klipper update

klippy/extras/gcode_button.py

@@ -0,0 +1,51 @@
+# Support for executing gcode when a hardware button is pressed or released.
+#
+# Copyright (C) 2019 Alec Plumb <alec@etherwalker.com>
+#
+# This file may be distributed under the terms of the GNU GPLv3 license.
+import logging
+
+class GCodeButton:
+    def __init__(self, config):
+        self.printer = config.get_printer()
+        self.name = config.get_name().split(' ')[-1]
+        self.pin = config.get('pin')
+        self.last_state = 0
+        buttons = self.printer.load_object(config, "buttons")
+        if config.get('analog_range', None) is None:
+            buttons.register_buttons([self.pin], self.button_callback)
+        else:
+            amin, amax = config.getfloatlist('analog_range', count=2)
+            pullup = config.getfloat('analog_pullup_resistor', 4700., above=0.)
+            buttons.register_adc_button(self.pin, amin, amax, pullup,
+                                        self.button_callback)
+        gcode_macro = self.printer.load_object(config, 'gcode_macro')
+        self.press_template = gcode_macro.load_template(config, 'press_gcode')
+        self.release_template = gcode_macro.load_template(config,
+                                                          'release_gcode', '')
+        self.gcode = self.printer.lookup_object('gcode')
+        self.gcode.register_mux_command("QUERY_BUTTON", "BUTTON", self.name,
+                                        self.cmd_QUERY_BUTTON,
+                                        desc=self.cmd_QUERY_BUTTON_help)
+
+    cmd_QUERY_BUTTON_help = "Report on the state of a button"
+    def cmd_QUERY_BUTTON(self, gcmd):
+        gcmd.respond_info(self.name + ": " + self.get_status()['state'])
+
+    def button_callback(self, eventtime, state):
+        self.last_state = state
+        template = self.press_template
+        if not state:
+            template = self.release_template
+        try:
+            self.gcode.run_script(template.render())
+        except:
+            logging.exception("Script running error")
+
+    def get_status(self, eventtime=None):
+        if self.last_state:
+            return {'state': "PRESSED"}
+        return {'state': "RELEASED"}
+
+def load_config_prefix(config):
+    return GCodeButton(config)