uCOS Start Functions

OSInit

OSInit()

• Creates the idle task and sets its priority to OS_LOWEST_PRIO.
• Optionally creates the statistic task and sets its priority to OS_LOWEST_PRIO-1.
• The idle and stat tasks are added to the TCB list.
• Creates the Free Pools
  • TCB Free List - OS_MAX_TASKS TCBs are added
  • Event Free List - OS_MAX_EVENTS events are added
  • Queue Free List - OS_MAX_QS queues are added
  • Flag Free List - OS_MAX_FLAGS flags are added
  • Mem Free List - OS_MAX_MEM_PART memory partions are added

OSStart

OSStart()

• At least one task must be create before calling OSStart()
• Set the High Ready to the highest ready task
  • OSPrioCur, OSPrioHighRdy - highest priority
  • OSTCBCur, OSTCBHighRdy - TCB of current task
• Runs highest task by calling OSStartHighRdy()
• Never returns
• Set OSRunning to TRUE

Example Main

void Main(void)
{
        InitHardware();
        OSInit();
        OSTaskCreat();
        OSStart();
}

void TaskOne()
{
        Timer_Init();
        // do stuff
}