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import RPi.GPIO as GPIO
import sys
import time

sys.setrecursionlimit(100000)

GPIO.setmode(GPIO.BCM)
GPIO.setup(21, GPIO.IN, pull_up_down=GPIO.PUD_DOWN)

count=0

def call_count(n):
        global count
        count+=1

try:
    while 1:
    	GPIO.add_event_detect(21, GPIO.RISING)
	GPIO.add_event_callback(21, call_count)
        time.sleep(1)
        GPIO.remove_event_detect(21)
        print count
        count=0
        GPIO.add_event_detect(21, GPIO.RISING)
        GPIO.add_event_callback(21, call_count)
except KeyboardInterrupt:
    GPIO.cleanup()

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    while True:
        counter.count = 0
        time.sleep(1)
        print(counter.count)

Code: Alles auswählen

#!/usr/bin/env python3
import time
from threading import RLock

from RPi import GPIO

PIN_NUMBER = 21


class Counter:
    
    def __init__(self, pin_number):
        self.lock = RLock()
        self._count = 0
        GPIO.setup(pin_number, GPIO.IN, pull_up_down=GPIO.PUD_DOWN)
        GPIO.add_event_detect(pin_number, GPIO.RISING)
        GPIO.add_event_callback(pin_number, self.increase_count)
    
    @property
    def count(self):
        return self._count
    
    @count.setter
    def count(self, value):
        with self.lock:
            self._count = value
    
    def increase_count(self, _channel=None):
        with self.lock:
            self.count += 1
        

def main():
    GPIO.setmode(GPIO.BCM)

    try:
        counter = Counter(PIN_NUMBER)
        while True:
            counter.count = 0
            time.sleep(1)
            print(counter.count)
    except KeyboardInterrupt:
        pass
    finally:
        GPIO.cleanup()


if __name__ == '__main__':
    main()

Code: Alles auswählen

#!/usr/bin/env python3
import time
from RPi import GPIO

PIN_NUMBER = 21

class Counter:
    def __init__(self, pin_number):
        self._reset_count = 0
        self._count = 0
        GPIO.setup(pin_number, GPIO.IN, pull_up_down=GPIO.PUD_DOWN)
        GPIO.add_event_detect(pin_number, GPIO.RISING)
        GPIO.add_event_callback(pin_number, self.increase_count)
    
    @property
    def count(self):
        return self._count - self._reset_count
    
    def reset(self):
        self._reset_count = self._count
    
    def increase_count(self, _channel=None):
        self._count += 1

def main():
    GPIO.setmode(GPIO.BCM)
    try:
        counter = Counter(PIN_NUMBER)
        while True:
            counter.reset()
            time.sleep(1)
            print(counter.count)
    except KeyboardInterrupt:
        pass
    finally:
        GPIO.cleanup()

if __name__ == '__main__':
    main()