mirror of https://github.com/Desuuuu/klipper.git
254 lines
9.7 KiB
Python
254 lines
9.7 KiB
Python
# Support for button detection and callbacks
|
|
#
|
|
# Copyright (C) 2018 Kevin O'Connor <kevin@koconnor.net>
|
|
#
|
|
# This file may be distributed under the terms of the GNU GPLv3 license.
|
|
import logging
|
|
|
|
|
|
######################################################################
|
|
# Button state tracking
|
|
######################################################################
|
|
|
|
QUERY_TIME = .002
|
|
RETRANSMIT_COUNT = 50
|
|
|
|
class MCU_buttons:
|
|
def __init__(self, printer, mcu):
|
|
self.reactor = printer.get_reactor()
|
|
self.mcu = mcu
|
|
self.mcu.register_config_callback(self.build_config)
|
|
self.pin_list = []
|
|
self.callbacks = []
|
|
self.invert = self.last_button = 0
|
|
self.ack_cmd = None
|
|
self.ack_count = 0
|
|
def setup_buttons(self, pins, callback):
|
|
mask = 0
|
|
shift = len(self.pin_list)
|
|
for pin_params in pins:
|
|
if pin_params['invert']:
|
|
self.invert |= 1 << len(self.pin_list)
|
|
mask |= 1 << len(self.pin_list)
|
|
self.pin_list.append((pin_params['pin'], pin_params['pullup']))
|
|
self.callbacks.append((mask, shift, callback))
|
|
def build_config(self):
|
|
if not self.pin_list:
|
|
return
|
|
self.oid = self.mcu.create_oid()
|
|
self.mcu.add_config_cmd("config_buttons oid=%d button_count=%d" % (
|
|
self.oid, len(self.pin_list)))
|
|
for i, (pin, pull_up) in enumerate(self.pin_list):
|
|
self.mcu.add_config_cmd(
|
|
"buttons_add oid=%d pos=%d pin=%s pull_up=%d" % (
|
|
self.oid, i, pin, pull_up), is_init=True)
|
|
cmd_queue = self.mcu.alloc_command_queue()
|
|
self.ack_cmd = self.mcu.lookup_command(
|
|
"buttons_ack oid=%c count=%c", cq=cmd_queue)
|
|
clock = self.mcu.get_query_slot(self.oid)
|
|
rest_ticks = self.mcu.seconds_to_clock(QUERY_TIME)
|
|
self.mcu.add_config_cmd(
|
|
"buttons_query oid=%d clock=%d"
|
|
" rest_ticks=%d retransmit_count=%d invert=%d" % (
|
|
self.oid, clock, rest_ticks, RETRANSMIT_COUNT,
|
|
self.invert), is_init=True)
|
|
self.mcu.register_response(self.handle_buttons_state,
|
|
"buttons_state", self.oid)
|
|
def handle_buttons_state(self, params):
|
|
# Expand the message ack_count from 8-bit
|
|
ack_count = self.ack_count
|
|
ack_diff = (ack_count - params['ack_count']) & 0xff
|
|
if ack_diff & 0x80:
|
|
ack_diff -= 0x100
|
|
msg_ack_count = ack_count - ack_diff
|
|
# Determine new buttons
|
|
buttons = bytearray(params['state'])
|
|
new_count = msg_ack_count + len(buttons) - self.ack_count
|
|
if new_count <= 0:
|
|
return
|
|
new_buttons = buttons[-new_count:]
|
|
# Send ack to MCU
|
|
self.ack_cmd.send([self.oid, new_count])
|
|
self.ack_count += new_count
|
|
# Call self.handle_button() with this event in main thread
|
|
for nb in new_buttons:
|
|
self.reactor.register_async_callback(
|
|
(lambda e, s=self, b=nb: s.handle_button(e, b)))
|
|
def handle_button(self, eventtime, button):
|
|
button ^= self.invert
|
|
changed = button ^ self.last_button
|
|
for mask, shift, callback in self.callbacks:
|
|
if changed & mask:
|
|
callback(eventtime, (button & mask) >> shift)
|
|
self.last_button = button
|
|
|
|
|
|
######################################################################
|
|
# ADC button tracking
|
|
######################################################################
|
|
|
|
ADC_REPORT_TIME = 0.015
|
|
ADC_DEBOUNCE_TIME = 0.025
|
|
ADC_SAMPLE_TIME = 0.001
|
|
ADC_SAMPLE_COUNT = 6
|
|
|
|
class MCU_ADC_buttons:
|
|
def __init__(self, printer, pin, pullup):
|
|
self.reactor = printer.get_reactor()
|
|
self.buttons = []
|
|
self.last_button = None
|
|
self.last_pressed = None
|
|
self.last_debouncetime = 0
|
|
self.pullup = pullup
|
|
self.pin = pin
|
|
self.min_value = 999999999999.9
|
|
self.max_value = 0.
|
|
ppins = printer.lookup_object('pins')
|
|
self.mcu_adc = ppins.setup_pin('adc', self.pin)
|
|
self.mcu_adc.setup_minmax(ADC_SAMPLE_TIME, ADC_SAMPLE_COUNT)
|
|
self.mcu_adc.setup_adc_callback(ADC_REPORT_TIME, self.adc_callback)
|
|
query_adc = printer.lookup_object('query_adc')
|
|
query_adc.register_adc('adc_button:' + pin.strip(), self.mcu_adc)
|
|
|
|
def setup_button(self, min_value, max_value, callback):
|
|
self.min_value = min(self.min_value, min_value)
|
|
self.max_value = max(self.max_value, max_value)
|
|
self.buttons.append((min_value, max_value, callback))
|
|
|
|
def adc_callback(self, read_time, read_value):
|
|
adc = max(.00001, min(.99999, read_value))
|
|
value = self.pullup * adc / (1.0 - adc)
|
|
|
|
# Determine button pressed
|
|
btn = None
|
|
if self.min_value <= value <= self.max_value:
|
|
for i, (min_value, max_value, cb) in enumerate(self.buttons):
|
|
if min_value < value < max_value:
|
|
btn = i
|
|
break
|
|
|
|
# If the button changed, due to noise or pressing:
|
|
if btn != self.last_button:
|
|
# reset the debouncing timer
|
|
self.last_debouncetime = read_time
|
|
|
|
# button debounce check & new button pressed
|
|
if ((read_time - self.last_debouncetime) >= ADC_DEBOUNCE_TIME
|
|
and self.last_button == btn and self.last_pressed != btn):
|
|
# release last_pressed
|
|
if self.last_pressed is not None:
|
|
self.call_button(self.last_pressed, False)
|
|
self.last_pressed = None
|
|
if btn is not None:
|
|
self.call_button(btn, True)
|
|
self.last_pressed = btn
|
|
|
|
self.last_button = btn
|
|
|
|
def call_button(self, button, state):
|
|
minval, maxval, callback = self.buttons[button]
|
|
self.reactor.register_async_callback(
|
|
(lambda e, cb=callback, s=state: cb(e, s)))
|
|
|
|
|
|
######################################################################
|
|
# Rotary Encoders
|
|
######################################################################
|
|
|
|
# Rotary encoder handler https://github.com/brianlow/Rotary
|
|
# Copyright 2011 Ben Buxton (bb@cactii.net).
|
|
# Licenced under the GNU GPL Version 3.
|
|
R_START = 0x0
|
|
R_CW_FINAL = 0x1
|
|
R_CW_BEGIN = 0x2
|
|
R_CW_NEXT = 0x3
|
|
R_CCW_BEGIN = 0x4
|
|
R_CCW_FINAL = 0x5
|
|
R_CCW_NEXT = 0x6
|
|
R_DIR_CW = 0x10
|
|
R_DIR_CCW = 0x20
|
|
R_DIR_MSK = 0x30
|
|
# Use the full-step state table (emits a code at 00 only)
|
|
ENCODER_STATES = (
|
|
# R_START
|
|
(R_START, R_CW_BEGIN, R_CCW_BEGIN, R_START),
|
|
# R_CW_FINAL
|
|
(R_CW_NEXT, R_START, R_CW_FINAL, R_START | R_DIR_CW),
|
|
# R_CW_BEGIN
|
|
(R_CW_NEXT, R_CW_BEGIN, R_START, R_START),
|
|
# R_CW_NEXT
|
|
(R_CW_NEXT, R_CW_BEGIN, R_CW_FINAL, R_START),
|
|
# R_CCW_BEGIN
|
|
(R_CCW_NEXT, R_START, R_CCW_BEGIN, R_START),
|
|
# R_CCW_FINAL
|
|
(R_CCW_NEXT, R_CCW_FINAL, R_START, R_START | R_DIR_CCW),
|
|
# R_CCW_NEXT
|
|
(R_CCW_NEXT, R_CCW_FINAL, R_CCW_BEGIN, R_START)
|
|
)
|
|
|
|
class RotaryEncoder:
|
|
def __init__(self, cw_callback, ccw_callback):
|
|
self.cw_callback = cw_callback
|
|
self.ccw_callback = ccw_callback
|
|
self.encoder_state = R_START
|
|
def encoder_callback(self, eventtime, state):
|
|
es = ENCODER_STATES[self.encoder_state & 0xf][state & 0x3]
|
|
self.encoder_state = es
|
|
if es & R_DIR_MSK == R_DIR_CW:
|
|
self.cw_callback(eventtime)
|
|
elif es & R_DIR_MSK == R_DIR_CCW:
|
|
self.ccw_callback(eventtime)
|
|
|
|
|
|
######################################################################
|
|
# Button registration code
|
|
######################################################################
|
|
|
|
class PrinterButtons:
|
|
def __init__(self, config):
|
|
self.printer = config.get_printer()
|
|
self.printer.load_object(config, 'query_adc')
|
|
self.mcu_buttons = {}
|
|
self.adc_buttons = {}
|
|
def register_adc_button(self, pin, min_val, max_val, pullup, callback):
|
|
adc_buttons = self.adc_buttons.get(pin)
|
|
if adc_buttons is None:
|
|
self.adc_buttons[pin] = adc_buttons = MCU_ADC_buttons(
|
|
self.printer, pin, pullup)
|
|
adc_buttons.setup_button(min_val, max_val, callback)
|
|
def register_adc_button_push(self, pin, min_val, max_val, pullup, callback):
|
|
def helper(eventtime, state, callback=callback):
|
|
if state:
|
|
callback(eventtime)
|
|
self.register_adc_button(pin, min_val, max_val, pullup, helper)
|
|
def register_buttons(self, pins, callback):
|
|
# Parse pins
|
|
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("button pins must be on same mcu")
|
|
mcu = pin_params['chip']
|
|
mcu_name = pin_params['chip_name']
|
|
pin_params_list.append(pin_params)
|
|
# Register pins and callback with the appropriate MCU
|
|
mcu_buttons = self.mcu_buttons.get(mcu_name)
|
|
if (mcu_buttons is None
|
|
or len(mcu_buttons.pin_list) + len(pin_params_list) > 8):
|
|
self.mcu_buttons[mcu_name] = mcu_buttons = MCU_buttons(
|
|
self.printer, mcu)
|
|
mcu_buttons.setup_buttons(pin_params_list, callback)
|
|
def register_rotary_encoder(self, pin1, pin2, cw_callback, ccw_callback):
|
|
re = RotaryEncoder(cw_callback, ccw_callback)
|
|
self.register_buttons([pin1, pin2], re.encoder_callback)
|
|
def register_button_push(self, pin, callback):
|
|
def helper(eventtime, state, callback=callback):
|
|
if state:
|
|
callback(eventtime)
|
|
self.register_buttons([pin], helper)
|
|
|
|
def load_config(config):
|
|
return PrinterButtons(config)
|