🐛 E3V2 Brightness followup (#22821)

Co-authored-by: Scott Lahteine <github@thinkyhead.com>

Marlin/src/gcode/lcd/M250.cpp

  */
 void GcodeSuite::M250() {
   if (parser.seenval('C'))
-    ui.set_contrast(parser.value_int());
+    ui.set_contrast(parser.value_byte());
   else
     M250_report();
 }

Marlin/src/inc/Conditionals_LCD.h

   #define HAS_DWIN_E3V2 1
 #endif
 
+// E3V2 extras
+#if HAS_DWIN_E3V2 || IS_DWIN_MARLINUI
+  #define SERIAL_CATCHALL 0
+  #ifndef LCD_SERIAL_PORT
+    #if MB(BTT_SKR_MINI_E3_V1_0, BTT_SKR_MINI_E3_V1_2, BTT_SKR_MINI_E3_V2_0, BTT_SKR_E3_TURBO)
+      #define LCD_SERIAL_PORT 1
+    #else
+      #define LCD_SERIAL_PORT 3 // Creality 4.x board
+    #endif
+  #endif
+  #define HAS_LCD_BRIGHTNESS 1
+  #define LCD_BRIGHTNESS_MAX 250
+#endif
+
 #if IS_ULTRA_LCD
   #define HAS_WIRED_LCD 1
   #if ENABLED(DOGLCD)
   #define HAS_ETHERNET 1
 #endif
 
-#if EITHER(HAS_DWIN_E3V2, IS_DWIN_MARLINUI)
-  #define SERIAL_CATCHALL 0
-  #ifndef LCD_SERIAL_PORT
-    #if MB(BTT_SKR_MINI_E3_V1_0, BTT_SKR_MINI_E3_V1_2, BTT_SKR_MINI_E3_V2_0, BTT_SKR_E3_TURBO)
-      #define LCD_SERIAL_PORT 1
-    #else
-      #define LCD_SERIAL_PORT 3 // Creality 4.x board
-    #endif
-  #endif
-#endif
-
 // Fallback Stepper Driver types that don't depend on Configuration_adv.h
 #ifndef X_DRIVER_TYPE
   #define X_DRIVER_TYPE  A4988

Marlin/src/inc/Conditionals_post.h

   #endif
 #endif
 
-#if EITHER(HAS_DWIN_E3V2, IS_DWIN_MARLINUI)
-  #define HAS_LCD_BRIGHTNESS 1
-  #define MAX_LCD_BRIGHTNESS 31
-#endif
-
 /**
  * Override the SD_DETECT_STATE set in Configuration_adv.h
  * and enable sharing of onboard SD host drives (all platforms but AGCM4)

Marlin/src/lcd/TFTGLCD/marlinui_TFTGLCD.cpp

   lcd.clear_buffer();
 }
 
-int16_t MarlinUI::contrast; // Initialized by settings.load()
-
-void MarlinUI::set_contrast(const int16_t value) {
-  contrast = constrain(value, LCD_CONTRAST_MIN, LCD_CONTRAST_MAX);
-  lcd.setContrast(contrast);
-}
+#if HAS_LCD_CONTRAST
+  void MarlinUI::_set_contrast() { lcd.setContrast(contrast); }
+#endif
 
 static void center_text_P(PGM_P pstart, uint8_t y) {
   uint8_t len = utf8_strlen_P(pstart);

Marlin/src/lcd/dogm/marlinui_DOGM.cpp

 #endif
 
 #if HAS_LCD_CONTRAST
-
-  int16_t MarlinUI::contrast = DEFAULT_LCD_CONTRAST;
-
-  void MarlinUI::set_contrast(const int16_t value) {
-    contrast = constrain(value, LCD_CONTRAST_MIN, LCD_CONTRAST_MAX);
-    u8g.setContrast(contrast);
-  }
-
+  void MarlinUI::_set_contrast() { u8g.setContrast(contrast); }
 #endif
 
 void MarlinUI::set_font(const MarlinFont font_nr) {

Marlin/src/lcd/e3v2/common/dwin_api.cpp

         && databuf[3] == 'K' );
 }
 
-// Set the backlight brightness
-//  brightness: (0x00-0x1F)
-void DWIN_LCD_Brightness(const uint8_t brightness) {
-  size_t i = 0;
-  DWIN_Byte(i, 0x30);
-  DWIN_Byte(i, _MAX(brightness, 0x1F));
-  DWIN_Send(i);
-}
+#if HAS_LCD_BRIGHTNESS
+  // Set LCD backlight (from DWIN Enhanced)
+  //  brightness: 0x00-0xFF
+  void DWIN_LCD_Brightness(const uint8_t brightness) {
+    size_t i = 0;
+    DWIN_Byte(i, 0x30);
+    DWIN_Byte(i, brightness);
+    DWIN_Send(i);
+  }
+#endif
 
 // Set screen display direction
 //  dir: 0=0°, 1=90°, 2=180°, 3=270°

Marlin/src/lcd/e3v2/common/dwin_api.h

 // DWIN startup
 void DWIN_Startup();
 
-// Set the backlight brightness
-//  brightness: (0x00-0xFF)
-void DWIN_LCD_Brightness(const uint8_t brightness);
+#if HAS_LCD_BRIGHTNESS
+  // Set the backlight brightness
+  //  brightness: (0x00-0xFF)
+  void DWIN_LCD_Brightness(const uint8_t brightness);
+#endif
 
 // Set screen display direction
 //  dir: 0=0°, 1=90°, 2=180°, 3=270°

Marlin/src/lcd/e3v2/creality/dwin.cpp

 
 void MarlinUI::refresh() { /* Nothing to see here */ }
 
+#if HAS_LCD_BRIGHTNESS
+  void MarlinUI::_set_brightness() { DWIN_LCD_Brightness(backlight ? brightness : 0); }
+#endif
+
 #if ENABLED(SCROLL_LONG_FILENAMES)
 
   char shift_name[LONG_FILENAME_LENGTH + 1];

Marlin/src/lcd/e3v2/enhanced/dwin.cpp

 
 void MarlinUI::refresh() { /* Nothing to see here */ }
 
+#if HAS_LCD_BRIGHTNESS
+  void MarlinUI::_set_brightness() { DWIN_LCD_Brightness(backlight ? brightness : 0); }
+#endif
+
 #define ICON_Folder ICON_More
 
 #if ENABLED(SCROLL_LONG_FILENAMES)
 #endif
 
 #if HAS_LCD_BRIGHTNESS
-  void ApplyBrightness() { ui.set_brightness(HMI_value.Value); }
-  void LiveBrightness() { DWIN_LCD_Brightness(HMI_value.Value); }
-  void SetBrightness() { SetIntOnClick(MIN_LCD_BRIGHTNESS, MAX_LCD_BRIGHTNESS, ui.brightness, ApplyBrightness, LiveBrightness); }
+  void LiveBrightness() { ui.set_brightness(HMI_value.Value); }
+  void SetBrightness() { SetIntOnClick(LCD_BRIGHTNESS_MIN, LCD_BRIGHTNESS_MAX, ui.brightness, nullptr, LiveBrightness); }
 #endif
 
 #if ENABLED(SOUND_MENU_ITEM)

Marlin/src/lcd/e3v2/jyersui/dwin.cpp

             Draw_Float(ui.brightness, row, false, 1);
           }
           else
-            Modify_Value(ui.brightness, MIN_LCD_BRIGHTNESS, MAX_LCD_BRIGHTNESS, 1, ui.refresh_brightness);
+            Modify_Value(ui.brightness, LCD_BRIGHTNESS_MIN, LCD_BRIGHTNESS_MAX, 1, ui.refresh_brightness);
           break;
         case VISUAL_TIME_FORMAT:
           if (draw) {
             Draw_Float(ui.brightness, row, false, 1);
           }
           else
-            Modify_Value(ui.brightness, MIN_LCD_BRIGHTNESS, MAX_LCD_BRIGHTNESS, 1, ui.refresh_brightness);
+            Modify_Value(ui.brightness, LCD_BRIGHTNESS_MIN, LCD_BRIGHTNESS_MAX, 1, ui.refresh_brightness);
           break;
       }
       break;
 
 void MarlinUI::update() { CrealityDWIN.Update(); }
 
+#if HAS_LCD_BRIGHTNESS
+  void MarlinUI::_set_brightness() { DWIN_LCD_Brightness(backlight ? brightness : 0); }
+#endif
+
 void CrealityDWINClass::State_Update() {
   if ((print_job_timer.isRunning() || print_job_timer.isPaused()) != printing) {
     if (!printing) Start_Print(card.isFileOpen() || TERN0(POWER_LOSS_RECOVERY, recovery.valid()));

Marlin/src/lcd/e3v2/marlinui/ui_common.cpp

   #endif
 }
 
+#if HAS_LCD_BRIGHTNESS
+  void MarlinUI::_set_brightness() { DWIN_LCD_Brightness(backlight ? brightness : 0); }
+#endif
+
 #if HAS_LCD_MENU
 
   #include "../../menu/menu.h"

Marlin/src/lcd/marlinui.cpp

   }
 #endif
 
+#if HAS_LCD_CONTRAST
+  uint8_t MarlinUI::contrast; // Initialized by settings.load()
+
+  void MarlinUI::set_contrast(const uint8_t value) {
+    contrast = constrain(value, LCD_CONTRAST_MIN, LCD_CONTRAST_MAX);
+    _set_contrast();
+  }
+#endif
+
 #if HAS_LCD_BRIGHTNESS
   uint8_t MarlinUI::brightness = DEFAULT_LCD_BRIGHTNESS;
   bool MarlinUI::backlight = true;
 
   void MarlinUI::set_brightness(const uint8_t value) {
     backlight = !!value;
-    if (backlight) brightness = constrain(value, MIN_LCD_BRIGHTNESS, MAX_LCD_BRIGHTNESS);
-    // Set brightness on enabled LCD here
-    TERN_(DWIN_CREALITY_LCD_ENHANCED, DWIN_LCD_Brightness(brightness));
-    TERN_(DWIN_CREALITY_LCD_JYERSUI, DWIN_LCD_Brightness(backlight ? brightness : 0));
+    if (backlight) brightness = constrain(value, LCD_BRIGHTNESS_MIN, LCD_BRIGHTNESS_MAX);
+    _set_brightness();
   }
 #endif
 

Marlin/src/lcd/marlinui.h

   #endif
 
   #if HAS_LCD_BRIGHTNESS
-    #ifndef MIN_LCD_BRIGHTNESS
-      #define MIN_LCD_BRIGHTNESS   1
+    #ifndef LCD_BRIGHTNESS_MIN
+      #define LCD_BRIGHTNESS_MIN   1
     #endif
-    #ifndef MAX_LCD_BRIGHTNESS
-      #define MAX_LCD_BRIGHTNESS 255
+    #ifndef LCD_BRIGHTNESS_MAX
+      #define LCD_BRIGHTNESS_MAX 255
     #endif
     #ifndef DEFAULT_LCD_BRIGHTNESS
-      #define DEFAULT_LCD_BRIGHTNESS MAX_LCD_BRIGHTNESS
+      #define DEFAULT_LCD_BRIGHTNESS LCD_BRIGHTNESS_MAX
     #endif
     static uint8_t brightness;
     static bool backlight;
+    static void _set_brightness(); // Implementation-specific
     static void set_brightness(const uint8_t value);
     FORCE_INLINE static void refresh_brightness() { set_brightness(brightness); }
   #endif
       static uint8_t lcd_status_update_delay;
 
       #if HAS_LCD_CONTRAST
-        static int16_t contrast;
-        static void set_contrast(const int16_t value);
+        static uint8_t contrast;
+        static void _set_contrast(); // Implementation-specific
+        static void set_contrast(const uint8_t value);
         FORCE_INLINE static void refresh_contrast() { set_contrast(contrast); }
       #endif
 

Marlin/src/lcd/menu/menu_configuration.cpp

     #endif
   #endif
 
+  #if HAS_LCD_BRIGHTNESS
+    EDIT_ITEM_FAST(uint8, MSG_BRIGHTNESS, &ui.brightness, LCD_BRIGHTNESS_MIN, LCD_BRIGHTNESS_MAX, ui.refresh_brightness, true);
+  #endif
   #if HAS_LCD_CONTRAST
-    EDIT_ITEM(int3, MSG_CONTRAST, &ui.contrast, LCD_CONTRAST_MIN, LCD_CONTRAST_MAX, ui.refresh_contrast, true);
+    EDIT_ITEM_FAST(uint8, MSG_CONTRAST, &ui.contrast, LCD_CONTRAST_MIN, LCD_CONTRAST_MAX, ui.refresh_contrast, true);
   #endif
   #if ENABLED(FWRETRACT)
     SUBMENU(MSG_RETRACT, menu_config_retract);

Marlin/src/module/settings.cpp

   //
   // HAS_LCD_CONTRAST
   //
-  int16_t lcd_contrast;                                 // M250 C
+  uint8_t lcd_contrast;                                 // M250 C
 
   //
   // HAS_LCD_BRIGHTNESS
     //
     {
       _FIELD_TEST(lcd_contrast);
-      const int16_t lcd_contrast = TERN(HAS_LCD_CONTRAST, ui.contrast, 127);
+      const uint8_t lcd_contrast = TERN(HAS_LCD_CONTRAST, ui.contrast, 127);
       EEPROM_WRITE(lcd_contrast);
     }
 
       //
       {
         _FIELD_TEST(lcd_contrast);
-        int16_t lcd_contrast;
+        uint8_t lcd_contrast;
         EEPROM_READ(lcd_contrast);
         if (!validating) {
           TERN_(HAS_LCD_CONTRAST, ui.set_contrast(lcd_contrast));

buildroot/tests/STM32F103RET6_creality

 exec_test $1 $2 "Ender 3 v2 with JyersUI" "$3"
 
 use_example_configs "Creality/Ender-3 V2/MarlinUI"
-opt_add SDCARD_EEPROM_EMULATION NOZZLE_AS_PROBE AUTO_BED_LEVELING_BILINEAR Z_SAFE_HOMING
+opt_add SDCARD_EEPROM_EMULATION AUTO_BED_LEVELING_BILINEAR Z_SAFE_HOMING
 exec_test $1 $2 "Ender 3 v2 with MarlinUI" "$3"
 
 restore_configs