New feature: show boot clock during boot.

src/display.cpp

@@ -66,11 +66,70 @@ void Display::begin(void) {
   //addLogMessage("Display initialized");
 }
 
+#define BOOT_CLOCK_WIDTH 16
+#define BOOT_CLOCK_PIXEL_WIDTH 2
+#define BOOT_CLOCK_PIXELS_PER_SIDE (BOOT_CLOCK_WIDTH / BOOT_CLOCK_PIXEL_WIDTH - 1)
+#define BOOT_CLOCK_PIXELS (BOOT_CLOCK_PIXELS_PER_SIDE * 4)
+#define BOOT_CLOCK_FORWARD_AFTER_ms 200
+// Example: WIDTH=16, PIXEL_WIDTH = 4 --> 3 pixels per side (4 seen, but one would be counted double)
+// Result: Pixels a / b / c / d
+//      a1 a2 a3 b1
+//      d3       b2
+//      d2       b3
+//      d1 c3 c2 c1
+//
+void Display::showBootClock(void) {
+  static unsigned long lastClockUpdate_ts = 0;
+  static int tick = 0;
+
+  if (millis() - lastClockUpdate_ts >= BOOT_CLOCK_FORWARD_AFTER_ms) {
+    ++tick;
+    if (tick >= BOOT_CLOCK_PIXELS) {
+      tick = 0;
+      /*
+      u8g2.setDrawColor(0);
+      u8g2.drawBox(u8g2.getDisplayWidth()-BOOT_CLOCK_WIDTH, 0, BOOT_CLOCK_WIDTH, BOOT_CLOCK_WIDTH);
+      u8g2.setDrawColor(1);
+      */
+    }
+  }
+  u8g2.setDrawColor(2); // XOR
+  // draw appropriate pixels
+  int x=0, y=0, side, pixelOnSide; // side = 0, 1, 2, 3 for a, b, c, d
+
+  side = tick / BOOT_CLOCK_PIXELS_PER_SIDE;
+  pixelOnSide = tick % BOOT_CLOCK_PIXELS_PER_SIDE;
+  switch (side) {
+    case 0: // top
+      x = u8g2.getDisplayWidth() - BOOT_CLOCK_WIDTH + pixelOnSide * BOOT_CLOCK_PIXEL_WIDTH;
+      y = 0;
+      break;
+    case 1: // right
+      x = u8g2.getDisplayWidth() - BOOT_CLOCK_PIXEL_WIDTH;
+      y = pixelOnSide * BOOT_CLOCK_PIXEL_WIDTH;
+      break;
+    case 2: // bottom
+      x = u8g2.getDisplayWidth() - (1 + pixelOnSide) * BOOT_CLOCK_PIXEL_WIDTH;
+      y = BOOT_CLOCK_WIDTH - BOOT_CLOCK_PIXEL_WIDTH;
+      break;
+    case 3: // left
+      x = u8g2.getDisplayWidth() - BOOT_CLOCK_WIDTH;
+      y = BOOT_CLOCK_WIDTH - (1 + pixelOnSide) * BOOT_CLOCK_PIXEL_WIDTH;
+  }
+  u8g2.drawBox(x, y, BOOT_CLOCK_PIXEL_WIDTH, BOOT_CLOCK_PIXEL_WIDTH);
+  u8g2.setDrawColor(1);
+  u8g2.drawCircle(u8g2.getDisplayWidth()-BOOT_CLOCK_WIDTH/2, BOOT_CLOCK_WIDTH/2, BOOT_CLOCK_PIXEL_WIDTH, U8G2_DRAW_ALL);
+  u8g2.setDrawColor(1);
+  u8g2.sendBuffer();
+
+}
+
 bool Display::showBootSequenceFinished(unsigned int ms_per_step) {
   static int step = 0;
   static unsigned long lastStep_ms = 0;
 
   if (step > 4) return true; // all is done; the value "4" corresponds to the number of steps in following case statement!
+  showBootClock();
   if (ms_per_step > millis() - lastStep_ms) return false; // do nothing, if last step execution is not long enough ago
   Serial.print("showBootSequence: step="); Serial.println(step);
   lastStep_ms = millis();
@@ -80,20 +139,12 @@ bool Display::showBootSequenceFinished(unsigned int ms_per_step) {
       currentScreen = BootSequenceScreen;
       break;
     case 1:
-      u8g2.drawPixel(100, 10);
-      u8g2.drawPixel(102, 12);
-      u8g2.drawPixel(104, 14);
-      u8g2.drawPixel(106, 16);
-      u8g2.sendBuffer();
       break;
     case 2:
-      u8g2.drawLine(100, u8g2.getDisplayHeight()-1, u8g2.getDisplayWidth()-1, u8g2.getDisplayHeight()/2);
-      u8g2.drawCircle(u8g2.getDisplayWidth()-20, u8g2.getDisplayHeight()-10, 10, U8G2_DRAW_UPPER_LEFT | U8G2_DRAW_LOWER_RIGHT);
-      u8g2.sendBuffer();
       break;
     case 3:
-      u8g2.drawXBMP(60, 0, 16, 16, logo16_glcd_bmp);
-      u8g2.sendBuffer();
+      //u8g2.drawXBMP(60, 0, 16, 16, logo16_glcd_bmp);
+      //u8g2.sendBuffer();
       break;
     case 4:
       break; // empty step to be sure, that last step is displayed long enough

src/display.h

@@ -58,5 +58,6 @@ private:
   int getTextCharsPerLine(void);
   void setNormalTextSize(void);
   void setLargeTextSize(void);
+  void showBootClock(void);
 };
 #endif

src/main.cpp

@@ -247,7 +247,7 @@ void checkForPowerOffRequest() {
 
 void loop(void)
 {
-  if (!display.showBootSequenceFinished(1000)) {
+  if (!display.showBootSequenceFinished(4000)) {
     return;
   }