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