https://github.com/lsartory/pdm

Pulse Density Modulator
https://github.com/lsartory/pdm

embedded no-std pdm rust

Last synced: 4 months ago
JSON representation

Pulse Density Modulator

• Host: GitHub
• URL: https://github.com/lsartory/pdm
• Owner: lsartory
• License: mit
• Created: 2025-04-13T15:21:33.000Z (about 1 year ago)
• Default Branch: main
• Last Pushed: 2025-04-15T18:45:47.000Z (about 1 year ago)
• Last Synced: 2025-10-05T14:26:32.435Z (8 months ago)
• Topics: embedded, no-std, pdm, rust
• Language: Rust
• Homepage: https://crates.io/crates/pdm
• Size: 5.86 KB
• Stars: 0
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

Awesome Lists containing this project

README

          
# PDM

PDM (Pulse Density Modulator) is a library meant for digital-to-analog conversion in embedded systems, using a simple second-order delta sigma modulator.

If no hardware PWM channels are available, this is a lightweight alternative.

This can be used, for example, to modulate the intensity of an LED.

## Features

The library offers the following features:

* Easy to use

* Suitable for `no_std` environments

* No external dependencies

* Ultra-low RAM requirements

* Supports the following types: u8, u16, u32, u64, i8, i16, i32, i64, f32, f64

## Limitations

For good results, the output frequency must be high and stable in relation to the modulated signal frequency.

An external low-pass filter may be necessary to remove noise, depending on the application.

## Example

```rust no_run

let mut pdm = pdm::Pdm::::new();

pdm.set_value(42);

loop {

    if pdm.update() {

        // Set output high

    } else {

        // Set output low

    }

    // Sleep until next iteration

}

```

## Changelog

| Date       | Version | Changes                |

|------------|---------|------------------------|

| 2025-04-15 | 1.0.0   | Cleaner code structure |

| 2025-04-13 | 0.1.0   | Initial release        |