初始化提交

boards/default/micropython/build/lib/tm1652.py

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+"""
+TM1652-framebuf
+
+Micropython	library for the TM1652 Matrix8x5
+=======================================================
+
+#Preliminary composition	  	    20230126
+
+@dahanzimin From the Mixly Team
+"""
+import time
+import uframebuf
+from machine import Pin
+from micropython import const
+
+_TM1652_REG_ADD	     = const(0x08)		#Display address command
+_TM1652_REG_CMD	     = const(0x18)		#Display control command
+_TM1652_SET_CUR	     = const(0x04)      #LED current setting 3/8 
+
+class TM1652(uframebuf.FrameBuffer_Ascall):
+	def __init__(self, pin, brightness=0.3, width=8, height=5):
+		self.pin=Pin(pin,Pin.OUT)
+		self.pin.value(1)	
+		self._buffer = bytearray((width + 7) // 8 * height)	
+		super().__init__(self._buffer, width, height, uframebuf.MONO_HMSB)	
+		self.brightness = brightness
+		self._brightness = None
+		self.set_brightness(brightness)
+		time.sleep_ms(5)
+		self.fill(0)
+		self.show()
+
+	def _write_cmd(self, val):
+		'''Serial write command'''
+		falg=0
+		#Start bit
+		self.pin.value(1)
+		time.sleep_us(15)
+		self.pin.value(0)		
+		time.sleep_us(30)
+		#Data bits	
+		for i in range(8):		
+			if (val >> i) & 0x01:
+				self.pin.value(1)
+				falg+=1
+			else:
+				self.pin.value(0)
+				falg+=0
+			time.sleep_us(44)
+		#Check bit
+		self.pin.value(1) if  falg%2 == 0 else self.pin.value(0)
+		time.sleep_us(50)
+		#Stop bit
+		self.pin.value(1)			
+		time.sleep_us(15)
+
+	def get_brightness(self):
+		return round(self.brightness,2)
+
+	def set_brightness(self, brightness):
+		if not 0.0 <= brightness <= 1.0:
+			raise ValueError("Brightness must be a decimal number in the range: 0.0~1.0")
+		self.brightness = brightness
+		xbright = round(15 * brightness) 
+		xbright = ((xbright & 0xA) >>1) | ((xbright & 0x5) <<1)
+		xbright = ((xbright & 0xC) >>2) | ((xbright & 0x3) <<2)
+		self._brightness = (xbright << 4) | _TM1652_SET_CUR		#高四位倒序|驱动电流
+
+	def show(self):
+		"""Refresh the display and show the changes."""
+		for _ in range(2):
+			self._write_cmd(_TM1652_REG_ADD)
+			for i in range(5):
+				self._write_cmd(self._buffer[i])
+			time.sleep_ms(3)
+			self._write_cmd(_TM1652_REG_CMD)
+			self._write_cmd(self._brightness)
+			time.sleep_ms(3)