How to reset an Event

River Liu

Intellectual 365 points

Hello,

In task1 there is an event pending like below,

Event_pend(event_tx, Event_Id_00 + Event_Id_03, Event_Id_NONE, BIOS_WAIT_FOREVER);

However ocasionally I need resync&re-start the task and I have to reset the event in task2.

How can I do that since BIOS user guide notes us that Only a single Task can pend on an Event object at a time?

In my case I use below code in task2 to reset the event (only event_id_03 might be set when resetting),

Event_pend(event_tx, Event_Id_03, Event_Id_NONE, BIOS_NO_WAIT);

It works however I am afraid there is potential problem in it.

B.R.

River Liu

over 12 years ago

0 ToddMullanix over 12 years ago

TI__Guru* 96960 points

You can

1. use a timeout in the Event_pend

2. Add another event_id. Post it when you need to restart. After the Event_pend to can check for that id and act accordingly.

fyi: there was no "code below" in your post.

Todd

0 River Liu over 12 years ago in reply to ToddMullanix

Intellectual 365 points

Todd,

Thanks, the second tip works for my case.

Below is my working code,

void tsk_reset(){

...

Event_post(event_tx, Event_Id_05);

...

}

void task1(){

...

Event_post(event_tx, Event_Id_00);

...

}

void task2(){

...

Event_post(event_tx, Event_Id_03);

...

}

void task3(){

...

events = Event_pend(event_tx, Event_Id_00 + Event_Id_03, Event_Id_05, BIOS_WAIT_FOREVER);

if((events & Event_Id_05) == Event_Id_05) {

if((events & Event_Id_00) == Event_Id_00)

Event_pend(event_tx, Event_Id_NONE, Event_Id_00, BIOS_NO_WAIT);

if((events & Event_Id_03) == Event_Id_03)

Event_pend(event_tx, Event_Id_NONE, Event_Id_03, BIOS_NO_WAIT);

continue;

}

...

}

B.R.

River Liu

Processors

Processors forum

How to reset an Event