dln2-gpio-wrapper 0.1.0

A Python library for DLN2 GPIO adapters. Originally developed for Pico USB IO Board.

DLN2 GPIO Wrapper

A Python library for interfacing with DLN2 USB-to-GPIO adapters. It targets the Pico USB I/O Board firmware and packages the host-side GPIO access layer as a standalone Python project.

Features

• Low-level DLN2 USB GPIO client built on pyusb
• High-level GPIO helper for pin enable, direction, read, write, and event config
• GPIO event polling with async packet handling
• Command-line helpers for GPIO info, watch, and toggle
• Pure Python, no compiled extension

Installation

From source:

git clone https://github.com/syabyr/dln2_gpio_wrapper.git
cd dln2_gpio_wrapper
pip install .

For development:

pip install -e ".[dev]"

Quick Start

from dln2_gpio_wrapper import GPIO

with GPIO() as gpio:
    pin = 25
    gpio.enable(pin, output=True)
    gpio.write(pin, 1)
    print(gpio.read(pin))
    gpio.toggle(pin)

Firmware Notes

• PIN_GET_VAL returns the current live pin level.
• Edge events are latched only in a small firmware queue and delivered asynchronously.
• Debounce is not implemented by this firmware.
• Event queue depth in firmware is limited, so bursts can overflow.

Command-Line Tools

dln2-gpio-info --help
dln2-gpio-watch --help
dln2-gpio-toggle --help

Development

make test
make build