1. Ben Bass
  2. pylibftdi


pylibftdi / doc / introduction.rst

Ben Bass 0b31119 

Ben Bass 67e4b88 
Ben Bass 0b31119 


pylibftdi is a minimal Pythonic interface to FTDI devices using libftdi_.

.. _libftdi: http://www.intra2net.com/en/developer/libftdi/


 - Supports Python 2 and Python 3
 - Supports parallel and serial devices
 - Support for multiple devices
 - File-like interface wherever appropriate
 - Cross-platform


 - The API might change prior to reaching a 1.0 release.


The primary interface is the ``Device`` class in the pylibftdi package; this
gives serial access on relevant FTDI devices (e.g. the UM232R), providing a
file-like interface (read, write).  Baudrate is controlled with the ``baudrate``

If a Device instance is created with ``mode='t'`` (text mode) then read() and
write() can use the given ``encoding`` (defaulting to latin-1). This doesn't
make a lot of difference on Python 2 (and can be omitted), but allows easier
integration with passing unicode strings between devices in Python 3.

Multiple devices are supported by passing the desired device serial number (as
a string) in the ``device_id`` parameter - this is the first parameter in both
Device() and BitBangDevice() constructors. Alternatively the device 'description'
can be given, and an attempt will be made to match this if matching by serial
number fails.

History & Motivation
This package is the result of various bits of work using FTDI's
devices, primarily for controlling external devices.  Some of this
is documented on the codedstructure blog, codedstructure.blogspot.com

At least two other open-source Python FTDI wrappers exist, and each
of these may be best for some projects.

 * ftd2xx_ - ctypes binding to FTDI's own D2XX driver
 * pyftdi_ - a C extension libftdi binding

.. _ftd2xx: http://pypi.python.org/pypi/ftd2xx
.. _pyftdi: http://git.marcansoft.com/?p=pyftdi.git

pylibftdi exists in the gap between these two projects; ftd2xx uses
the (closed-source) D2XX driver, but provides a high-level Python
interface, while pyftdi works with libftdi but is very low-level.
The aim for pylibftdi is to work with the libftdi, but to provide
a high-level Pythonic interface.  Various wrappers and utility
functions are also part of the distribution; following Python's
batteries included approach, there are various interesting devices
supported out-of-the-box - or at least there will be soon!

 * Add more examples: SPI devices, knight-rider effects, input devices, MIDI...
 * Perhaps add support for D2XX driver, though the name then becomes a
   slight liability ;)


Copyright (c) 2010-2013 Ben Bass <benbass@codedstructure.net>

pylibftdi is released under the MIT licence; see the file "LICENSE.txt"
for information.

All trademarks referenced herein are property of their respective
libFTDI itself is developed by Intra2net AG.  No association with
Intra2net is claimed or implied, but I have found their library
helpful and had fun with it...