#!/usr/bin/python # Author: Joe Gutting # With use of Adafruit SI1145 library for Arduino, Adafruit_GPIO.I2C & BMP Library by Tony DiCola # # Permission is hereby granted, free of charge, to any person obtaining a copy # of this software and associated documentation files (the "Software"), to deal # in the Software without restriction, including without limitation the rights # to use, copy, modify, merge, publish, distribute, sublicense, and/or sell # copies of the Software, and to permit persons to whom the Software is # furnished to do so, subject to the following conditions: # # The above copyright notice and this permission notice shall be included in # all copies or substantial portions of the Software. # # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE # AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN # THE SOFTWARE. import logging import time import Adafruit_GPIO.I2C as I2C # COMMANDS SI1145_PARAM_QUERY = 0x80 SI1145_PARAM_SET = 0xA0 SI1145_NOP = 0x0 SI1145_RESET = 0x01 SI1145_BUSADDR = 0x02 SI1145_PS_FORCE = 0x05 SI1145_ALS_FORCE = 0x06 SI1145_PSALS_FORCE = 0x07 SI1145_PS_PAUSE = 0x09 SI1145_ALS_PAUSE = 0x0A SI1145_PSALS_PAUSE = 0xB SI1145_PS_AUTO = 0x0D SI1145_ALS_AUTO = 0x0E SI1145_PSALS_AUTO = 0x0F SI1145_GET_CAL = 0x12 # Parameters SI1145_PARAM_I2CADDR = 0x00 SI1145_PARAM_CHLIST = 0x01 SI1145_PARAM_CHLIST_ENUV = 0x80 SI1145_PARAM_CHLIST_ENAUX = 0x40 SI1145_PARAM_CHLIST_ENALSIR = 0x20 SI1145_PARAM_CHLIST_ENALSVIS = 0x10 SI1145_PARAM_CHLIST_ENPS1 = 0x01 SI1145_PARAM_CHLIST_ENPS2 = 0x02 SI1145_PARAM_CHLIST_ENPS3 = 0x04 SI1145_PARAM_PSLED12SEL = 0x02 SI1145_PARAM_PSLED12SEL_PS2NONE = 0x00 SI1145_PARAM_PSLED12SEL_PS2LED1 = 0x10 SI1145_PARAM_PSLED12SEL_PS2LED2 = 0x20 SI1145_PARAM_PSLED12SEL_PS2LED3 = 0x40 SI1145_PARAM_PSLED12SEL_PS1NONE = 0x00 SI1145_PARAM_PSLED12SEL_PS1LED1 = 0x01 SI1145_PARAM_PSLED12SEL_PS1LED2 = 0x02 SI1145_PARAM_PSLED12SEL_PS1LED3 = 0x04 SI1145_PARAM_PSLED3SEL = 0x03 SI1145_PARAM_PSENCODE = 0x05 SI1145_PARAM_ALSENCODE = 0x06 SI1145_PARAM_PS1ADCMUX = 0x07 SI1145_PARAM_PS2ADCMUX = 0x08 SI1145_PARAM_PS3ADCMUX = 0x09 SI1145_PARAM_PSADCOUNTER = 0x0A SI1145_PARAM_PSADCGAIN = 0x0B SI1145_PARAM_PSADCMISC = 0x0C SI1145_PARAM_PSADCMISC_RANGE = 0x20 SI1145_PARAM_PSADCMISC_PSMODE = 0x04 SI1145_PARAM_ALSIRADCMUX = 0x0E SI1145_PARAM_AUXADCMUX = 0x0F SI1145_PARAM_ALSVISADCOUNTER = 0x10 SI1145_PARAM_ALSVISADCGAIN = 0x11 SI1145_PARAM_ALSVISADCMISC = 0x12 SI1145_PARAM_ALSVISADCMISC_VISRANGE = 0x20 SI1145_PARAM_ALSIRADCOUNTER = 0x1D SI1145_PARAM_ALSIRADCGAIN = 0x1E SI1145_PARAM_ALSIRADCMISC = 0x1F SI1145_PARAM_ALSIRADCMISC_RANGE = 0x20 SI1145_PARAM_ADCCOUNTER_511CLK = 0x70 SI1145_PARAM_ADCMUX_SMALLIR = 0x00 SI1145_PARAM_ADCMUX_LARGEIR = 0x03 # REGISTERS SI1145_REG_PARTID = 0x00 SI1145_REG_REVID = 0x01 SI1145_REG_SEQID = 0x02 SI1145_REG_INTCFG = 0x03 SI1145_REG_INTCFG_INTOE = 0x01 SI1145_REG_INTCFG_INTMODE = 0x02 SI1145_REG_IRQEN = 0x04 SI1145_REG_IRQEN_ALSEVERYSAMPLE = 0x01 SI1145_REG_IRQEN_PS1EVERYSAMPLE = 0x04 SI1145_REG_IRQEN_PS2EVERYSAMPLE = 0x08 SI1145_REG_IRQEN_PS3EVERYSAMPLE = 0x10 SI1145_REG_IRQMODE1 = 0x05 SI1145_REG_IRQMODE2 = 0x06 SI1145_REG_HWKEY = 0x07 SI1145_REG_MEASRATE0 = 0x08 SI1145_REG_MEASRATE1 = 0x09 SI1145_REG_PSRATE = 0x0A SI1145_REG_PSLED21 = 0x0F SI1145_REG_PSLED3 = 0x10 SI1145_REG_UCOEFF0 = 0x13 SI1145_REG_UCOEFF1 = 0x14 SI1145_REG_UCOEFF2 = 0x15 SI1145_REG_UCOEFF3 = 0x16 SI1145_REG_PARAMWR = 0x17 SI1145_REG_COMMAND = 0x18 SI1145_REG_RESPONSE = 0x20 SI1145_REG_IRQSTAT = 0x21 SI1145_REG_IRQSTAT_ALS = 0x01 SI1145_REG_ALSVISDATA0 = 0x22 SI1145_REG_ALSVISDATA1 = 0x23 SI1145_REG_ALSIRDATA0 = 0x24 SI1145_REG_ALSIRDATA1 = 0x25 SI1145_REG_PS1DATA0 = 0x26 SI1145_REG_PS1DATA1 = 0x27 SI1145_REG_PS2DATA0 = 0x28 SI1145_REG_PS2DATA1 = 0x29 SI1145_REG_PS3DATA0 = 0x2A SI1145_REG_PS3DATA1 = 0x2B SI1145_REG_UVINDEX0 = 0x2C SI1145_REG_UVINDEX1 = 0x2D SI1145_REG_PARAMRD = 0x2E SI1145_REG_CHIPSTAT = 0x30 # I2C Address SI1145_ADDR = 0x60 class SI1145(object): def __init__(self, address=SI1145_ADDR, busnum=I2C.get_default_bus()): self._logger = logging.getLogger('SI1145') # Create I2C device. self._device = I2C.Device(address, busnum) #reset device self._reset() # Load calibration values. self._load_calibration() # device reset def _reset(self): self._device.write8(SI1145_REG_MEASRATE0, 0) self._device.write8(SI1145_REG_MEASRATE1, 0) self._device.write8(SI1145_REG_IRQEN, 0) self._device.write8(SI1145_REG_IRQMODE1, 0) self._device.write8(SI1145_REG_IRQMODE2, 0) self._device.write8(SI1145_REG_INTCFG, 0) self._device.write8(SI1145_REG_IRQSTAT, 0xFF) self._device.write8(SI1145_REG_COMMAND, SI1145_RESET) time.sleep(.01) self._device.write8(SI1145_REG_HWKEY, 0x17) time.sleep(.01) # write Param def writeParam(self, p, v): self._device.write8(SI1145_REG_PARAMWR, v) self._device.write8(SI1145_REG_COMMAND, p | SI1145_PARAM_SET) paramVal = self._device.readU8(SI1145_REG_PARAMRD) return paramVal # load calibration to sensor def _load_calibration(self): # /***********************************/ # Enable UVindex measurement coefficients! self._device.write8(SI1145_REG_UCOEFF0, 0x29) self._device.write8(SI1145_REG_UCOEFF1, 0x89) self._device.write8(SI1145_REG_UCOEFF2, 0x02) self._device.write8(SI1145_REG_UCOEFF3, 0x00) # Enable UV sensor self.writeParam(SI1145_PARAM_CHLIST, SI1145_PARAM_CHLIST_ENUV | SI1145_PARAM_CHLIST_ENALSIR | SI1145_PARAM_CHLIST_ENALSVIS | SI1145_PARAM_CHLIST_ENPS1) # Enable interrupt on every sample self._device.write8(SI1145_REG_INTCFG, SI1145_REG_INTCFG_INTOE) self._device.write8(SI1145_REG_IRQEN, SI1145_REG_IRQEN_ALSEVERYSAMPLE) # /****************************** Prox Sense 1 */ # Program LED current self._device.write8(SI1145_REG_PSLED21, 0x03) # 20mA for LED 1 only self.writeParam(SI1145_PARAM_PS1ADCMUX, SI1145_PARAM_ADCMUX_LARGEIR) # Prox sensor #1 uses LED #1 self.writeParam(SI1145_PARAM_PSLED12SEL, SI1145_PARAM_PSLED12SEL_PS1LED1) # Fastest clocks, clock div 1 self.writeParam(SI1145_PARAM_PSADCGAIN, 0) # Take 511 clocks to measure self.writeParam(SI1145_PARAM_PSADCOUNTER, SI1145_PARAM_ADCCOUNTER_511CLK) # in prox mode, high range self.writeParam(SI1145_PARAM_PSADCMISC, SI1145_PARAM_PSADCMISC_RANGE | SI1145_PARAM_PSADCMISC_PSMODE) self.writeParam(SI1145_PARAM_ALSIRADCMUX, SI1145_PARAM_ADCMUX_SMALLIR) # Fastest clocks, clock div 1 self.writeParam(SI1145_PARAM_ALSIRADCGAIN, 0) # Take 511 clocks to measure self.writeParam(SI1145_PARAM_ALSIRADCOUNTER, SI1145_PARAM_ADCCOUNTER_511CLK) # in high range mode self.writeParam(SI1145_PARAM_ALSIRADCMISC, SI1145_PARAM_ALSIRADCMISC_RANGE) # fastest clocks, clock div 1 self.writeParam(SI1145_PARAM_ALSVISADCGAIN, 0) # Take 511 clocks to measure self.writeParam(SI1145_PARAM_ALSVISADCOUNTER, SI1145_PARAM_ADCCOUNTER_511CLK) # in high range mode (not normal signal) self.writeParam(SI1145_PARAM_ALSVISADCMISC, SI1145_PARAM_ALSVISADCMISC_VISRANGE) # measurement rate for auto self._device.write8(SI1145_REG_MEASRATE0, 0xFF) # 255 * 31.25uS = 8ms # auto run self._device.write8(SI1145_REG_COMMAND, SI1145_PSALS_AUTO) # returns the UV index * 100 (divide by 100 to get the index) def readUV(self): return self._device.readU16LE(0x2C) #returns visible + IR light levels def readVisible(self): return self._device.readU16LE(0x22) #returns IR light levels def readIR(self): return self._device.readU16LE(0x24) # Returns "Proximity" - assumes an IR LED is attached to LED def readProx(self): return self._device.readU16LE(0x26)