2019.06.24

Arduino UNO/epd4in2bc/epd4in2b/examples/epd4in2b-demo/epd4in2b-demo.ino

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+/**
+ *  @filename   :   epd4in2b-demo.ino
+ *  @brief      :   4.2inch e-paper display (B) demo
+ *  @author     :   Yehui from Waveshare
+ *
+ *  Copyright (C) Waveshare     August 22 2017
+ *
+ * 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.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(9600);
+  Epd epd;
+
+  if (epd.Init() != 0) {
+    Serial.print("e-Paper init failed");
+    return;
+  }
+
+  /* This clears the SRAM of the e-paper display */
+  epd.ClearFrame();
+
+  /**
+    * 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[1500];
+  Paint paint(image, 400, 28);    //width should be the multiple of 8 
+
+  paint.Clear(UNCOLORED);
+  paint.DrawStringAt(0, 0, "e-Paper Demo", &Font24, COLORED);
+  epd.SetPartialWindowBlack(paint.GetImage(), 100, 40, paint.GetWidth(), paint.GetHeight());
+
+  paint.Clear(COLORED);
+  paint.DrawStringAt(100, 2, "Hello world", &Font24, UNCOLORED);
+  epd.SetPartialWindowRed(paint.GetImage(), 0, 64, paint.GetWidth(), paint.GetHeight());
+  
+  paint.SetWidth(64);
+  paint.SetHeight(64);
+
+  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.SetPartialWindowBlack(paint.GetImage(), 72, 120, paint.GetWidth(), paint.GetHeight());
+  
+  paint.Clear(UNCOLORED);
+  paint.DrawCircle(32, 32, 30, COLORED);
+  epd.SetPartialWindowBlack(paint.GetImage(), 200, 120, paint.GetWidth(), paint.GetHeight());
+
+  paint.Clear(UNCOLORED);
+  paint.DrawFilledRectangle(0, 0, 40, 50, COLORED);
+  epd.SetPartialWindowRed(paint.GetImage(), 72, 200, paint.GetWidth(), paint.GetHeight());
+
+  paint.Clear(UNCOLORED);
+  paint.DrawFilledCircle(32, 32, 30, COLORED);
+  epd.SetPartialWindowRed(paint.GetImage(), 200, 200, paint.GetWidth(), paint.GetHeight());
+
+  /* This displays the data from the SRAM in e-Paper module */
+  epd.DisplayFrame();
+
+  /* This displays an image */
+  epd.DisplayFrame(IMAGE_BLACK, IMAGE_RED);
+
+  /* Deep sleep */
+  epd.Sleep();
+}
+
+void loop() {
+  // put your main code here, to run repeatedly:
+
+}
+

Arduino UNO/epd4in2bc/epd4in2b/examples/epd4in2b-demo/imagedata.h

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+/**
+ *  @filename   :   imagedata.h
+ *  @brief      :   head file for imagedata.cpp
+ *
+ *  Copyright (C) Waveshare     July 4 2017
+ *
+ * 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.
+ */
+
+extern const unsigned char IMAGE_BLACK[];
+extern const unsigned char IMAGE_RED[];
+
+/* FILE END */
+
+