usr/bin/dispprogress

   1 #!/usr/bin/python
   2 import time
   3 import sys
   4 import RPi.GPIO as GPIO
   5 GPIO.setwarnings(False)
   6
   7 # Zuordnung der GPIO Pins (ggf. anpassen)
   8 DISPLAY_RS = 7
   9 DISPLAY_E  = 8
  10 DISPLAY_DATA4 = 25
  11 DISPLAY_DATA5 = 24
  12 DISPLAY_DATA6 = 23
  13 DISPLAY_DATA7 = 18
  14
  15 DISPLAY_WIDTH = 16      # Zeichen je Zeile
  16 DISPLAY_LINE_1 = 0x80   # Adresse der ersten Display Zeile
  17 DISPLAY_LINE_2 = 0xC0
  18
  19 DISPLAY_CHR = True
  20 DISPLAY_CMD = False
  21 E_PULSE = 0.0005
  22 E_DELAY = 0.0005
  23
  24 def main():
  25         GPIO.setmode(GPIO.BCM)
  26         GPIO.setup(DISPLAY_E, GPIO.OUT)
  27         GPIO.setup(DISPLAY_RS, GPIO.OUT)
  28         GPIO.setup(DISPLAY_DATA4, GPIO.OUT)
  29         GPIO.setup(DISPLAY_DATA5, GPIO.OUT)
  30         GPIO.setup(DISPLAY_DATA6, GPIO.OUT)
  31         GPIO.setup(DISPLAY_DATA7, GPIO.OUT)
  32
  33         display_init()
  34
  35         #lcd_byte(DISPLAY_LINE_1, DISPLAY_CMD)
  36         #lcd_string("Luftinte")
  37         #lcd_byte(DISPLAY_LINE_2, DISPLAY_CMD)
  38         #lcd_string("rnet!")
  39         while (1):
  40                 lcd_byte(0x0e, DISPLAY_CMD)#enable cursor
  41                 lcd_byte(0x02, DISPLAY_CMD)#put cursor to the left
  42                 lcd_byte(DISPLAY_LINE_1 - 1, DISPLAY_CMD)
  43                 for i in range (0, 8):
  44                         lcd_byte (0x14, DISPLAY_CMD)#advance cursor
  45                         time.sleep (0.5)
  46                 lcd_byte(DISPLAY_LINE_2 - 1, DISPLAY_CMD)
  47                 for i in range (0,8):
  48                         lcd_byte(0x14, DISPLAY_CMD)
  49                         time.sleep(0.5)
  50                 break
  51                 lcd_byte(0x0f, DISPLAY_CMD) #cursor blinky (als lade-anim)
  52                 lcd_byte (33, DISPLAY_CMD)
  53
  54         #if len (sys.argv) > 1:
  55         #       mystring = sys.argv[1].ljust (8, " ")
  56         #       lcd_byte (DISPLAY_LINE_1, DISPLAY_CMD)
  57         #       lcd_string (mystring[0:8])
  58         #       lcd_byte (DISPLAY_LINE_2, DISPLAY_CMD)
  59         #       lcd_string (mystring[8:16])
  60
  61
  62 def display_init():
  63         lcd_byte(0x33,DISPLAY_CMD)
  64         lcd_byte(0x32,DISPLAY_CMD)
  65         lcd_byte(0x28,DISPLAY_CMD)
  66         #lcd_byte(0x0C,DISPLAY_CMD)  #cursor off
  67         lcd_byte(0x06,DISPLAY_CMD)
  68         #lcd_byte(0x01,DISPLAY_CMD)   #clear
  69
  70 def lcd_string(message):
  71         message = message.ljust(DISPLAY_WIDTH," ")
  72         for i in range(DISPLAY_WIDTH):
  73           lcd_byte(ord(message[i]),DISPLAY_CHR)
  74
  75 def lcd_byte(bits, mode):
  76         GPIO.output(DISPLAY_RS, mode)
  77         GPIO.output(DISPLAY_DATA4, False)
  78         GPIO.output(DISPLAY_DATA5, False)
  79         GPIO.output(DISPLAY_DATA6, False)
  80         GPIO.output(DISPLAY_DATA7, False)
  81         if bits&0x10==0x10:
  82           GPIO.output(DISPLAY_DATA4, True)
  83         if bits&0x20==0x20:
  84           GPIO.output(DISPLAY_DATA5, True)
  85         if bits&0x40==0x40:
  86           GPIO.output(DISPLAY_DATA6, True)
  87         if bits&0x80==0x80:
  88           GPIO.output(DISPLAY_DATA7, True)
  89         time.sleep(E_DELAY)
  90         GPIO.output(DISPLAY_E, True)
  91         time.sleep(E_PULSE)
  92         GPIO.output(DISPLAY_E, False)
  93         time.sleep(E_DELAY)
  94         GPIO.output(DISPLAY_DATA4, False)
  95         GPIO.output(DISPLAY_DATA5, False)
  96         GPIO.output(DISPLAY_DATA6, False)
  97         GPIO.output(DISPLAY_DATA7, False)
  98         if bits&0x01==0x01:
  99           GPIO.output(DISPLAY_DATA4, True)
 100         if bits&0x02==0x02:
 101           GPIO.output(DISPLAY_DATA5, True)
 102         if bits&0x04==0x04:
 103           GPIO.output(DISPLAY_DATA6, True)
 104         if bits&0x08==0x08:
 105           GPIO.output(DISPLAY_DATA7, True)
 106         time.sleep(E_DELAY)
 107         GPIO.output(DISPLAY_E, True)
 108         time.sleep(E_PULSE)
 109         GPIO.output(DISPLAY_E, False)
 110         time.sleep(E_DELAY)
 111
 112 if __name__ == '__main__':
 113         main()
 114