History

morris 5b516b107a timer_group: update hal api && fix intr_enable timer group interrupt enable is controled by level_int_ena instead of int_ena Closes https://github.com/espressif/esp-idf/issues/5103		2020-04-29 12:19:25 +08:00
..
main	timer_group: update hal api && fix intr_enable	2020-04-29 12:19:25 +08:00
CMakeLists.txt	ci: support to build esp32s2beta simple examples	2019-07-08 09:16:06 +08:00
Makefile	Moved examples to new folders / categories. Removed example numbers from example names	2017-01-16 23:08:35 +01:00
README.md	Timer API docs update, refactored example	2017-10-27 07:13:59 +02:00

README.md

Example: timer_group

This example uses the timer group driver to generate timer interrupts at two specified alarm intervals.

Functionality Overview

Two timers are configured
Each timer is set with some sample alarm interval
On reaching the interval value each timer will generate an alarm
One of the timers is configured to automatically reload it's counter value on the alarm
The other timer is configured to keep incrementing and is reloaded by the application each time the alarm happens
Alarms trigger subsequent interrupts, that is tracked with messages printed on the terminal:

    Example timer with auto reload
Group[0], timer[1] alarm event
------- EVENT TIME --------
Counter: 0x000000000000000a
Time   : 0.00000200 s
-------- TASK TIME --------
Counter: 0x00000000000107ff
Time   : 0.01351660 s

    Example timer without reload
Group[0], timer[0] alarm event
------- EVENT TIME --------
Counter: 0x00000000092ae316
Time   : 30.76111800 s
-------- TASK TIME --------
Counter: 0x00000000092bd535
Time   : 30.77351460 s