Added modified waveshare demo code, busy is always HIGH

firmware/examples/EPD-WaveShare-Demo/.vscode/arduino.json

@@ -0,0 +1,6 @@
+{
+    "board": "espressif:esp32:nina_w10",
+    "configuration": "UploadSpeed=115200",
+    "port": "/dev/ttyUSB0",
+    "sketch": "EPD-WaveShare-Demo.ino"
+}

firmware/examples/EPD-WaveShare-Demo/.vscode/c_cpp_properties.json

@@ -0,0 +1,21 @@
+{
+    "configurations": [
+        {
+            "name": "Linux",
+            "includePath": [
+                "/home/rac/Arduino/hardware/espressif/esp32/cores/esp32"
+            ],
+            "browse": {
+                "limitSymbolsToIncludedHeaders": false,
+                "path": [
+                    "/home/rac/Arduino/hardware/espressif/esp32/cores/esp32"
+                ]
+            },
+            "intelliSenseMode": "clang-x64",
+            "compilerPath": "/usr/bin/gcc",
+            "cStandard": "c11",
+            "cppStandard": "c++17"
+        }
+    ],
+    "version": 4
+}

firmware/examples/EPD-WaveShare-Demo/.vscode/settings.json

@@ -0,0 +1,6 @@
+{
+    "files.associations": {
+        "array": "cpp",
+        "string_view": "cpp"
+    }
+}

firmware/examples/EPD-WaveShare-Demo/EPD-WaveShare-Demo.ino

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+/**
+ *  @filename   :   epd2in9-demo.ino
+ *  @brief      :   2.9inch e-paper display demo
+ *  @author     :   Yehui from Waveshare
+ *
+ *  Copyright (C) Waveshare     September 9 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 "epd2in9.h"
+#include "epdpaint.h"
+#include "imagedata.h"
+
+#define COLORED     0
+#define UNCOLORED   1
+
+/**
+  * 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[1024];
+Paint paint(image, 0, 0);    // width should be the multiple of 8 
+Epd epd;
+unsigned long time_start_ms;
+unsigned long time_now_s;
+
+void setup() {
+  // put your setup code here, to run once:
+  Serial.begin(115200);
+  if (epd.Init(lut_full_update) != 0) {
+      Serial.print("e-Paper init failed");
+      return;
+  }
+  Serial.println("Start clearing memory");
+
+  /** 
+   *  there are 2 memory areas embedded in the e-paper display
+   *  and once the display is refreshed, the memory area will be auto-toggled,
+   *  i.e. the next action of SetFrameMemory will set the other memory area
+   *  therefore you have to clear the frame memory twice.
+   */
+  epd.ClearFrameMemory(0xFF);   // bit set = white, bit reset = black
+  epd.DisplayFrame();
+  epd.ClearFrameMemory(0xFF);   // bit set = white, bit reset = black
+  epd.DisplayFrame();
+  Serial.println("Memory cleared");
+
+  paint.SetRotate(ROTATE_0);
+  paint.SetWidth(128);
+  paint.SetHeight(24);
+
+  /* For simplicity, the arguments are explicit numerical coordinates */
+  paint.Clear(COLORED);
+  paint.DrawStringAt(0, 4, "Hello world!", &Font16, UNCOLORED);
+  epd.SetFrameMemory(paint.GetImage(), 0, 10, paint.GetWidth(), paint.GetHeight());
+
+  paint.Clear(UNCOLORED);
+  paint.DrawStringAt(0, 4, "e-Paper Demo", &Font16, COLORED);
+  epd.SetFrameMemory(paint.GetImage(), 0, 30, 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.SetFrameMemory(paint.GetImage(), 16, 60, paint.GetWidth(), paint.GetHeight());
+
+  paint.Clear(UNCOLORED);
+  paint.DrawCircle(32, 32, 30, COLORED);
+  epd.SetFrameMemory(paint.GetImage(), 72, 60, paint.GetWidth(), paint.GetHeight());
+
+  paint.Clear(UNCOLORED);
+  paint.DrawFilledRectangle(0, 0, 40, 50, COLORED);
+  epd.SetFrameMemory(paint.GetImage(), 16, 130, paint.GetWidth(), paint.GetHeight());
+
+  paint.Clear(UNCOLORED);
+  paint.DrawFilledCircle(32, 32, 30, COLORED);
+  epd.SetFrameMemory(paint.GetImage(), 72, 130, paint.GetWidth(), paint.GetHeight());
+  epd.DisplayFrame();
+
+  Serial.println("Displayed demo text");
+  delay(2000);
+
+  if (epd.Init(lut_partial_update) != 0) {
+      Serial.print("e-Paper init failed");
+      return;
+  }
+
+  /** 
+   *  there are 2 memory areas embedded in the e-paper display
+   *  and once the display is refreshed, the memory area will be auto-toggled,
+   *  i.e. the next action of SetFrameMemory will set the other memory area
+   *  therefore you have to set the frame memory and refresh the display twice.
+   */
+  /**
+  epd.SetFrameMemory(IMAGE_DATA);
+  epd.DisplayFrame();
+  epd.SetFrameMemory(IMAGE_DATA);
+  epd.DisplayFrame();
+**/
+  time_start_ms = millis();
+}
+
+void loop() {
+  // put your main code here, to run repeatedly:
+  time_now_s = (millis() - time_start_ms) / 1000;
+  char time_string[] = {'0', '0', ':', '0', '0', '\0'};
+  time_string[0] = time_now_s / 60 / 10 + '0';
+  time_string[1] = time_now_s / 60 % 10 + '0';
+  time_string[3] = time_now_s % 60 / 10 + '0';
+  time_string[4] = time_now_s % 60 % 10 + '0';
+
+  paint.SetWidth(32);
+  paint.SetHeight(96);
+  paint.SetRotate(ROTATE_90);
+
+  paint.Clear(UNCOLORED);
+  paint.DrawStringAt(0, 4, time_string, &Font24, COLORED);
+  epd.SetFrameMemory(paint.GetImage(), 80, 72, paint.GetWidth(), paint.GetHeight());
+  epd.DisplayFrame();
+
+  Serial.print("Updated time to ");
+  Serial.println(time_string);
+  delay(500);
+}
+