CCS/TI-RTOS-MCU: Problem with hardware initialization tasks

Tool/software: Code Composer Studio

Hello, I'm having some problems with initializing hardware with tasks. I have these two tasks which will initialize the SPI and a Timer working as an interruption source. I want to run these tasks only once, so I'm putting them at a really high priority and then calling Task_exit() in the end to delete them later on.
It's not working very well as this code is giving me a gigantic negative number for the priority of the SPI task in ROV. Also, if I run only the timer task, it never terminates and I don't know why (it should, right? Even without the Task_exit()).


I'm using the blestack with another thread with is executing with the lowest priority next to Idle, which runs my bluetooth application - that in turn relies on the timer and spi -. Can anyone help out? Thanks.

/* TIMER TASK */
#define TIMER_TASK_PRIORITY 6
#define TIMER_TASK_STACK_SIZE 512

/*SPI TASK*/
#define SPI_TASK_PRIORITY 7
#define SPI_TASK_STACK_SIZE 512

...

void spiCreateTask(void){

    Task_Params taskParams;

     Task_Params_init(&taskParams);
     taskParams.stack = spiTaskStack;
     taskParams.stackSize = SPI_TASK_STACK_SIZE;
     taskParams.priority = SPI_TASK_PRIORITY; //Same as before, defaults to some value in Task_construct

     spiTask = Task_create((Task_FuncPtr)spiConfigTaskFunction, &taskParams, NULL);

}

void timerConfigTaskFunction()
{
    DEBUG("TIMER TASK CONFIG FUNCTION");
    GPTimerCC26XX_Params params;
    GPTimerCC26XX_Params_init(&params);
    params.width          = GPT_CONFIG_16BIT;
    params.mode           = GPT_MODE_PERIODIC_UP;
    params.debugStallMode = GPTimerCC26XX_DEBUG_STALL_OFF;
    hTimer = GPTimerCC26XX_open(Board_GPTIMER0A, &params);
    if(hTimer == NULL) {
        Task_exit();
    }

    Power_setDependency(PowerCC26XX_XOSC_HF);
    Types_FreqHz freq;
    BIOS_getCpuFreq(&freq);

    GPTimerCC26XX_Value loadVal = freq.lo / 10000 - 1; //47999
    GPTimerCC26XX_setLoadValue(hTimer, loadVal);
    GPTimerCC26XX_registerInterrupt(hTimer, (GPTimerCC26XX_HwiFxn)timerCallback, GPT_INT_TIMEOUT);
    //GPTimerCC26XX_start(hTimer); Where to start?
    //System_printf("...")

    Task_exit();
}

void timerCreateTask(void)
{
  Task_Params taskParams;

  Task_Params_init(&taskParams);
  taskParams.stack = timerTaskStack;
  taskParams.stackSize = TIMER_TASK_STACK_SIZE;
  taskParams.priority = TIMER_TASK_PRIORITY; //Same as before, defaults to some value in Task_construct

  timerTask = Task_create((Task_FuncPtr)timerConfigTaskFunction, &taskParams, NULL);

  if (timerTask == NULL){
      System_abort("Error creating timer task.");
  }

}