w600_micropython_examples/button/button.py at main · sigmdel/w600_micropython_examples · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
'''
https://github.com/ubidefeo/MicroPython-Button
'''

from machine import Pin
class Button(object):

    rest_state = False
    # pin = None
    # pin_number = 0
    RELEASED = 'released'
    PRESSED = 'pressed'
    old_value = 0
    def __init__(self, pin, rest_state = False, callback = None, internal_pullup = False, internal_pulldown = False):
        self.pin_number = pin
        self.rest_state = rest_state
        if internal_pulldown:
            self.internal_pull = Pin.PULL_DOWN
            self.rest_state = False
        elif internal_pullup:
            self.internal_pull = Pin.PULL_UP
            self.rest_state = True
        else:
            self.internal_pull = None

        self.pin = Pin(pin, mode = Pin.IN, pull = self.internal_pull)

        self.callback = callback
        self.active = False
        #self.old_value = self.pin.value()

    def update(self):
        #if self.pin.value() != self.old_value:
        #    print("Button pin value:", self.pin.value())
        #    self.old_value = self.pin.value()
        if self.pin.value() == (not self.rest_state) and (not self.active):
            self.active = True
            if self.callback != None:
                self.callback(self.pin_number, Button.PRESSED)
            return
        if self.pin.value() == self.rest_state and self.active:
            self.active = False
            if self.callback != None:
                self.callback(self.pin_number, Button.RELEASED)
            return