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• #5895 tomas01 aktív tag UsagiYojimbo #5891

  Új Válasz 2013-09-23 17:47:44 #5895

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  tomas01

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  válasz UsagiYojimbo #5891 üzenetére

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  # Define some device constants
  LCD_WIDTH = 16 # Maximum characters per line
  LCD_CHR = True
  LCD_CMD = False

  LCD_LINE_1 = 0x80 # LCD RAM address for the 1st line
  LCD_LINE_2 = 0xC0 # LCD RAM address for the 2nd line

  # Timing constants
  E_PULSE = 0.00005
  E_DELAY = 0.00005

  def main():
  # Main program block

  GPIO.setmode(GPIO.BCM) # Use BCM GPIO numbers
  GPIO.setup(LCD_E, GPIO.OUT) # E
  GPIO.setup(LCD_RS, GPIO.OUT) # RS
  GPIO.setup(LCD_D4, GPIO.OUT) # DB4
  GPIO.setup(LCD_D5, GPIO.OUT) # DB5
  GPIO.setup(LCD_D6, GPIO.OUT) # DB6
  GPIO.setup(LCD_D7, GPIO.OUT) # DB7

  GPIO.setup(NEXT, GPIO.IN) # Next Channel button
  GPIO.setup(PREV, GPIO.IN) # Previous Channel button

  # Initialise display
  lcd_init()
  # Send some test
  lcd_byte(LCD_LINE_1, LCD_CMD)
  lcd_string("Internet Radio",2)
  lcd_byte(LCD_LINE_2, LCD_CMD)
  lcd_string("+Timo+",2)

  time.sleep(4)
  os.system("mpc play")
  currstation = "NOSTATION"
  StartTime = datetime.datetime.now()
  Now = datetime.datetime.now()
  CrawlTime = 0

  while 1:
  if ( GPIO.input(NEXT) == True):
  os.system("mpc next")
  time.sleep(2)
  os.system("mpc play")
  if ( GPIO.input(PREV) == True):
  os.system("mpc prev")
  time.sleep(2)
  os.system("mpc play")

  f=os.popen("mpc current")
  station = ""
  for i in f.readlines():
  station += i

  if currstation != station:
  print("Different Station")
  currstation = station
  StartTime = datetime.datetime.now()
  maxLength = len(station)
  CurrPos = 19

  Now = datetime.datetime.now()
  PlayTime = Now-StartTime
  # Send some text
  #print("Current: " + station)
  lcd_byte(LCD_LINE_1, LCD_CMD)
  lcd_string(station,1)
  lcd_byte(LCD_LINE_2, LCD_CMD)
  #lcd_string("",1)

  if CrawlTime==17:
  lcd_string(station[CurrPos:],1)
  CurrPos = CurrPos + 1
  CrawlTime=0
  if CurrPos == maxLength:
  CurrPos = 0

  CrawlTime = CrawlTime + 1
  time.sleep(20)

  def lcd_init():
  # Initialise display
  lcd_byte(0x33,LCD_CMD)
  lcd_byte(0x32,LCD_CMD)
  lcd_byte(0x28,LCD_CMD)
  lcd_byte(0x0C,LCD_CMD)
  lcd_byte(0x06,LCD_CMD)
  lcd_byte(0x01,LCD_CMD)

  def lcd_string(message,style):
  # Send string to display
  # style=1 Left justified
  # style=2 Centred
  # style=3 Right justified

  if style==1:
  message = message.ljust(LCD_WIDTH," ")
  elif style==2:
  message = message.center(LCD_WIDTH," ")
  elif style==3:
  message = message.rjust(LCD_WIDTH," ")

  for i in range(LCD_WIDTH):
  lcd_byte(ord(message),LCD_CHR)

  def lcd_byte(bits, mode):
  # Send byte to data pins
  # bits = data
  # mode = True for character
  # False for command

  GPIO.output(LCD_RS, mode) # RS

  # High bits
  GPIO.output(LCD_D4, False)
  GPIO.output(LCD_D5, False)
  GPIO.output(LCD_D6, False)
  GPIO.output(LCD_D7, False)
  if bits&0x10==0x10:
  GPIO.output(LCD_D4, True)
  if bits&0x20==0x20:
  GPIO.output(LCD_D5, True)
  if bits&0x40==0x40:
  GPIO.output(LCD_D6, True)
  if bits&0x80==0x80:
  GPIO.output(LCD_D7, True)

  # Toggle 'Enable' pin
  time.sleep(E_DELAY)
  GPIO.output(LCD_E, True)
  time.sleep(E_PULSE)
  GPIO.output(LCD_E, False)
  time.sleep(E_DELAY)

  # Low bits
  GPIO.output(LCD_D4, False)
  GPIO.output(LCD_D5, False)
  GPIO.output(LCD_D6, False)
  GPIO.output(LCD_D7, False)
  if bits&0x01==0x01:
  GPIO.output(LCD_D4, True)
  if bits&0x02==0x02:
  GPIO.output(LCD_D5, True)
  if bits&0x04==0x04:
  GPIO.output(LCD_D6, True)
  if bits&0x08==0x08:
  GPIO.output(LCD_D7, True)

  # Toggle 'Enable' pin
  time.sleep(E_DELAY)
  GPIO.output(LCD_E, True)
  time.sleep(E_PULSE)
  GPIO.output(LCD_E, False)
  time.sleep(E_DELAY)

  if __name__ == '__main__':
  main()

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