262 lines
10 KiB
Python
262 lines
10 KiB
Python
"""
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液晶屏管理模块 - 单例模式实现
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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。
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适用于ESP8266等内存有限的平台。
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"""
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def _print_mem():
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import gc
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gc.collect(); print(f'LCD.mem: {gc.mem_free()}')
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class Display:
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"""液晶屏管理类 - 单例模式"""
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_instance = None
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_initialized = False
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def __new__(cls):
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"""单例模式实现"""
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if cls._instance is None:
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cls._instance = super(Display, cls).__new__(cls)
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return cls._instance
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def __init__(self):
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"""初始化液晶屏，只在第一次调用时执行"""
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if not self._initialized:
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self.tft = None
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self._backlight = None
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self._brightness = 80 # 默认亮度80%
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self._initialized = True
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self._pos_y0 = 10
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self.en_font = '/rom/fonts/en0.rfont'
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self.vector_font = '/rom/fonts/en.hfont'
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self.cn_font = '/rom/fonts/cn.bfont'
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self.time_font = '/rom/fonts/time.bfont'
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self.bootimg = '/rom/images/T0.jpg'
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# 前景色、背景色、提示框背景色
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self._COLORS = (0xFE19, 0x0000, 0x7800)
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self.ui_type = 'default'
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# ui数据
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self.ui_data = {}
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self.ticks = 0 # 据此切换多行显示
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def init_display(self, bl_pwm=False, buffer_size=2048):
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"""初始化液晶屏，默认2048够用且不易有内存碎片"""
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try:
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from machine import PWM, SPI, Pin
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from st7789 import ST7789
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# 初始化显示屏
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self.tft = ST7789(
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SPI(1, 40_000_000, polarity=1),
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240,
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240,
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dc=Pin(0, Pin.OUT),
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reset=Pin(2, Pin.OUT),
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buffer_size=buffer_size,
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)
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# 初始化PWM背光控制
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if bl_pwm:
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self._backlight = PWM(Pin(5), freq=1000)
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else:
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self._backlight = Pin(5, Pin.OUT)
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self.brightness(self._brightness)
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# 初始化并清屏
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self.tft.init()
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self.tft.fill(0)
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self.show_jpg(self.bootimg, 80, 80)
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self.message("WS2 v1.3.0 (20260201)")
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_print_mem()
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return True
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except Exception as e:
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print(f"LCD init failed: {e}")
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self.tft = None
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self._backlight = None
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return False
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def is_ready(self):
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"""检查液晶屏是否已初始化"""
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return self.tft is not None
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def clear(self, color=0):
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"""清屏"""
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self.tft.fill(color)
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self._pos_y0 = 10
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def show_jpg(self, filename, x=0, y=0, mode=1):
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"""显示JPG图片, 默认SLOW模式"""
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self.tft.jpg(filename, x, y, mode)
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def brightness(self, _brightness=-1):
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"""设置背光亮度 (0-100)"""
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if _brightness >= 0 and _brightness <= 100:
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from machine import PWM
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if type(self._backlight) == PWM: # pwm设备
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# 将0-100范围映射到0-1023 (PWM占空比)
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duty = int(1023 * (100 - _brightness) / 100)
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self._backlight.duty(duty)
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elif _brightness == 0: # 关闭背光
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self._backlight.on()
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else: # 打开背光
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self._backlight.off()
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_brightness = 100
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self._brightness = _brightness
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return self._brightness
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def message(self, msg, x=10, y=None, fg=0xFFFF, bg=0):
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if y == None:
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y = self._pos_y0
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self.tft.text(self.en_font, msg, x, y, fg, bg)
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# 每次打印完消息则滚动到下一行
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self._pos_y0 += 20
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if self._pos_y0 >= 240-20:
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self._pos_y0 = 10
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def window(self, title=None, content=None, info=None):
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C_FG,C_BG,C_BT = self._COLORS
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self.tft.fill(C_BG)
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self.tft.rect(8, 8, 224, 224, C_FG)
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self.tft.fill_rect(9, 9, 222, 40, C_BT)
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self.tft.hline(9, 48, 222, C_FG)
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self.tft.fill_rect(9, 192, 222, 39, C_BT)
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self.tft.hline(9, 192, 222, C_FG)
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if title:
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self.tft.write(self.cn_font, title, 19, 17, C_FG, C_BT)
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if info:
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self.tft.text(self.en_font, info, 19, 204, C_FG, C_BT)
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for i, line in enumerate(content):
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if line:
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self.tft.write(self.cn_font, line, 19, 68+i*28, C_FG, C_BG)
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def portal_info(self, msg):
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C_FG,C_BG,C_BT = self._COLORS
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self.tft.text(self.en_font, msg, 19, 204, C_FG, C_BT)
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def portal_win(self, ssid):
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tips = [
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"> 连接热点:",
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f"> {ssid}",
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"",
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"> 自动进入配置页面",
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]
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self.window("配置设备网络连接", tips, "portal ip: 192.168.4.1")
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# 更新ui数据
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def update_ui(self, city=None, weather=None, advice=None, aqi=None, lunar=None, ip=None, envdat=None):
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self.ticks += 1
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if self.ui_type == 'default':
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# 中文的城市名称
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if city is not None and city != self.ui_data.get('city'):
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self.ui_data['city'] = city
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if self.tft.write(self.cn_font, city, 15,10) == 0:
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# 城市可能未包括，则显示??
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self.tft.write(self.cn_font, '??', 15,10)
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# 天气符号: 0-7 (未知、晴、云、雨、雷、雪、雾、风)
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if weather is not None and weather != self.ui_data.get('weather'):
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self.show_jpg(f"/rom/images/{weather}.jpg",175,10)
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self.ui_data['weather'] = weather
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# 建议信息可能有很多条，需要轮换展示
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if advice is not None and advice != self.ui_data.get('advice'):
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if ip is not None: advice.append(ip)
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self.ui_data['advice'] = advice
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# AQI等级分成0-5级，分别对应优、良、中、差、污、恶
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if aqi is not None and aqi != self.ui_data.get('aqi'):
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_t = (('优',0x07E0),('良',0xFFE0),('中',0xFD20),('差',0xF800),('污',0x8010),('恶',0x7800))
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_l,_c = _t[aqi]
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self.tft.fill_rect(105, 8, 38, 25, _c)
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self.tft.write(self.cn_font, _l, 114,10, 0,_c)
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self.ui_data['aqi'] = aqi
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# 农历日期，需要和当前日期轮换展示
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if lunar is not None and lunar != self.ui_data.get('lunar'):
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self.ui_data['lunar'] = lunar
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# 环境数据
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if envdat is not None:
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t,rh = envdat.get('t'),envdat.get('rh')
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pm,ap = envdat.get('pm'),envdat.get('ap')
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co2 = envdat.get('co2')
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# 填充后再更新文本
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if t is not None and t != self.ui_data.get('t'):
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self.ui_data['t'] = t
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self.tft.fill_rect(35,179,40,16,0)
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self.tft.draw(self.vector_font, f"{str(t)}'C", 35,187,0xFFFF,0.5)
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if rh is not None and rh != self.ui_data.get('rh'):
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self.ui_data['rh'] = rh
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self.tft.fill_rect(110,179,40,16,0)
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self.tft.draw(self.vector_font, f' {str(rh)}%', 110,187,0xFFFF,0.5)
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if pm is not None and pm != self.ui_data.get('pm'):
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self.ui_data['pm'] = pm
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self.tft.fill_rect(35,213,40,16,0)
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self.tft.draw(self.vector_font, f'{str(pm):>4s}', 35,221,0xFFFF,0.5)
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if co2 is not None and co2 != self.ui_data.get('co2'):
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# 如果co2数据存在，优先显示co2
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if self.ui_data.get('ap'):
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self.ui_data['ap'] = None
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self.show_jpg("/rom/images/co2.jpg",85,209)
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self.ui_data['co2'] = co2
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self.tft.fill_rect(110,213,40,16,0)
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self.tft.draw(self.vector_font, f'{str(co2):>4s}', 110,221,0xFFFF,0.5)
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elif self.ui_data.get('co2') is None and ap is not None and ap != self.ui_data.get('ap'):
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# 没co2时候才会显示大气压
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self.ui_data['ap'] = ap
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self.tft.fill_rect(110,213,40,16,0)
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self.tft.draw(self.vector_font, f'{str(ap):>4s}', 110,221,0xFFFF,0.5)
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# 处理日期
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from machine import RTC
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y,m,d,_w,H,M,*_ = RTC().datetime()
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w = ('一','二','三','四','五','六','天')[_w]
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if m!=self.ui_data.get('month') or d!=self.ui_data.get('day'):
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self.ui_data['month'] = m
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self.ui_data['day'] = d
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self.ui_data['weekday'] = w
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# just stop lunar, wait refresh
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self.ui_data['lunar'] = None
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# 切换日期显示
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lunar = self.ui_data.get('lunar')
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if lunar is not None and self.ticks & 0x01:
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w = self.tft.write(self.cn_font, f'{lunar} 星期{w}', 15,135)
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else:
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w = self.tft.write(self.cn_font, f'{m:2d}月{d:2d}日 星期{w}', 15,135)
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if w<22*9: # fill
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self.tft.fill_rect(15+w,135,22*9-w,22,0)
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# 处理时间显示
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if H != self.ui_data.get('hour'):
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self.ui_data['hour'] = H
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self.tft.fill_rect(25,80,110,48,0)
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self.tft.write(self.time_font,f'{H:02d}:',25,80,0xF080)
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if M != self.ui_data.get('minute'):
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self.ui_data['minute'] = M
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self.tft.fill_rect(135,80,90,48,0)
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self.tft.write(self.time_font,f'{M:02d}',135,80,0xFF80)
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# 处理建议显示
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advice = self.ui_data.get('advice')
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if isinstance(advice, list) and advice:
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i = self.ticks % len(advice)
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c = advice[i]
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w = self.tft.write(self.cn_font, advice[i], 15,45)
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if w<22*7: # fill
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self.tft.fill_rect(15+w,45,22*7-w,22,0)
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# 打印内存信息
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_print_mem()
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# 初始化ui固定元素
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def load_ui(self, ui_type='default'):
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if ui_type == 'default':
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# 默认黑色背景
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self.tft.fill(0)
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# 固定的环境数据图标
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self.show_jpg("/rom/images/t.jpg",11,177)
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self.show_jpg("/rom/images/rh.jpg",85,177)
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self.show_jpg("/rom/images/pm.jpg",11,209)
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self.show_jpg("/rom/images/ap.jpg",85,209)
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# 更新其他默认数据
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self.update_ui()
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self.ui_type = ui_type
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# 全局液晶屏实例
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display = Display()
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