初始化提交

boards/default_src/micropython/origin/build/lib/ltr381rgb.py

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+"""
+LTR-381RGB-XX
+
+MicroPython library for the LTR-381RGB-XX (Color sensor)
+=======================================================
+
+#Preliminary composition       			20230417
+
+@dahanzimin From the Mixly Team
+"""
+import time
+from micropython import const
+
+LTR_MAIN_CTRL			= const(0x00)
+LTR_ALS_CS_MEAS_RATE	= const(0x04)
+LTR_ALS_CS_GAIN			= const(0x05)
+LTR_PART_ID				= const(0x06)
+LTR_MAIN_STATUS			= const(0x07)
+LTR_CS_DATA				= const(0x0A)
+		   #1x 3x 6x 9x 18x
+_GAINS_X = (1, 3, 6, 9, 18)
+
+class LTR_381RGB:
+	def __init__(self, i2c_bus, addr=0x53, gain=1):
+		self._device  =  i2c_bus
+		self._address = addr
+		self._gain = gain
+		self._color = [0, 0, 0]
+		self._ir = 0
+		self._als = 0
+
+		if (self._chip_id() & 0xF0) != 0xC0:
+			raise AttributeError("Cannot find a LTR-381RGB")
+		
+		self._configure()
+		time.sleep(0.1)
+	
+	def _wreg(self, reg, val):
+		'''Write memory address'''
+		self._device.writeto_mem(self._address,reg,val.to_bytes(1, 'little'))
+	
+	def _rreg(self, reg, nbytes=1):
+		'''Read memory address'''
+		return  self._device.readfrom_mem(self._address, reg, nbytes)[0] if nbytes<=1 else self._device.readfrom_mem(self._address, reg, nbytes)[0:nbytes]
+
+	def _chip_id(self): 
+		'''Proofreading device ID'''	
+		return self._rreg(LTR_PART_ID)
+		
+	def _configure(self):
+		'''Configuration Register'''
+		self._wreg(LTR_MAIN_CTRL, 0x06)					#CS mode & ALS/CS Enable
+		self._wreg(LTR_ALS_CS_MEAS_RATE, 0x22)			#Resolution = 18 bit, Meas Rate =100ms
+		self._wreg(LTR_ALS_CS_GAIN,	self._gain & 0x07)	#CS measurement Gain Range
+	
+	def status(self):
+		'''Data conversion status'''
+		return self._rreg(LTR_MAIN_STATUS) & 0x08
+
+	def getdata(self):
+		'''Processing data acquisition'''
+		if self.status():
+			_buf=self._rreg(LTR_CS_DATA, 12)
+			self._ir = _buf[2] << 16 | _buf[1] << 8 | _buf[0]
+			self._color [1] = _buf[5] << 16 | _buf[4] << 8 | _buf[3]
+			self._color [0] = _buf[8] << 16 | _buf[7] << 8 | _buf[6]
+			self._color [2] = _buf[11] << 16 | _buf[10] << 8 | _buf[9]
+			self._als = 0.8 * self._color [1] * (1 - 0.033 * self._ir / self._color [1]) / _GAINS_X[self._gain]
+		return round(self._als, 2), self._ir, self._color 
+
+	def color(self):	
+		return self.getdata[2]
+
+	def ir(self):	
+		return self.getdata[1]
+
+	def als(self):	
+		return self.getdata[0]