lcd2usb 1.2

Contents

• Introduce
• Usage
• Requirements
• Installation

LCD2USB’s Python Library

home: http://github.com/xyb/lcd2usb

PyPI: http://pypi.python.org/pypi/lcd2usb

Introduce

The LCD2USB’s Python Library is a Pure-python wrapper for LCD2USB which provide a simple way to control your LCD2USB display device. LCD2USB is a open source/open hardware project to connect HD44780 based text LCD displays to various PCs via USB.

Usage

Connect a lcd2usb device is easy:

>>> from lcd2usb import LCD
>>> lcd = LCD()
>>> lcd.info()
Found LCD2USB device on bus 004 device 004.

Get lcd2usb firmware version:

>>> lcd.version
(1, 9)

Write something on the screen:

>>> lcd.write('Hello, LCD2USB!')

Clean screen and wirte some on the 2nd row:

>>> lcd.clear()
>>> lcd.goto(0, 1)
>>> lcd.write('Flying with PYTHON')

Or simpler:

>>> lcd.write('Flying with PYTHON', 0, 1)

Define a custom smile symbol and display it on the center of first row (on a 4x20 display):

>>> from lcd2usb import SMILE_SYMBOL
>>> lcd.define_char(0, SMILE_SYMBOL)
>>> lcd.write('\0', 9, 0)

That it!

If you need a quickly running test for your device, use this:

python -m lcd2usb

Requirements

• Python 2.5+ required
• ctypes (included in Python 2.5+)
• libusb-1.0
• python-libusb1

Installation

Installation is done just as for any other Python library. Using the pip or easy_install command from setuptools is the easiest:

pip install lcd2usb

Or:

easy_install install lcd2usb