USB-C Power Delivery with FUSB302B

A comprehensive library of functions to facilitate USB-C power negotiation using the Serial protocol & the specified packet parameters outlined in the MicroChip Datasheet

Features

• Complete PD Protocol Implementation: Full USB-PD 2.0 and 3.0 specification support
• Power Negotiation: Automatic voltage and current negotiation with connected devices
• Device Recognition: Automatic detection of device types (charger, monitor, tablet, laptop)
• Vendor Defined Messages: Support for VDM discovery identity and SVID requests
• Extended Source Capabilities: PD 3.0 extended message support
• Multi-Voltage Support: Handles 5V, 9V, 12V, 15V, 20V power profiles
• Real-time Monitoring: Interrupt-driven attach/detach detection

Hardware Requirements

• FUSB302B USB-C Power Delivery controller
• Arduino-compatible microcontroller (tested with Pi Pico)
• USB-C connector with CC1/CC2 pins connected to FUSB302B
• I2C communication interface

Protocol Support

• USB Power Delivery 2.0 and 3.0 specifications
• Source Capabilities discovery and negotiation
• Sink Capabilities advertisement
• Power role swap and data role swap
• Cable identity discovery
• Extended source capabilities (PD 3.0)

Files

• PD_Negotiation.cpp: Complete power delivery negotiation implementation with device recognition
• Protocol_Engine.cpp: Core protocol engine for basic packet handling and communication

Device Recognition

The library includes a device database that automatically identifies connected devices based on their VID/PID:

• Chargers (Xiaomi, etc.)
• Tablets (iPad, Samsung, OnePlus)
• Laptops (Dell XPS)
• Monitors and other USB-C devices

Technicals

Built on the MicroChip FUSB302B datasheet specifications with serial protocol communication over I2C. Implements the complete USB-PD state machine including:

• CC line orientation detection
• Power contract establishment
• Message retry and timeout handling
• CRC validation and Good CRC responses
• Interrupt-driven event processing