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A library to drive a MAX7219 LED serializer using hardware spidev

Project description

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Python library interfacing LED matrix displays with the MAX7219 driver using SPI on the Raspberry Pi and other linux-based single board computers - it provides a Pillow-compatible drawing canvas, and other functionality to support:

  • multiple cascaded devices

  • LED matrix and seven-segment variants

  • scrolling/panning capability,

  • terminal-style printing,

  • state management,

  • dithering to monochrome,

  • Python 2.7 and 3.4+ are both supported

max7219 matrix

A LED matrix can be acquired for a few pounds from outlets like Banggood. Likewise 7-segment displays are available from Ali-Express or Ebay.

Breaking changes

Version 0.3.0 was released on 19 January 2017: this came with a rename of the github project from max7219 to luma.led_matrix to reflect the changing nature of the codebase.

There is no direct migration path, but the old docs and PyPi packages will remain available indefinitely, but that deprecated codebase will no longer recieve updates or fixes.

The consequence is that any existing code that uses the old max7219 package should probably be updated.

Documentation

Full documentation with installation instructions and examples can be found on https://luma-led-matrix.readthedocs.io.

License

The MIT License (MIT)

Copyright (c) 2017 Richard Hull & Contributors

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the “Software”), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

Contributing

Pull requests (code changes / documentation / typos / feature requests / setup) are gladly accepted. If you are intending some large-scale changes, please get in touch first to make sure we’re on the same page: try and include a docstring for any new methods, and try and keep method bodies small, readable and PEP8-compliant.

GitHub

The source code is available to clone at: http://github.com/rm-hull/lum.led_matrix.git

Contributors

  • Thijs Triemstra (@thijstriemstra)

  • Jon Carlos (@webmonger)

  • Unattributed (@wkapga)

  • Taras (@tarasius)

  • Brice Parent (@agripo)

  • @twdkeule

ChangeLog

Version

Description

Date

Upcoming

TBC

0.3.2

  • Replace bytearray with mutable_string implementation

  • More tests

2017/01/20

0.3.1

  • Python 3 compatibility (fix exception in bytearray creation)

  • Begin to add tests & test infrastructure

2017/01/20

0.3.0

  • Package rename to luma.led_matrix (Note: Breaking changes)

2017/01/19

0.2.3

  • Bit-bang version using wiringPi

2013/01/28

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