init
This commit is contained in:
264
SI1145.py
Normal file
264
SI1145.py
Normal file
@@ -0,0 +1,264 @@
|
|||||||
|
#!/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)
|
||||||
|
|
||||||
Reference in New Issue
Block a user