Python-Raspberry-Pi创建Kivy酒吧

Question

我的代码没有按预期工作。 仅当read\ U Sensor GERAL为真时才应创建条形图，仅当read\ U Sensor GERAL为真且read\ U Sensor为假时才应激活蜂鸣器。 因为创建其他条只有barGeral等于True？ 我的代码：

from kivy.app import App
from kivy.clock import Clock
from kivy.core.window import Window
from kivy.graphics import Color, Rectangle
from kivy.properties import NumericProperty
from kivy.uix.floatlayout import FloatLayout
from kivy.uix.widget import Widget
import RPi.GPIO as GPIO
import time

GPIO.setmode(GPIO.BCM)
GPIO.setup(26, GPIO.IN, pull_up_down = GPIO.PUD_DOWN) #pino sensor 1
GPIO.setup(20, GPIO.IN, pull_up_down = GPIO.PUD_DOWN)     #pino sensor 2
GPIO.setup(21, GPIO.IN, pull_up_down = GPIO.PUD_DOWN)     #pino sensor 3
GPIO.setup(4, GPIO.IN, pull_up_down = GPIO.PUD_DOWN)  #pino sensor 4
GPIO.setup(17, GPIO.IN, pull_up_down = GPIO.PUD_DOWN) #pino sensor 5
GPIO.setup(27, GPIO.IN, pull_up_down = GPIO.PUD_DOWN) #pino sensor 6
GPIO.setup(22, GPIO.IN, pull_up_down = GPIO.PUD_DOWN) #pino sensor 7
GPIO.setup(10, GPIO.IN, pull_up_down = GPIO.PUD_DOWN)   #pino sensor 8
GPIO.setup(9, GPIO.IN, pull_up_down = GPIO.PUD_DOWN)      #pino sensor 9
GPIO.setup(19, GPIO.IN, pull_up_down = GPIO.PUD_DOWN) #pino master
GPIO.setup(12, GPIO.OUT) #pino buzzer


pin_Master = 19
pin_1 = 26
pin_2 = 20
pin_3 = 21
pin_4 = 4
pin_5 = 17
pin_6 = 27
pin_7 = 22
pin_8 = 10
pin_9 = 9


class MainLayout(FloatLayout):
    pass 

class bar(Widget):
    r = NumericProperty(1)
    g = NumericProperty(0)

    def __init__(self, pin, p1, p2, **kwargs):
        super(bar, self).__init__(**kwargs)
        self.pin = pin
        self.p1  = p1
        self.p2  = p2
        self.pin_Buzzer = 12
        Clock.schedule_interval(self.update, 1.0 / 60.0)

    def update(self, dt):
        self.canvas.clear()
        if  self.read_SensorGeral(self.pin) == True:
            with self.canvas:
                Color(self.g, 1, 0, 1)
                Rectangle(pos=(self.p1,self.p2), size=(35,300))
            GPIO.output(12, 0)
        else:
            with self.canvas:
                Color(self.r, 0, 0, 1)
                Rectangle(pos=(self.p1,self.p2), size=(35,30))
            GPIO.output(12, 1)
    def read_Sensor(self, pin):
        sensor = GPIO.wait_for_edge(pin, GPIO.BOTH, timeout=200)                                                                   
        if sensor is None:
            return False
        else:
            return True

    def read_SensorGeral(self, pin):
        sensor = GPIO.wait_for_edge(pin, GPIO.BOTH, timeout=200)                                                                   
        if sensor is None:
            return False
        else:
            return True

    class MainApp(App):
        def build(self):
            Window.clearcolor = (1, 1, 1, 1)
            self.mainlayout = Widget()
            barGeral = bar(pin_Master, 26, 100)
            bar1 = bar(pin_1, 26, 30)
            bar2 = bar(pin_2, 106, 30)
            bar3 = bar(pin_3, 186, 30)
            bar4 = bar(pin_4, 266, 30)
            bar5 = bar(pin_5, 346, 30)
            bar6 = bar(pin_6, 426, 30)
            bar7 = bar(pin_7, 506, 30)
            bar8 = bar(pin_8, 586, 30)
            bar9 = bar(pin_9, 666, 30)

            self.mainlayout.add_widget(barGeral)
            self.mainlayout.add_widget(bar1)
            self.mainlayout.add_widget(bar2)
            self.mainlayout.add_widget(bar3)
            self.mainlayout.add_widget(bar4)
            self.mainlayout.add_widget(bar5)
            self.mainlayout.add_widget(bar6)
            self.mainlayout.add_widget(bar7)
            self.mainlayout.add_widget(bar8)
            self.mainlayout.add_widget(bar9)
            return self.mainlayout
    try:
        if __name__ == '__main__':
            MainApp().run()

    except KeyboardInterrupt:
        print("Programa finalizado!")
        GPIO.cleanup()

Answer 1

像这样更改您的更新，以使您的条件正确：

def update(self, dt):
    self.canvas.clear()
    if  self.read_SensorGeral(self.pin) == True:
        with self.canvas:
            Color(self.g, 1, 0, 1)
            Rectangle(pos=(self.p1,self.p2), size=(35,300))
        if not self.read_Sensor(self.pin):
            GPIO.output(12, 1)
    else:
        with self.canvas:
            Color(self.r, 0, 0, 1)
            Rectangle(pos=(self.p1,self.p2), size=(35,30))
        GPIO.output(12, 0)

可能还有另一个问题。每秒运行update()60次，但允许pin超时200次。这意味着您有几个update()线程同时运行。这可能会产生意想不到的结果。
也许你应该把更新作为一个循环，每个线程一个条。像这样：

from thread import start_new_thread



class bar(Widget):
    r = NumericProperty(1)
    g = NumericProperty(0)

    def __init__(self, pin, p1, p2, **kwargs):
        super(bar, self).__init__(**kwargs)
        self.pin = pin
        self.p1  = p1
        self.p2  = p2
        self.pin_Buzzer = 12

        start_new_thread(self.update())


    def update(self):
        self.canvas.clear()
        if  self.read_SensorGeral(self.pin) == True:
            with self.canvas:
                Color(self.g, 1, 0, 1)
                Rectangle(pos=(self.p1,self.p2), size=(35,300))
            if not self.read_Sensor(self.pin):
                GPIO.output(12, 1)
        else:
            with self.canvas:
                Color(self.r, 0, 0, 1)
                Rectangle(pos=(self.p1,self.p2), size=(35,30))
            GPIO.output(12, 0)

        time.sleep(10) # maybe a little time sleep between the updates
        self.update()

并在__init__方法中启动更新循环。self.update()