Update examples - 32x32 and double-buffering no longer fit on Uno

Author: PaintYourDragon

examples/PanelGFXDemo_16x32/PanelGFXDemo_16x32.ino

@@ -9,16 +9,15 @@
 
 // Most of the signal pins are configurable, but the CLK pin has some
 // special constraints.  On 8-bit AVR boards it must be on PORTB...
-// Pin 8 works on the Arduino Uno & compatibles (e.g. Adafruit Metro),
 // Pin 11 works on the Arduino Mega.  On 32-bit SAMD boards it must be
 // on the same PORT as the RGB data pins (D2-D7)...
 // Pin 8 works on the Adafruit Metro M0 or Arduino Zero,
 // Pin A4 works on the Adafruit Metro M4 (if using the Adafruit RGB
 // Matrix Shield, cut trace between CLK pads and run a wire to A4).
 
-//#define CLK  8 // USE THIS ON ARDUINO UNO, ADAFRUIT METRO M0, etc.
+#define CLK  8   // USE THIS ON ADAFRUIT METRO M0, etc.
 //#define CLK A4 // USE THIS ON METRO M4 (not M0)
-#define CLK 11   // USE THIS ON ARDUINO MEGA
+//#define CLK 11 // USE THIS ON ARDUINO MEGA
 #define OE   9
 #define LAT 10
 #define A   A0

examples/colorwheel_32x32/colorwheel_32x32.ino

@@ -1,6 +1,7 @@
 // colorwheel demo for Adafruit RGBmatrixPanel library.
 // Renders a nice circle of hues on our 32x32 RGB LED matrix:
 // http://www.adafruit.com/products/607
+// 32x32 MATRICES DO NOT WORK WITH ARDUINO UNO or METRO 328.
 
 // Written by Limor Fried/Ladyada & Phil Burgess/PaintYourDragon
 // for Adafruit Industries.
@@ -10,14 +11,13 @@
 
 // Most of the signal pins are configurable, but the CLK pin has some
 // special constraints.  On 8-bit AVR boards it must be on PORTB...
-// Pin 8 works on the Arduino Uno & compatibles (e.g. Adafruit Metro),
 // Pin 11 works on the Arduino Mega.  On 32-bit SAMD boards it must be
 // on the same PORT as the RGB data pins (D2-D7)...
 // Pin 8 works on the Adafruit Metro M0 or Arduino Zero,
 // Pin A4 works on the Adafruit Metro M4 (if using the Adafruit RGB
 // Matrix Shield, cut trace between CLK pads and run a wire to A4).
 
-#define CLK  8   // USE THIS ON ARDUINO UNO, ADAFRUIT METRO M0, etc.
+#define CLK  8   // USE THIS ON ADAFRUIT METRO M0, etc.
 //#define CLK A4 // USE THIS ON METRO M4 (not M0)
 //#define CLK 11 // USE THIS ON ARDUINO MEGA
 #define OE   9

examples/colorwheel_progmem_32x32/colorwheel_progmem_32x32.ino

@@ -1,6 +1,7 @@
 // colorwheel_progmem demo for Adafruit RGBmatrixPanel library.
 // Renders a nice circle of hues on our 32x32 RGB LED matrix:
 // http://www.adafruit.com/products/607
+// 32x32 MATRICES DO NOT WORK WITH ARDUINO UNO or METRO 328P.
 
 // This version uses precomputed image data stored in PROGMEM
 // rather than calculating each pixel.  Nearly instantaneous!  Woo!
@@ -12,7 +13,7 @@
 #include <RGBmatrixPanel.h>
 #include "image.h" // Precomputed colorwheel image is here
 
-#define CLK  8   // USE THIS ON ARDUINO UNO, ADAFRUIT METRO M0, etc.
+#define CLK  8   // USE THIS ON ADAFRUIT METRO M0, etc.
 //#define CLK A4 // USE THIS ON METRO M4 (not M0)
 //#define CLK 11 // USE THIS ON ARDUINO MEGA
 #define OE   9

examples/plasma_16x32/plasma_16x32.ino

@@ -1,6 +1,7 @@
 // plasma demo for Adafruit RGBmatrixPanel library.
 // Demonstrates double-buffered animation our 16x32 RGB LED matrix:
 // http://www.adafruit.com/products/420
+// DOUBLE-BUFFERED ANIMATION DOES NOT WORK WITH ARDUINO UNO or METRO 328.
 
 // Written by Limor Fried/Ladyada & Phil Burgess/PaintYourDragon
 // for Adafruit Industries.
@@ -10,14 +11,13 @@
 
 // Most of the signal pins are configurable, but the CLK pin has some
 // special constraints.  On 8-bit AVR boards it must be on PORTB...
-// Pin 8 works on the Arduino Uno & compatibles (e.g. Adafruit Metro),
 // Pin 11 works on the Arduino Mega.  On 32-bit SAMD boards it must be
 // on the same PORT as the RGB data pins (D2-D7)...
 // Pin 8 works on the Adafruit Metro M0 or Arduino Zero,
 // Pin A4 works on the Adafruit Metro M4 (if using the Adafruit RGB
 // Matrix Shield, cut trace between CLK pads and run a wire to A4).
 
-#define CLK  8   // USE THIS ON ARDUINO UNO, ADAFRUIT METRO M0, etc.
+#define CLK  8   // USE THIS ON ADAFRUIT METRO M0, etc.
 //#define CLK A4 // USE THIS ON METRO M4 (not M0)
 //#define CLK 11 // USE THIS ON ARDUINO MEGA
 #define OE   9
@@ -30,10 +30,6 @@
 // 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);
-// Double-buffered mode consumes nearly all the RAM available on the
-// Arduino Uno -- only a handful of free bytes remain.  So this code uses
-// a bunch of precalculated data in tables to minimize RAM usage and speed
-// things up.
 
 static const int8_t PROGMEM sinetab[256] = {
      0,   2,   5,   8,  11,  15,  18,  21,

examples/plasma_32x32/plasma_32x32.ino

@@ -1,6 +1,7 @@
 // plasma demo for Adafruit RGBmatrixPanel library.
 // Demonstrates unbuffered animation on our 32x32 RGB LED matrix:
 // http://www.adafruit.com/products/607
+// 32x32 MATRICES DO NOT WORK WITH ARDUINO UNO or METRO 328.
 
 // Written by Limor Fried/Ladyada & Phil Burgess/PaintYourDragon
 // for Adafruit Industries.
@@ -10,14 +11,13 @@
 
 // Most of the signal pins are configurable, but the CLK pin has some
 // special constraints.  On 8-bit AVR boards it must be on PORTB...
-// Pin 8 works on the Arduino Uno & compatibles (e.g. Adafruit Metro),
 // Pin 11 works on the Arduino Mega.  On 32-bit SAMD boards it must be
 // on the same PORT as the RGB data pins (D2-D7)...
 // Pin 8 works on the Adafruit Metro M0 or Arduino Zero,
 // Pin A4 works on the Adafruit Metro M4 (if using the Adafruit RGB
 // Matrix Shield, cut trace between CLK pads and run a wire to A4).
 
-#define CLK  8   // USE THIS ON ARDUINO UNO, ADAFRUIT METRO M0, etc.
+#define CLK  8   // USE THIS ON ADAFRUIT METRO M0, etc.
 //#define CLK A4 // USE THIS ON METRO M4 (not M0)
 //#define CLK 11 // USE THIS ON ARDUINO MEGA
 #define OE   9
@@ -28,9 +28,6 @@
 #define D   A3
 
 RGBmatrixPanel matrix(A, B, C, D, CLK, LAT, OE, false);
-// 32x32 matrix consumes nearly all the RAM available on the Arduino Uno --
-// only a handful of free bytes remain.  So this code uses a bunch of
-// precalculated data in tables to minimize RAM usage and speed things up.
 
 static const int8_t PROGMEM sinetab[256] = {
      0,   2,   5,   8,  11,  15,  18,  21,

examples/scrolltext_16x32/scrolltext_16x32.ino

@@ -1,6 +1,7 @@
 // scrolltext demo for Adafruit RGBmatrixPanel library.
 // Demonstrates double-buffered animation on our 16x32 RGB LED matrix:
 // http://www.adafruit.com/products/420
+// DOUBLE-BUFFERED ANIMATION DOES NOT WORK WITH ARDUINO UNO or METRO 328.
 
 // Written by Limor Fried/Ladyada & Phil Burgess/PaintYourDragon
 // for Adafruit Industries.
@@ -10,14 +11,13 @@
 
 // Most of the signal pins are configurable, but the CLK pin has some
 // special constraints.  On 8-bit AVR boards it must be on PORTB...
-// Pin 8 works on the Arduino Uno & compatibles (e.g. Adafruit Metro),
 // Pin 11 works on the Arduino Mega.  On 32-bit SAMD boards it must be
 // on the same PORT as the RGB data pins (D2-D7)...
 // Pin 8 works on the Adafruit Metro M0 or Arduino Zero,
 // Pin A4 works on the Adafruit Metro M4 (if using the Adafruit RGB
 // Matrix Shield, cut trace between CLK pads and run a wire to A4).
 
-#define CLK  8   // USE THIS ON ARDUINO UNO, ADAFRUIT METRO M0, etc.
+#define CLK  8   // USE THIS ON ADAFRUIT METRO M0, etc.
 //#define CLK A4 // USE THIS ON METRO M4 (not M0)
 //#define CLK 11 // USE THIS ON ARDUINO MEGA
 #define OE   9
@@ -30,9 +30,6 @@
 // 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);
-// Double-buffered mode consumes nearly all the RAM available on the
-// Arduino Uno -- only a handful of free bytes remain.  Even the
-// following string needs to go in PROGMEM:
 
 // Similar to F(), but for PROGMEM string pointers rather than literals
 #define F2(progmem_ptr) (const __FlashStringHelper *)progmem_ptr

examples/testshapes_32x32/testshapes_32x32.ino

@@ -2,6 +2,7 @@
 // Demonstrates the drawing abilities of the RGBmatrixPanel library.
 // For 32x32 RGB LED matrix:
 // http://www.adafruit.com/products/607
+// 32x32 MATRICES DO NOT WORK WITH ARDUINO UNO or METRO 328.
 
 // Written by Limor Fried/Ladyada & Phil Burgess/PaintYourDragon
 // for Adafruit Industries.
@@ -11,14 +12,13 @@
 
 // Most of the signal pins are configurable, but the CLK pin has some
 // special constraints.  On 8-bit AVR boards it must be on PORTB...
-// Pin 8 works on the Arduino Uno & compatibles (e.g. Adafruit Metro),
 // Pin 11 works on the Arduino Mega.  On 32-bit SAMD boards it must be
 // on the same PORT as the RGB data pins (D2-D7)...
 // Pin 8 works on the Adafruit Metro M0 or Arduino Zero,
 // Pin A4 works on the Adafruit Metro M4 (if using the Adafruit RGB
 // Matrix Shield, cut trace between CLK pads and run a wire to A4).
 
-#define CLK  8   // USE THIS ON ARDUINO UNO, ADAFRUIT METRO M0, etc.
+#define CLK  8   // USE THIS ON ADAFRUIT METRO M0, etc.
 //#define CLK A4 // USE THIS ON METRO M4 (not M0)
 //#define CLK 11 // USE THIS ON ARDUINO MEGA
 #define OE   9

examples/testshapes_32x64/testshapes_32x64.ino

@@ -8,7 +8,6 @@
 
 // Most of the signal pins are configurable, but the CLK pin has some
 // special constraints.  On 8-bit AVR boards it must be on PORTB...
-// Pin 8 works on the Arduino Uno & compatibles (e.g. Adafruit Metro),
 // Pin 11 works on the Arduino Mega.  On 32-bit SAMD boards it must be
 // on the same PORT as the RGB data pins (D2-D7)...
 // Pin 8 works on the Adafruit Metro M0 or Arduino Zero,