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95 lines
3.5 KiB
Python
95 lines
3.5 KiB
Python
# button_irq.py - Klipper Python module for IRQ-driven buttons
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#
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# Copyright (C) 2025 Menson <lms228@163.com>
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#
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# This file may be distributed under the terms of the GNU GPLv3 license.
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import logging
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class _IRQButtonMCU:
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def __init__(self, printer, mcu, debounce_us):
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self.printer = printer
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self.reactor = printer.get_reactor()
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self.mcu = mcu
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self.pin_list = []
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self.callbacks = []
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self.oid = mcu.create_oid()
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self.ack_count = 0
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self.state = 0
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self.invert = 0
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self.debounce_us = debounce_us
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self.mcu.register_response(self._handle_state, "irq_button_state", self.oid)
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self.mcu.register_config_callback(self._build_config)
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def setup_buttons(self, pin_params_list, callback):
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mask = 0
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shift = len(self.pin_list)
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for pin_params in pin_params_list:
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if pin_params.get('invert', False):
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self.invert |= 1 << len(self.pin_list)
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mask |= 1 << len(self.pin_list)
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self.pin_list.append(pin_params)
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self.callbacks.append((mask, shift, callback))
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def _build_config(self):
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logging.info("_irq_button debounce_us=%d", self.debounce_us)
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for pin in self.pin_list:
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self.mcu.add_config_cmd(
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"config_irq_button oid=%d pin=%s pull_up=%d debounce_us=%d invert=%d" %
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(self.oid, pin['pin'], pin.get('pullup', 0), self.debounce_us, pin.get('invert', 0))
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)
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cmd_queue = self.mcu.alloc_command_queue()
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self.ack_cmd = self.mcu.lookup_command(
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"irq_button_ack oid=%c count=%c", cq=cmd_queue)
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def _handle_state(self, msg):
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count = msg["count"]
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states = msg["state"]
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#logging.warning("IRQ button state oid=%d count=%d states=%s",
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# self.oid, count, states)
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for s in states:
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s = int(s) ^ self.invert
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if s != self.state:
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changed = s ^ self.state
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self.state = s
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for mask, shift, callback in self.callbacks:
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if changed & mask:
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value = (s & mask) >> shift
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self.reactor.register_async_callback(
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lambda et, c=callback, v=value: c(et, v))
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self.ack_cmd.send([self.oid, count])
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class MCU_irq_button:
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def __init__(self, config):
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self.printer = config.get_printer()
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self.irq_buttons = {}
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def register_buttons(self, pins, callback, debounce_us):
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ppins = self.printer.lookup_object('pins')
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mcu = mcu_name = None
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pin_params_list = []
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for pin in pins:
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pin_params = ppins.lookup_pin(pin, can_invert=True, can_pullup=True)
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if mcu is not None and pin_params['chip'] != mcu:
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raise ppins.error("IRQ button pins must be on same MCU")
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mcu = pin_params['chip']
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mcu_name = pin_params['chip_name']
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pin_params_list.append(pin_params)
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mcu_button = self.irq_buttons.get(mcu_name)
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if (mcu_button is None
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or len(mcu_button.pin_list) + len(pin_params_list) > 8):
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logging.warning(
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"Creating new IRQ button object for MCU '%s' with %d pins",
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mcu_name, len(pin_params_list))
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mcu_button = _IRQButtonMCU(self.printer, mcu, debounce_us)
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self.irq_buttons[mcu_name] = mcu_button
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mcu_button.setup_buttons(pin_params_list, callback)
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def load_config(config):
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return MCU_irq_button(config)
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