diff options
Diffstat (limited to 'Adafruit_Python_GPIO/Adafruit_GPIO/PCA95xx.py')
| -rw-r--r-- | Adafruit_Python_GPIO/Adafruit_GPIO/PCA95xx.py | 121 |
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 deleted file mode 100644 index 2a3b406..0000000 --- a/Adafruit_Python_GPIO/Adafruit_GPIO/PCA95xx.py +++ /dev/null @@ -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 |