demux-rs

A Rust library (no_std) providing a generic Demultiplexer trait, plus an implementation for the 74HC138 demultiplexer.

Overview

• Demultiplexer trait: a generic interface for splitting a device into multiple output pins
• 74HC138 driver: a high-level Rust API for controlling the 74HC138 chip via embedded-hal
• No-std compatible: works on embedded systems without an operating system

When you split a 74HC138, you get 8 output pins (Y0..Y7), each conforming to embedded-hal’s OutputPin trait. You can then activate or deactivate each output individually.

Example Usage:

use demux_rs::hc138::HC138;
use embedded_hal::digital::OutputPin;

// Suppose you have four microcontroller pins implementing `OutputPin`:
let pin_a0 = /* ... */;
let pin_a1 = /* ... */;
let pin_a2 = /* ... */;
let pin_g1 = /* ... */;

// Create the 74HC138 driver
let mut demux = HC138::new(pin_a0, pin_a1, pin_a2, pin_g1);

// Split into 8 outputs (Y0..Y7)
let mut parts = demux.split();

// Each output (e.g. y0) is an `OutputPin`:
parts.y0.set_low().unwrap();  // Activates Y0 (low)
parts.y0.set_high().unwrap(); // Deactivates Y0 (high)
parts.y1.set_low().unwrap();  // Activates Y1, etc.

Licensed under either of

MIT License
Apache License, Version 2.0

at your option.