Gravity: CH423 I2C 24 Digital IO Expansion Module

1. Arduino API Functions

The article explores the main API functions available in Arduino for managing GPIO and GPO pins, including setting pin modes, output levels, reading pin states, and configuring interrupts. It provides detailed descriptions of typedef enums used for pin groups, modes, and interrupt settings, aiming to enhance users' understanding and application of these functions in Arduino projects.

2. Sample Code for Raspberry Pi

This article provides step-by-step instructions on using the Raspberry Pi with the CH423 I2C 24 Digital IO Expansion Module, covering hardware and software setup, wiring diagrams, and detailed guidance on running various sample codes to demonstrate different functionalities.

3. Sample Code for Arduino

This article provides a comprehensive guide to Arduino sample codes, including detailed hardware and software preparation steps, wiring diagrams, and practical examples such as blink.ino and ioInterrupt.ino. It elaborates on how to configure GPIO and GPO pins to implement LED control, write interrupt handling routines, and complete pin mode configuration with the help of the CH423 library.