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A library for controling a set of 8x8 LEDs with a MAX7219 or
MAX7221 displays.
This is a plugin for Adafruit's core graphics library, providing
basic graphics primitives (points, lines, circles, etc.).
You need to download and install Adafruit_GFX to use this library.
Adafruit invests time and resources providing this open
source code, please support Adafruit and open-source hardware
by purchasing products from Adafruit!
Written by Mark Ruys, 2013.
BSD license, check license.txt for more information.
All text above must be included in any redistribution.
#ifndef Max72xxPanel_h
#define Max72xxPanel_h
#if (ARDUINO >= 100)
#include <Arduino.h>
#include <WProgram.h>
#include "pins_arduino.h"
class Max72xxPanel : public Adafruit_GFX {
* Create a new controler
* Parameters:
* csPin pin for selecting the device
* hDisplays number of displays horizontally
* vDisplays number of displays vertically
Max72xxPanel(byte csPin, byte hDisplays=1, byte vDisplays=1);
* Define how the displays are ordered. The first display (0)
* is the one closest to the Arduino.
void setPosition(byte display, byte x, byte y);
* Define if and how the displays are rotated. The first display
* (0) is the one closest to the Arduino. rotation can be:
* 0: no rotation
* 1: 90 degrees clockwise
* 2: 180 degrees
* 3: 90 degrees counter clockwise
void setRotation(byte display, byte rotation);
* Implementation of Adafruit's setRotation(). Probably, you don't
* need this function as you can achieve the same result by using
* the previous two functions.
void setRotation(byte rotation);
* Draw a pixel on your canvas. Note that for performance reasons,
* the pixels are not actually send to the displays. Only the internal
* bitmap buffer is modified.
void drawPixel(int16_t x, int16_t y, uint16_t color);
* As we can do this much faster then setting all the pixels one by
* one, we have a dedicated function to clear the screen.
* The color can be 0 (blank) or non-zero (pixel on).
void fillScreen(uint16_t color);
* Set the shutdown (power saving) mode for the device
* Paramaters:
* status If true the device goes into power-down mode. Set to false
* for normal operation.
void shutdown(boolean status);
* Set the brightness of the display.
* Paramaters:
* intensity the brightness of the display. (0..15)
void setIntensity(byte intensity);
* After you're done filling the bitmap buffer with your picture,
* send it to the display(s).
void write();
byte SPI_CS; /* SPI chip selection */
/* Send out a single command to the device */
void spiTransfer(byte opcode, byte data=0);
/* We keep track of the led-status for 8 devices in this array */
byte *bitmap;
byte bitmapSize;
byte hDisplays;
byte *matrixPosition;
byte *matrixRotation;
#endif // Max72xxPanel_h
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