArg a0, UArg a1) {  

  /* Initialize ICall module */

  ICall_init();

  /* Start tasks of external images */  

ICall_createRemoteTasks();  

  /* Kick off GW application */

  msa_GWtask();    

}

  • 0
    TI__Mastermind 30830 points
    1) When you say the GWtaskFxn "does not operate", does that mean you've set a breakpoint at GWtaskFxn and you never got there?
    2) Do you have any other tasks of higher priority than 2 defined in your application? If so, are they every blocking so that lower priority tasks can run?
    3) Can you share the .cfg file you're using for this application?

    Alan
  • 0 in reply to lee dw
    TI__Mastermind 30830 points
    Where and how are myTaskStack and myGWTaskStack defined? What is the value of "MSA_TASK_STACK_SIZE"?
    Which version of TI-RTOS are you using?
  • 0 in reply to Alan DeMars
    Prodigy 150 points

    I am using like below..

    #define MSA_TASK_STACK_SIZE 704
    Task_Struct myTask;
    Char myTaskStack[MSA_TASK_STACK_SIZE];
    #if 1
    #define MSA_TASK_STACK_SIZE1 512//704
    Task_Struct myGWTask;
    Char myGWTaskStack[MSA_TASK_STACK_SIZE1];

    verision is 'tirtos_simplelink_2_11_01_09'.

    And, there is not other task to have more high priority.

  • 0 in reply to lee dw
    TI__Mastermind 30830 points

    Perhaps it's a typo but it looks to me like you used the wrong stack size macro for the gwTask.

    I mean, you used MSA_TASK_STACK_SIZE1 to define the stack array, but you used MSA_TASK_STACK_SIZE as the stackSize in the task params you passed to the Task_construct() call for the myGwTask task.

    Alan

  • 0 in reply to Alan DeMars
    Prodigy 150 points

    Thank you for your response.

    When i change the stack size to 704 both of them, i got the below buid error.

    Linking
    Error[Lp011]: section placement failed
              unable to allocate space for sections/blocks with a total estimated minimum size of 0x2457 bytes (max align 0x8) in <[0x200000c8-0x200027ff]> 
    (total uncommitted space 0x2434).
              Uncommitted:
                [0x200000c8-0x200027ff]: 0x2738
                [0x20000200-0x200027ff]: 0x23fc

    And then, when i change size 512 ,it doesn't occur.

    How can i change size to allocate space? where is configuration?

     

  • 0 in reply to lee dw
    TI__Mastermind 30830 points

    If you need more RAM for your task stacks, you might try reducing your heap size which is currently being set to 1924 bytes in your .cfg file:

          BIOS.heapSize = 1924;

    It is OK to set the stack size for the myGWTask task to 512 bytes.

    The problem in your code is in this line:

        taskParams1.stackSize = MSA_TASK_STACK_SIZE;   <---- Should be MSA_TASK_STACK_SIZE1

    Because you used the wrong stack size macro, you told Task_construct() that the size of the myGWTaskStack buffer is 704 bytes, but the myGWTaskStack array is really only 512 bytes. This will result in Task_construct() initializing memory outside the myGWTaskStack[] array, probably leading to a crash of the application.

    Alan