1st commit

button.py

@@ -0,0 +1,62 @@
+#!/usr/bin/env python2.7  
+  
+import time
+import RPi.GPIO as GPIO  
+from time import sleep     # this lets us have a time delay (see line 12)  
+  
+GPIO.setmode(GPIO.BCM)     # set up BCM GPIO numbering  
+#GPIO.setup(20, GPIO.IN)    # set GPIO25 as input (button)  
+#GPIO.setup(20, GPIO.IN, pull_up_down = GPIO.PUD_UP)
+
+class Button:
+   	'Handle button stuff'
+	starttime=0
+	ispushed=0
+	waspushed=0
+	presstime=0
+	ignore=0
+
+	def __init__(self, gpio):
+		print "initialize button on gpio %d"%gpio
+		self.gpio = gpio
+		GPIO.setup(self.gpio, GPIO.IN, pull_up_down = GPIO.PUD_UP)
+		GPIO.add_event_detect(self.gpio, GPIO.BOTH, callback=self.my_callback)  
+		self.presstime=0
+		self.starttime=0
+		self.presstime=0
+		self.waslong=0
+	
+	def my_callback(self,channel):  
+    		if not GPIO.input(channel):     # button is pressed
+#       			print "[press] on %d"%self.gpio
+			self.starttime=time.time()
+			self.ispushed=1
+    		else:          			# button released
+			self.presstime=time.time()-self.starttime
+#			print "[release] on %d  /  <pressed> for=%f sconds"%(self.gpio,self.presstime)
+			if self.ispushed:
+				self.waspushed=1
+				self.ispushed=0
+
+	def WasPressed(self):
+		if self.waspushed:
+			self.waspushed=0
+			return 1
+    		elif self.ispushed:
+			self.presstime=time.time()-self.starttime
+			if self.presstime > 2:
+				self.ispushed=0
+				self.waspushed=1
+				self.waslong=1
+			
+		else:
+			return 0
+
+	def WasLong(self):
+		if self.presstime > 2:
+			self.waslong=0
+			self.ignore=1
+			return 1
+		else:
+			return 0
+