time.sleep(0.2)
lcd_addr = -1
if ablib.existI2Cdevice(0, 0x27):
print "PCF8474T"
lcd_addr = 0x27
if ablib.existI2Cdevice(0, 0x3F):
print "PCF8474AT"
lcd_addr = 0x3F
if lcd_addr == -1:
continue
try:
lcd = ablib.Daisy24(0, lcd_addr)
if lcd_addr == 0x27:
lcd.putstring("Daisy-24 (T)")
if lcd_addr == 0x3F:
lcd.putstring("Daisy-24 (AT)")
if lcd.pressed(0):
lcd.setcurpos(0, 1)
lcd.putstring("Key 0 pressed")
lcd.backlighton()
time.sleep(1)
lcd.backlightoff()
if lcd.pressed(1):
lcd.setcurpos(0, 1)
import ablib
import time
#Daisy-24 I/O expander chip address. Use:
#0x27 for PCF8474 T
#0x3F for PCF8474 AT
LCD_ADDRESS = 0x27
while True:
try:
lcd = ablib.Daisy24(0, LCD_ADDRESS)
lcd.putstring("Test Daisy-24")
except:
continue
if lcd.pressed(0):
lcd.setcurpos(0, 1)
lcd.putstring("Key 0 pressed")
lcd.backlighton()
time.sleep(1)
lcd.backlightoff()
if lcd.pressed(1):
lcd.setcurpos(0, 1)
lcd.putstring("Key 1 pressed")
lcd.backlighton()
time.sleep(1)
lcd.backlightoff()
if lcd.pressed(2):
import ablib
import time
#Check for Daisy-24 address
if ablib.existI2Cdevice(0, 0x27):
i2c_address = 0x27
else:
i2c_address = 0x3F
lcd = ablib.Daisy24(0, i2c_address)
lcd.backlighton()
lcd.putstring("Hello World !")
while True:
i = 0
while i < 10:
i += 1
lcd.setcontrast(i)
time.sleep(0.1)
while i > 0:
i -= 1
lcd.setcontrast(i)
time.sleep(0.1)
import ablib
import time
lcd = ablib.Daisy24(0)
lcd.backlighton()
lcd.putstring("Hello World !")
while True:
i=0
while i<10:
i+=1
lcd.setcontrast(i)
time.sleep(0.1)
while i>0:
i-=1
lcd.setcontrast(i)
time.sleep(0.1)
