initial commit

menu_switch_class.py

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+#!/usr/bin/env python
+#
+# $Id: menu_switch_class.py,v 1.2 2016/05/08 11:57:31 bob Exp $
+# Raspberry Retro Pi Internet Radio
+# Retro radio menu switch
+#
+# Author : Bob Rathbone
+# Site   : http://www.bobrathbone.com
+#
+# License: GNU V3, See https://www.gnu.org/copyleft/gpl.html
+#
+
+import RPi.GPIO as GPIO
+import time
+
+
+# Status LED class
+class MenuSwitch:
+	# Status settings
+	CLEAR = 0
+	VALUE1 = 1
+	VALUE2 = 2
+	VALUE4  = 4 
+	switch1 = None
+	switch2 = None
+	switch4 = None
+
+	def __init__(self, switch1, switch2, switch4,callback):
+		self.switch1 = switch1
+		self.switch2 = switch2
+		self.switch4 = switch4
+		self.callback = callback
+
+		# Set up switch lines
+		GPIO.setmode(GPIO.BCM)
+		GPIO.setwarnings(False)
+
+		GPIO.setup(self.switch1, GPIO.IN, pull_up_down=GPIO.PUD_UP)
+		GPIO.setup(self.switch2, GPIO.IN, pull_up_down=GPIO.PUD_UP)
+		GPIO.setup(self.switch4, GPIO.IN, pull_up_down=GPIO.PUD_UP)
+
+		# Add event detection to the GPIO inputs
+		GPIO.add_event_detect(self.switch1, GPIO.BOTH, callback=self.callback, bouncetime=100)
+		GPIO.add_event_detect(self.switch2, GPIO.BOTH, callback=self.callback, bouncetime=100)
+		GPIO.add_event_detect(self.switch4, GPIO.BOTH, callback=self.callback, bouncetime=100)
+                return
+
+	# Get switch state
+	def get(self):
+		value = 0
+		if not GPIO.input(self.switch1): 
+			value  += 1
+		if not GPIO.input(self.switch2): 
+			value  += 2
+		if not GPIO.input(self.switch4): 
+			value  += 4
+		return value
+
+
+if __name__ == "__main__":
+
+	switch_value = 0 
+
+	def menu_swich_event(switch):
+		global switch_value
+		time.sleep(0.1)
+		value = menu_switch.get()
+		if value != switch_value:
+			print "Switch", switch,"Value =", value
+			switch_value = value
+		return
+
+	menu_switch = MenuSwitch(24,8,7,menu_swich_event)
+	switch_value = menu_switch.get()
+
+	while True:
+		time.sleep(0.1)
+
+# End of class