example.py

# Example on usage of the HD44780 module

# Pin Code    Description         Do what with it
# -------------------------------------------------------------------
# 1   VSS     GND                 Ground it
# 2   VDD     +5V                 5V please
# 3   V0      Contrast (0-5V)*    Stick to 0V if you don't have a pot
# 4   RS      Register select     Connect to pyboard, 0 in array
# 5   R/W     Read/write          Ground it
# 6   E       Enable              Connect to pyboard, 1 in array
# 7   DB0     Data Bit 0          Unused
# 8   DB1     Data Bit 1          Unused
# 9   DB2     Data Bit 2          Unused
# 10  DB3     Data Bit 3          Unused
# 11  DB4     Data Bit 4          Connect to pyboard, 2 in array
# 12  DB5     Data Bit 5          Connect to pyboard, 3 in array
# 13  DB6     Data Bit 6          Connect to pyboard, 4 in array
# 14  DB7     Data Bit 7          Connect to pyboard, 5 in array
# 15  A       Backlight +someV    My display is LED, I use 3.3V
# 16  K       Backlight GND       Ground it


import pyb
from lcd import HD44780

def lcd_fun():
    # Main program block
    lcd = HD44780()

    # Pins 0-5 as above
    lcd.PINS = ['Y1','Y2','Y3','Y4','Y5','Y6']

    # Initialise display
    lcd.init()

    # Use it
    lcd.set_line(0) # First line
    lcd.set_string("ABCDEFGHIJKLMNOP") # Send a string
    lcd.set_line(1) # Second line
    lcd.set_string("1234567890123456") # Again

    pyb.delay(3000) # 3 second delay

    # Send some more
    lcd.set_line(0)
    lcd.set_string("*micropython-lcd")
    lcd.set_line(1)
    lcd.set_string("github.com/wjdp")

    pyb.delay(3000)

    # Done
    lcd.clear()