63 lines
1.5 KiB
Python
63 lines
1.5 KiB
Python
"""Simple test for 16x2 character LCD connected to 74HC595 SPI LCD backpack."""
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import time
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import board
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import busio
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import digitalio
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import adafruit_character_lcd.character_lcd_spi as character_lcd
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# Modify this if you have a different sized character LCD
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lcd_columns = 16
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lcd_rows = 2
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# Backpack connection configuration:
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clk = board.SCK # Pin connected to backpack CLK.
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data = board.MOSI # Pin connected to backpack DAT/data.
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latch = board.D5 # Pin connected to backpack LAT/latch.
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# Initialise SPI bus.
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spi = busio.SPI(clk, MOSI=data)
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# Initialise the LCD class
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latch = digitalio.DigitalInOut(latch)
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lcd = character_lcd.Character_LCD_SPI(spi, latch, lcd_columns, lcd_rows)
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# Turn backlight on
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lcd.backlight = True
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# Print a two line message
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lcd.message = "Hello\nCircuitPython"
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# Wait 5s
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time.sleep(5)
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lcd.clear()
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# Print two line message right to left
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lcd.text_direction = lcd.RIGHT_TO_LEFT
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lcd.message = "Hello\nCircuitPython"
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# Wait 5s
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time.sleep(5)
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# Return text direction to left to right
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lcd.text_direction = lcd.LEFT_TO_RIGHT
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# Display cursor
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lcd.clear()
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lcd.cursor = True
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lcd.message = "Cursor! "
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# Wait 5s
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time.sleep(5)
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# Display blinking cursor
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lcd.clear()
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lcd.blink = True
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lcd.message = "Blinky Cursor!"
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# Wait 5s
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time.sleep(5)
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lcd.blink = False
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lcd.clear()
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# Create message to scroll
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scroll_msg = "<-- Scroll"
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lcd.message = scroll_msg
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# Scroll message to the left
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for i in range(len(scroll_msg)):
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time.sleep(0.5)
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lcd.move_left()
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lcd.clear()
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lcd.message = "Going to sleep\nCya later!"
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# Turn backlight off
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lcd.backlight = False
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time.sleep(2)
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