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Diffstat (limited to 'Adafruit_Python_GPIO/Adafruit_GPIO/MCP230xx.py')
| -rw-r--r-- | Adafruit_Python_GPIO/Adafruit_GPIO/MCP230xx.py | 165 |
1 files changed, 0 insertions, 165 deletions
diff --git a/Adafruit_Python_GPIO/Adafruit_GPIO/MCP230xx.py b/Adafruit_Python_GPIO/Adafruit_GPIO/MCP230xx.py deleted file mode 100644 index 3ba8b5f..0000000 --- a/Adafruit_Python_GPIO/Adafruit_GPIO/MCP230xx.py +++ /dev/null @@ -1,165 +0,0 @@ -# Copyright (c) 2014 Adafruit Industries -# Author: 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 math - -import Adafruit_GPIO as GPIO -import Adafruit_GPIO.I2C as I2C - - -class MCP230xxBase(GPIO.BaseGPIO): - """Base class to represent an MCP230xx series GPIO extender. Is compatible - with the Adafruit_GPIO BaseGPIO class so it can be used as a custom GPIO - class for interacting with device. - """ - - def __init__(self, address, i2c=None, **kwargs): - """Initialize MCP230xx at specified I2C address and bus number. If bus - is not specified it will default to the appropriate platform detected bus. - """ - # Create I2C device. - if i2c is None: - import Adafruit_GPIO.I2C as I2C - i2c = I2C - self._device = i2c.get_i2c_device(address, **kwargs) - # Assume starting in ICON.BANK = 0 mode (sequential access). - # Compute how many bytes are needed to store count of GPIO. - self.gpio_bytes = int(math.ceil(self.NUM_GPIO/8.0)) - # Buffer register values so they can be changed without reading. - self.iodir = [0xFF]*self.gpio_bytes # Default direction to all inputs. - self.gppu = [0x00]*self.gpio_bytes # Default to pullups disabled. - self.gpio = [0x00]*self.gpio_bytes - # Write current direction and pullup buffer state. - self.write_iodir() - self.write_gppu() - - - def setup(self, pin, value): - """Set the input or output mode for a specified pin. Mode should be - either GPIO.OUT or GPIO.IN. - """ - self._validate_pin(pin) - # Set bit to 1 for input or 0 for output. - if value == GPIO.IN: - self.iodir[int(pin/8)] |= 1 << (int(pin%8)) - elif value == GPIO.OUT: - self.iodir[int(pin/8)] &= ~(1 << (int(pin%8))) - else: - raise ValueError('Unexpected value. Must be GPIO.IN or GPIO.OUT.') - self.write_iodir() - - - def output(self, pin, value): - """Set the specified pin the provided high/low value. Value should be - either GPIO.HIGH/GPIO.LOW or a boolean (True = HIGH). - """ - self.output_pins({pin: value}) - - def output_pins(self, pins): - """Set multiple pins high or low at once. Pins should be a dict of pin - name to pin value (HIGH/True for 1, LOW/False for 0). All provided pins - will be set to the given values. - """ - [self._validate_pin(pin) for pin in pins.keys()] - # Set each changed pin's bit. - for pin, value in iter(pins.items()): - if value: - self.gpio[int(pin/8)] |= 1 << (int(pin%8)) - else: - self.gpio[int(pin/8)] &= ~(1 << (int(pin%8))) - # Write GPIO state. - self.write_gpio() - - - def input(self, pin): - """Read the specified pin and return GPIO.HIGH/True if the pin is pulled - high, or GPIO.LOW/False if pulled low. - """ - return self.input_pins([pin])[0] - - def input_pins(self, pins): - """Read multiple pins specified in the given list and return list of pin values - GPIO.HIGH/True if the pin is pulled high, or GPIO.LOW/False if pulled low. - """ - [self._validate_pin(pin) for pin in pins] - # Get GPIO state. - self.gpio = self._device.readList(self.GPIO, self.gpio_bytes) - # Return True if pin's bit is set. - return [(self.gpio[int(pin/8)] & 1 << (int(pin%8))) > 0 for pin in pins] - - - def pullup(self, pin, enabled): - """Turn on the pull-up resistor for the specified pin if enabled is True, - otherwise turn off the pull-up resistor. - """ - self._validate_pin(pin) - if enabled: - self.gppu[int(pin/8)] |= 1 << (int(pin%8)) - else: - self.gppu[int(pin/8)] &= ~(1 << (int(pin%8))) - self.write_gppu() - - def write_gpio(self, gpio=None): - """Write the specified byte value to the GPIO registor. If no value - specified the current buffered value will be written. - """ - if gpio is not None: - self.gpio = gpio - self._device.writeList(self.GPIO, self.gpio) - - def write_iodir(self, iodir=None): - """Write the specified byte value to the IODIR registor. If no value - specified the current buffered value will be written. - """ - if iodir is not None: - self.iodir = iodir - self._device.writeList(self.IODIR, self.iodir) - - def write_gppu(self, gppu=None): - """Write the specified byte value to the GPPU registor. If no value - specified the current buffered value will be written. - """ - if gppu is not None: - self.gppu = gppu - self._device.writeList(self.GPPU, self.gppu) - - -class MCP23017(MCP230xxBase): - """MCP23017-based GPIO class with 16 GPIO pins.""" - # Define number of pins and registor addresses. - NUM_GPIO = 16 - IODIR = 0x00 - GPIO = 0x12 - GPPU = 0x0C - - def __init__(self, address=0x20, **kwargs): - super(MCP23017, self).__init__(address, **kwargs) - - -class MCP23008(MCP230xxBase): - """MCP23008-based GPIO class with 8 GPIO pins.""" - # Define number of pins and registor addresses. - NUM_GPIO = 8 - IODIR = 0x00 - GPIO = 0x09 - GPPU = 0x06 - - def __init__(self, address=0x20, **kwargs): - super(MCP23008, self).__init__(address, **kwargs) |