299 lines
9.9 KiB
Python
299 lines
9.9 KiB
Python
# The MIT License (MIT)
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#
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# Copyright (c) 2019 arofarn
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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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`neotrellism4`
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================================================================================
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Use Adafruit TrellisM4 Express board as 2 Neotrellis seesaw boards with CircuitPython.
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You can you use this to extend TrellisM4 with Neotrellis (seesaw) boards.
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* Author(s): arofarn
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Implementation Notes
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--------------------
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**Hardware:**
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* Adafruit NeoTrellis M4 Express: https://www.adafruit.com/product/3938
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**Software and Dependencies:**
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* Adafruit CircuitPython firmware for the supported boards:
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https://github.com/adafruit/circuitpython/releases
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"""
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# imports
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__version__ = "0.0.0-auto.0"
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__repo__ = "https://github.com/arofarn/NeoTrellisM4.git"
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import board
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import digitalio
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from micropython import const
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from adafruit_seesaw.keypad import KeyEvent
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from adafruit_matrixkeypad import Matrix_Keypad
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from neopixel import NeoPixel
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_NEO_TRELLIS_NUM_ROWS = const(4)
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_NEO_TRELLIS_NUM_COLS = const(4)
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_NEO_TRELLIS_NUM_KEYS = const(16)
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# _NEO_TRELLIS_MAX_CALLBACKS = const(32)
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_TRELLISM4_LEFT_PART = const(0)
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_TRELLISM4_RIGHT_PART = const(4)
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def _key(xval):
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return int(int(xval/4)*8 + (xval%4))
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def _seesaw_key(xval):
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return int(int(xval/8)*4 + (xval%8))
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def _to_seesaw_key(xval):
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return int(xval + (xval // 4) * 4)
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class _TrellisNeoPixel:
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"""Neopixel driver
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"""
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# Lots of stuff come from Adafruit_CircuitPython_seesaw/neopixel.py
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def __init__(self, auto_write=True, brightness=1.0,
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part=_TRELLISM4_LEFT_PART, left_part=None):
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if part == _TRELLISM4_LEFT_PART:
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self.pix = NeoPixel(board.NEOPIXEL, 32, auto_write=False, brightness=brightness)
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elif part == _TRELLISM4_RIGHT_PART:
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self.pix = left_part.pix
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self.auto_write = auto_write
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self._offset = part
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def __setitem__(self, key, color):
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self.pix[_key(key) + self._offset] = color
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if self.auto_write:
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self.show()
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def __getitem__(self, key):
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return self.pix[_key(key) + self._offset]
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def fill(self, color):
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"""Fill method wrapper
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"""
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# Suppress auto_write while filling.
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current_auto_write = self.auto_write
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self.auto_write = False
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for i in range(16):
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self[i] = color
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if current_auto_write:
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self.show()
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self.auto_write = current_auto_write
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def show(self):
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"""Fill method wrapper
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"""
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self.pix.show()
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class _TrellisKeypad:
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"""Simple Keypad object for Trellis M4
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No pixel, no rotation
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Key numbers : 0 - 15"""
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def __init__(self, part=_TRELLISM4_LEFT_PART, row_pins=None):
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self._offset = part
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col_pins = []
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for x in range(self._offset, self._offset + _NEO_TRELLIS_NUM_COLS):
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col_pin = digitalio.DigitalInOut(getattr(board, "COL{}".format(x)))
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col_pins.append(col_pin)
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if part == _TRELLISM4_LEFT_PART:
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self.row_pins = []
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for y in range(_NEO_TRELLIS_NUM_ROWS):
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row_pin = digitalio.DigitalInOut(getattr(board, "ROW{}".format(y)))
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self.row_pins.append(row_pin)
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elif part == _TRELLISM4_RIGHT_PART:
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if row_pins is None:
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raise ValueError("Missing row_pins list for the right part")
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else:
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self.row_pins = row_pins
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else:
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raise ValueError("part arg should be 0 (left part) or 4 (right part)")
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key_names = []
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for y in range(4):
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row = []
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for x in range(4):
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row.append(4 * x + y)
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key_names.append(row) # Keys of each halves is numbered from 0-15
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self._matrix = Matrix_Keypad(col_pins, self.row_pins, key_names)
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@property
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def pressed_keys(self):
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"""A list of tuples of currently pressed button coordinates.
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.. code-block:: python
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import time
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import adafruit_trellism4
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trellis = adafruit_trellism4.TrellisM4Express()
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current_press = set()
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while True:
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pressed = set(trellis.pressed_keys)
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for press in pressed - current_press:
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print("Pressed:", press)
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for release in current_press - pressed:
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print("Released:", release)
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time.sleep(0.08)
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current_press = pressed
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"""
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return self._matrix.pressed_keys
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class NeoTrellisM4:
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"""Driver for the Adafruit NeoTrellis."""
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EDGE_HIGH = const(0)
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EDGE_LOW = const(1)
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EDGE_FALLING = const(2)
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EDGE_RISING = const(3)
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def __init__(self, left_part=None):
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if left_part is None:
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self._offset = _TRELLISM4_LEFT_PART
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self.pixels = _TrellisNeoPixel()
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self.keypad = _TrellisKeypad()
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else:
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self._offset = _TRELLISM4_RIGHT_PART
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self.pixels = _TrellisNeoPixel(32,
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part=_TRELLISM4_RIGHT_PART,
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left_part=left_part.pixels)
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self.keypad = _TrellisKeypad(part=_TRELLISM4_RIGHT_PART,
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row_pins=left_part.keypad.row_pins)
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self._events = [0] * _NEO_TRELLIS_NUM_KEYS
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self._current_press = set()
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self._key_edges = [self.EDGE_HIGH] * _NEO_TRELLIS_NUM_KEYS # Keys edges
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self._current_events = bytearray()
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self.callbacks = [None] * 16
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@property
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def interrupt_enabled(self):
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"""Only for compatibility with neotrellis module
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interrupts are disable on trellis M4 keypad"""
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return False
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# pylint: disable=unused-argument, no-self-use
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@interrupt_enabled.setter
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def interrupt_enabled(self, value):
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"""Only for compatibility with neotrellis module
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interrupts are disable on trellis M4 keypad
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"""
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print("Warning: no interrupt with Trellis M4 keypad (method does nothing)")
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# pylint: enable=unused-argument, no-self-use
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@property
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def count(self):
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"""Return the pressed keys count
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"""
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self._read_keypad()
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return len(self._current_events)
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# pylint: disable=unused-argument, no-self-use
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@count.setter
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def count(self, value):
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"""Only for compatibility with neotrellis module
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"""
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raise AttributeError("count is read only")
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# pylint: enable=unused-argument, no-self-use
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def set_event(self, key, edge, enable):
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"""Set event on a key
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"""
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if enable not in (True, False):
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raise ValueError("event enable must be True or False")
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if edge > 3 or edge < 0:
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raise ValueError("invalid edge")
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# Pas besoin de l'écriture sur I2C mais de l'enregistrer dans self._events
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if enable:
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self._events[key] = self._events[key] | (1 << edge)
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else:
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self._events[key] = self._events[key] & (0xF ^ (1 << edge))
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def read_keypad(self, num):
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"""Give the n events in the keypad buffer
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"""
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while num > len(self._current_events):
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self._current_events.append(0xFF)
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return self._current_events[:num]
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def _read_keypad(self):
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"""Read keypad and update _key_edges and _current_events"""
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pressed = set(self.keypad.pressed_keys)
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#default : not pressed => EDGE_HIGH
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self._key_edges = [self.EDGE_HIGH] * _NEO_TRELLIS_NUM_KEYS
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for k in pressed:
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self._key_edges[k] = self.EDGE_LOW
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for k in pressed - self._current_press:
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self._key_edges[k] = self.EDGE_RISING
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for k in self._current_press - pressed:
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self._key_edges[k] = self.EDGE_FALLING
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self._current_press = pressed
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self._current_events = bytearray()
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for k in range(_NEO_TRELLIS_NUM_KEYS):
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if (self._events[k] >> self._key_edges[k]) & 0x1:
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raw_evt = (_to_seesaw_key(k) << 2) | self._key_edges[k]
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self._current_events.append(raw_evt)
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def activate_key(self, key, edge, enable=True):
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"""Activate or deactivate a key on the trellis. Key is the key number from
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0 to 15. Edge specifies what edge to register an event on and can be
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NeoTrellis.EDGE_FALLING or NeoTrellis.EDGE_RISING. enable should be set
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to True if the event is to be enabled, or False if the event is to be
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disabled.
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"""
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self.set_event(key, edge, enable)
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def sync(self):
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"""Read any events from the Trellis hardware and call associated
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callbacks
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"""
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available = self.count
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if available > 0:
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available = available + 2
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buf = self.read_keypad(available)
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for raw in buf:
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evt = KeyEvent(_seesaw_key((raw >> 2) & 0x3F), raw & 0x3)
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if evt.number < _NEO_TRELLIS_NUM_KEYS and self.callbacks[evt.number] is not None:
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self.callbacks[evt.number](evt)
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