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void  OSTaskCreate (OS_TCB        *p_tcb,

                    CPU_CHAR      *p_name,

                    OS_TASK_PTR    p_task,

                    void          *p_arg,

                    OS_PRIO        prio,

                    CPU_STK       *p_stk_base,

                    CPU_STK_SIZE   stk_limit,

                    CPU_STK_SIZE   stk_size,

                    OS_MSG_QTY     q_size,

                    OS_TICK        time_quanta,

                    void          *p_ext,

                    OS_OPT         opt,

                    OS_ERR        *p_err)

Description

Tasks must be created in order for µC/OS-III to recognize them as tasks. You create a task by calling OSTaskCreate() and by providing arguments specifying to µC/OS-III how the task will be managed. Tasks are always created in the ready-to-run state.

Tasks can be created either prior to the start of multitasking (i.e., before calling OSStart()), or by a running task. A task cannot be created by an ISR. A task must either be written as an infinite loop, or delete itself once completed. If the task code returns by mistake, µC/OS-III will terminate the task by calling OSTaskDel((OS_TCB *)0, &err)). At Micrium, we like the “while (DEF_ON)” to implement infinite loops because, by convention, we use a while loop when we don’t know how many iterations a loop will do. This is the case of an infinite loop. We prefer to use for loops when we know how many iterations a loop will do.

Files

os.h/os_task.c

Prototype

Task as an infinite loop:

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