启动时候显示

src/rom/app.py

@@ -9,6 +9,7 @@ import time
 import machine
 import uasyncio
 from config import config
+from display import display  # 导入液晶屏管理模块
 from wifi_manager import wifi_manager
 
 # 全局变量存储最新的天气数据
@@ -107,6 +108,7 @@ async def weather_update_task():
     interval_ms = interval_minutes * 60 * 1000  # 转换为毫秒
 
     print(f"开始定时更新天气数据，间隔{interval_minutes}分钟")
+    await uasyncio.sleep_ms(1 * 1000)
 
     while True:
         try:
@@ -127,31 +129,17 @@ async def weather_update_task():
 # 精简的动画显示任务
 async def animation_task():
     """显示JPG动画的后台任务"""
+    # 检查液晶屏是否已初始化
+    if not display.is_ready():
+        print("液晶屏未初始化，跳过动画任务")
+        return
+
     try:
-        import st7789
-        from machine import SPI, Pin
-
-        # 初始化显示屏
-        tft = st7789.ST7789(
-            SPI(1, 40_000_000, polarity=1),
-            240,
-            240,
-            dc=Pin(0, Pin.OUT),
-            reset=Pin(2, Pin.OUT),
-            backlight=Pin(5, Pin.OUT),
-            buffer_size=0,
-        )
-
-        # 初始化并清屏
-        tft.init()
-        gc.collect()
-        tft.fill(st7789.BLACK)
-        tft.off()
-
         # 动画参数
         frame_count = 20
         frame_delay = 10  # 帧延迟(毫秒)
 
+        await uasyncio.sleep_ms(2 * 1000)
         print(f"开始JPG动画，帧延迟: {frame_delay}ms")
 
         frame = 0
@@ -161,8 +149,8 @@ async def animation_task():
                 current_frame = (frame % frame_count) + 1
                 filename = f"/rom/www/images/T{current_frame}.jpg"
 
-                # 显示当前帧
+                # 显示当前帧，右下角
-                tft.jpg(filename, 160, 160, st7789.FAST)
+                display.show_jpg(filename, 160, 160)
 
                 # 控制帧率
                 await uasyncio.sleep_ms(frame_delay)
@@ -185,13 +173,18 @@ async def animation_task():
 
 
 def start():
-    # init lcd screen
+    # 初始化液晶屏
+    display.init_display()
+    display.show_jpg("/rom/www/images/T1.jpg", 80, 80)
+    gc.collect()
+
     if not wifi_manager.connect():
         print("Failed to connect to WiFi, starting CaptivePortal for configuration")
         from captive_portal import CaptivePortal
 
         portal = CaptivePortal()
         return portal.start()
+    gc.collect()
 
     # init web server
     from rom.nanoweb import Nanoweb

src/rom/display.py

@@ -0,0 +1,92 @@
+"""
+液晶屏管理模块 - 单例模式实现
+
+提供液晶屏的统一初始化和管理接口，确保整个系统中只有一个液晶屏实例。
+适用于ESP8266等内存有限的平台。
+"""
+
+import gc
+
+import st7789
+
+
+class Display:
+    """液晶屏管理类 - 单例模式"""
+
+    _instance = None
+    _initialized = False
+
+    def __new__(cls):
+        """单例模式实现"""
+        if cls._instance is None:
+            cls._instance = super(Display, cls).__new__(cls)
+        return cls._instance
+
+    def __init__(self):
+        """初始化液晶屏，只在第一次调用时执行"""
+        if not self._initialized:
+            self.tft = None
+            self._backlight = None
+            self._brightness = 50  # 默认亮度50%
+            self._initialized = True
+
+    def init_display(self):
+        """初始化液晶屏"""
+        try:
+            from machine import PWM, SPI, Pin
+
+            # 初始化显示屏
+            self.tft = st7789.ST7789(
+                SPI(1, 40_000_000, polarity=1),
+                240,
+                240,
+                dc=Pin(0, Pin.OUT),
+                reset=Pin(2, Pin.OUT),
+                buffer_size=0,
+            )
+
+            # 初始化PWM背光控制
+            self._backlight = PWM(Pin(5), freq=1000)
+            self.brightness(self._brightness)
+
+            # 初始化并清屏
+            self.tft.init()
+            gc.collect()
+            self.tft.fill(st7789.BLACK)
+            print("液晶屏初始化成功")
+            return True
+
+        except Exception as e:
+            print(f"液晶屏初始化失败: {e}")
+            self.tft = None
+            self._backlight = None
+            return False
+
+    def is_ready(self):
+        """检查液晶屏是否已初始化"""
+        return self.tft is not None
+
+    def driver(self):
+        """获取液晶屏对象"""
+        return self.tft
+
+    def clear(self, color=st7789.BLACK):
+        """清屏"""
+        self.tft.fill(color)
+
+    def show_jpg(self, filename, x=0, y=0, mode=st7789.FAST):
+        """显示JPG图片"""
+        self.tft.jpg(filename, x, y, mode)
+
+    def brightness(self, _brightness=-1):
+        """设置背光亮度 (0-100)"""
+        if _brightness >= 0 and _brightness <= 100:
+            # 将0-100范围映射到0-1023 (PWM占空比)
+            duty = int(1023 * _brightness / 100)
+            self._backlight.duty(duty)
+            self._brightness = _brightness
+        return self._brightness
+
+
+# 全局液晶屏实例
+display = Display()