Adafruit_GFX subclass + fixed 'ghosting' issue

Author: PaintYourDragon

RGBmatrixPanel.cpp

@@ -4,8 +4,9 @@
  #include "WProgram.h"
  #include "pins_arduino.h"
 #endif
+#include "Adafruit_GFX.h"
 
-class RGBmatrixPanel : public Print {
+class RGBmatrixPanel : public Adafruit_GFX {
 
  public:
 
@@ -19,19 +20,12 @@ class RGBmatrixPanel : public Print {
 
   void
     begin(void),
-    drawPixel(int x, int y, uint16_t c),
-    drawLine(int x0, int y0, int x1, int y1, uint16_t c),
-    drawRect(int x, int y, uint8_t w, uint8_t h, uint16_t c),
-    fillRect(int x, int y, uint8_t w, uint8_t h, uint16_t c),
-    drawCircle(int x0, int y0, uint8_t r, uint16_t c),
-    fillCircle(int x0, int y0, uint8_t r, uint16_t c),
-    fill(uint16_t c),
+    drawPixel(int16_t x, int16_t y, uint16_t c),
+    fillScreen(uint16_t c),
     updateDisplay(void),
     swapBuffers(boolean),
     dumpMatrix(void);
   uint8_t
-    width(void),
-    height(void),
     *backBuffer(void);
   uint16_t
     Color333(uint8_t r, uint8_t g, uint8_t b),
@@ -41,25 +35,11 @@ class RGBmatrixPanel : public Print {
     ColorHSV(long hue, uint8_t sat, uint8_t val, boolean gflag);
 
   // Printing
-  void
-    attachInterrupt(void (*func)(void)),
-    setCursor(int x, int y),
-    setTextSize(uint8_t s),
-    setTextColor(uint16_t c),
-    drawChar(int x, int y, char c, uint16_t color, uint8_t size);
-#if ARDUINO >= 100
-  size_t write(uint8_t c);
-#else
-  void   write(uint8_t c);
-#endif
-
  private:
 
-  uint8_t  *matrixbuff[2];
-  uint8_t  nRows, nPlanes, textsize, backindex;
-  int      cursor_x, cursor_y;
-  uint16_t textcolor;
-  boolean  swapflag;
+  uint8_t *matrixbuff[2];
+  uint8_t nRows, nPlanes, backindex;
+  boolean swapflag;
 
   // Init/alloc code common to both constructors:
   void init(uint8_t rows, uint8_t a, uint8_t b, uint8_t c,

RGBmatrixPanel.h

@@ -1,7 +1,8 @@
 // colorwheel demo for RGBmatrixPanel library.
 // Renders a nice circle of hues on a 32x32 RGB LED matrix.
 
-#include "RGBmatrixPanel.h"
+#include <Adafruit_GFX.h>   // Core graphics library
+#include <RGBmatrixPanel.h> // Hardware-specific library
 
 #define A   A3
 #define B   A2

examples/colorwheel_32x32/colorwheel_32x32.pde

@@ -3,7 +3,8 @@
 // Uses precomputed image data stored in PROGMEM rather than
 // calculating each pixel.  Nearly instantaneous!  Woo!
 
-#include "RGBmatrixPanel.h"
+#include <Adafruit_GFX.h>   // Core graphics library
+#include <RGBmatrixPanel.h> // Hardware-specific library
 #include "image.h"
 
 #define A   A3

examples/colorwheel_progmem_32x32/colorwheel_progmem_32x32.pde

@@ -1,15 +1,16 @@
 // plasma demo for RGBmatrixPanel library.
 // Demonstrates double-buffered animation on 16x32 RGB LED matrix.
 
-#include "RGBmatrixPanel.h"
-#include <avr/pgmspace.h> 
+#include <avr/pgmspace.h>
+#include <Adafruit_GFX.h>   // Core graphics library
+#include <RGBmatrixPanel.h> // Hardware-specific library
 
-#define A   A0
-#define B   A1
-#define C   A2
 #define CLK 8  // MUST be on PORTB!
 #define LAT A3
 #define OE  9
+#define A   A0
+#define B   A1
+#define C   A2
 // Last parameter = 'true' enables double-buffering, for flicker-free,
 // buttery smooth animation.  Note that NOTHING WILL SHOW ON THE DISPLAY
 // until the first call to swapBuffers().  This is normal.
@@ -54,10 +55,10 @@ void setup() {
   matrix.begin();
 }
 
-const float radius1  = 16.3, radius2  = 23.0, radius3  = 40.8, radius4  = 44.2,
-            centerx1 = 16.1, centerx2 = 11.6, centerx3 = 23.4, centerx4 =  4.1, 
-            centery1 =  8.7, centery2 =  6.5, centery3 = 14.0, centery4 = -2.9;
-float       angle1   =  0.0, angle2   =  0.0, angle3   =  0.0, angle4   =  0.0;
+const float radius1  = 65.2, radius2  = 92.0, radius3  = 163.2, radius4  = 176.8,
+            centerx1 = 64.4, centerx2 = 46.4, centerx3 =  93.6, centerx4 =  16.4, 
+            centery1 = 34.8, centery2 = 26.0, centery3 =  56.0, centery4 = -11.6;
+float       angle1   =  0.0, angle2   =  0.0, angle3   =   0.0, angle4   =   0.0;
 long        hueShift =  0;
 
 void loop() {
@@ -78,10 +79,10 @@ void loop() {
     x1 = sx1; x2 = sx2; x3 = sx3; x4 = sx4;
     for(x=0; x<matrix.width(); x++) {
       value = hueShift
-        + (int8_t)pgm_read_byte(sinetab + (uint8_t)((x1 * x1 + y1 * y1) >> 2))
-        + (int8_t)pgm_read_byte(sinetab + (uint8_t)((x2 * x2 + y2 * y2) >> 2))
-        + (int8_t)pgm_read_byte(sinetab + (uint8_t)((x3 * x3 + y3 * y3) >> 3))
-        + (int8_t)pgm_read_byte(sinetab + (uint8_t)((x4 * x4 + y4 * y4) >> 3));
+        + (int8_t)pgm_read_byte(sinetab + (uint8_t)((x1 * x1 + y1 * y1) >> 4))
+        + (int8_t)pgm_read_byte(sinetab + (uint8_t)((x2 * x2 + y2 * y2) >> 4))
+        + (int8_t)pgm_read_byte(sinetab + (uint8_t)((x3 * x3 + y3 * y3) >> 5))
+        + (int8_t)pgm_read_byte(sinetab + (uint8_t)((x4 * x4 + y4 * y4) >> 5));
       matrix.drawPixel(x, y, matrix.ColorHSV(value * 3, 255, 255, true));
       x1--; x2--; x3--; x4--;
     }

examples/plasma_16x32/plasma_16x32.pde

@@ -1,7 +1,8 @@
 // plasma demo for RGBmatrixPanel library.
 // Demonstrates unbuffered animation on 32x32 RGB LED matrix.
 
-#include "RGBmatrixPanel.h"
+#include <Adafruit_GFX.h>   // Core graphics library
+#include <RGBmatrixPanel.h> // Hardware-specific library
 #include <avr/pgmspace.h> 
 
 #define A   A3

examples/plasma_32x32/plasma_32x32.pde

@@ -1,48 +1,51 @@
 // scrolltext demo for RGBmatrixPanel library.
 // Demonstrates double-buffered animation on 16x32 RGB LED matrix.
 
-#include "RGBmatrixPanel.h"
+#include <Adafruit_GFX.h>   // Core graphics library
+#include <RGBmatrixPanel.h> // Hardware-specific library
 
-#define A   A0
-#define B   A1
-#define C   A2
 #define CLK 8  // MUST be on PORTB!
 #define LAT A3
 #define OE  9
+#define A   A0
+#define B   A1
+#define C   A2
 // Last parameter = 'true' enables double-buffering, for flicker-free,
 // buttery smooth animation.  Note that NOTHING WILL SHOW ON THE DISPLAY
 // until the first call to swapBuffers().  This is normal.
 RGBmatrixPanel matrix(A, B, C, CLK, LAT, OE, true);
 
-char     str[]   = "Adafruit 16x32 RGB LED Matrix";
-int      textX   = matrix.width(),
-         textMin = sizeof(str) * -12;
-long     hue     = 0;
-int      ball[3][4] = {
-   3,  0,  1,  1, // Initial X,Y pos & velocity for 3 bouncy balls
-  17, 15,  1, -1,
-  27,  4, -1,  1
+char   str[]   = "Adafruit 16x32 RGB LED Matrix";
+int    textX   = matrix.width(),
+       textMin = sizeof(str) * -12;
+long   hue     = 0;
+int8_t ball[3][4] = {
+  {  3,  0,  1,  1 }, // Initial X,Y pos & velocity for 3 bouncy balls
+  { 17, 15,  1, -1 },
+  { 27,  4, -1,  1 }
 };
-uint16_t ballcolor[3] = {
-  matrix.Color444(0,1,0),
-  matrix.Color444(0,0,1),
-  matrix.Color444(1,0,0)
+PROGMEM uint16_t ballcolor[3] = {
+  0x0080, // Green=1
+  0x0002, // Blue=1
+  0x1000  // Red=1
 };
 
 void setup() {
   matrix.begin();
+  matrix.setTextWrap(false); // Allow text to run off right edge
+  matrix.setTextSize(2);
 }
 
 void loop() {
   byte i;
 
   // Clear background
-  matrix.fill(0);
+  matrix.fillScreen(0);
 
   // Bounce three balls around
   for(i=0; i<3; i++) {
     // Draw 'ball'
-    matrix.fillCircle(ball[i][0], ball[i][1], 5, ballcolor[i]);
+    matrix.fillCircle(ball[i][0], ball[i][1], 5, pgm_read_word(&ballcolor[i]));
     // Update X, Y position
     ball[i][0] += ball[i][2];
     ball[i][1] += ball[i][3];
@@ -54,10 +57,10 @@ void loop() {
   }
 
   // Draw big scrolly text on top
-  matrix.setTextSize(2);
-  matrix.setCursor(textX, 1);
   matrix.setTextColor(matrix.ColorHSV(hue, 255, 255, true));
+  matrix.setCursor(textX, 1);
   matrix.print(str);
+
   // Move text left (w/wrap), increase hue
   if((--textX) < textMin) textX = matrix.width();
   hue += 7;

examples/scrolltext_16x32/scrolltext_16x32.pde

@@ -2,14 +2,15 @@
 // Renders 512 colors on a 16x32 RGB LED matrix.
 // Library supports 4096 colors, but there aren't that many pixels!
 
-#include "RGBmatrixPanel.h"
+#include <Adafruit_GFX.h>   // Core graphics library
+#include <RGBmatrixPanel.h> // Hardware-specific library
 
-#define A   A0
-#define B   A1
-#define C   A2
 #define CLK 8  // MUST be on PORTB!
 #define LAT A3
 #define OE  9
+#define A   A0
+#define B   A1
+#define C   A2
 RGBmatrixPanel matrix(A, B, C, CLK, LAT, OE, false);
 
 void setup() {

examples/testcolors_16x32/testcolors_16x32.pde

@@ -2,14 +2,15 @@
 // Demonstrates the drawing abilities of the RGBmatrixPanel library.
 // For 16x32 RGB LED matrix.
 
-#include "RGBmatrixPanel.h"
+#include <Adafruit_GFX.h>   // Core graphics library
+#include <RGBmatrixPanel.h> // Hardware-specific library
 
-#define A   A0
-#define B   A1
-#define C   A2
 #define CLK 8  // MUST be on PORTB!
 #define LAT A3
 #define OE  9
+#define A   A0
+#define B   A1
+#define C   A2
 RGBmatrixPanel matrix(A, B, C, CLK, LAT, OE, false);
 
 void setup() {
@@ -42,7 +43,7 @@ void setup() {
   delay(500);
 
   // fill the screen with 'black'
-  matrix.fill(matrix.Color333(0, 0, 0));
+  matrix.fillScreen(matrix.Color333(0, 0, 0));
 
   // draw some text!
   matrix.setCursor(1, 0);   // start at top left, with one pixel of spacing

examples/testshapes_16x32/testshapes_16x32.pde

@@ -2,7 +2,8 @@
 // Demonstrates the drawing abilities of the RGBmatrixPanel library.
 // For 32x32 RGB LED matrix.
 
-#include "RGBmatrixPanel.h"
+#include <Adafruit_GFX.h>   // Core graphics library
+#include <RGBmatrixPanel.h> // Hardware-specific library
 
 #define A   A3
 #define B   A2
@@ -43,11 +44,12 @@ void setup() {
   delay(500);
 
   // fill the screen with 'black'
-  matrix.fill(matrix.Color333(0, 0, 0));
+  matrix.fillScreen(matrix.Color333(0, 0, 0));
 
   // draw some text!
-  matrix.setCursor(1, 0);   // start at top left, with one pixel of spacing
-  matrix.setTextSize(1);    // size 1 == 8 pixels high
+  matrix.setCursor(1, 0);    // start at top left, with one pixel of spacing
+  matrix.setTextSize(1);     // size 1 == 8 pixels high
+  matrix.setTextWrap(false); // Don't wrap at end of line - will do ourselves
 
   matrix.setTextColor(matrix.Color333(7,7,7));
   matrix.println(" Ada");