esp-idf/components/esp_hal_ledc

ESP Hardware Abstraction Layer for LEDC Peripheral

Note

This component is currently in beta. Its API, behavior, and compatibility may change at any time and without notice; backward compatibility is not guaranteed. Use caution when integrating into production systems.

Overview

The esp_hal_ledc component provides a Hardware Abstraction Layer for the LEDC (LED PWM Controller) peripheral across all ESP-IDF supported targets.

Architecture

The LEDC HAL is structured in two main sub-layers:

1. HAL Layer (Upper): Defines the operational steps and data structures required to control LEDC (e.g., timer/channel configuration, duty updates, fade and low-power helpers).
2. Low-Level Layer (Bottom): Serves as a translation layer between the HAL and the register files defined in the soc component, handling target-specific register configurations.

Features

• Multi-timer and multi-channel PWM generation
• High-speed and low-speed modes (on supported chips)
• Duty cycle setting and smooth fading
• Timer resolution and frequency configuration
• Interrupt-driven operations
• Low-power helpers (on supported chips)

Usage

The HAL functions primarily serve ESP-IDF peripheral drivers such as esp_driver_ledc.

Advanced developers can use these interfaces directly when implementing custom drivers, with the understanding that API stability is not guaranteed.

Dependencies

• soc: Provides chip-specific register definitions
• hal: Core hardware abstraction utilities and macros