使用定时器调节屏幕亮度

main/display/display.cc

@@ -8,10 +8,15 @@
 #include "application.h"
 #include "font_awesome_symbols.h"
 #include "audio_codec.h"
+#include "settings.h"
 
 #define TAG "Display"
 
 Display::Display() {
+    // Load brightness from settings
+    Settings settings("display");
+    brightness_ = settings.GetInt("brightness", 100);
+
     // Notification timer
     esp_timer_create_args_t notification_timer_args = {
         .callback = [](void *arg) {
@@ -206,3 +211,9 @@ void Display::SetIcon(const char* icon) {
 
 void Display::SetChatMessage(const std::string &role, const std::string &content) {
 }
+
+void Display::SetBacklight(uint8_t brightness) {
+    Settings settings("display", true);
+    settings.SetInt("brightness", brightness);
+    brightness_ = brightness;
+}

main/display/display.h

@@ -23,14 +23,16 @@ public:
     virtual void SetEmotion(const std::string &emotion);
     virtual void SetChatMessage(const std::string &role, const std::string &content);
     virtual void SetIcon(const char* icon);
-    virtual void SetBacklight(uint8_t brightness) = 0;
+    virtual void SetBacklight(uint8_t brightness);
 
-    int width() const { return width_; }
-    int height() const { return height_; }
+    inline int width() const { return width_; }
+    inline int height() const { return height_; }
+    inline uint8_t brightness() const { return brightness_; }
 
 protected:
     int width_ = 0;
     int height_ = 0;
+    uint8_t brightness_ = 0;
 
     lv_display_t *display_ = nullptr;
 

main/display/lcd_display.cc

@@ -6,6 +6,8 @@
 #include <driver/ledc.h>
 #include <vector>
 #include <esp_lvgl_port.h>
+#include <esp_timer.h>
+
 #include "board.h"
 
 #define TAG "LcdDisplay"
@@ -13,7 +15,6 @@
 
 LV_FONT_DECLARE(font_awesome_30_4);
 
-
 LcdDisplay::LcdDisplay(esp_lcd_panel_io_handle_t panel_io, esp_lcd_panel_handle_t panel,
                            gpio_num_t backlight_pin, bool backlight_output_invert,
                            int width, int height, int offset_x, int offset_y, bool mirror_x, bool mirror_y, bool swap_xy,
@@ -23,6 +24,18 @@ LcdDisplay::LcdDisplay(esp_lcd_panel_io_handle_t panel_io, esp_lcd_panel_handle_
     width_ = width;
     height_ = height;
 
+    // 创建背光渐变定时器
+    const esp_timer_create_args_t timer_args = {
+        .callback = [](void* arg) {
+            LcdDisplay* display = static_cast<LcdDisplay*>(arg);
+            display->OnBacklightTimer();
+        },
+        .arg = this,
+        .dispatch_method = ESP_TIMER_TASK,
+        .name = "backlight_timer",
+        .skip_unhandled_events = true,
+    };
+    ESP_ERROR_CHECK(esp_timer_create(&timer_args, &backlight_timer_));
     InitializeBacklight(backlight_pin);
 
     // draw white
@@ -79,12 +92,16 @@ LcdDisplay::LcdDisplay(esp_lcd_panel_io_handle_t panel_io, esp_lcd_panel_handle_
         lv_display_set_offset(display_, offset_x, offset_y);
     }
 
-    SetBacklight(100);
-
     SetupUI();
+
+    SetBacklight(brightness_);
 }
 
 LcdDisplay::~LcdDisplay() {
+    if (backlight_timer_ != nullptr) {
+        esp_timer_stop(backlight_timer_);
+        esp_timer_delete(backlight_timer_);
+    }
     // 然后再清理 LVGL 对象
     if (content_ != nullptr) {
         lv_obj_del(content_);
@@ -132,7 +149,7 @@ void LcdDisplay::InitializeBacklight(gpio_num_t backlight_pin) {
         .speed_mode = LEDC_LOW_SPEED_MODE,
         .duty_resolution = LEDC_TIMER_10_BIT,
         .timer_num = LEDC_TIMER_0,
-        .freq_hz = 20000,//背光pwm频率需要高一点，防止电感啸叫
+        .freq_hz = 20000, //背光pwm频率需要高一点，防止电感啸叫
         .clk_cfg = LEDC_AUTO_CLK,
         .deconfigure = false
     };
@@ -141,6 +158,23 @@ void LcdDisplay::InitializeBacklight(gpio_num_t backlight_pin) {
     ESP_ERROR_CHECK(ledc_channel_config(&backlight_channel));
 }
 
+void LcdDisplay::OnBacklightTimer() {
+    if (current_brightness_ < brightness_) {
+        current_brightness_++;
+    } else if (current_brightness_ > brightness_) {
+        current_brightness_--;
+    }
+    
+    // LEDC resolution set to 10bits, thus: 100% = 1023
+    uint32_t duty_cycle = (1023 * current_brightness_) / 100;
+    ledc_set_duty(LEDC_LOW_SPEED_MODE, LCD_LEDC_CH, duty_cycle);
+    ledc_update_duty(LEDC_LOW_SPEED_MODE, LCD_LEDC_CH);
+    
+    if (current_brightness_ == brightness_) {
+        esp_timer_stop(backlight_timer_);
+    }
+}
+
 void LcdDisplay::SetBacklight(uint8_t brightness) {
     if (backlight_pin_ == GPIO_NUM_NC) {
         return;
@@ -151,10 +185,12 @@ void LcdDisplay::SetBacklight(uint8_t brightness) {
     }
 
     ESP_LOGI(TAG, "Setting LCD backlight: %d%%", brightness);
-    // LEDC resolution set to 10bits, thus: 100% = 1023
-    uint32_t duty_cycle = (1023 * brightness) / 100;
-    ESP_ERROR_CHECK(ledc_set_duty(LEDC_LOW_SPEED_MODE, LCD_LEDC_CH, duty_cycle));
-    ESP_ERROR_CHECK(ledc_update_duty(LEDC_LOW_SPEED_MODE, LCD_LEDC_CH));
+    // 停止现有的定时器（如果正在运行）
+    esp_timer_stop(backlight_timer_);
+
+    Display::SetBacklight(brightness);
+    // 启动定时器，每 5ms 更新一次
+    ESP_ERROR_CHECK(esp_timer_start_periodic(backlight_timer_, 5 * 1000));
 }
 
 bool LcdDisplay::Lock(int timeout_ms) {

main/display/lcd_display.h

@@ -30,6 +30,9 @@ protected:
 
     DisplayFonts fonts_;
 
+    esp_timer_handle_t backlight_timer_ = nullptr;
+    uint8_t current_brightness_ = 0;
+    void OnBacklightTimer();
     void InitializeBacklight(gpio_num_t backlight_pin);
 
     virtual void SetupUI();
@@ -43,10 +46,10 @@ public:
                   DisplayFonts fonts);
     ~LcdDisplay();
 
-    void SetChatMessage(const std::string &role, const std::string &content) override;
-    void SetEmotion(const std::string &emotion) override;
-    void SetIcon(const char* icon) override;
-    void SetBacklight(uint8_t brightness);
+    virtual void SetChatMessage(const std::string &role, const std::string &content) override;
+    virtual void SetEmotion(const std::string &emotion) override;
+    virtual void SetIcon(const char* icon) override;
+    virtual void SetBacklight(uint8_t brightness) override;
 };
 
 #endif // LCD_DISPLAY_H

main/display/no_display.h

@@ -7,9 +7,7 @@ class NoDisplay : public Display {
 private:
     virtual bool Lock(int timeout_ms = 0) override;
     virtual void Unlock() override;
-    virtual void SetBacklight(uint8_t brightness) override {
-        // 空实现，因为这是一个无显示设备
-    }
+
 public:
     NoDisplay();
     ~NoDisplay();