Briefly show splash, add more epd modes, add feed for wdt so it doesnt miss ping and dc

Author: brentru

src/components/display/drivers/dispDrvBase.h

@@ -125,6 +125,15 @@ class dispDrvBase {
   */
   virtual void setTextSize(uint8_t s) { _text_sz = s; }
 
+
+  /*!
+      @brief  Displays a splash screen on the display.
+      @note   This method can be overridden by derived classes to provide
+              specific functionality.
+  */
+  virtual void showSplash() { // No-op for base class 
+  }
+
 protected:
   int16_t _pin_dc;      ///< Data/Command pin
   int16_t _pin_rst;     ///< Reset pin

src/components/display/drivers/dispDrvThinkInkGrayscale4Eaamfgn.h

@@ -73,10 +73,20 @@ class drvDispThinkInkGrayscale4Eaamfgn : public dispDrvBase {
     _height = _display->height();
     _width = _display->width();
     _display->clearBuffer();
+    return true;
+  }
+
+ virtual void showSplash() override {
+    if (_display == nullptr)
+      return;
+
     // Show splash screen
     _display->drawBitmap(0, 0, epd_bitmap_ws_logo_296128, 296, 128, EPD_BLACK);
     _display->display();
-    return true;
+    delay(1000);
+    _display->clearBuffer();
+    _display->fillScreen(EPD_WHITE);
+    _display->display();
   }
 
   /*!

src/components/display/hardware.cpp

@@ -240,7 +240,13 @@ bool DisplayHardware::beginEPD(
   thinkinkmode_t epd_mode = THINKINK_MONO;
   if (config->mode == wippersnapper_display_v1_EPDMode_EPD_MODE_GRAYSCALE4) {
     epd_mode = THINKINK_GRAYSCALE4;
-    WS_DEBUG_PRINTLN("[display] EPD mode: GRAYSCALE4");
+  } else if (config->mode == wippersnapper_display_v1_EPDMode_EPD_MODE_MONO) {
+    epd_mode = THINKINK_MONO;
+  } else {
+    WS_DEBUG_PRINTLN("[display] ERROR: Unsupported EPD mode!");
+    delete _drvDisp;
+    _drvDisp = nullptr;
+    return false;
   }
 
   if (!_drvDisp->begin(epd_mode)) {
@@ -250,6 +256,10 @@ bool DisplayHardware::beginEPD(
     return false;
   }
 
+  WS.feedWDT();
+  _drvDisp->showSplash();
+  WS.feedWDT();
+  WS_DEBUG_PRINTLN("[display] Successfully initialized epd display!");
   return true;
 }
 
@@ -328,7 +338,6 @@ bool DisplayHardware::beginTft(
   _drvDisp->setHeight(config->height);
   _drvDisp->setRotation(config->rotation);
   _drvDisp->begin();
-  _drvDisp->setTextSize(text_sz);
 
   return true;
 }