V1.7.1

klippy/extras/buttons_irq.py

@@ -0,0 +1,94 @@
+# button_irq.py - Klipper Python module for IRQ-driven buttons
+#
+# Copyright (C) 2025  Menson <lms228@163.com>
+#
+# This file may be distributed under the terms of the GNU GPLv3 license.
+
+import logging
+
+class _IRQButtonMCU:
+    def __init__(self, printer, mcu, debounce_us):
+        self.printer = printer
+        self.reactor = printer.get_reactor()
+        self.mcu = mcu
+        self.pin_list = []
+        self.callbacks = []
+        self.oid = mcu.create_oid()
+        self.ack_count = 0
+        self.state = 0
+        self.invert = 0
+        self.debounce_us = debounce_us
+
+        self.mcu.register_response(self._handle_state, "irq_button_state", self.oid)
+        self.mcu.register_config_callback(self._build_config)
+
+    def setup_buttons(self, pin_params_list, callback):
+        mask = 0
+        shift = len(self.pin_list)
+        for pin_params in pin_params_list:
+            if pin_params.get('invert', False):
+                self.invert |= 1 << len(self.pin_list)
+            mask |= 1 << len(self.pin_list)
+            self.pin_list.append(pin_params)
+        self.callbacks.append((mask, shift, callback))
+
+    def _build_config(self):
+        logging.info("_irq_button debounce_us=%d", self.debounce_us)
+        for pin in self.pin_list:
+            self.mcu.add_config_cmd(
+                "config_irq_button oid=%d pin=%s pull_up=%d debounce_us=%d invert=%d" %
+                (self.oid, pin['pin'], pin.get('pullup', 0), self.debounce_us, pin.get('invert', 0))
+            )
+        cmd_queue = self.mcu.alloc_command_queue()
+        self.ack_cmd = self.mcu.lookup_command(
+            "irq_button_ack oid=%c count=%c", cq=cmd_queue)
+
+    def _handle_state(self, msg):
+        count = msg["count"]
+        states = msg["state"]
+        #logging.warning("IRQ button state oid=%d count=%d states=%s",
+        #                 self.oid, count, states)
+        for s in states:
+            s = int(s) ^ self.invert
+            if s != self.state:
+                changed = s ^ self.state
+                self.state = s
+                for mask, shift, callback in self.callbacks:
+                    if changed & mask:
+                        value = (s & mask) >> shift
+                        self.reactor.register_async_callback(
+                            lambda et, c=callback, v=value: c(et, v))
+        self.ack_cmd.send([self.oid, count])
+
+
+class MCU_irq_button:
+    def __init__(self, config):
+        self.printer = config.get_printer()
+        self.irq_buttons = {}
+
+    def register_buttons(self, pins, callback, debounce_us):
+        ppins = self.printer.lookup_object('pins')
+        mcu = mcu_name = None
+        pin_params_list = []
+
+        for pin in pins:
+            pin_params = ppins.lookup_pin(pin, can_invert=True, can_pullup=True)
+            if mcu is not None and pin_params['chip'] != mcu:
+                raise ppins.error("IRQ button pins must be on same MCU")
+            mcu = pin_params['chip']
+            mcu_name = pin_params['chip_name']
+            pin_params_list.append(pin_params)
+
+        mcu_button = self.irq_buttons.get(mcu_name)
+        if (mcu_button is None
+            or len(mcu_button.pin_list) + len(pin_params_list) > 8):
+            logging.warning(
+                "Creating new IRQ button object for MCU '%s' with %d pins",
+                mcu_name, len(pin_params_list))
+            mcu_button = _IRQButtonMCU(self.printer, mcu, debounce_us)
+            self.irq_buttons[mcu_name] = mcu_button
+
+        mcu_button.setup_buttons(pin_params_list, callback)
+
+def load_config(config):
+    return MCU_irq_button(config)