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authorCody Hiar <codyfh@gmail.com>2018-05-27 15:29:21 -0600
committerCody Hiar <codyfh@gmail.com>2018-05-27 15:29:21 -0600
commitceec171c42bd79f1762b971569e20ead656f4fd0 (patch)
tree1880be0b1cef9786be5bc818cbd50095cd797a6d /Adafruit_Python_GPIO/Adafruit_GPIO/PCA95xx.py
parent611a8b7be4331e4f8416c4d10a0be47a109b47e4 (diff)
Moving libs into separate own directory
Diffstat (limited to 'Adafruit_Python_GPIO/Adafruit_GPIO/PCA95xx.py')
-rw-r--r--Adafruit_Python_GPIO/Adafruit_GPIO/PCA95xx.py121
1 files changed, 0 insertions, 121 deletions
diff --git a/Adafruit_Python_GPIO/Adafruit_GPIO/PCA95xx.py b/Adafruit_Python_GPIO/Adafruit_GPIO/PCA95xx.py
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--- a/Adafruit_Python_GPIO/Adafruit_GPIO/PCA95xx.py
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@@ -1,121 +0,0 @@
-'''
-Adafruit compatible using BaseGPIO class to represent a PCA9555 IO expander
-Copyright (C) 2016 Matias Vidal
-Ported from: https://github.com/dberlin/PCA95XX
-
-# Copyright 2012 Daniel Berlin
-
-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 Adafruit_GPIO as GPIO
-import Adafruit_GPIO.I2C as I2C
-
-# For the PCA 953X and 955X series, the chips with 8 GPIO's have these port numbers
-# The chips with 16 GPIO's have the first port for each type at double these numbers
-# IE The first config port is 6
-
-INPUT_PORT = 0
-OUTPUT_PORT = 1
-POLARITY_PORT = 2
-CONFIG_PORT = 3
-
-IN = GPIO.IN
-OUT = GPIO.OUT
-HIGH = GPIO.HIGH
-LOW = GPIO.LOW
-
-
-class PCA9555(GPIO.BaseGPIO):
- """Class to represent a PCA9555 GPIO extender. Compatible
- with the Adafruit_GPIO BaseGPIO class so it can be used as a custom GPIO
- class for interacting with device.
- """
- NUM_GPIO = 16
-
- def __init__(self, address=0x20, busnum=None, i2c=None, num_gpios=16, **kwargs):
- address = int(address)
- self.__name__ = "PCA955"
- # Create I2C device.
- i2c = i2c or I2C
- busnum = busnum or i2c.get_default_bus()
- self._device = i2c.get_i2c_device(address, busnum, **kwargs)
- self.num_gpios = num_gpios
-
- if self.num_gpios <= 8:
- self.iodir = self._device.readU8(CONFIG_PORT)
- self.outputvalue = self._device.readU8(OUTPUT_PORT)
-
- elif self.num_gpios > 8 and self.num_gpios <= 16:
- self.iodir = self._device.readU16(CONFIG_PORT<< 1)
- self.outputvalue = self._device.readU16(OUTPUT_PORT << 1)
-
- def _changebit(self, bitmap, bit, value):
- assert value == 1 or value == 0, "Value is %s must be 1 or 0" % value
- if value == 0:
- return bitmap & ~(1 << bit)
- elif value == 1:
- return bitmap | (1 << bit)
-
- # Change the value of bit PIN on port PORT to VALUE. If the
- # current pin state for the port is passed in as PORTSTATE, we
- # will avoid doing a read to get it. The port pin state must be
- # complete if passed in (IE it should not just be the value of the
- # single pin we are trying to change)
- def _readandchangepin(self, port, pin, value, portstate = None):
- assert pin >= 0 and pin < self.num_gpios, "Pin number %s is invalid, only 0-%s are valid" % (pin, self.num_gpios)
- if not portstate:
- if self.num_gpios <= 8:
- portstate = self._device.readU8(port)
- elif self.num_gpios > 8 and self.num_gpios <= 16:
- portstate = self._device.readU16(port << 1)
- newstate = self._changebit(portstate, pin, value)
- if self.num_gpios <= 8:
- self._device.write8(port, newstate)
- else:
- self._device.write16(port << 1, newstate)
- return newstate
-
- # Polarity inversion
- def polarity(self, pin, value):
- return self._readandchangepin(POLARITY_PORT, pin, value)
-
- # Pin direction
- def config(self, pin, mode):
- self.iodir = self._readandchangepin(CONFIG_PORT, pin, mode, self.iodir)
- return self.iodir
-
- def output(self, pin, value):
- assert self.iodir & (1 << pin) == 0, "Pin %s not set to output" % pin
- self.outputvalue = self._readandchangepin(OUTPUT_PORT, pin, value, self.outputvalue)
- return self.outputvalue
-
- def input(self, pin):
- assert self.iodir & (1 << pin) != 0, "Pin %s not set to input" % pin
- if self.num_gpios <= 8:
- value = self._device.readU8(INPUT_PORT)
- elif self.num_gpios > 8 and self.num_gpios <= 16:
- value = self._device.readU16(INPUT_PORT << 1)
- return value & (1 << pin)
-
- def setup(self, pin, mode):
- self.config(pin, mode)
-
- def cleanup(self, pin=None):
- # nothing to cleanup
- pass