kopia lustrzana https://github.com/espressif/esp-idf
1.9 KiB
1.9 KiB
Example: General Purpose Timer
This example uses the timer group driver to generate timer interrupts at two specified alarm intervals.
How to Use Example
Hardware Required
- A development board with ESP SoC (e.g., ESP32-DevKitC, ESP-WROVER-KIT, etc.)
- A USB cable for Power supply and programming
Build and Flash
Run idf.py -p PORT flash monitor
to build, flash and monitor the project.
(To exit the serial monitor, type Ctrl-]
.)
See the Getting Started Guide for full steps to configure and use ESP-IDF to build projects.
Example Output
Timer Group with auto reload
Group[0], timer[0] alarm event
------- EVENT TIME --------
Counter: 0x0000000000000008
Time : 0.00000160 s
-------- TASK TIME --------
Counter: 0x0000000000004ed8
Time : 0.00403680 s
Timer Group without auto reload
Group[1], timer[0] alarm event
------- EVENT TIME --------
Counter: 0x00000000017d7848
Time : 5.00000160 s
-------- TASK TIME --------
Counter: 0x00000000017dcb32
Time : 5.00424680 s
Timer Group with auto reload
Group[0], timer[0] alarm event
------- EVENT TIME --------
Counter: 0x0000000000000008
Time : 0.00000160 s
-------- TASK TIME --------
Counter: 0x0000000000004dd4
Time : 0.00398480 s
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:
Troubleshooting
For any technical queries, please open an [issue] (https://github.com/espressif/esp-idf/issues) on GitHub. We will get back to you soon.