Fix up LCD init / charset

Marlin/src/Marlin.cpp

 
   #if ENABLED(SHOW_BOOTSCREEN)
     lcd_bootscreen();
-    #if DISABLED(DOGLCD) && ENABLED(ULTRA_LCD) && DISABLED(SDSUPPORT)
-        lcd_init();
-    #endif
   #endif
 
   #if ENABLED(MIXING_EXTRUDER) && MIXING_VIRTUAL_TOOLS > 1

Marlin/src/lcd/ultralcd.cpp

       lcd_implementation_clear();
       // Re-initialize custom characters that may be re-used
       #if DISABLED(DOGLCD) && ENABLED(AUTO_BED_LEVELING_UBL)
-        if (!ubl.lcd_map_control) lcd_set_custom_characters(
-          #if ENABLED(LCD_PROGRESS_BAR)
-            screen == lcd_status_screen
-          #endif
-        );
+        if (!ubl.lcd_map_control) {
+          lcd_set_custom_characters(
+            #if ENABLED(LCD_PROGRESS_BAR)
+              screen == lcd_status_screen ? CHARSET_INFO : CHARSET_MENU
+            #endif
+          );
+        }
       #elif ENABLED(LCD_PROGRESS_BAR)
-        lcd_set_custom_characters(screen == lcd_status_screen);
+        lcd_set_custom_characters(screen == lcd_status_screen ? CHARSET_INFO : CHARSET_MENU);
       #endif
       lcdDrawUpdate = LCDVIEW_CALL_REDRAW_NEXT;
       screen_changed = true;
       #endif
       lcd_implementation_init( // to maybe revive the LCD if static electricity killed it.
         #if ENABLED(LCD_PROGRESS_BAR)
-          false
+          CHARSET_MENU
         #endif
       );
       lcd_goto_screen(lcd_main_menu);
       static int8_t bar_percent = 0;
       if (lcd_clicked) {
         lcd_goto_previous_menu();
-        lcd_set_custom_characters(false);
+        lcd_set_custom_characters(CHARSET_MENU);
         return;
       }
       bar_percent += (int8_t)encoderPosition;
 
 void lcd_init() {
 
-  lcd_implementation_init(
-    #if ENABLED(LCD_PROGRESS_BAR)
-      true
-    #endif
-  );
+  lcd_implementation_init();
 
   #if ENABLED(NEWPANEL)
 
       lcdDrawUpdate = LCDVIEW_CLEAR_CALL_REDRAW;
       lcd_implementation_init( // to maybe revive the LCD if static electricity killed it.
         #if ENABLED(LCD_PROGRESS_BAR)
-          currentScreen == lcd_status_screen
+          currentScreen == lcd_status_screen ? CHARSET_INFO : CHARSET_MENU
         #endif
       );
     }

Marlin/src/lcd/ultralcd_impl_HD44780.h

   lcd.createChar(c, temp);
 }
 
+#define CHARSET_MENU 0
+#define CHARSET_INFO 1
+#define CHARSET_BOOT 2
+
 static void lcd_set_custom_characters(
-  #if ENABLED(LCD_PROGRESS_BAR)
-    const bool info_screen_charset = true
+  #if ENABLED(LCD_PROGRESS_BAR) || ENABLED(SHOW_BOOTSCREEN)
+    const uint8_t screen_charset=CHARSET_INFO
   #endif
 ) {
+  // CHARSET_BOOT
+  #if ENABLED(SHOW_BOOTSCREEN)
+    const static PROGMEM byte corner[4][8] = { {
+      B00000,
+      B00000,
+      B00000,
+      B00000,
+      B00001,
+      B00010,
+      B00100,
+      B00100
+    }, {
+      B00000,
+      B00000,
+      B00000,
+      B11100,
+      B11100,
+      B01100,
+      B00100,
+      B00100
+    }, {
+      B00100,
+      B00010,
+      B00001,
+      B00000,
+      B00000,
+      B00000,
+      B00000,
+      B00000
+    }, {
+      B00100,
+      B01000,
+      B10000,
+      B00000,
+      B00000,
+      B00000,
+      B00000,
+      B00000
+    } };
+  #endif // SHOW_BOOTSCREEN
+
+  // CHARSET_INFO
   const static PROGMEM byte bedTemp[8] = {
     B00000,
     B11111,
   };
 
   #if ENABLED(SDSUPPORT)
+
+    // CHARSET_MENU
     const static PROGMEM byte refresh[8] = {
       B00000,
       B00110,
     };
 
     #if ENABLED(LCD_PROGRESS_BAR)
+
+      // CHARSET_INFO
       const static PROGMEM byte progress[3][8] = { {
         B00000,
         B10000,
         B10101,
         B00000
       } };
-    #endif
-  #endif
 
-  createChar_P(LCD_BEDTEMP_CHAR, bedTemp);
-  createChar_P(LCD_DEGREE_CHAR, degree);
-  createChar_P(LCD_STR_THERMOMETER[0], thermometer);
-  createChar_P(LCD_FEEDRATE_CHAR, feedrate);
-  createChar_P(LCD_CLOCK_CHAR, clock);
+    #endif // LCD_PROGRESS_BAR
 
-  #if ENABLED(SDSUPPORT)
-    #if ENABLED(LCD_PROGRESS_BAR)
-      static bool char_mode = false;
-      if (info_screen_charset != char_mode) {
-        char_mode = info_screen_charset;
-        if (info_screen_charset) { // Progress bar characters for info screen
-          for (int16_t i = 3; i--;) createChar_P(LCD_STR_PROGRESS[i], progress[i]);
-        }
-        else { // Custom characters for submenus
-          createChar_P(LCD_UPLEVEL_CHAR, uplevel);
-          createChar_P(LCD_STR_REFRESH[0], refresh);
-          createChar_P(LCD_STR_FOLDER[0], folder);
-        }
-      }
-    #else
-      createChar_P(LCD_UPLEVEL_CHAR, uplevel);
-      createChar_P(LCD_STR_REFRESH[0], refresh);
-      createChar_P(LCD_STR_FOLDER[0], folder);
-    #endif
+  #endif // SDSUPPORT
 
+  #if ENABLED(SHOW_BOOTSCREEN) || ENABLED(LCD_PROGRESS_BAR)
+    static uint8_t char_mode = 0;
+    #define CHAR_COND (screen_charset != char_mode)
   #else
-    createChar_P(LCD_UPLEVEL_CHAR, uplevel);
+    #define CHAR_COND true
   #endif
+
+  if (CHAR_COND) {
+    #if ENABLED(SHOW_BOOTSCREEN) || ENABLED(LCD_PROGRESS_BAR)
+      char_mode = screen_charset;
+      #if ENABLED(SHOW_BOOTSCREEN)
+        // Set boot screen corner characters
+        if (screen_charset == CHARSET_BOOT) {
+          for (uint8_t i = 4; i--;)
+            createChar_P(i, corner[i]);
+        }
+        else
+      #endif
+    #endif
+        { // Info Screen uses 5 special characters
+          createChar_P(LCD_BEDTEMP_CHAR, bedTemp);
+          createChar_P(LCD_DEGREE_CHAR, degree);
+          createChar_P(LCD_STR_THERMOMETER[0], thermometer);
+          createChar_P(LCD_FEEDRATE_CHAR, feedrate);
+          createChar_P(LCD_CLOCK_CHAR, clock);
+
+          #if ENABLED(SDSUPPORT)
+            #if ENABLED(LCD_PROGRESS_BAR)
+              if (screen_charset == CHARSET_INFO) { // 3 Progress bar characters for info screen
+                for (int16_t i = 3; i--;)
+                  createChar_P(LCD_STR_PROGRESS[i], progress[i]);
+              }
+              else
+            #endif
+              { // SD Card sub-menu special characters
+                createChar_P(LCD_UPLEVEL_CHAR, uplevel);
+                createChar_P(LCD_STR_REFRESH[0], refresh);
+                createChar_P(LCD_STR_FOLDER[0], folder);
+              }
+          #else
+            // With no SD support, only need the uplevel character
+            createChar_P(LCD_UPLEVEL_CHAR, uplevel);
+          #endif
+        }
+  }
 }
 
 static void lcd_implementation_init(
   #if ENABLED(LCD_PROGRESS_BAR)
-    const bool info_screen_charset = true
+    const uint8_t screen_charset=CHARSET_INFO
   #endif
 ) {
 
 
   lcd_set_custom_characters(
     #if ENABLED(LCD_PROGRESS_BAR)
-      info_screen_charset
+      screen_charset
     #endif
   );