初始化提交

boards/default_src/micropython/origin/build/lib/ltr553als.py

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+"""
+LTR-553ALS-XX
+
+MicroPython library for the LTR-553ALS-XX(ALS,PS)
+=======================================================
+
+#Preliminary composition       			20220224
+#Format unified							20220623
+
+dahanzimin From the Mixly Team
+"""
+
+import time
+from micropython import const
+
+LTR_553ALS_ADDRESS					= const(0x23)
+LTR_ALS_REG_CONTR					= const(0x80)
+LTR_PS_REG_CONTR					= const(0x81)
+LTR_PS_REG_LED						= const(0x82)
+LTR_PS_REG_PULSES					= const(0x83)
+LTR_PS_REG_RATE						= const(0x84)
+LTR_ALS_REG_RATE					= const(0x85)
+LTR_553ALS_REG_ID					= const(0x87)
+LTR_ALS_REG_DATA1					= const(0x88)
+LTR_553ALS_REG_ATATUS				= const(0x8C)
+LTR_PS_REG_DATA1					= const(0x8D)
+
+_ALS_GAIN={
+	"X1":(1,0x01),		# For Gain X1
+	"X2":(2,0x05),		# For Gain X2
+	"X4":(4,0x09),		# For Gain X4
+	"X8":(8,0x0D),		# For Gain X8
+	"X48":(48,0x19),	# For Gain X48
+	"X96":(96,0x1D),	# For Gain X96
+}
+
+class LTR_553ALS:
+
+	def __init__(self, i2c_bus,addr=LTR_553ALS_ADDRESS,ALS_Gain="X1"):
+		self._device  =  i2c_bus
+		self._address = addr
+		self.ALS_IR   = 0
+		self.ALS_VIS  = 0
+		self.PS       = 0
+		self.ALS_gain = ALS_Gain
+		
+		if self._chip_id() != 0x05:
+			raise AttributeError("Cannot find a LTR_553ALS")
+			
+		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): 
+		'''校对设备ID'''	
+		return self._rreg(LTR_553ALS_REG_ID)
+		
+	def _configure(self):
+		'''配置寄存器'''
+		self._wreg(LTR_ALS_REG_CONTR,_ALS_GAIN[self.ALS_gain][1])	# ALS_CONTR: Active mode
+		self._wreg(LTR_PS_REG_CONTR,0x03)							# PS_CONTR:  Active mode
+		self._wreg(LTR_PS_REG_LED,0x5B)			#PS_LED: LED_pulse_period=50khz,DUTY = 100%,LED_pulsed_current_level = 50mA
+		self._wreg(LTR_PS_REG_PULSES,0x0A)		#PS_N_Pulses: Number_of_pulses = 10
+		self._wreg(LTR_PS_REG_RATE,0x08)		#PS_Measurement_Rate=10ms
+		self._wreg(LTR_ALS_REG_RATE,0x12)		#ALS_Measurement_Rate=200ms,ALS_integration_time=200ms
+	
+	def _status(self):
+		'''数据转换状态'''
+		status=self._rreg(LTR_553ALS_REG_ATATUS)
+		return status&0x84, status&0x01				#ALS,PS status
+
+	@property	
+	def getdata(self):
+		'''处理获取数据'''
+		if self._status()[0]:
+			data_als=self._rreg(LTR_ALS_REG_DATA1,4)
+			als_ch1=data_als[0] | data_als[1]<<8
+			als_ch0=data_als[2] | data_als[3]<<8
+			ratio=als_ch1/(als_ch1+als_ch0) if (als_ch1+als_ch0)>0 else 0
+			self.ALS_IR =als_ch1*ratio/_ALS_GAIN[self.ALS_gain][0]
+			self.ALS_VIS=als_ch0*ratio/_ALS_GAIN[self.ALS_gain][0]
+			
+		if self._status()[1]:
+			data_ps=self._rreg(LTR_PS_REG_DATA1,2)
+			self.PS =data_ps[0] | data_ps[1]<<8
+			
+		return round(self.ALS_VIS,2),round(self.ALS_IR,2),self.PS
+		
+	def als_vis(self):	
+		'''可见光Lux'''
+		return self.getdata[0]
+		
+	def als_ir(self):	
+		'''红外Lux'''
+		return self.getdata[1]		
+		
+	def ps_nl(self):	
+		'''接近距离'''
+		return self.getdata[2]