Outline

Wakeup task.

C format

 ER      wup_tsk (ID tskid);

 ER      iwup_tsk (ID tskid);

Parameter(s)

I/O	Parameter	Description
I	ID tskid;	ID number of the task to be woken up. TSK_SELF: Invoking task. Value: ID number of the task to be woken up.

Explanation

These service calls cancel the WAITING state (sleeping state) of the task specified by parameter tskid.

As a result, the target task is moved from the sleeping state to the READY state, or from the WAITING-SUSPENDED state to the SUSPENDED state.

If the target task is in a state other than the sleeping state when this service call is issued, this service call does not move the state but increments the wakeup request counter (by added 0x1 to the wakeup request counter).

Note The wakeup request counter managed by the RI850V4 is configured in 7-bit widths. If the number of wakeup requests exceeds the maximum count value 127 as a result of issuing this service call, the counter manipulation processing is therefore not performed but "E_QOVR" is returned.

Return value

Macro	Value	Description
E_OK	0	Normal completion.
E_ID	-18	Invalid ID number. - tskid < 0x0 - tskid > Maximum ID number - When this service call was issued from a non-task, TSK_SELF was specified tskid.
E_CTX	-25	Context error. - This service call was issued in the CPU locked state.
E_OBJ	-41	Object state error. - Specified task is in the DORMANT state.
E_NOEXS	-42	Non-existent object. - Specified task is not registered.
E_QOVR	-43	Queue overflow. - Wakeup request count exceeded 127.