esp-idf/examples/peripherals/timer_group/README.md

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# 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
```