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: 22 days ago
JSON representation
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 (about 8 years ago)
- Default Branch: master
- Last Pushed: 2018-05-10T13:51:58.000Z (almost 7 years ago)
- Last Synced: 2024-10-30T14:43:11.854Z (6 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
Awesome Lists containing this project
- 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/