Updates

7 files changed, 3 insertions, 914 deletions

diff --git a/examples/1_SimpleTestShapes/1_SimpleTestShapes.ino b/examples/1_SimpleTestShapes/1_SimpleTestShapes.ino
index db3b0d1..1d2ca75 100644
--- a/examples/1_SimpleTestShapes/1_SimpleTestShapes.ino
+++ b/examples/1_SimpleTestShapes/1_SimpleTestShapes.ino
@@ -100,9 +100,9 @@ void setup() {
     PANEL_CHAIN    // Chain length
   );
 
-  mxconfig.gpio.e = 18;
-  mxconfig.clkphase = false;
-  mxconfig.driver = HUB75_I2S_CFG::FM6126A;
+  //mxconfig.gpio.e = 18;
+  //mxconfig.clkphase = false;
+  //mxconfig.driver = HUB75_I2S_CFG::FM6126A;
 
   // Display Setup
   dma_display = new MatrixPanel_I2S_DMA(mxconfig);
diff --git a/examples/3_FM6126Panel/3_FM6126Panel.ino b/examples/3_FM6126Panel/3_FM6126Panel.ino
deleted file mode 100644
index 3b706e1..0000000
--- a/examples/3_FM6126Panel/3_FM6126Panel.ino
+++ /dev/null
@@ -1,102 +0,0 @@
-// How to use this library with a FM6126 panel, thanks goes to:
-// https://github.com/hzeller/rpi-rgb-led-matrix/issues/746
-
-#include <Arduino.h>
-#include <ESP32-HUB75-MatrixPanel-I2S-DMA.h>
-#include <FastLED.h>
-
-////////////////////////////////////////////////////////////////////
-// FM6126 support is still experimental
-
-// Output resolution and panel chain length configuration
-#define PANEL_RES_X 64 	   // Number of pixels wide of each INDIVIDUAL panel module. 
-#define PANEL_RES_Y 32 	   // Number of pixels tall of each INDIVIDUAL panel module.
-#define PANEL_CHAIN 1      // Total number of panels chained one to another
-
-
-// placeholder for the matrix object
-MatrixPanel_I2S_DMA *dma_display = nullptr;
-
-///////////////////////////////////////////////////////////////
-
-// FastLED variables for pattern output
-uint16_t time_counter = 0, cycles = 0, fps = 0;
-unsigned long fps_timer;
-
-CRGB currentColor;
-CRGBPalette16 palettes[] = {HeatColors_p, LavaColors_p, RainbowColors_p, RainbowStripeColors_p, CloudColors_p};
-CRGBPalette16 currentPalette = palettes[0];
-
-
-CRGB ColorFromCurrentPalette(uint8_t index = 0, uint8_t brightness = 255, TBlendType blendType = LINEARBLEND) {
-  return ColorFromPalette(currentPalette, index, brightness, blendType);
-}
-
-void setup(){
-	
-	/*
-		The configuration for MatrixPanel_I2S_DMA object is held in HUB75_I2S_CFG structure,
-		All options has it's predefined default values. So we can create a new structure and redefine only the options we need
-
-		Please refer to the '2_PatternPlasma.ino' example for detailed example of how to use the MatrixPanel_I2S_DMA configuration
-		if you need to change the pin mappings etc.
-	*/
-
-	HUB75_I2S_CFG mxconfig(
-				PANEL_RES_X,   // module width
-				PANEL_RES_Y,   // module height
-				PANEL_CHAIN    // Chain length
-	);
-
-	mxconfig.driver = HUB75_I2S_CFG::FM6126A;     // in case that we use panels based on FM6126A chip, we can set it here before creating MatrixPanel_I2S_DMA object
-
-	// OK, now we can create our matrix object
-	dma_display = new MatrixPanel_I2S_DMA(mxconfig);
-	
-    // If you experience ghosting, you will need to reduce the brightness level, not all RGB Matrix
-    // Panels are the same - some seem to display ghosting artefacts at lower brightness levels.
-    // In the setup() function do something like:
-
-    // let's adjust default brightness to about 75%
-    dma_display->setBrightness8(192);    // range is 0-255, 0 - 0%, 255 - 100%
-	
-    // Allocate memory and start DMA display
-    if( not dma_display->begin() )
-      Serial.println("****** !KABOOM! Insufficient memory - allocation failed ***********");	
-	
-    fps_timer = millis();
-	
-}
-
-void loop(){
-   for (int x = 0; x <  dma_display->width(); x++) {
-        for (int y = 0; y <  dma_display->height(); y++) {
-            int16_t v = 0;
-            uint8_t wibble = sin8(time_counter);
-            v += sin16(x * wibble * 3 + time_counter);
-            v += cos16(y * (128 - wibble)  + time_counter);
-            v += sin16(y * x * cos8(-time_counter) / 8);
-
-            currentColor = ColorFromPalette(currentPalette, (v >> 8) + 127); //, brightness, currentBlendType);
-            dma_display->drawPixelRGB888(x, y, currentColor.r, currentColor.g, currentColor.b);
-        }
-    }
-
-    ++time_counter;
-    ++cycles;
-    ++fps;
-
-    if (cycles >= 1024) {
-        time_counter = 0;
-        cycles = 0;
-        currentPalette = palettes[random(0,sizeof(palettes)/sizeof(palettes[0]))];
-    }
-
-    // print FPS rate every 5 seconds
-    // Note: this is NOT a matrix refresh rate, it's the number of data frames being drawn to the DMA buffer per second
-    if (fps_timer + 5000 < millis()){
-      Serial.printf_P(PSTR("Effect fps: %d\n"), fps/5);
-      fps_timer = millis();
-      fps = 0;
-    }
-}
\ No newline at end of file
diff --git a/examples/3_FM6126Panel/FM6126A.md b/examples/3_FM6126Panel/FM6126A.md
deleted file mode 100644
index 1641c16..0000000
--- a/examples/3_FM6126Panel/FM6126A.md
+++ /dev/null
@@ -1,51 +0,0 @@
-## The mystery of control registers for FM6126A chips
-
-  
-The only available Datasheet for this chips is in Chinese and does not shed a light on what those two control regs are.
-
-An excellent insight could be found here https://github.com/hzeller/rpi-rgb-led-matrix/issues/746#issuecomment-453860510
-
-  
-
-So there are two regs in this chip - **REG1** and **REG2**,
-one could be written with 12 clock pulses (and usually called reg12, dunno why :))
-the other one could be written with 13 clock pulses (and usually called reg13, dunno why :))
-  
-
-I've done some measurements on power consumption while toggling bits of **REG1** and it looks that it could provide a fine grained brightness control over the entire matrix with no need for bitbanging over RGB or EO pins.
-There are 6 bits (6 to 11) giving an increased brightness (compared to all-zeroes) and 4 bits (2-5) giving decreased brightness!!!
-Still unclear if FM6112A brightness control is internally PWMed or current limited, might require some poking with oscilloscope.
-
-So it seems that the most bright (and hungry for power) value is bool REG1[16] = {0,0,0,0,0, 1,1,1,1,1,1, 0,0,0,0,0}; and not {0,1,1,1,1, 1,1,1,1,1,1, 1,1,1,1,1} as it is usually used.
-I'm not sure about bit 1 - it is either not used or I was unable to measure it's influence to brightness/power.
-
-Giving at least 10 bits of hardware brightness control opens pretty nice options for offloading and simplifying matrix output. Should dig into this more deeper.
-
-Here are some of the measurements I've took for 2 64x64 panels filled with white color - reg value and corresponding current drain in amps.
-  
-
-|REG1 |bit value|Current, amps |
-|--|--|--|
-|REG1| 0111111 00000| >5 amps|
-|REG1| 0100010 00000| 3.890 amp|
-|REG1| 0100000 00000| 3.885 amp|
-|REG1| 0011110 00000| 3.640 amp|
-|REG1| 0011100 00000| 3.620 amp|
-|REG1| 0011000 00000| 3.240 amp|
-|REG1| 0010010 00000| 2.520 amp|
-|REG1| 0010001 00000| 2.518 amp|
-|REG1| 0010001 10000| 2.493 amp|
-|REG1| 0010000 00000| 2.490 amp|
-|REG1| 0010000 11110| 2.214 amp|
-|REG1| 0001100 00000| 2.120 amp|
-|REG1| 0001000 00000| 1.750 amp|
-|REG1| 0000100 00000| 1.375 amp|
-|REG1| 0000010 00000| 1.000 amp|
-|REG1| **0000000 00000**| 0.995 amp|
-|REG1| 0000001 11111| 0.700 amp|
-|REG1| 0000000 01111| 0.690 amp|
-|REG1| 0000000 10000| 0.690 amp|
-|REG1| 0000000 11110| 0.686 amp|
-
-
-/Vortigont/
\ No newline at end of file
diff --git a/examples/3_FM6126Panel/README.md b/examples/3_FM6126Panel/README.md
deleted file mode 100644
index 65019e6..0000000
--- a/examples/3_FM6126Panel/README.md
+++ /dev/null
@@ -1,3 +0,0 @@
-## FM6126 based LED Matrix Panel Reset ##
-
-FM6216 panels require a special reset sequence before they can be used, check your panel chipset if you have issues. Refer to this example.
diff --git a/examples/One_Quarter_1_4_ScanPanel/OneQuarterScanMatrixPanel.h b/examples/One_Quarter_1_4_ScanPanel/OneQuarterScanMatrixPanel.h
deleted file mode 100644
index 885b937..0000000
--- a/examples/One_Quarter_1_4_ScanPanel/OneQuarterScanMatrixPanel.h
+++ /dev/null
@@ -1,451 +0,0 @@
-
-/*
-  Patch class for 32x16 RGB Matrix panels
-
-  reimplement all functions which use x,y coordinates
-  
-*/
-
-#ifndef ESP_HUB75_32x16MatrixPanel
-#define ESP_HUB75_32x16MatrixPanel
-
-#include "ESP32-HUB75-MatrixPanel-I2S-DMA.h"
-#include <Fonts/FreeSansBold12pt7b.h>
-#include "glcdfont.c"
-
-struct VirtualCoords {
-  int16_t x;
-  int16_t y;
-};
-
-#define VP_WIDTH 32
-#define VP_HEIGHT 16
-#define DEFAULT_FONT_W 5
-#define DEFAULT_FONT_H 7
-#define PIXEL_SPACE 1       // space between chars in a string
-
-
-/* --- PRINTF_BYTE_TO_BINARY macro's --- */
-#define PRINTF_BINARY_PATTERN_INT8 "%c%c%c%c%c%c%c%c"
-#define PRINTF_BYTE_TO_BINARY_INT8(i)    \
-    (((i) & 0x80ll) ? '1' : '0'), \
-    (((i) & 0x40ll) ? '1' : '0'), \
-    (((i) & 0x20ll) ? '1' : '0'), \
-    (((i) & 0x10ll) ? '1' : '0'), \
-    (((i) & 0x08ll) ? '1' : '0'), \
-    (((i) & 0x04ll) ? '1' : '0'), \
-    (((i) & 0x02ll) ? '1' : '0'), \
-    (((i) & 0x01ll) ? '1' : '0')
-
-#define PRINTF_BINARY_PATTERN_INT16 \
-    PRINTF_BINARY_PATTERN_INT8              PRINTF_BINARY_PATTERN_INT8
-#define PRINTF_BYTE_TO_BINARY_INT16(i) \
-    PRINTF_BYTE_TO_BINARY_INT8((i) >> 8),   PRINTF_BYTE_TO_BINARY_INT8(i)
-
-
-/* --- end macros --- */
-
-
-class QuarterScanMatrixPanel : public Adafruit_GFX
-{
-
-  public:
-
-    MatrixPanel_I2S_DMA *display;
-
-    QuarterScanMatrixPanel(MatrixPanel_I2S_DMA &disp)  : Adafruit_GFX(64, 32)
-    {
-      this->display = &disp;
-      size_x = size_y = 1 ;
-      wrap = false;
-      cursor_x = cursor_y = 0;
-      dir = 1;
-      loop = true;
-
-    }
-
-    VirtualCoords getCoords(int16_t x, int16_t y);
-    int16_t getVirtualX(int16_t x) {
-      VirtualCoords coords = getCoords(x, 0);
-      return coords.x;
-    }
-    int16_t getVirtualY(int16_t y) {
-      VirtualCoords coords = getCoords(0,y);
-      return coords.y;
-    }
-//    int16_t getVirtualY(int16_t y) {return getCoords(0,y).y;}
-    /** extended function to draw lines/rects/... **/
-    virtual uint8_t width() {return VP_WIDTH;};
-    virtual uint8_t height() {return VP_HEIGHT;};
-
-    virtual void drawLine(int16_t x0, int16_t y0, int16_t x1, int16_t y1, uint16_t color);
-    virtual void drawHLine(int16_t x0, int16_t y0, int16_t w, uint16_t color);
-    virtual void drawVLine(int16_t x0, int16_t y0, int16_t h, uint16_t color);
-    virtual void fillRect(int16_t x, int16_t y, int16_t w, int16_t h, uint16_t color);
-    
-    virtual void drawChar(int16_t x, int16_t y, unsigned char c, uint16_t color, uint16_t bg, uint8_t size);
-    virtual void drawChar(int16_t x, int16_t y, unsigned char c, uint16_t color, uint16_t bg, uint8_t size_x, uint8_t size_y);
-    virtual void scrollChar(int16_t x, int16_t y, unsigned char c, uint16_t color, uint16_t bg, uint16_t dir, uint16_t speed);
-    virtual void drawString(int16_t x, int16_t y, unsigned char* c, uint16_t color, uint16_t bg);
-    virtual size_t write(unsigned char c);   // write a character on current cursor position
-    virtual size_t write(const char *str);  // write a character array (string) on current cursor position
-
-    virtual void setTextWrap(bool w);
-    virtual void setCursor (int16_t x, int16_t y);
-    void setTextFGColor(uint16_t color) {textFGColor = color;};
-    void setTextBGColor(uint16_t color) {textBGColor = color;};
-    void setTextSize(uint8_t x, uint8_t y) {size_x = x; size_y = y;}; // magnification, default = 1
-
-    void setScrollDir(uint8_t d = 1) { dir = (d != 1) ? 0 : 1;};    // set scroll dir default = 1
-    void setScroolLoop (bool b = true) { loop = b;} ;               // scroll text in a loop, default true
-    void scrollText(const char *str, uint16_t speed, uint16_t pixels);
-    /**------------------------------------------**/
-
-    // equivalent methods of the matrix library so it can be just swapped out.
-    virtual void drawPixel(int16_t x, int16_t y, uint16_t color);
-    virtual void fillScreen(uint16_t color); // overwrite adafruit implementation
-    void clearScreen() { fillScreen(0); }
-    //void drawPixelRGB565(int16_t x, int16_t y, uint16_t color);
-    void drawPixelRGB888(int16_t x, int16_t y, uint8_t r, uint8_t g, uint8_t b);
-    //void drawPixelRGB24(int16_t x, int16_t y, RGB24 color);
-    void drawIcon (int *ico, int16_t x, int16_t y, int16_t module_cols, int16_t module_rows);
-
-    uint16_t color444(uint8_t r, uint8_t g, uint8_t b) {
-      return display->color444(r, g, b);
-    }
-    uint16_t color565(uint8_t r, uint8_t g, uint8_t b) {
-      return display->color565(r, g, b);
-    }
-    uint16_t color333(uint8_t r, uint8_t g, uint8_t b) {
-      return display->color333(r, g, b);
-    }
-	
-	void flipDMABuffer() { display->flipDMABuffer(); }
-	void showDMABuffer() { display->showDMABuffer(); }
-
-    void drawDisplayTest();
-
-  protected:
-    int16_t cursor_x, cursor_y;   // Cursor position
-    uint8_t size_x, size_y;       // Font size Multiplier default = 1 => 5x7 Font (5width,7Height)
-    uint16_t textFGColor, textBGColor;
-    bool wrap ;           //  < If set, 'wrap' text at right edge of display 
-    uint8_t dir ;   // used for scrolling text direction
-    bool loop ;           // used for scrolling text in a loop
-
-  private:
-    VirtualCoords coords;
-
-}; // end Class header
-
-
-/***************************************************************************************
-
-  @brief scroll text from right to left or vice versa on current cursor position
-  please note, this function is not interruptable.
-
-  @param *c pointer to \0 terminated string
-  @param pixels number of pixels to scroll, if 0, than scroll complete text
-  @param speed velocity of scrolling in ms
-***************************************************************************************/
-void QuarterScanMatrixPanel::scrollText(const char *str,uint16_t speed,  uint16_t pixels = 0) {
-  // first we put all columns of every char inside str into a big array of lines
-  // than we move through this array and draw line per line and move this line
-  // one position to dir
-  const uint8_t xSize = 6;
-  uint16_t len = strlen(str);
-  uint8_t array[len * xSize];         // size of array number of chars * width of char
-  //uint16_t lenArray = sizeof(array)/sizeof(array[0]);
-  uint16_t aPtr = 0;
-  //
-  // generate array
-  char c = *str;
-  // Serial.printf("size *str (%d), size array: (%d) \n", len, lenArray);
-
-  while (c) {
-    // Serial.printf("** %c ** \n", c);
-    // read font line per line. A line is a column inside a char
-    for (int8_t i = 0; i < 5; i++) {
-      uint8_t line = pgm_read_byte(&font[c * 5 + i]); 
-      array[aPtr++] = line;
-      // Serial.printf("%d - Line " PRINTF_BINARY_PATTERN_INT8 "\n", i, PRINTF_BYTE_TO_BINARY_INT8(line) );
-    }
-    str++;
-    c = *str;
-    array[aPtr++] = 0x00;     // line with 0 (space between chars)
-
-  }
-  array[aPtr++] = 0x00;     // line with 0 (space between chars)
-/*
-  Serial.printf("---------------------------- \n");
-  for (aPtr=0; aPtr < (len*xSize); aPtr++) {
-    Serial.printf("%d - Line " PRINTF_BINARY_PATTERN_INT8 "\n", aPtr, PRINTF_BYTE_TO_BINARY_INT8(array[aPtr]) );
-  }
-*/
-
-  int16_t x,y,lastX, p;
-  lastX = (dir) ? VP_WIDTH : 0;
-  x = cursor_x;
-  y = cursor_y;
-  Serial.printf("X: %d, Y: %d \n", x,y);
-  p=0;
-  pixels = (pixels) ? pixels : len * xSize;
-
-  while (p <= pixels) {
-    // remove last pixel positions
-    fillRect(x,y,5,7,textBGColor);
-    // set new pixel position
-    x = (dir) ? lastX - p : lastX + p - pixels;
-    // iterator through our array
-    for (uint8_t i=0; i < (len*xSize); i++) {
-      uint8_t line = array[i];
-      //Serial.printf("%d:%d : " PRINTF_BINARY_PATTERN_INT8 "\n", x, i, PRINTF_BYTE_TO_BINARY_INT8(line) );
-      // read line and shift from right to left
-      // start with bit 0 (top of char) to 7(bottom)
-      for (uint8_t j=0; j < 8; j++, line>>=1) {
-        if (line & 1) {
-          // got 1, if x + i outside panel ignore pixel
-          if (x + i >= 0 && x + i < VP_WIDTH) {
-            drawPixel(x + i, y + j, textFGColor);
-          }
-        }
-        else {
-          // got 0
-          if (x + i >= 0 && x + i < VP_WIDTH) {
-            drawPixel(x + i, y + j, textBGColor);
-          }
-        } // if
-      } // for j
-    } // for i
-    p++;
-    delay(speed);
-
-  } // while 
-}
-
-inline size_t QuarterScanMatrixPanel::write(const char *str) {
-  uint8_t x, y;
-  x=cursor_x;
-  y=cursor_y;
-  char c = *str;
-  while (c) {
-    //Serial.printf("%c ", c);
-    write(c);
-    str++;
-    c = *str;  
-    x = x + ((DEFAULT_FONT_W + PIXEL_SPACE) * size_x);
-    setCursor(x,y);
-  }
-  Serial.printf("\n");
-  return 1;
-}
-
-inline size_t QuarterScanMatrixPanel::write(unsigned char c) {
-  Serial.printf("\twrite(%d, %d, %c)\n", cursor_x, cursor_y, c);
-  drawChar(cursor_x, cursor_y, c, textFGColor, textBGColor, size_x, size_y);
-  return 1;
-}
-
-void QuarterScanMatrixPanel::setTextWrap(bool w) {this->display->setTextWrap(w);}
-void QuarterScanMatrixPanel::setCursor(int16_t x, int16_t y) {
-  cursor_x = x;
-  cursor_y = y;
-}
-
-
-/* - new for 16x32 panels - */
-inline void QuarterScanMatrixPanel::drawLine(int16_t x, int16_t y, int16_t x1, int16_t y1, uint16_t color)
-{
-  int16_t a,b;
-  for (a=x; a <= x1; a++) {
-    for (b=y; b <= y1; b++) {
-      drawPixel(a,b,color);
-    }
-  }
-}
-
-inline void QuarterScanMatrixPanel::drawHLine(int16_t x, int16_t y, int16_t w, uint16_t color)
-{
-  drawLine(x,y,x+w,y, color);
-}
-
-inline void QuarterScanMatrixPanel::drawVLine(int16_t x, int16_t y, int16_t h, uint16_t color)
-{
-  drawLine(x,y,x,y+h, color);
-}
-
-inline void QuarterScanMatrixPanel::fillRect(int16_t x, int16_t y, int16_t w, int16_t h, uint16_t color) 
-{
-  for (int16_t i = x; i < x + w; i++) {
-    drawVLine(i, y, h, color);
-  } 
-}
-
-void QuarterScanMatrixPanel::drawChar(int16_t x, int16_t y, unsigned char c, uint16_t color, uint16_t bg, uint8_t size)
-{
-  drawChar(x,y,c,color, bg, size, size);
-}
-
-inline void QuarterScanMatrixPanel::scrollChar(int16_t x, int16_t y, unsigned char c, uint16_t color, uint16_t bg, uint16_t dir, uint16_t speed){
-
-  if ((x >= VP_WIDTH) ||
-    (y >= VP_HEIGHT) ||
-    ((x + 6 * size_x-1) < 0) ||
-    ((y + 8 * size_y-1) <0))
-    return; 
-  setTextWrap(true);  
-  // text wrap is only for the right end of the panel, to scroll soft out of the left of panel
-  // algorithm should wrap the character from left to right
-
-
-  // loop s = scroll-loop, scrolls char 5 pixels into dir
-  uint8_t lastX = x;
-  for (int8_t s = 0; s < 6; s++) {
-    // loop i : width of a character 
-    Serial.printf("X:%d ", x);
-
-    // clear current position
-    fillRect(x,y,5,7,0);
-    x = lastX - s;
-    for (int8_t i = 0; i < 5; i++) {
-      // first line is the first vertical part of a character and 8bits long
-      // last bit is everytime 0
-      // we read 5 lines with 8 bit (5x7 char + 8bit with zeros)
-      // Example : char A (90deg cw)
-      // 01111100
-      // 00010010
-      // 00010001
-      // 00010010
-      // 01111100
-      uint8_t line = pgm_read_byte(&font[c * 5 + i]); 
-      // shift from right to left bit per bit  
-      // loop j = height of a character
-      // loop through a column of current character
-      Serial.printf("i:%d ", i);
-      // ignore all pixels outside panel
-      if (x+i >= VP_WIDTH) continue;
-
-      for (int8_t j=0; j < 8; j++, line >>= 1) {
-        if (line & 1) {
-          Serial.printf
-          (" ON %d", x+i);
-          // we read 1
-          if (x >= 0) {
-            drawPixel(x+i, y+j, color);
-          }
-          else if (x+i >= 0) {
-            drawPixel(x+i, y+j, color);
-          }
-        }
-        else if (bg != color) {
-          // we read 0
-          Serial.printf(" OFF %d", x+i);
-
-          if (x >= 0) {
-            drawPixel(x+i, y+j, bg);
-          }
-          else if (x+i >= 0) {
-            drawPixel(x+i, y+j, bg);
-          }        
-        }
-      }
-    }
-    Serial.printf("\n");
-    delay(speed);
-  }
-}
-
-
-inline void QuarterScanMatrixPanel::drawChar(int16_t x, int16_t y, unsigned char c, uint16_t color, uint16_t bg, uint8_t size_x, uint8_t size_y)
-{
-  //Serial.printf("unmapped : drawChar(%d, %d, %c) \n",x, y, c);
-
-  // note: remapping to 16x32 coordinates is done inside drawPixel() or fillRect
-
-  if ((x >= VP_WIDTH) ||
-      (y >= VP_HEIGHT) ||
-      ((x + 6 * size_x-1) < 0) ||
-      ((y + 8 * size_y-1) <0))
-      return;
-  //Serial.printf("Font-Array : %d \n", sizeof(font));
-  for (int8_t i = 0; i < 5; i++) {
-      uint8_t line = pgm_read_byte(&font[c * 5 + i]);
-      //Serial.printf("%d - Line " PRINTF_BINARY_PATTERN_INT8 "\n", i, PRINTF_BYTE_TO_BINARY_INT8(line) );
-      for (int8_t j = 0; j < 8; j++, line >>= 1) {
-        if (line & 1) {
-          if (size_x == 1 && size_y == 1)
-            //Serial.printf("");
-            drawPixel(x + i, y + j, color);
-          else
-            // remark: it's important to call function with original coordinates for x/y
-            fillRect(x + i * size_x, y + j * size_y, size_x, size_y,
-                          color);
-        } else if (bg != color) {
-          if (size_x == 1 && size_y == 1)
-            drawPixel(x + i, y + j, bg);
-          else
-            // remark: it's important to call function with original coordinates for x/y
-            fillRect(x + i * size_x, y + j * size_y, size_x, size_y, bg);
-        }
-      }
-    }
-
-}
-
-inline void QuarterScanMatrixPanel::drawString(int16_t x, int16_t y, unsigned char* c, uint16_t color, uint16_t bg) {
-
-}
-
-inline VirtualCoords QuarterScanMatrixPanel::getCoords(int16_t x, int16_t y)
-{
-  const int y_remap[] = { 0,1,8,9,4,5,12,13,16,17,24,25,22,23,30,31 };
-  if (y > VP_HEIGHT) 
-    y = VP_HEIGHT;
-  if (x > VP_WIDTH)
-    x = VP_WIDTH;
-  coords.x = x + VP_WIDTH;
-  coords.y = y_remap[y];
-  return coords;  
-}
-
-
-/* -------------------------*/
-
-inline void QuarterScanMatrixPanel::drawPixel(int16_t x, int16_t y, uint16_t color)
-{
-  VirtualCoords coords = getCoords(x, y);
-  this->display->drawPixel(coords.x, coords.y, color);
-}
-
-inline void QuarterScanMatrixPanel::fillScreen(uint16_t color)  // adafruit virtual void override
-{
-  // No need to map this.
-  this->display->fillScreen(color);
-}
-/*
-inline void QuarterScanMatrixPanel::drawPixelRGB565(int16_t x, int16_t y, uint16_t color)
-{
-  VirtualCoords coords = getCoords(x, y);
-  this->display->drawPixelRGB565( coords.x, coords.y, color);
-}
-*/
-
-
-inline void QuarterScanMatrixPanel::drawPixelRGB888(int16_t x, int16_t y, uint8_t r, uint8_t g, uint8_t b)
-{
-  VirtualCoords coords = getCoords(x, y);
-  this->display->drawPixelRGB888( coords.x, coords.y, r, g, b);
-}
-/*
-inline void QuarterScanMatrixPanel::drawPixelRGB24(int16_t x, int16_t y, RGB24 color)
-{
-  VirtualCoords coords = getCoords(x, y);
-  this->display->drawPixelRGB24(coords.x, coords.y, color);
-}
-*/
-
-
-// need to recreate this one, as it wouldn't work to just map where it starts.
-inline void QuarterScanMatrixPanel::drawIcon (int *ico, int16_t x, int16_t y, int16_t module_cols, int16_t module_rows) { }
-
-#endif
\ No newline at end of file
diff --git a/examples/One_Quarter_1_4_ScanPanel/One_Quarter_1_4_ScanPanel.ino b/examples/One_Quarter_1_4_ScanPanel/One_Quarter_1_4_ScanPanel.ino
deleted file mode 100644
index 16e47d8..0000000
--- a/examples/One_Quarter_1_4_ScanPanel/One_Quarter_1_4_ScanPanel.ino
+++ /dev/null
@@ -1,226 +0,0 @@
-/*************************************************************************
- * Contributor: https://github.com/mrRobot62  
- *
- * Description: 
- * 
- * The underlying implementation of the ESP32-HUB75-MatrixPanel-I2S-DMA only
- * supports output to 1/16 or 1/32 scan panels (two scan parallel scan lines)
- * this is fixed and cannot be changed.
- *
- * However, it is possible to connect 1/4 scan panels to this same library and
- * 'trick' the output to work correctly on these panels by way of adjusting the
- * pixel co-ordinates that are 'sent' to the ESP32-HUB75-MatrixPanel-I2S-DMA
- * library (in this example, it is the 'dmaOutput' class).
- * 
- * This is done by way of the 'QuarterScanMatrixPanel.h' class that sends
- * adjusted x,y co-ordinates to the underlying ESP32-HUB75-MatrixPanel-I2S-DMA 
- * library's drawPixel routine.
- *
- * Refer to the 'getCoords' function within 'QuarterScanMatrixPanel.h'
- *
- **************************************************************************/
- 
- // PLEASE NOTE THIS EXAMPLE NO LONGER WORKS AS OF AUGUST 2021
- // IT NEEDS TO BE UPDATED TO THE NEW WAY OF USING THE LIBRARY
-
-// uncomment to use custom pins, then provide below
-#define USE_CUSTOM_PINS 
-
-/* Pin 1,3,5,7,9,11,13,15 */
-#define R1_PIN  25
-#define B1_PIN  27
-#define R2_PIN  14
-#define B2_PIN  13
-#define A_PIN  23
-#define C_PIN  5
-#define CLK_PIN  16
-#define OE_PIN  15
-
-/* Pin 2,6,10,12,14 */
-#define G1_PIN  26
-#define G2_PIN  12
-#define B_PIN  19
-#define D_PIN  17
-#define LAT_PIN  4
-#define E_PIN  -1 // required for 1/32 scan panels
-
-#include "OneQuarterScanMatrixPanel.h" // Virtual Display to re-map co-ordinates such that they draw correctly on a 32x16 1/4 Scan panel 
-#include <Wire.h>
-
-/* 
- * Below is an is the 'legacy' way of initialising the MatrixPanel_I2S_DMA class.
- * i.e. MATRIX_WIDTH and MATRIX_HEIGHT are modified by compile-time directives.
- * By default the library assumes a single 64x32 pixel panel is connected.
- *
- * Refer to the example '2_PatternPlasma' on the new / correct way to setup this library
- * for different resolutions / panel chain lengths within the sketch 'setup()'.
- * 
- */
-MatrixPanel_I2S_DMA dmaOutput;
-
-// Create virtual 1/2 to 1/4 scan pixel co-ordinate mapping class.
-QuarterScanMatrixPanel display(dmaOutput);
-
-#include <FastLED.h>
-
-int time_counter = 0;
-int cycles = 0;
-
-CRGBPalette16 currentPalette;
-CRGB currentColor;
-
-
-CRGB ColorFromCurrentPalette(uint8_t index = 0, uint8_t brightness = 255, TBlendType blendType = LINEARBLEND) {
-  return ColorFromPalette(currentPalette, index, brightness, blendType);
-}
-
-typedef struct Matrix {
-  uint8_t x;
-  uint8_t y;
-} Matrix;
-
-Matrix matrix;
-
-
-void testSimpleChars(uint16_t timeout) {
-
-  /** drawChar() **/
-  Serial.println("draw chars with drawChar()");
-  display.fillScreen(display.color444(0,0,0));
-
-  uint16_t myFGColor = display.color565(180,0,0);
-  uint16_t myBGColor = display.color565(0,50,0);
-  display.fillScreen(display.color444(0,0,0));
-  display.drawChar(0,0,'X',myFGColor, myFGColor,1);
-  display.drawChar(16,1,'Y',myFGColor, myBGColor,1);
-  display.drawChar(3,9,'Z',myFGColor, myFGColor,1);
-  display.drawChar(16,9,'4',display.color565(0,220,0), myBGColor,1);
-  delay(timeout);
-
-}
-
-void testSimpleCharString(uint16_t timeout) {
-  uint8_t x,y,w,h;
-  w = 6; h=8;
-  x = 0; y=0;
-  display.fillScreen(display.color444(0,0,0));
-  display.setTextFGColor(display.color565(0,60,180));
-  display.setCursor(x,y); display.write('L');
-  display.setCursor(x+w,y); display.write('u');
-  display.setCursor(x+(2*w),y); display.write('n');
-  display.setCursor(x+(3*w),y); display.write('a');
-  display.setTextFGColor(display.color565(180,60,140));
-  display.setCursor(x+(4*w),y); display.write('X');
-
-  delay(timeout);
-
-}
-
-void testTextString(uint16_t timeout) {
-  display.fillScreen(display.color444(0,0,0));
-  display.setTextFGColor(display.color565(0,60,255));
-
-  display.setCursor(0,5);
-  display.write("HURRA");
-  delay(timeout);
-}
-
-void testWrapChar(const char c, uint16_t speed, uint16_t timeout) {
-  display.setTextWrap(true);
-  for (uint8_t i = 32; i > 0; i--) {
-    display.fillScreen(display.color444(0,0,0));
-    display.setCursor(i, 5);
-    display.write(c);
-    delay(speed);
-  }
-  delay(timeout);
-}
-
-void testScrollingChar(const char c, uint16_t speed, uint16_t timeout) {
-  Serial.println("Scrolling Char");
-  uint16_t myFGColor = display.color565(180,0,0);
-  uint16_t myBGColor = display.color565(60,120,0);
-  display.fillScreen(display.color444(0,0,0));
-  display.setTextWrap(true);
-  // from right to left with wrap
-  display.scrollChar(31,5,c, myFGColor, myFGColor, 1, speed);
-  // left out with wrap
-  delay(500);
-  display.scrollChar(0,5,c, myBGColor, myBGColor, 1, speed);
-
-  delay(timeout);
-}
-
-void testScrollingText(const char *str, uint16_t speed, uint16_t timeout) {
-  Serial.println("Scrolling Text as loop");
-  // pre config
-  uint16_t red = display.color565(255,0,100);
-  uint16_t blue100 = display.color565(0,0,100);
-  uint16_t black = display.color565(0,0,0);
-  uint16_t green = display.color565(0,255,0);
-  uint16_t green150 = display.color565(0,150,0);
-
-  display.fillScreen(display.color565(0,0,0));
-  display.setCursor(31,5);
-  display.setScrollDir(1);
-
-  /** black background **/
-  display.setTextFGColor(green150);
-  display.scrollText("** Welcome **", speed);
-  display.fillScreen(black);
-  delay(timeout / 2) ;
-
-  /** scrolling with colored background */
-  display.fillRect(0,4,VP_WIDTH,8,blue100);
-  // scrolling, using default pixels size = length of string (not used parameter pixels)
-  display.setTextFGColor(red);
-  display.setTextBGColor(blue100);
-  display.scrollText(str, speed);
-  delay(timeout / 2) ;
-
-  // same as above but now from left to right
-  display.setScrollDir(0);
-  display.setTextFGColor(blue100);
-  display.setTextBGColor(red);
-  display.fillRect(0,4,VP_WIDTH,8,red);
-  display.scrollText(str, speed, 0);
-
-  delay(timeout);
-  display.fillScreen(black);
-  display.setTextFGColor(red);
-
-
-}
-
-void setup() {
-  
-  Serial.begin(115200);
-  delay(500);
-  Serial.println("*****************************************************");
-  Serial.println(" dmaOutput 32x16 !");
-  Serial.println("*****************************************************");
-
-#ifdef USE_CUSTOM_PINS
-  dmaOutput.begin(R1_PIN, G1_PIN, B1_PIN, R2_PIN, G2_PIN, B2_PIN, A_PIN, B_PIN, C_PIN, D_PIN, E_PIN, LAT_PIN, OE_PIN, CLK_PIN );  // setup the LED matrix
-#else
-  display.begin(true); // init buffers
-#endif
- 
-  // fill the screen with 'black'
-  display.fillScreen(display.color444(0, 0, 0));
-
-  // Set current FastLED palette
-  currentPalette = RainbowColors_p;
-    // display.fillScreen(display.color565(0, 0, 0));  
-}
-
-void loop() {
-  display.fillScreen(display.color444(0, 0, 0));
-  //testSimpleChars(1500);
-  //testSimpleCharString (1500); 
-  testTextString(2000);
-  // length = 16 bytes without \0
-  //testWrapChar('A', 250, 1500);
-  //testScrollingChar('X', 250, 2000);
-  testScrollingText("Scrolling 16x32", 100, 2000);
-} // end loop
\ No newline at end of file
diff --git a/examples/One_Quarter_1_4_ScanPanel/README.md b/examples/One_Quarter_1_4_ScanPanel/README.md
deleted file mode 100644
index 817ef5e..0000000
--- a/examples/One_Quarter_1_4_ScanPanel/README.md
+++ /dev/null
@@ -1,78 +0,0 @@
-# Using this library with 32x16 1/4 Scan Panels
-
-## Problem
-ESP32-HUB75-MatrixPanel-I2S-DMA library will not display output correctly with 1/4 scan panels such [as this](https://de.aliexpress.com/item/33017477904.html?spm=a2g0o.detail.1000023.16.1fedd556Yw52Zi&algo_pvid=4329f1c0-04d2-43d9-bdfd-7d4ee95e6b40&algo_expid=4329f1c0-04d2-43d9-bdfd-7d4ee95e6b40-52&btsid=9a8bf2b5-334b-45ea-a849-063d7461362e&ws_ab_test=searchweb0_0,searchweb201602_10,searchweb201603_60%5BAliExpress%2016x32%5D).
-
-## Solution
-It is possible to connect 1/4 scan panels to this library and 'trick' the output to work correctly on these panels by way of adjusting the pixel co-ordinates that are 'sent' to the ESP32-HUB75-MatrixPanel-I2S-DMA library (in this example, it is the 'dmaOutput' class).
-
-Creation of a 'QuarterScanMatrixPanel.h' class which sends an adjusted x,y co-ordinates to the underlying ESP32-HUB75-MatrixPanel-I2S-DMA library's drawPixel routine, to trick the output to look pixel perfect. Refer to the 'getCoords' function within 'QuarterScanMatrixPanel.h'
-
-## Limitations
-
-* Only one font (glcd - standard font) is implemented. This font can't be resized.
-
-## New functions (and adapted function) in this QuarterScanMatrixPanel class
-### drawLine
-`void drawLine(int16_t x0, int16_t y0, int16_t x1, int16_t y1, uint16_t color)`
-
-Parameters should be self explained. x0/y0 upper left corner, x1/y1 lower right corner
-
-### drawHLine
-`void drawHLine(int16_t x0, int16_t y0, int16_t w, uint16_t color)`
-
-Draw a fast horizontal line with length `w`. Starting at `x0/y0` 
-
-### drawVLine
-`void drawVLine(int16_t x0, int16_t y0, int16_t h, uint16_t color)`
-
-Draw a fast vertical line with length `h` Starting at `x0/y0` 
-
-### fillRect
-`void fillRect(int16_t x, int16_t y, int16_t w, int16_t h, uint16_t color)`
-
-Draw a rectangle starting at `x/y` with width `w` and height `h`in `color`
-
-### drawChar (5x7) Standard font
-`drawChar(int16_t x, int16_t y, unsigned char c, uint16_t color, uint16_t bg, uint8_t size)`
-
-Draw a char at position x/y in `color` with a background color `bg`
-`size` is ignored. 
-
-### writeChar (5x7)
-`size_t write(unsigned char c)`
-
-Write a char at current cursor position with current foreground and background color.
-
-### writeString (5x7)
-`size_t write(const char *c)`
-
-Write a string at current cursor position with current foreground and background color.
-You have to use `setCursor(x,y)` and `setTextFGColor() / setTextBGColor()`
-
-### drawString (5x7)
-`void drawString(int16_t x, int16_t y, unsigned char* c, uint16_t color, uint16_t bg)`
-
-Draw String at position x/y wit foreground `color` and background `bg`
-Example: `display.drawString(0,5,"**Welcome**",display.color565(0,60,255));`
-
-### void setScrollDir(uint8_t d = 1)
-Set scrolling direction 0=left to right, 1= right to left (default)
-
-### scrollText
-`void scrollText(const char *str, uint16_t speed, uint16_t pixels)`
-
-Scroll text `str` into `setScrollDir`. Speed indicates how fast in ms per pixel, pixels are the number pixes which should be scrolled, if not set or 0, than pixels is calculates by size of `*str`
-
-### drawPixel(int16_t x, int16_t y, uint16_t color)
-Draw a pixel at x/y in `color`. This function is the atomic function for all above drawing functions
-
-### clearScreen() (all pixels off (black))
-Same as `fillScreen(0)`
-
-
-## Example videos:
-https://user-images.githubusercontent.com/949032/104838449-4aae5600-58bb-11eb-802f-a358b49a9315.mp4
-
-https://user-images.githubusercontent.com/949032/104366906-5647f880-551a-11eb-9792-a6f8276629e6.mp4
-