MicroPython driver for AdaFruit 8x8 LED Matrix display.
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matrix8x8.py

README.md

MicroPython Matrix8x8 Driver

MicroPython driver for AdaFruit 8x8 LED Matrix display with HT16K33 backpack.

Installation

Copy matrix8x8.py file to your pyboard.

Usage

from matrix8x8 import Matrix8x8
display = Matrix8x8()
display.set_row(2, 0xFF)      # turn on all LEDs in row 2
display.set_column(3, 0xFF)   # turn on all LEDs in column 3
display.set_pixel(7, 6)             # turn on LED at row 7, column 6
...

Device controll methods:

__init__(i2c_bus=1, addr=0x70, brightness=15, i2c=None)
    Params:
    * i2c_bus = I2C bus ID (1 or 2) or None (if param 'i2c' is provided)
    * addr = I2C address of connected display
    * brightness = display brightness (0 - 15)
    * i2c = initialised instance of pyb.I2C object

on()
    Turn on display.

off()
    Turn off display. You can controll display when it's off (change image,
    brightness, blinking, ...).

set_brightness(value)
    Set display brightness. Value from 0 (min) to 15 (max).

set_blinking(mode)
    Set blinking. Modes:
        0 - blinking off
        1 - blinking at 2Hz
        2 - blinking at 1Hz
        3 - blinking at 0.5Hz

Image maipulation methods:

set(bitmap)
    Show bitmap on display. Bitmap should be 8 bytes/bytearray object or any
    iterable object containing 8 bytes (one byte per row).

set_row(row, byte)
    Set row by byte.

set_column(column, byte)
    Set column by byte.

set_pixel(row, column)
    Set (turn on) pixel.

clear()
    Clear display.

clear_row(row)
    Clear row.

clear_column(column)
    Clear column.

clear_pixel(row, column)
    Clear pixel.

Notes:

  • Rows a columns are numbered from 0 to 7.

Examples

examples/test_features.py - Simple demo of display/driver fetures and usage. examples/game_of_life.py - Conway's Game of Life. In action video: http://youtu.be/XZgU1wqZMic

You can copy one of the examples to your pyboard as main.py and if you connect display to I2C bus 1, they will instantly work.

Wiring

LED Matrix display is using I2C bus. You can connect and controll more displays with one I2C bus if you change I2C address of display.

Example of wiring to I2C bus 1 on breadboard:

More info & Help

You can check more about the MicroPython project here: http://micropython.org

Discussion about this driver: http://forum.micropython.org/viewtopic.php?f=5&t=405