diff options
Diffstat (limited to 'Adafruit_Python_CharLCD/examples/char_lcd.py')
-rwxr-xr-x | Adafruit_Python_CharLCD/examples/char_lcd.py | 84 |
1 files changed, 84 insertions, 0 deletions
diff --git a/Adafruit_Python_CharLCD/examples/char_lcd.py b/Adafruit_Python_CharLCD/examples/char_lcd.py new file mode 100755 index 0000000..a7e017e --- /dev/null +++ b/Adafruit_Python_CharLCD/examples/char_lcd.py @@ -0,0 +1,84 @@ +#!/usr/bin/python +# Example using a character LCD connected to a Raspberry Pi or BeagleBone Black. +import time + +import Adafruit_CharLCD as LCD + + +# Raspberry Pi pin configuration: +lcd_rs = 27 # Note this might need to be changed to 21 for older revision Pi's. +lcd_en = 22 +lcd_d4 = 25 +lcd_d5 = 24 +lcd_d6 = 23 +lcd_d7 = 18 +lcd_backlight = 4 + +# BeagleBone Black configuration: +# lcd_rs = 'P8_8' +# lcd_en = 'P8_10' +# lcd_d4 = 'P8_18' +# lcd_d5 = 'P8_16' +# lcd_d6 = 'P8_14' +# lcd_d7 = 'P8_12' +# lcd_backlight = 'P8_7' + +# Define LCD column and row size for 16x2 LCD. +lcd_columns = 16 +lcd_rows = 2 + +# Alternatively specify a 20x4 LCD. +# lcd_columns = 20 +# lcd_rows = 4 + +# Initialize the LCD using the pins above. +lcd = LCD.Adafruit_CharLCD(lcd_rs, lcd_en, lcd_d4, lcd_d5, lcd_d6, lcd_d7, + lcd_columns, lcd_rows, lcd_backlight) + +# Print a two line message +lcd.message('Hello\nworld!') + +# Wait 5 seconds +time.sleep(5.0) + +# Demo showing the cursor. +lcd.clear() +lcd.show_cursor(True) +lcd.message('Show cursor') + +time.sleep(5.0) + +# Demo showing the blinking cursor. +lcd.clear() +lcd.blink(True) +lcd.message('Blink cursor') + +time.sleep(5.0) + +# Stop blinking and showing cursor. +lcd.show_cursor(False) +lcd.blink(False) + +# Demo scrolling message right/left. +lcd.clear() +message = 'Scroll' +lcd.message(message) +for i in range(lcd_columns-len(message)): + time.sleep(0.5) + lcd.move_right() +for i in range(lcd_columns-len(message)): + time.sleep(0.5) + lcd.move_left() + +# Demo turning backlight off and on. +lcd.clear() +lcd.message('Flash backlight\nin 5 seconds...') +time.sleep(5.0) +# Turn backlight off. +lcd.set_backlight(0) +time.sleep(2.0) +# Change message. +lcd.clear() +lcd.message('Goodbye!') +# Turn backlight on. +lcd.set_backlight(1) |