/
demo_lcd_custom_characters.py
executable file
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/
demo_lcd_custom_characters.py
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#! /usr/bin/env python
# Custom characters string program. Writes strings with custom characters, that can't
# be found in the characters table. It is possible to use a custom characters by definig
# it's code on paseholder whyle useng and extended string.
# Appearance of the custom characters can be defined by redifenition of the fields of
# CustomCaracters class instance.
# Codes of the custom characters, that can be used in placeholders are the following:
# 1st - {0x00}, 2nd - {0x01}, 3rd - {0x02}, 4th - {0x03}, 5th - {0x04},
# 6th - {0x05}, 7th - {0x06} and 8th - {0x07}
# Remember to use method load_custom_characters_data() to load the custom characters
# data into the CG RAM.
# Demo program for the I2C 16x2 Display from Ryanteck.uk
# Created by Dmitry Safonov
# Import necessary libraries for communication and display use
import drivers
from time import sleep
# Load the driver and set it to "display"
# If you use something from the driver library use the "display." prefix first
display = drivers.Lcd()
# Create object with custom characters data
cc = drivers.CustomCharacters(display)
# Redefine the default characters:
# Custom caracter #1. Code {0x00}.
cc.char_1_data = ["01110",
"01010",
"01110",
"00100",
"11111",
"11111",
"11111",
"11111"]
# Custom caracter #2. Code {0x01}.
cc.char_2_data = ["11111",
"10101",
"10101",
"11111",
"11111",
"10101",
"10101",
"11111"]
# Custom caracter #3. Code {0x02}.
cc.char_3_data = ["10001",
"10001",
"10001",
"11111",
"11111",
"11111",
"11111",
"11111"]
# Custom caracter #4. Code {0x03}.
cc.char_4_data = ["11111",
"11011",
"10001",
"10001",
"10001",
"10001",
"11011",
"11111"]
# Custom caracter #5. Code {0x04}.
cc.char_5_data = ["00000",
"00000",
"11011",
"11011",
"00000",
"10001",
"01110",
"00000"]
# Custom caracter #6. Code {0x05}.
cc.char_6_data = ["01010",
"11111",
"11111",
"01110",
"00100",
"00000",
"00000",
"00000"]
# Custom caracter #7. Code {0x06}.
cc.char_7_data = ["11111",
"11011",
"10001",
"10101",
"10101",
"10101",
"11011",
"11111"]
# Custom caracter #8. Code {0x07}.
cc.char_8_data = ["11111",
"10001",
"11111",
"00000",
"00000",
"11111",
"10001",
"11111"]
# Load custom characters data to CG RAM:
cc.load_custom_characters_data()
# Main body of code
try:
while True:
# Remember that your sentences can only be 16 characters long!
print("Printing custom characters:")
display.lcd_display_string("Custom caracters:", 1) # Write line of text to first line of display
display.lcd_display_extended_string("{0x00}{0x01}{0x02}{0x03}{0x04}{0x05}{0x06}{0x07}", 2) # Write line of text to second line of display
sleep(2) # Give time for the message to be read
except KeyboardInterrupt:
# If there is a KeyboardInterrupt (when you press ctrl+c), exit the program and cleanup
print("Cleaning up!")
display.lcd_clear()