Matthias Blankertz
856bf34161
- Remove Pin to button mapping from hwconfig, replace with a simple list of Pins to which buttons are attached - Add BUTTON_MAP to config.json which maps indices in the HW button list to button names - Update utils.Buttons to use the button map to connect the correct pins to the matching key codes Signed-off-by: Matthias Blankertz <matthias@blankertz.org>
78 lines
2.4 KiB
Python
78 lines
2.4 KiB
Python
# SPDX-License-Identifier: MIT
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# Copyright (c) 2025 Matthias Blankertz <matthias@blankertz.org>
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import asyncio
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import machine
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import micropython
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import time
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try:
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from typing import TYPE_CHECKING # type: ignore
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except ImportError:
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TYPE_CHECKING = False
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if TYPE_CHECKING:
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import typing
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class ButtonCallback(typing.Protocol):
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def onButtonPressed(self, what: int) -> None: ...
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class Buttons:
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VOLUP = micropython.const(1)
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VOLDOWN = micropython.const(2)
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NEXT = micropython.const(3)
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PREV = micropython.const(4)
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PLAY_PAUSE = micropython.const(5)
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KEYMAP = {VOLUP: 'VOLUP',
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VOLDOWN: 'VOLDOWN',
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NEXT: 'NEXT',
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PREV: 'PREV',
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PLAY_PAUSE: 'PLAY_PAUSE'}
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def __init__(self, cb: "ButtonCallback", config, hwconfig):
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self.button_map = config.get_button_map()
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self.hw_buttons = hwconfig.BUTTONS
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self.cb = cb
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self.buttons = dict()
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for key_id, key_name in self.KEYMAP.items():
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pin = self._get_pin(key_name)
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if pin is None:
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continue
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self.buttons[pin] = key_id
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self.int_flag = asyncio.ThreadSafeFlag()
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self.pressed: list[int] = []
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self.last: dict[int, int] = {}
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for button in self.buttons.keys():
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button.irq(handler=self._interrupt, trigger=machine.Pin.IRQ_FALLING | machine.Pin.IRQ_RISING)
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asyncio.create_task(self.task())
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def _get_pin(self, key):
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key_id = self.button_map.get(key, None)
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if key_id is None:
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return None
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if key_id < 0 or key_id >= len(self.hw_buttons):
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return None
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pin = self.hw_buttons[key_id]
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if pin is not None:
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pin.init(machine.Pin.IN, machine.Pin.PULL_UP)
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return pin
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def _interrupt(self, button):
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keycode = self.buttons[button]
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last = self.last.get(keycode, 0)
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now = time.ticks_ms()
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self.last[keycode] = now
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if now - last < 10:
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# debounce, discard
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return
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if button.value() == 0:
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# print(f'B{keycode} {now}')
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self.pressed.append(keycode)
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self.int_flag.set()
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async def task(self):
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while True:
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await self.int_flag.wait()
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while len(self.pressed) > 0:
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what = self.pressed.pop()
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self.cb.onButtonPressed(what)
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