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remotecontrol.py
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remotecontrol.py
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import smbus, time, threading, lcddriver, json
# PCF8591
ADDRESS = 0x48
class Control:
currentValue = None
bus = None
address = None;
onUpdate = None
onChange = None
def __init__(self, bus, address, onUpdate, onChange):
self.bus = bus
self.address = address
self.onUpdate = onUpdate
self.onChange = onChange
def update(self):
self.bus.read_byte_data(ADDRESS, self.address)
newValue = self.bus.read_byte_data(ADDRESS, self.address)
normalizedNewValue = 0 if newValue <= 2 else (255 if newValue >= 253 else newValue)
relativeValue = (255.0 - normalizedNewValue) / 255.0
if (self.currentValue is not None and abs(newValue - self.currentValue) > 5):
self.onChange(relativeValue)
self.currentValue = newValue
if (self.currentValue is None):
self.currentValue = newValue
if (self.onUpdate is not None):
self.onUpdate(relativeValue)
class RemoteControl:
bus = None
player = None
volume = None;
bass = None;
treble = None;
presets = None;
lcdSecondLine = 'Welcome';
lcdAltSecondLine = None;
previousOffset = None;
lcdTimeout = time.time() + 10;
def __init__(self, player):
self.player = player;
self.bus = smbus.SMBus(1)
self.volume = Control(self.bus, 0x41, self.player.setVolume, self.onChangeVolume)
self.bass = Control(self.bus, 0x42, self.onUpdateBass, self.onChangeBass)
self.treble = Control(self.bus, 0x40, self.onUpdateTreble, self.onChangeTreble)
self.presets = Control(self.bus, 0x43, None, self.onChangePreset)
readThread = threading.Thread(target=self.readValues)
readThread.daemon = True
readThread.start()
updateLcdThread = threading.Thread(target=self.updateLcd)
updateLcdThread.daemon = True
updateLcdThread.start()
def readValues(self):
while True:
try:
self.volume.update()
self.treble.update()
self.bass.update()
self.presets.update()
time.sleep(0.1)
except Exception as e:
print e
pass
def updateLcd(self):
lcd = lcddriver.lcd()
while True:
if (time.time() + 8 > self.lcdTimeout and self.lcdAltSecondLine is not None):
self.lcdSecondLine = self.lcdAltSecondLine
if (time.time() < self.lcdTimeout):
lcd.lcd_backlight("on")
lcd.lcd_display_string(time.ctime(), 1)
lcd.lcd_display_string(self.lcdSecondLine, 2)
if (time.time() > self.lcdTimeout):
lcd.lcd_backlight("off")
time.sleep(0.25)
def onChangeBass(self, level):
self.lcdSecondLine = ("Bass: " + str(int(-24.0 + 36.0 * level)) + " dB").ljust(16)
self.lcdTimeout = time.time() + 12;
def onUpdateBass(self, level):
self.player.setBass(-24.0 + 36.0 * level)
def onChangeTreble(self, level):
self.lcdSecondLine = ("Treble: " + str(int(-24.0 + 36.0 * level)) + " dB").ljust(16)
self.lcdTimeout = time.time() + 12;
def onUpdateTreble(self, level):
self.player.setTreble(-24.0 + 36.0 * level)
def onChangePreset(self, level):
with open('static/radiopresets.json') as data_file:
data = json.load(data_file)
offset = int(level * len(data));
self.lcdTimeout = time.time() + 10;
if (offset is not self.previousOffset and offset == 0):
self.player.pause();
self.lcdSecondLine = "Pause".ljust(16)
self.lcdAltSecondLine = None
elif (offset is not self.previousOffset):
selected = data[offset - 1];
self.play(selected["name"], selected["url"])
else:
self.lcdTimeout = time.time() + 10
self.previousOffset = offset;
def play(self, name, url):
self.lcdSecondLine = name.rjust(16)
self.lcdAltSecondLine = self.lcdSecondLine
self.player.play(url)
self.lcdTimeout = time.time() + 10;
def onChangeVolume(self, level):
self.lcdSecondLine = ("Volume: " + str(int(100.0 * level)) + "%").ljust(16)
self.lcdTimeout = time.time() + 12;