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Adafruit_AMG88xx.py
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Adafruit_AMG88xx.py
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# The MIT License (MIT)
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#
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# Copyright (c) 2017 Dean Miller for Adafruit Industries.
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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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"""
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`Adafruit_AMG88xx` - AMG88xx GRID-Eye IR 8x8 IR sensor
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====================================================
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This library supports the use of the AMG88xx in CircuitPython. This base
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class is inherited by the chip-specific subclasses.
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Functions are included for reading and writing registers and manipulating
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datetime objects.
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Author(s): Dean Miller for Adafruit Industries.
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Date: June 2017
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Affiliation: Adafruit Industries
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Implementation Notes
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--------------------
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**Hardware:**
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*
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**Software and Dependencies:**
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* Adafruit CircuitPython firmware for the ESP8622 and M0-based boards: https://github.com/adafruit/micropython/releases
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* Adafruit's Register library: https://github.com/adafruit/Adafruit_CircuitPython_Register
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* Adafruit's Bus Device library: https://github.com/adafruit/Adafruit_CircuitPython_BusDevice
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**Notes:**
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#. Datasheet:
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"""
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from adafruit_bus_device.i2c_device import I2CDevice
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from adafruit_register import i2c_bit
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from adafruit_register import i2c_bits
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from adafruit_register import i2c_bcd_alarm
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from adafruit_register import i2c_bcd_datetime
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"""
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# AMG88xx default address.
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AMG88xx_I2CADDR = 0x69
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AMG88xx_PCTL = 0x00
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AMG88xx_RST = 0x01
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AMG88xx_FPSC = 0x02
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AMG88xx_INTC = 0x03
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AMG88xx_STAT = 0x04
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AMG88xx_SCLR = 0x05
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#0x06 reserved
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AMG88xx_AVE = 0x07
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AMG88xx_INTHL = 0x08
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AMG88xx_INTHH = 0x09
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AMG88xx_INTLL = 0x0A
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AMG88xx_INTLH = 0x0B
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AMG88xx_IHYSL = 0x0C
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AMG88xx_IHYSH = 0x0D
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AMG88xx_TTHL = 0x0E
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AMG88xx_TTHH = 0x0F
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# Operating Modes
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AMG88xx_NORMAL_MODE = 0x00
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AMG88xx_SLEEP_MODE = 0x01
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AMG88xx_STAND_BY_60 = 0x20
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AMG88xx_STAND_BY_10 = 0x21
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#sw resets
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AMG88xx_FLAG_RESET = 0x30
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AMG88xx_INITIAL_RESET = 0x3F
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#frame rates
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AMG88xx_FPS_10 = 0x00
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AMG88xx_FPS_1 = 0x01
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#int enables
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AMG88xx_INT_DISABLED = 0x00
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AMG88xx_INT_ENABLED = 0x01
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#int modes
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AMG88xx_DIFFERENCE = 0x00
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AMG88xx_ABSOLUTE_VALUE = 0x01
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"""
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AMG88xx_INT_OFFSET = 0x010
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AMG88xx_PIXEL_OFFSET = 0x80
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AMG88xx_PIXEL_ARRAY_SIZE = 64
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AMG88xx_PIXEL_TEMP_CONVERSION = .25
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AMG88xx_THERMISTOR_CONVERSION = .0625
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class Adafruit_AMG88xx:
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"""Interface to the PCF8523 RTC."""
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#lost_power = i2c_bit.RWBit(0x03, 7)
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"""True if the device has lost power since the time was set."""
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#set up the registers
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_pctl = i2c_bits.RWBits(8, 0x00, 0)
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_rst = i2c_bits.RWBits(8, 0x01, 0)
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_fps = i2c_bit.RWBit(0x02, 0)
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_inten = i2c_bit.RWBit(0x03, 0)
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_intmod = i2c_bit.RWBit(0x03, 1)
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_intf = i2c_bit.RWBit(0x04, 1)
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_ovf_irs = i2c_bit.RWBit(0x04, 2)
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_ovf_ths = i2c_bit.RWBit(0x04, 3)
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_intclr = i2c_bit.RWBit(0x05, 1)
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_ovs_clr = i2c_bit.RWBit(0x05, 2)
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_ovt_clr = i2c_bit.RWBit(0x05, 3)
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_mamod = i2c_bit.RWBit(0x07, 5)
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"""
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_inthl = i2c_bits.RWBits(8, 0x08, 0)
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_inthh = i2c_bits.RWBits(4, 0x09, 0)
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_intll = i2c_bits.RWBits(8, 0x0A, 0)
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_intlh = i2c_bits.RWBits(4, 0x0B, 0)
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_ihysl = i2c_bits.RWBits(8, 0x0C, 0)
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_ihysh = i2c_bits.RWBits(4, 0x0D, 0)
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"""
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#_tthl = Adafruit_bitfield({'TEMP':8})
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_tthl = i2c_bits.RWBits(8, 0x0E, 0)
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#_tthh = Adafruit_bitfield({'TEMP':3, 'SIGN':1})
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_tthh = i2c_bits.RWBits(4, 0x0F, 0)
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def __init__(self, i2c, addr=0x69):
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self.i2c_device = I2CDevice(i2c, addr)
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#enter normal mode
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self._pctl = 0x00
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#software reset
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self._rst = 0x3F
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#disable interrupts by default
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self.disableInterrupt()
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#set to 10 FPS
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self._fps = 0x00
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def disableInterrupt(self):
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self._inten = 0
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def readThermistor(self):
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raw = (self._tthh << 8) | self._tthl
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return self.signedMag12ToFloat(raw) * AMG88xx_THERMISTOR_CONVERSION
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def readPixels(self):
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retbuf = []
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buf = bytearray(3)
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with self.i2c_device as i2c:
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for i in range(0, AMG88xx_PIXEL_ARRAY_SIZE):
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buf[0] = AMG88xx_PIXEL_OFFSET + (i << 1)
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i2c.write(buf, end=1, stop=False)
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i2c.read_into(buf, start=1)
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raw = (buf[2] << 8) | buf[1]
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converted = self.signedMag12ToFloat(raw) * AMG88xx_PIXEL_TEMP_CONVERSION
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retbuf.append(converted)
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return retbuf
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def signedMag12ToFloat(self, val):
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#take first 11 bits as absolute val
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absVal = (val & 0x7FF)
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if val & 0x8000:
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return 0 - float(absVal)
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else:
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return float(absVal)
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21
LICENSE
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LICENSE
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The MIT License (MIT)
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Copyright (c) 2017 Dean Miller, written for Adafruit Industries
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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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The above copyright notice and this permission notice shall be included in all
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copies or substantial portions of the Software.
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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 THE
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SOFTWARE.
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1
README.md
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1
README.md
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# Adafruit_CircuitPython_AMG88xx
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2
requirements.txt
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2
requirements.txt
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adafruit-circuitpython-register
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adafruit-circuitpython-bus-device>=0.2.0
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