Add display backlight brightness control

src/gui/MItem_menus.cpp

@@ -25,6 +25,7 @@
 #include <option/has_leds.h>
 #if HAS_LEDS()
     #include "led_animations/animator.hpp"
+    #include "gui_leds.hpp"
 #endif
 #include "img_resources.hpp"
 #include "power_panic.hpp"
@@ -535,6 +536,24 @@ void MI_LEDS_ENABLE::OnChange(size_t old_index) {
     }
 }
 
+    #if HAS_LEDS()
+/**********************************************************************************************/
+// MI_DISPLAY_BACKLIGHT_BRIGHTNESS
+static constexpr NumericInputConfig led_display_backlight_brightness_spin_config = {
+    // Keep a min value of 20 percent to make sure the user can still see the lcd content if changed by mistake
+    .min_value = 20,
+    .max_value = 100,
+};
+
+MI_DISPLAY_BACKLIGHT_BRIGHTNESS::MI_DISPLAY_BACKLIGHT_BRIGHTNESS()
+    : WiSpin(config_store().leds_display_backlight_brightness.get(), led_display_backlight_brightness_spin_config, _(label), nullptr, is_enabled_t::yes, is_hidden_t::no) {
+}
+void MI_DISPLAY_BACKLIGHT_BRIGHTNESS::OnClick() {
+    leds::display_backlight_brightness(GetVal());
+    leds::store_display_backlight_brightness(GetVal());
+}
+    #endif
+
 // MI_SIDE_LEDS_DIMMING_DURATION
 static constexpr NumericInputConfig side_led_dimming_spin_config = {
     .max_value = 60 * 60, // 60 Minutes

src/gui/MItem_menus.hpp

@@ -413,6 +413,16 @@ class MI_LEDS_ENABLE : public WI_ICON_SWITCH_OFF_ON_t {
 };
 #endif
 
+#if HAS_LEDS()
+class MI_DISPLAY_BACKLIGHT_BRIGHTNESS : public WiSpin {
+    static constexpr const char *const label = N_("Display Backlight Brightness");
+
+public:
+    MI_DISPLAY_BACKLIGHT_BRIGHTNESS();
+    virtual void OnClick() override;
+};
+#endif
+
 #if HAS_SIDE_LEDS()
 class MI_SIDE_LEDS_ENABLE : public WI_ICON_SWITCH_OFF_ON_t {
     static constexpr const char *const label = N_("RGB Side Strip");

src/gui/screen_menu_user_interface.hpp

@@ -30,7 +30,8 @@ using ScreenMenuUserInterface__ = ScreenMenu<GuiDefaults::MenuFooter, MI_RETURN,
 #endif
 #if HAS_LEDS()
     ,
-    MI_LEDS_ENABLE
+    MI_LEDS_ENABLE,
+    MI_DISPLAY_BACKLIGHT_BRIGHTNESS
 #endif
 #if HAS_SIDE_LEDS()
     ,

src/guiapi/include/gui_leds.hpp

@@ -45,11 +45,25 @@ void TickLoop();
 void SetNth(Color clr, index n);
 
 /**
- * @brief Set the Brightness of display
+ * @brief Set the Brightness of display backlight
  *
  * @param percent Brightness in range 0 - 100
  */
-void SetBrightness(unsigned percent);
+void display_backlight_brightness(unsigned percent);
+
+/**
+ * @brief Read the Brightness of the display backlight from ConfigStore
+ *
+ * @return percent Brightness in range 20 - 100
+ */
+uint8_t get_display_backlight_brightness();
+
+/**
+ * @brief Store the Brightness of the display backlight to ConfigStore
+ *
+ * @param percent Brightness in range 20 - 100
+ */
+void store_display_backlight_brightness(uint8_t percent);
 
 /**
  * @brief Forces write on next call of tick loop

src/guiapi/src/gui_leds.cpp

@@ -28,8 +28,8 @@ Neopixels &getNeopixels() {
 
 void leds::Init() {
     // Turn on LCD backlight
-    // TODO move SetBrightness to display
-    leds::SetBrightness(100);
+    // TODO move display_backlight_brightness to display
+    leds::display_backlight_brightness(leds::get_display_backlight_brightness());
     leds::TickLoop();
 
 #if HAS_SIDE_LEDS()
@@ -42,6 +42,15 @@ void leds::ForceRefresh(size_t cnt) {
     getNeopixels().ForceRefresh(cnt);
 }
 
+uint8_t leds::get_display_backlight_brightness() {
+    return config_store().leds_display_backlight_brightness.get();
+}
+
+void leds::store_display_backlight_brightness(uint8_t percent) {
+    leds::display_backlight_brightness(percent);
+    return config_store().leds_display_backlight_brightness.set(percent);
+}
+
 void leds::TickLoop() {
     getNeopixels().Tick();
 
@@ -63,7 +72,7 @@ void leds::SetNth(Color clr, leds::index n) {
 // backlight is on WS2811 (RGB)
 // but color structure is meant for WS2812 (GRB)
 // so to set RED channel on WS2811 have to set GREEN
-void leds::SetBrightness(unsigned percent) {
+void leds::display_backlight_brightness(unsigned percent) {
     percent = std::min(100u, percent);
     percent *= 255;
     percent /= 100;

src/persistent_stores/store_instances/config_store/store_definition.hpp

@@ -332,6 +332,8 @@ struct CurrentStore
     StoreItem<bool, true, journal::hash("Enable Side LEDs dimming")> side_leds_dimming_enabled;
     StoreItem<int, 120, journal::hash("Side LEDs dimming duration")> side_leds_dimming_duration;
 
+    StoreItem<uint8_t, 100, journal::hash("Display backlight brightness")> leds_display_backlight_brightness;
+
     StoreItem<bool, true, journal::hash("Enable Tool LEDs")> tool_leds_enabled;
     StoreItem<uint8_t, 100, journal::hash("Tool LED brightness")> tool_leds_brightness;