X-Git-Url: https://git.ralfj.de/saartuer.git/blobdiff_plain/6e7d90d419547705cb125adc7fe3626d9dc0fd49..83d646a505bed8c75eef15855da7046e5854106d:/ringd

diff --git a/ringd b/ringd
index 812043a..201322f 100755
--- a/ringd
+++ b/ringd
@@ -1,36 +1,99 @@
 #!/usr/bin/python3
-import time, socket
+import time, socket, atexit
+import queue, threading, select
+from libtuer import log
 import RPi.GPIO as GPIO
+GPIO.setmode(GPIO.BOARD)
+atexit.register(GPIO.cleanup)
 
 tuerSock = "/run/tuer.sock"
-
 ringPin = 18
 
-GPIO.setmode(GPIO.BOARD)
-GPIO.setup(ringPin, GPIO.IN)
-
-lastEvent = 0
-
+# Main classes
+class PinWatcher():
+	def __init__(self, pin, histlen):
+		GPIO.setup(pin, GPIO.IN)
+		assert histlen > 1 # otherwise our logic goes nuts...
+		self._pin = pin
+		self._histlen = histlen
+		# state change detection
+		self._state = None
+		self._newstate = None # != None iff we are currently seeing a state change
+		self._newstatelen = 0 # only valid if newstate != None
+		# start state change handler thread
+		self._q = queue.Queue()
+		self._t = threading.Thread(target=self.queue_consumer)
+		self._t.start()
+	
+	def queue_consumer(self):
+		while True:
+			el = self._q.get()
+			if el is None: return # we are supposed to terminate
+			# handle the state change
+			(oldstate, newstate) = el
+			self.callback(oldstate, newstate)
+	
+	def read(self):
+		curstate = GPIO.input(self._pin)
+		assert curstate in (0, 1)
+		if curstate != self._state:
+			# the state is about to change
+			if curstate == self._newstate:
+				# we already saw this new state
+				self._newstatelen += 1
+				if self._newstatelen >= self._histlen:
+					self._q.put((self._state, curstate)) # send stuff to the other thread
+					self._state = curstate
+					self._newstate = None
+			else:
+				# now check for how long we see this new state
+				self._newstate = curstate
+				self._newstatelen = 1
+		else:
+			# old state is preserved
+			self._newstate = None
+	
+	def quit(self):
+		self._q.put(None)
+		self._t.join()
 
-while True:
-	GPIO.wait_for_edge(ringPin, GPIO.BOTH)
-	# measure time since event
-	now = time.time()
-	timePassed = now-lastEvent
-	print("Time between events %f" % timePassed)
-	# remember, remember
-	lastEvent = now
-	# action to be taken?
-	if timePassed >= 1.5 and timePassed <= 3:
-		print("Opening door")
+class RingWatcher(PinWatcher):
+	def __init__(self):
+		super().__init__(ringPin, 2)
+		self.last1Event = None
+	
+	def callback(self, oldstate, newstate):
+		if oldstate is None:
+			return # ignore the very first state change
+		# now (oldstate, newstate) is either (0, 1) or (1, 0)
+		if newstate:
+			self.last1Event = time.time()
+		elif self.last1Event is not None:
+			# how long was this pressed?
+			timePressed = time.time() - self.last1Event
+			log("Ring button pressed for",timePressed)
+			if timePressed >= 1.5 and timePressed <= 3:
+				self.buzz()
+	
+	def buzz(self):
+		log("Opening door")
 		# talk with tuerd
 		s = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
 		s.connect(tuerSock)
 		s.send(b'buzz')
-		data = s.recv(4)
 		s.close()
-		print("...done")
-		if data != b'1':
-			print("Received unexpected answer %s" % str(data))
 
-GPIO.cleanup()
+# MAIN PROGRAM
+pins = [
+	RingWatcher(),
+]
+
+try:
+	log("entering loop")
+	while True:
+		for pin in pins:
+			pin.read()
+		time.sleep(0.02)
+except KeyboardInterrupt:
+	for pin in pins:
+		pin.quit()