add quadcolor display

examples/ThinkInk_quadcolor/ThinkInk_quadcolor.ino

@@ -0,0 +1,112 @@
+/***************************************************
+  Adafruit invests time and resources providing this open source code,
+  please support Adafruit and open-source hardware by purchasing
+  products from Adafruit!
+
+  Written by Limor Fried/Ladyada for Adafruit Industries.
+  MIT license, all text above must be included in any redistribution
+ ****************************************************/
+
+#include "Adafruit_ThinkInk.h"
+
+#ifdef ARDUINO_ADAFRUIT_FEATHER_RP2040_THINKINK // detects if compiling for
+                                                // Feather RP2040 ThinkInk
+#define EPD_DC PIN_EPD_DC       // ThinkInk 24-pin connector DC
+#define EPD_CS PIN_EPD_CS       // ThinkInk 24-pin connector CS
+#define EPD_BUSY PIN_EPD_BUSY   // ThinkInk 24-pin connector Busy
+#define SRAM_CS -1              // use onboard RAM
+#define EPD_RESET PIN_EPD_RESET // ThinkInk 24-pin connector Reset
+#define EPD_SPI &SPI1           // secondary SPI for ThinkInk
+#else
+#define EPD_DC 10
+#define EPD_CS 9
+#define EPD_BUSY 7 // can set to -1 to not use a pin (will wait a fixed delay)
+#define SRAM_CS 6
+#define EPD_RESET 8  // can set to -1 and share with microcontroller Reset!
+#define EPD_SPI &SPI // primary SPI
+#endif
+
+// 2.13" Quadcolor EPD with JD79661 chipset
+ThinkInk_213_Quadcolor_AJHE5 display(EPD_DC, EPD_RESET, EPD_CS, SRAM_CS, EPD_BUSY,
+                                     EPD_SPI);
+
+void setup() {
+  Serial.begin(115200);
+  while (!Serial) {
+    delay(10);
+  }
+  Serial.println("Adafruit EPD full update test in red/yellow/black/white");
+  display.begin(THINKINK_QUADCOLOR);
+}
+
+void loop() {
+  Serial.println("Banner demo");
+  display.clearBuffer();
+  display.setTextSize(3);
+  display.setCursor((display.width() - 144) / 2, (display.height() - 24) / 2);
+  String text = "QuadColor";
+  uint16_t colors[] = {EPD_BLACK, EPD_RED, EPD_YELLOW};
+  
+  for (int i = 0; i < text.length(); i++) {
+    // Change color for every character (0: BLACK, 1: RED, 2: YELLOW, 3: BLACK, etc.)
+    display.setTextColor(colors[i % 3]);
+    display.print(text.charAt(i));
+  }
+  display.display();
+  
+  delay(15000);
+
+  Serial.println("Color quadrant demo");
+  display.clearBuffer();
+  // Top-left quadrant - EPD_BLACK
+  display.fillRect(0, 0, display.width() / 2, display.height() / 2, EPD_BLACK);
+  // Top-right quadrant - EPD_RED  
+  display.fillRect(display.width() / 2, 0, display.width() / 2, display.height() / 2, EPD_RED);
+  // Bottom-left quadrant - EPD_YELLOW
+  display.fillRect(0, display.height() / 2, display.width() / 2, display.height() / 2, EPD_YELLOW);
+  // Bottom-right quadrant - assume you have a 4th color like EPD_WHITE or another color
+  display.fillRect(display.width() / 2, display.height() / 2, display.width() / 2, display.height() / 2, EPD_WHITE);
+
+  display.display();
+
+  delay(15000);
+
+  Serial.println("Text demo");
+  // large block of text
+  display.clearBuffer();
+  display.setTextSize(1);
+  testdrawtext(
+      "Lorem ipsum dolor sit amet, consectetur adipiscing elit. Curabitur "
+      "adipiscing ante sed nibh tincidunt feugiat. Maecenas enim massa, "
+      "fringilla sed malesuada et, malesuada sit amet turpis. Sed porttitor "
+      "neque ut ante pretium vitae malesuada nunc bibendum. Nullam aliquet "
+      "ultrices massa eu hendrerit. Ut sed nisi lorem. In vestibulum purus a "
+      "tortor imperdiet posuere. ",
+      EPD_BLACK);
+  display.display();
+
+  delay(15000);
+
+  display.clearBuffer();
+  for (int16_t i = 0; i < display.width(); i += 4) {
+    display.drawLine(0, 0, i, display.height() - 1, EPD_BLACK);
+  }
+  for (int16_t i = 0; i < display.height(); i += 4) {
+    display.drawLine(display.width() - 1, 0, 0, i, EPD_RED);
+  }
+  for (int16_t i = 0; i < display.width(); i += 4) {
+     display.drawLine(display.width()/2, display.height()-1, i, 0, 
+                      EPD_YELLOW);
+  }
+  
+  display.display();
+
+  delay(15000);
+}
+
+void testdrawtext(const char *text, uint16_t color) {
+  display.setCursor(0, 0);
+  display.setTextColor(color);
+  display.setTextWrap(true);
+  display.print(text);
+}

src/Adafruit_EPD.h

@@ -49,6 +49,7 @@ typedef enum {
   THINKINK_TRICOLOR,
   THINKINK_GRAYSCALE4,
   THINKINK_MONO_PARTIAL,
+  THINKINK_QUADCOLOR,
 } thinkinkmode_t;
 
 #define EPD_swap(a, b)                                                         \

src/Adafruit_ThinkInk.h

@@ -11,6 +11,8 @@
 #include "panels/ThinkInk_213_Tricolor_Z16.h"
 #include "panels/ThinkInk_213_Tricolor_MFGNR.h"
 
+#include "panels/ThinkInk_213_Quadcolor_AJHE5.h"
+
 #include "panels/ThinkInk_270_Tricolor_C44.h"
 #include "panels/ThinkInk_270_Tricolor_Z70.h"
 

src/drivers/Adafruit_JD79661.cpp

@@ -142,6 +142,8 @@ void Adafruit_JD79661::drawPixel(int16_t x, int16_t y, uint16_t color) {
   case 1:
     EPD_swap(x, y);
     x = _WIDTH - x - 1;
+    // remove the offset 
+    x -= _WIDTH - WIDTH;
     break;
   case 2:
     x = _WIDTH - x - 1;
@@ -162,6 +164,17 @@ void Adafruit_JD79661::drawPixel(int16_t x, int16_t y, uint16_t color) {
     pBuf = color_buffer + addr;
   }
 
+
+  if (color == EPD_BLACK) {
+    color = JD79661_BLACK;
+  } else if (color == EPD_RED) {
+    color = JD79661_RED;
+  } else if (color == EPD_YELLOW) {
+    color = JD79661_YELLOW;
+  } else if (color == EPD_WHITE) {
+    color = JD79661_WHITE;
+  }
+
   uint8_t byte_offset_mask = 0x3 << (3-(x % 4))*2;
   uint8_t byte_offset_value = (color & 0x3) << (3-(x % 4))*2;
 

src/panels/ThinkInk_213_Quadcolor_AJHE5.h

@@ -0,0 +1,29 @@
+#ifndef _THINKINK_213_QUADCOLOR_AJHE5_H
+#define _THINKINK_213_QUADCOLOR_AJHE5_H
+
+// This file is #included by Adafruit_ThinkInk.h and does not need to
+// #include anything else to pick up the EPD header or ink mode enum.
+
+class ThinkInk_213_Quadcolor_AJHE5 : public Adafruit_JD79661 {
+public:
+  ThinkInk_213_Quadcolor_AJHE5(int16_t SID, int16_t SCLK, int16_t DC, int16_t RST,
+                              int16_t CS, int16_t SRCS, int16_t MISO,
+                              int16_t BUSY = -1)
+    : Adafruit_JD79661(122, 250, SID, SCLK, DC, RST, CS, SRCS, MISO, BUSY){};
+
+  ThinkInk_213_Quadcolor_AJHE5(int16_t DC, int16_t RST, int16_t CS, int16_t SRCS,
+                              int16_t BUSY = -1, SPIClass *spi = &SPI)
+    : Adafruit_JD79661(122, 250, DC, RST, CS, SRCS, BUSY, spi){};
+  
+  void begin(thinkinkmode_t mode = THINKINK_QUADCOLOR) {
+    Adafruit_JD79661::begin(true);
+
+    inkmode = mode; // Preserve ink mode for ImageReader or others
+
+    default_refresh_delay = 13000;
+    setRotation(1);
+    powerDown();
+  }
+};
+
+#endif // _THINKINK_213_Quad