A simple class for controlling the HD44780 in 4 bit mode with the micropython pyboard.
There are no external dependences, the only module we use is the pyboard's
pyb.
Micropython Forum thread: http://forum.micropython.org/viewtopic.php?f=2&t=354
import pyb
from lcd import HD44780
lcd = HD44780()
lcd.PINS = ['Y1','Y2','Y3','Y4','Y5','Y6']
lcd.init()
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
lcd.clear() # Clear the display
Hookup your LCD like the following.
| 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 |
Then the pinout array looks like this
PINS = ['Y1','Y2','Y3','Y4','Y5','Y6']