This test code shows how to configure GPIO and how to use it with interruption using GPIO as a component on a CPP project for esp-idf, it also has a SPI driver for WS2812 RGB led.

The example uses GPIO0 as input where normally we have a button attached to the port for BOOT porpuses, but in this example the button is going to be used for triggering a interruption and also control the configure outputs.

Before project configuration and build, be sure to set the correct chip target using idf.py set-target <chip_name>

Build the project and flash it to the board, then run the monitor tool to view the serial output:

Run idf.py -p PORT flash monitor to build, flash and monitor the project.

(To exit the serial monitor, type Ctrl-].)

• A development board with any Espressif SoC (e.g., ESP32-DevKitC, ESP-WROVER-KIT, etc.)
• A USB cable for Power supply and programming
• Some jumper wires to connect GPIOs.

The project esp-idf-gpio-component-example contains one source file in C++ language main.cpp. The file is located in folder main.

ESP-IDF projects are built using CMake. The project build configuration is contained in CMakeLists.txt files that provide set of directives and instructions describing the project's source files and targets (executable, library, or both).

Below is short explanation of remaining files in the project folder.

├── CMakeLists.txt
├── components
│   ├── cppgpio
│   │   ├── CMakeLists.txt
│   │   ├── idf_component.yml
│   │   ├── include
│   │   │   └── cppgpio.h
│   │   └── src
│   │       ├── cppgpio_input.cpp
│   │       └── cppgpio_output.cpp
│   └── espressif_led_strip_2.4.1
│       ├── CMakeLists.txt
│       ├── idf_component.yml
│       ├── README.md
│       ├── include
│       │   ├── led_strip.h
│       │   ├── led_strip_rmt.h
│       │   ├── led_strip_spi.h
│       │   └── led_strip_types.h
│       ├── include
│       │   └──  led_strip_interface.h
│       └── src
│           ├── led_strip_api.c
│           ├── led_strip_rmt_dev.c
│           ├── led_strip_rmt_encoder.c
│           ├── led_strip_rmt_encoder.h
│           └── led_strip_spi_dev.cpp
├── main
│   ├── CMakeLists.txt
│   ├── main.h
│   └── main.cpp
└── README.md                  This is the file you are currently reading