Example 6: Blink Cursor¶
examples/ex6_qwiic_serlcd_blink_cursor.py¶
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 | #!/usr/bin/env python
#-----------------------------------------------------------------------------
# ex6_qwiic_serlcd_blink_cursor.py
#
# Simple example demonstrating the blinking cursor controls on the SerLCD (Qwiic).
#
# This example prints "Hello World!" to the LCD and
# uses the blink() and noBlink() methods to turn
# on and off the blinking.
#------------------------------------------------------------------------
#
# Written by SparkFun Electronics, August 2020
#
# Ported from Arduino Library code with many contributions from
# Gaston Williams - August 29, 2018
#
# This python library supports the SparkFun Electroncis qwiic
# qwiic sensor/board ecosystem on a Raspberry Pi (and compatable) single
# board computers.
#
# More information on qwiic is at https://www.sparkfun.com/qwiic
#
# Do you like this library? Help support SparkFun. Buy a board!
#
#==================================================================================
# Copyright (c) 2020 SparkFun Electronics
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in all
# copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.
#==================================================================================
# Example 6
#
from __future__ import print_function
import qwiic_serlcd
import time
import sys
def runExample():
print("\nSparkFun Qwiic SerLCD Example 6\n")
myLCD = qwiic_serlcd.QwiicSerlcd()
if myLCD.connected == False:
print("The Qwiic SerLCD device isn't connected to the system. Please check your connection", \
file=sys.stderr)
return
myLCD.setBacklight(255, 255, 255) # Set backlight to bright white
myLCD.setContrast(5) # set contrast. Lower to 0 for higher contrast.
myLCD.clearScreen()
myLCD.cursor() # Turn on the underline cursor
time.sleep(1) # give a sec for system messages to complete
myLCD.print("Hello World!")
while True:
# turn off the blinking cursor
print("Cursor blinking OFF")
myLCD.noBlink()
time.sleep(5)
# turn on the blinking cursor
print("Cursor blinking ON")
myLCD.blink()
time.sleep(5)
if __name__ == '__main__':
try:
runExample()
except (KeyboardInterrupt, SystemExit) as exErr:
print("\nEnding Example 6")
sys.exit(0)
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