def initLCD():
# Modify this if you have a different sized character LCD
lcd_columns = 16
lcd_rows = 2
# Raspberry Pi Pin Config:
lcd_rs = digitalio.DigitalInOut(board.D26) # pin 4
lcd_en = digitalio.DigitalInOut(board.D19) # pin 6
lcd_d7 = digitalio.DigitalInOut(board.D27) # pin 14
lcd_d6 = digitalio.DigitalInOut(board.D22) # pin 13
lcd_d5 = digitalio.DigitalInOut(board.D24) # pin 12
lcd_d4 = digitalio.DigitalInOut(board.D25) # pin 11
lcd_backlight = digitalio.DigitalInOut(board.D4)
red = digitalio.DigitalInOut(board.D21)
green = digitalio.DigitalInOut(board.D12)
blue = digitalio.DigitalInOut(board.D18)
# Initialise the LCD class
lcd = characterlcd.Character_LCD_RGB(lcd_rs, lcd_en, lcd_d4, lcd_d5, lcd_d6, lcd_d7, lcd_columns,
lcd_rows, red, green, blue, lcd_backlight)
return(lcd)
lcd_d5 = digitalio.DigitalInOut(board.D24) # pin 12
lcd_d4 = digitalio.DigitalInOut(board.D25) # pin 11
lcd_backlight = digitalio.DigitalInOut(board.D4)
red = digitalio.DigitalInOut(board.D21)
green = digitalio.DigitalInOut(board.D12)
blue = digitalio.DigitalInOut(board.D18)
# Initialise the LCD class
lcd = characterlcd.Character_LCD_RGB(
lcd_rs,
lcd_en,
lcd_d4,
lcd_d5,
lcd_d6,
lcd_d7,
lcd_columns,
lcd_rows,
red,
green,
blue,
lcd_backlight,
)
RED = [1, 0, 0]
GREEN = [0, 1, 0]
BLUE = [0, 0, 1]
while True:
lcd.clear()
lcd.message = "CircuitPython\nRGB Test: RED"
lcd.color = RED
def __init__(self,
rows: int,
columns: int,
rs_pin: DigitalInOut,
en_pin: DigitalInOut,
d7_pin: DigitalInOut,
d6_pin: DigitalInOut,
d5_pin: DigitalInOut,
d4_pin: DigitalInOut,
colour_lcd: bool,
i2c_enabled: bool,
red_pin: PWMOut = None,
green_pin: PWMOut = None,
blue_pin: PWMOut = None,
backlight_pin: DigitalInOut = None,
button_controller: ButtonController = None):
"""
Create a Display object to simplify LCD operations.
The pins need to be specified as following:
digitalio.DigitalInOut( board.<PIN> )
For colours:
pulseio.PWMOut( board.<PIN> )
If it's a colour LCD, the pins for RED, GREEN and BLUE must be specified. backlight_pin can remain None.
If it's a mono LCD, the backlight pin has to be specified.
:param rows: Amount of rows on the LCD.
:param columns: Amount of columns on the LCD.
:param rs_pin: Location where the RS pin is connected on the board.
:param en_pin: Location where the EN pin is connected on the board.
:param d7_pin: Location where the D7 pin is connected on the board.
:param d6_pin: Location where the D6 pin is connected on the board.
:param d5_pin: Location where the D5 pin is connected on the board.
:param d4_pin: Location where the D4 pin is connected on the board.
:param colour_lcd: Whether it's a colour display or not.
:param i2c_enabled: Whether the screen has buttons or not.
:param red_pin: Location where the RED pin is connected on the board.
:param blue_pin: Location where the BLUE pin is connected on the board.
:param green_pin: Location where the GREEN pin is connected on the board.
:param backlight_pin: Location where the backlight pin is connected on the board.
:param button_controller: A Button Controller class.
"""
# Set a global variable for checking if it's a colour LCD or not.
# Then set the colour tuple for a blue screen.
self.is_colour_lcd = colour_lcd
self.is_i2c = i2c_enabled
self.colour = None
self.set_colour(0, 0, 100)
# Set a global variable with the dimensions
self.dimensions = (columns, rows)
if self.is_i2c:
if self.is_colour_lcd:
self.lcd = i2crgb.Character_LCD_RGB_I2C(
button_controller.i2c, columns, rows)
else:
self.lcd = i2cmono.Character_LCD_I2C(button_controller.i2c,
columns, rows)
else:
# Initialise the LCD screen (type depending on the type of screen).
if self.is_colour_lcd:
self.lcd = charlcd.Character_LCD_RGB(rs_pin, en_pin, d4_pin,
d5_pin, d6_pin, d7_pin,
columns, rows, red_pin,
blue_pin, green_pin)
else:
self.lcd = charlcd.Character_LCD_Mono(rs_pin, en_pin, d4_pin,
d5_pin, d6_pin, d7_pin,
columns, rows,
backlight_pin)