https://github.com/stianeikeland/max7219-clj

:space_invader: max7219 library for clojure (raspberry pi)
https://github.com/stianeikeland/max7219-clj

Last synced: 3 months ago
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:space_invader: max7219 library for clojure (raspberry pi)

• Host: GitHub
• URL: https://github.com/stianeikeland/max7219-clj
• Owner: stianeikeland
• License: epl-1.0
• Created: 2014-04-15T15:36:12.000Z (almost 11 years ago)
• Default Branch: master
• Last Pushed: 2014-11-15T11:43:58.000Z (about 10 years ago)
• Last Synced: 2024-06-12T18:43:19.773Z (7 months ago)
• Language: Clojure
• Homepage:
• Size: 188 KB
• Stars: 3
• Watchers: 4
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# max7219

Clojure library for max7219 led matrix driver (on raspberry pi).

[![Max7219 space invader](http://blagg.tadkom.net/images/max7219/anim.gif)](https://vimeo.com/92539944)

```` clojure

[max7219 "0.1.2"]

````

The max7219 is serial interfaced 8x8 (or 7 segment) LED driver.

Several drivers can be chained in series. You use the driver by

sending it a command and data (1 byte + 1 byte) over SPI. Each driver

hold 2 bytes, and will shift out the old values to the next

device in the chain. The driver will execute the command it holds when

slave select is set high at the end of transmission.

The 8x8 matrix display is arranged by 8 columns, each column is

represented by 1 byte (8 bit). This means you can update 1 column on

every display for every round of transmition.

By transmitting `[1 255 1 255]` you turn all leds in

the first column on for two displays. `[1 255 2 0]` turns all leds on

in the first column on the second display, and turns all leds off on

the second column for the first display (commands are shifted to the next

display if a new byte pair is received).

Datasheet: [MAX7219-MAX7221.pdf](http://pdfserv.maximintegrated.com/en/ds/MAX7219-MAX7221.pdf)

More information with examples available in this [blog post](http://blagg.tadkom.net/2014/04/21/max7219-rpi-clojure/).

## Usage

FIXME

## License

Copyright © 2014 FIXME

Distributed under the Eclipse Public License either version 1.0 or (at

your option) any later version.