Added buttons, fixed bugs

buttons.py

@@ -0,0 +1,43 @@
+import RPi.GPIO as GPIO
+import time
+
+# This class will send commands to MPD client from buttons
+class buttons():
+	# Class constructor
+	# Buttons pins is a dictionary with button_name=>pin_number format
+	def __init__(self, button_pins, bounce_time):
+		# Set bounce time
+		self.bounce_time = bounce_time
+
+		# Set buttons
+		self.buttons = button_pins
+
+		# Set GPIO numbering mode
+		GPIO.setmode(GPIO.BOARD)
+
+		# We don't need warnings from GPIO
+		GPIO.setwarnings(False)
+
+		# Set button GPIO pins as inputs and enable interrupts
+		for button in button_pins:
+			if (button_pins[button] != False):
+				GPIO.setup(button_pins[button], GPIO.IN, pull_up_down = GPIO.PUD_UP)
+				GPIO.add_event_detect(button_pins[button], GPIO.FALLING, callback=self.button_pressed, bouncetime=self.bounce_time)
+
+		# Initalize MPD
+		self.mpd = False
+
+	# Register MPD client to send it commands
+	def register(self, mpd):
+		self.mpd = mpd
+
+	def button_pressed(self, channel):
+		# Debouncing
+		time.sleep(0.05)
+		if (GPIO.input(channel) == 0):
+			# Find out which button was pressed
+			for button in self.buttons:
+				if (channel == self.buttons[button]):					
+					# Send command to MPD client
+					if (self.mpd != False):
+						self.mpd.commands(button.replace('_BUTTON', ''))

mpd_client.py

@@ -115,7 +115,42 @@ def toUpper(self, data):
 
 		# Return joined list
 		return " ".join(lst)
+
+	# This function is called by buttons to give commands to MPD
+	def commands(self, command):
+		if (command == 'PLAY'):
+			if (self.data['state'] == 1):
+				self.cmd_client.pause(1)
+			else:
+				self.cmd_client.play()
+
+		elif (command == 'STOP'):
+			self.cmd_client.stop()
+
+		elif (command == 'NEXT'):
+			self.cmd_client.next()
+
+		elif (command == 'PREV'):
+			self.cmd_client.previous()
 
+		elif (command == 'VDN'):
+			# Get volume value
+			vol = self.data['volume'] - 5
+
+			if (vol < 0):
+				vol = 0
+
+			self.cmd_client.setvol(vol)
+
+		elif (command == 'VUP'):
+			# Get volume value
+			vol = self.data['volume'] + 5
+
+			if (vol > 100):
+				vol = 100
+
+			self.cmd_client.setvol(vol)
+
 	# Function for updating data
 	# Returns which option has been changed (shuffle - 0, repeat all - 1, repeat single - 2, nothing changed - -1)
 	def updateData(self):

start.py

@@ -1,4 +1,4 @@
-import i2c_display, mpd_client, ir_remote, time
+import i2c_display, mpd_client, ir_remote, time, buttons
 
 #########  MPD PARAMETERS  ##############
 # Only if you know what you're doing! 	#
@@ -8,7 +8,17 @@
 CON_ID = {'host':HOST, 'port':PORT}		#
 #########################################
 
-display = i2c_display.i2c_display(0x27, 2, 16, 5, 0.1);
+# Buttons - put to False if don't want to use it
+button_pins = {
+	'PLAY_BUTTON': 8,
+	'NEXT_BUTTON': 10,
+	'PREV_BUTTON': 11,
+	'VDN_BUTTON': 12,
+	'VUP_BUTTON': 13,
+	'STOP_BUTTON': 15
+}
+
+display = i2c_display.i2c_display(0x27, 4, 20, 5, 0.1);
 mpdcl = mpd_client.mpd_client(CON_ID, PASSWORD)
 remote = ir_remote.remote("/tmp/irpipe")
 
@@ -17,10 +27,10 @@
 remote.register_display(display)
 display.start()
 remote.start()
+btn = buttons.buttons(button_pins, 200)
+btn.register(mpdcl)
 mpdcl.mpdMain()
 
-print "test"
-
 '''display.start()
 
 time.sleep(5)