Module GPIO.lcd-hd44780
Lua module to use a hd44780 compatible LCD display with the Raspberry Pi GPIO interface.
based on code from lrvick, LiquidCrystal and Adafruit
lrvic - https://github.com/lrvick/raspi-hd44780/blob/master/hd44780.py
LiquidCrystal - https://github.com/arduino/Arduino/blob/master/libraries/LiquidCrystal/LiquidCrystal.cpp
Adafruit - https://github.com/adafruit/Adafruit-Raspberry-Pi-Python-Code/blob/master/AdafruitCharLCD/AdafruitCharLCD.py
Info:
- Copyright: (c); Adafruit for the Python library, Thijs Schreijer for the Lua migration
Functions
| delayMicroseconds (microseconds) | This function will sleep for a number om micro (NOT milli!) seconds. |
| initialize (pin_rs, pin_e, pin_db) | Creates a new display object with its pin configuration. |
Functions
- delayMicroseconds (microseconds)
-
This function will sleep for a number om micro (NOT milli!) seconds.
On first call it will replace itself with a new implementation based on LuaSocket
or the OS. NOTE: the OS version is really slow!
Parameters:
- microseconds number of microseconds to sleep
- initialize (pin_rs, pin_e, pin_db)
-
Creates a new display object with its pin configuration.
Parameters:
- pin_rs pin number for rs (according to current pin numbering scheme)
- pin_e pin number for e (according to current pin numbering scheme)
- pin_db table/list with 4 pin numbers for data (according to current pin numbering scheme)
Returns:
-
New display object