I am sorry for asking such silly question,but i failed to search with key word 'gpiote'.
so here is my question,
what is the GPIOTE? what is the relationship with GPIO?
GPIO Tasks and Events (GPIOTE). It enables you to use the GPIOs in a task and event oriented way. Set it up so tasks trigger GPIO changes, or GPIO changes trigger events.
There's a large section on it in the reference manual which you can find in the SDK and Documentation link at the top of the page. Well actually it's not that large, it's about 2 pages.
GPIO Tasks and Events (GPIOTE). It enables you to use the GPIOs in a task and event oriented way. Set it up so tasks trigger GPIO changes, or GPIO changes trigger events.
There's a large section on it in the reference manual which you can find in the SDK and Documentation link at the top of the page. Well actually it's not that large, it's about 2 pages.