def __init__(self, pin):
"""(formerly Dallas Semi) OneWire protocol.
Protocol definition is here: https://www.maximintegrated.com/en/app-notes/index.mvp/id/126
.. class:: OneWire(pin)
Create a OneWire object associated with the given pin. The object
implements the lowest level timing-sensitive bits of the protocol.
:param ~microcontroller.Pin pin: Pin connected to the OneWire bus
Read a short series of pulses::
from aloriumtech import busio
from aloriumtech import board
onewire = busio.OneWire(board.D7)
onewire.reset()
onewire.write_bit(True)
onewire.write_bit(False)
print(onewire.read_bit())"""
# Make FPGA calls to allow SAMD to control pin
data = 1 << pin[0]
struct.pack_into("<I", self._buffer, 0, data)
addr = _evo.D2F_ENSET_ADDR
_evo.send_evo_write_trans(addr, self._buffer)
self._pin = pin
self._onewire = busio.OneWire(pin[1])
"""Deinitialize the OneWire bus and release any hardware resources for reuse."""
self.deinit = self._onewire.deinit
"""No-op used by Context Managers."""
self.__enter__ = self._onewire.__enter__
"""Automatically deinitializes the hardware when exiting a context. See
:ref:`lifetime-and-contextmanagers` for more info."""
self.__exit__ = self._onewire.__exit__
"""Reset the OneWire bus and read presence
:returns: False when at least one device is present
:rtype: bool"""
self.reset = self._onewire.reset
"""Write out a bit based on value."""
self.write_bit = self._onewire.write_bit
def __init__(self, pin):
# pylint: disable=no-member
self._ow = busio.OneWire(pin)
self._readbit = self._ow.read_bit
self._writebit = self._ow.write_bit
self._maximum_devices = _MAX_DEV
def __init__(self, pin):
self._ow = busio.OneWire(pin)
self._readbit = self._ow.read_bit
self._writebit = self._ow.write_bit