57 lines
1.3 KiB
Python
57 lines
1.3 KiB
Python
# Hello World using 16x2 character lcd and an 74LS595 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
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# Character LCD Config:
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# modify this if you have a different sized charlcd
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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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# Initialize SPI bus.
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spi = busio.SPI(clk, MOSI=data)
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# Init the lcd class
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latch = digitalio.DigitalInOut(latch)
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lcd = adafruit_character_lcd.Character_LCD_SPI(spi, latch, lcd_columns, lcd_rows)
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# Print a 2x 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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# Demo showing cursor
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lcd.clear()
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lcd.show_cursor(True)
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lcd.message('showing cursor ')
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# Wait 5s
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time.sleep(5)
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# Demo showing the 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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# Demo scrolling message LEFT
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lcd.clear()
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scroll_msg = 'Scroll'
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lcd.message(scroll_msg)
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# Scroll to the left
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for i in range(lcd_columns - len(scroll_msg)):
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time.sleep(0.5)
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lcd.move_left()
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# Demo turning backlight off
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lcd.clear()
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lcd.message("going to sleep\ncya later!")
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lcd.set_backlight(False)
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time.sleep(2)
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