A platform-agnostic Hardware Abstraction Layer (HAL) for Real-Time Clock (RTC) devices in embedded Rust systems. This crate provides traits and utilities for implementing RTC drivers following the embedded-hal design patterns.

This crate is organized into several modules:

• datetime - Core DateTime struct with validation and utility functions
• rtc - Main Rtc trait defining the RTC interface
• nvram - RtcNvram trait for RTCs with non-volatile memory
• error - Error handling framework and RtcError trait
• bcd - Binary Coded Decimal conversion utilities

This project is licensed under the MIT License.