.png)
.png)
The HD44780 is the primary chip for a 16 character x 2 or 20 x 4 line LCD display.
These small displays can be found cheap online and are easy to use with a device with an I2C bus master.
Example code (from branch develop):
#file : Hd44780.py (github)
################################################################# # Example Code # ################################################################# ################################################################# # First start your I2C Bus Master Device # ################################################################# # If your using the Arduino Nano, comment out this line and # uncomment the ArDuino Nano lines raspi = runtime.start("raspi","RasPi") ################################################################# # Start the Arduino Nano connected using /dev/ttyUSB0 # ################################################################# #arduinoNano = runtime.start("arduinoNano","Arduino") #arduinoNano.setBoardNano() #arduinoNano.connect("/dev/ttyUSB0") ################################################################# # Next start the PCF8574 service # ################################################################# pcf = runtime.start("pcf","Pcf8574") # Then attach it to the I2C Bus Master # When attaching, we specify the Bus Master Device, # the I2C Bus Number # and the I2C address pcf.setBus("1") pcf.setAddress("0x27") pcf.attach(raspi) #pcf.attach(arduinoNano,"0","0x27") ################################################################# # Next start the Hd44780 service # ################################################################# lcd = runtime.start("lcd","Hd44780") # Once the service has been started, we need to attach it to # the PCF service lcd.attach(pcf) # this will initalise the display. # not needed now unless you want to manually reset # lcd.reset() # when we want to clear the screen call this lcd.clear() # You can turn the backlight on or off. # True will turn it on, False will turn it off. lcd.setBackLight(True) # Filally to send text to the display lcd.display("Hello World", 0)
Example configuration (from branch develop):
#file : Hd44780.py (github)
!!org.myrobotlab.service.config.Hd44780Config backlight: true controller: null delay: null listeners: null peers: null type: Hd44780
