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Diffstat (limited to 'Adafruit_Python_CharLCD/examples/char_lcd_mcp.py')
-rwxr-xr-x | Adafruit_Python_CharLCD/examples/char_lcd_mcp.py | 85 |
1 files changed, 85 insertions, 0 deletions
diff --git a/Adafruit_Python_CharLCD/examples/char_lcd_mcp.py b/Adafruit_Python_CharLCD/examples/char_lcd_mcp.py new file mode 100755 index 0000000..58b8d70 --- /dev/null +++ b/Adafruit_Python_CharLCD/examples/char_lcd_mcp.py @@ -0,0 +1,85 @@ +#!/usr/bin/python +# Example using an RGB character LCD connected to an MCP23017 GPIO extender. +import time + +import Adafruit_CharLCD as LCD +import Adafruit_GPIO.MCP230xx as MCP + + +# Define MCP pins connected to the LCD. +lcd_rs = 0 +lcd_en = 1 +lcd_d4 = 2 +lcd_d5 = 3 +lcd_d6 = 4 +lcd_d7 = 5 +lcd_red = 6 +lcd_green = 7 +lcd_blue = 8 + +# 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 MCP23017 device using its default 0x20 I2C address. +gpio = MCP.MCP23017() + +# Alternatively you can initialize the MCP device on another I2C address or bus. +# gpio = MCP.MCP23017(0x24, busnum=1) + +# Initialize the LCD using the pins +lcd = LCD.Adafruit_RGBCharLCD(lcd_rs, lcd_en, lcd_d4, lcd_d5, lcd_d6, lcd_d7, + lcd_columns, lcd_rows, lcd_red, lcd_green, lcd_blue, + gpio=gpio) + +# 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) |