初始化提交

boards/default_src/micropython/origin/build/lib/ht16k33.py

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+"""
+HT16K33-framebuf
+
+Micropython	library for the HT16K33 Matrix16x8
+=======================================================
+
+#Preliminary composition					20230411
+
+@dahanzimin From the Mixly Team
+"""
+import uframebuf
+from micropython import const
+
+_HT16K33_BLINK_CMD 			= const(0x80)
+_HT16K33_BLINK_DISPLAYON 	= const(0x01)
+_HT16K33_CMD_BRIGHTNESS 	= const(0xE0)
+_HT16K33_OSCILATOR_ON 		= const(0x21)
+
+class HT16K33(uframebuf.FrameBuffer_Ascall):
+	def __init__(self, i2c, address=0x70, brightness=0.3, width=16, height=8):
+		self._i2c = i2c
+		self._address = address	
+		self._blink_rate=0
+		self._brightness=brightness
+		self._buffer = bytearray((width + 7) // 8 * height)	
+		super().__init__(self._buffer, width, height, uframebuf.MONO_HMSB)
+		self._write_cmd(_HT16K33_OSCILATOR_ON)
+		self.blink_rate(0)
+		self.set_brightness(brightness)
+		self.fill(0)
+		self.show()
+		
+	def _write_cmd(self, val):
+		'''I2C write command'''
+		self._i2c.writeto(self._address,val.to_bytes(1, 'little'))
+
+	def blink_rate(self, rate=None):
+		if rate is None:
+			return self._blink_rate
+		if not 0 <= rate <= 3:
+			raise ValueError("Blink rate must be an integer in the range: 0-3")
+		rate = rate & 0x03
+		self._blink_rate = rate
+		self._write_cmd(_HT16K33_BLINK_CMD | _HT16K33_BLINK_DISPLAYON | rate << 1)
+			
+	def get_brightness(self):
+		return self._brightness
+
+	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 & 0x0F
+		self._write_cmd(_HT16K33_CMD_BRIGHTNESS | xbright)
+
+	def show(self):
+		"""Refresh the display and show the changes."""
+		self._i2c.writeto_mem(self._address, 0x00, self._buffer)