I/O library overview

Table of Contents

• Introduction
• Key Features
• Architecture
• Best Practices

Introduction

The D7 SDK I/O library provides an interface for interacting with various hardware I/O systems available on the Veethree D7 platform, including digital I/O, analog sensors, PWM input/output, and 4-20 mA interfaces.

Key Features

• Digital input and output with support for various modes
• PWM signal generation (output) and measurement (input)
• Analog sensor reading with multiple sensor types (voltage, resistance, temperature)
• 4-20 mA current loop interfaces
• Event-based notification system for asynchronous I/O

Architecture

The I/O Library is organized into several key components:

• Digital Input/Output - Interface for binary digital signals
• PWM Input/Output - Interface for PWM signal generation and measurement
• Analog - Interface for analog sensor reading
• 4-20 mA - Interface for 4-20 mA current loop interfaces
• Events - System for asynchronous I/O event handling

Best Practices

• Always call init() before using interfaces that require it
• Release resources when they're no longer needed with release()
• Use the profile_builder to create valid analog sensor profiles
• Check for errors when performing I/O operations
• Configure appropriate event handlers for asynchronous operations

See the I/O library examples page for complete code examples.