USB PD Sink library for embedded devices.

This library focuses on the most common needs of PD‑powered projects and on ease of use.

Features:

• SPR modes (Fixed and PPS).
• EPR modes (28 V and up).
• No platform dependencies in the core.

Not supported:

• Source role (SRC).
• DRP / DFP / FRS / Alt Modes.

See the docs and examples.

For a real-world complex scenario, see the heater-related classes in the Reflow Micro Table project.

This package uses ETL but leaves the version unpinned to avoid conflicts with your application. Pin ETL in your project to keep the configuration stable.

This project can help when:

• you need dynamic power control at runtime (heaters, for example).
• you want to use an MCU with an embedded UCPD and simplify external components.
• you need “non-standard” voltages or current limits (via PPS/AVS profiles).

If you only need a single fixed profile, a simple PD trigger (e.g., CH224 or an external one) can be a more rational choice.

Other projects with USB PD support:

• Google Embedded Controller
• Zephyr Project
• USB Power Delivery for Arduino
• usb-pd

Documentation:

• USB Power Delivery