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e-Paper/Arduino/epd4in2b_V2/epd4in2b_V2.ino

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+/**
+ *  @filename   :   epd4in2b_V2.ino
+ *  @brief      :   4.2inch e-paper display (B_V2) demo 
+ *  @author     :   Yehui from Waveshare
+ *
+ *  Copyright (C) Waveshare     Nov 25 2020
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documnetation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to  whom the Software is
+ * furished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS OR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include <SPI.h>
+#include "epd4in2b_V2.h"
+#include "imagedata.h"
+#include "epdpaint.h"
+
+#define COLORED     0
+#define UNCOLORED   1
+
+void setup() {
+  // put your setup code here, to run once:
+  Serial.begin(115200);
+  Epd epd;
+
+  if (epd.Init() != 0) {
+    Serial.print("e-Paper init failed");
+    return;
+  }
+
+  /* This clears the SRAM of the e-paper display */
+  epd.Clear();
+
+  /**
+    * Due to RAM not enough in Arduino UNO, a frame buffer is not allowed.
+    * In this case, a smaller image buffer is allocated and you have to 
+    * update a partial display several times.
+    * 1 byte = 8 pixels, therefore you have to set 8*N pixels at a time.
+    */
+    unsigned char image[1600];
+    Paint paint(image, 128, 100);    //width should be the multiple of 8 
+    paint.SetWidth(128);
+    paint.SetHeight(100);
+
+    paint.Clear(UNCOLORED);
+    paint.DrawStringAt(0, 0, "ePaper Demo", &Font16, COLORED);
+    epd.Display_Window_Black(paint.GetImage(), 0);
+
+    paint.Clear(UNCOLORED);
+    paint.DrawRectangle(0, 0, 40, 50, COLORED);
+    paint.DrawLine(0, 0, 40, 50, COLORED);
+    paint.DrawLine(40, 0, 0, 50, COLORED);
+    epd.Display_Window_Black(paint.GetImage(), 1);    
+
+    paint.Clear(UNCOLORED);
+    paint.DrawCircle(32, 32, 25, COLORED);
+    epd.Display_Window_Black(paint.GetImage(), 1);    
+
+    paint.Clear(UNCOLORED);
+    paint.DrawStringAt(0, 20, "Hello world", &Font16, COLORED);
+    epd.Display_Window_Red(paint.GetImage(), 0);
+
+    paint.Clear(UNCOLORED);
+    paint.DrawFilledRectangle(60, 0, 100, 50, COLORED);
+    epd.Display_Window_Red(paint.GetImage(), 1);
+
+    paint.Clear(UNCOLORED);
+    paint.DrawFilledCircle(92, 32, 25, COLORED);
+    epd.Display_Window_Red(paint.GetImage(), 1);
+    epd.DisplayFrame();
+    delay(1000);
+    /* This displays an image */
+    // epd.DisplayFrame(IMAGE_BLACK, IMAGE_RED);
+
+  /* Deep sleep */
+  epd.Clear();
+  epd.Sleep();
+}
+
+void loop() {
+  // put your main code here, to run repeatedly:
+
+}