mirror of
https://github.com/espressif/esp-idf.git
synced 2024-10-05 20:47:46 -04:00
41890f15b9
- examples: add 'Capacitive touch sensor interrupts' example - Code review comments implemented - use only one image - add external picture of ESP32 Demo Board V2
31 lines
1.5 KiB
Markdown
31 lines
1.5 KiB
Markdown
# Touch Pad Interrupt Example
|
|
|
|
Demonstrates how to set up ESP32's capacitive touch pad peripheral to trigger interrupt when a pad is touched.
|
|
|
|
Application has been developed and tested using [ESP32 Demo Board V2](https://dl.espressif.com/dl/schematics/ESP32-Demo-Board-V2_sch.pdf) that has ten capacitive sensor pads T0 to T9 exposed.
|
|
|
|
|
|
|
|
The following output is shown when a pad is touched:
|
|
|
|
```
|
|
I (6303) Touch pad: Waiting for any pad being touched...
|
|
I (6733) Touch pad: T6 activated!
|
|
I (7333) Touch pad: T5 activated!
|
|
I (7723) Touch pad: T3 activated!
|
|
I (8043) Touch pad: T2 activated!
|
|
I (8883) Touch pad: T4 activated!
|
|
I (9523) Touch pad: T7 activated!
|
|
I (12503) Touch pad: Waiting for any pad being touched...
|
|
I (15483) Touch pad: T6 activated!
|
|
I (16253) Touch pad: T5 activated!
|
|
I (17903) Touch pad: Waiting for any pad being touched...
|
|
I (22903) Touch pad: Waiting for any pad being touched...
|
|
```
|
|
|
|
Note: Sensing threshold is set up automatically at start up by performing simple calibration. Application is reading current value for each pad and assuming half of this value as the sensing threshold. Do not touch pads on application start up, otherwise sensing may not work correctly.
|
|
|
|
For a simpler example how to configure and read capacitive touch pads, please refer to [touch_pad_read](../touch_pad_read).
|
|
|
|
See the README.md file in the upper level 'examples' directory for more information about examples.
|