Supported Targets	ESP32	ESP32-C2	ESP32-C3	ESP32-C6	ESP32-H2	ESP32-S2	ESP32-S3

Example: esp-idf-gpio-component-example

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.

GPIO functions:

GPIO	Direction	Configuration
output_1	output
output_2	output
output_3	output
LED_STRIP_BLINK_GPIO	output	SPI driver for WS2812
input_1	input	pulled up, interrupt from rising edge

Test:

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.

How to use example

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

Build and Flash

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-].)

Hardware Required

• 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.

Example folder contents

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