https://github.com/Nilhcem/ledcontrol-androidthings

Android Things Port of the Arduino LedControl library for the MAX7219 LED matrix module
https://github.com/Nilhcem/ledcontrol-androidthings

Last synced: 14 days ago
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Android Things Port of the Arduino LedControl library for the MAX7219 LED matrix module

• Host: GitHub
• URL: https://github.com/Nilhcem/ledcontrol-androidthings
• Owner: Nilhcem
• License: apache-2.0
• Created: 2017-03-25T22:50:36.000Z (over 7 years ago)
• Default Branch: master
• Last Pushed: 2018-05-10T13:51:58.000Z (about 6 years ago)
• Last Synced: 2024-04-14T15:15:37.249Z (2 months ago)
• Language: Java
• Size: 1.67 MB
• Stars: 19
• Watchers: 1
• Forks: 2
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • Changelog: CHANGELOG.md
  • License: LICENSE

Lists

• awesome-android-things - ledcontrol - MAX72xx LED Matrix (Useful links / Drivers)
• awesome-android-things - ledcontrol - MAX72xx LED Matrix (Useful links / Drivers)

README

        
# MAX7219 / MAX7221 driver for Android Things

A port of the LedControl Arduino library for Android Things.

![photo][]

## Download

```groovy

dependencies {

    compile 'com.nilhcem.androidthings:driver-max72xx:0.0.3'

}

```

## Usage

### Setup

```java

try {

    ledControl = new LedControl("SPI0.0", 1); // second parameter is the number of chained matrices. Here, we only use 1 LED matrix module (8x8).

    for (int i = 0; i < ledControl.getDeviceCount(); i++) {

        ledControl.setIntensity(i, 3);

        ledControl.shutdown(i, false);

        ledControl.clearDisplay(i);

    }

} catch (IOException e) {

    Log.e(TAG, "Error initializing LED matrix", e);

}

// Don't forget to call ledControl.close() when you are done.

```

### Turn on one pixel on matrix #0 at {row:2, col:3}

```java

ledControl.setLed(0, 2, 3, true);

```

### Show a bitmap on matrix #0

```java

Bitmap bmp = BitmapFactory.decodeResource(getResources(), R.drawable.smiley);

ledControl.draw(0, bmp);

```

### Draw a single bitmap on multiple devices

```java

// Here, we're drawing a [width=32, height=8] bitmap on a "4 in 1" display module

Bitmap bmp = BitmapFactory.decodeResource(getResources(), R.drawable.hearts32x8);

ledControl.draw(bmp);

```

### Show "42.ABCDEF" on a MAX7219 8-digit module

```java

ledControl.setDigit(0, 7, (byte) 0x04, false);

ledControl.setDigit(0, 6, (byte) 0x02, true);

ledControl.setDigit(0, 5, (byte) 0x0A, false);

ledControl.setDigit(0, 4, (byte) 0x0B, false);

ledControl.setDigit(0, 3, (byte) 0x0C, false);

ledControl.setDigit(0, 2, (byte) 0x0D, false);

ledControl.setDigit(0, 1, (byte) 0x0E, false);

ledControl.setDigit(0, 0, (byte) 0x0F, false);

```

### Show "123456" on a MAX7219 8-digit module

```java

int curValue = 123456;

for (int i = 0; i < 8; i++) {

    byte value = (byte) ((i != 0 && curValue == 0) ? 16 : (curValue % 10));

    ledControl.setDigit(0, i, value, false);

    curValue /= 10;

}

```

## Schematic

![schematic][]

Credits to [https://learn.adafruit.com/trinket-slash-gemma-space-invader-pendant/animation][invaders] for the Space invaders animation, [http://wdi.supelec.fr/boulanger/MicroPython/][fritzing] for the fritzing part.

[photo]: https://raw.githubusercontent.com/Nilhcem/ledcontrol-androidthings/master/assets/preview.gif

[schematic]: https://raw.githubusercontent.com/Nilhcem/ledcontrol-androidthings/master/assets/schematic.png

[invaders]: https://learn.adafruit.com/trinket-slash-gemma-space-invader-pendant/animation

[fritzing]: http://wdi.supelec.fr/boulanger/MicroPython/