8000 ex9 working · sparkfun/qwiic_serlcd_py@4c7826a · GitHub
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Pete Lewis
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ex9 working
also added a 10ms delay to print function just like in the arduino library
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‎examples/ex9_qwiic_serlcd_custom_character.py

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#!/usr/bin/env python
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#-----------------------------------------------------------------------------
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# ex9_qwiic_serlcd_custom_character.py
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#
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# This example prints "I <heart> SerLCD!" and a little dancing man
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# to the LCD.
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#
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# Custom characters are recorded to SerLCD and are remembered even after power is lost.
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# There is a maximum of 8 custom characters that can be recorded.
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#
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#------------------------------------------------------------------------
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#
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# Written by SparkFun Electronics, August 2020
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#
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# Ported from Arduino Library code with many contributions from
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# Gaston Williams - August 29, 2018
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#
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# Based on Adafruit's example at
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#
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# https://github.com/adafruit/SPI_VFD/blob/master/examples/createChar/createChar.pde
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#
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# This example code is in the public domain.
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# http://www.arduino.cc/en/Tutorial/LiquidCrystalCustomCharacter
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#
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# Also useful:
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# http://icontexto.com/charactercreator/
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#
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# This python library supports the SparkFun Electroncis qwiic
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# qwiic sensor/board ecosystem on a Raspberry Pi (and compatable) single
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# board computers.
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#
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# More information on qwiic is at https://www.sparkfun.com/qwiic
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#
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# Do you like this library? Help support SparkFun. Buy a board!
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#
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#==================================================================================
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# Copyright (c) 2020 SparkFun Electronics
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#
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# Permission is hereby granted, free of charge, to any person obtaining a copy
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# of this software and associated documentation files (the "Software"), to deal
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# in the Software without restriction, including without limitation the rights
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# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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# copies of the Software, and to permit persons to whom the Software is
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# furnished to do so, subject to the following conditions:
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#
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# The above copyright notice and this permission notice shall be included in all
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# copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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# SOFTWARE.
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#==================================================================================
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# Example 9
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#
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from __future__ import print_function
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import qwiic_serlcd
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import time
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import sys
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def runExample():
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print("\nSparkFun Qwiic SerLCD Example 9\n")
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myLCD = qwiic_serlcd.QwiicSerlcd()
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if myLCD.connected == False:
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print("The Qwiic SerLCD device isn't connected to the system. Please check your connection", \
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file=sys.stderr)
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return
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myLCD.setBacklight(255, 255, 255) # Set backlight to bright white
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myLCD.setContrast(5) # set contrast. Lower to 0 for higher contrast.
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myLCD.begin() # call this for default settings (no
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myLCD.leftToRight()
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time.sleep(1) # give a sec for system messages to complete
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# make some custom characters:
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heart = [
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0b00000,
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0b01010,
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0b11111,
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0b11111,
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0b11111,
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0b01110,
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0b00100,
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0b00000]
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smiley = [
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0b00000,
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0b00000,
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0b01010,
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0b00000,
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0b00000,
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0b10001,
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0b01110,
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0b00000]
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frownie = [
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0b00000,
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0b00000,
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0b01010,
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0b00000,
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0b00000,
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0b00000,
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0b01110,
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0b10001]
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armsDown = [
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0b00100,
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0b01010,
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0b00100,
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0b00100,
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0b01110,
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0b10101,
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0b00100,
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0b01010]
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armsUp = [
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0b00100,
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0b01010,
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0b00100,
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0b10101,
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0b01110,
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0b00100,
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0b00100,
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0b01010]
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myLCD.createChar(0, heart)
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myLCD.createChar(1, smiley)
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myLCD.createChar(2, frownie)
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myLCD.createChar(3, armsDown)
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myLCD.createChar(4, armsUp)
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myLCD.setCursor(0,0) # set cursor to the top left
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# Print a message to the LCD.
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myLCD.print("I ")
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myLCD.writeChar(0) # Print the heart character, stored in location 0
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myLCD.print(" SerLCD! ")
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myLCD.writeChar(1) # Print smiley
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while True:
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myLCD.setCursor(4,1) # column, row
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myLCD.writeChar(3) # print little man, arms down
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time.sleep(0.2)
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myLCD.setCursor(4,1) # column, row
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myLCD.writeChar(4) # print little man, arms up
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time.sleep(0.2)
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if __name__ == '__main__':
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try:
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runExample()
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except (KeyboardInterrupt, SystemExit) as exErr:
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print("\nEnding Example 9")
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sys.exit(0)
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‎qwiic_serlcd.py

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for c in string:
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if self._i2c.writeCommand(self.address, ord(c)) == False:
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return False
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time.sleep(0.01)
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return True
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# ----------------------------------
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"""
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self._displayControl &= ~LCD_ENTRYLEFT
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return self.specialCommand(LCD_ENTRYMODESET | self._displayControl)
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# ----------------------------------
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# createChar()
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#
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# Create a customer character
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# byte location - character number 0 to 7
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# byte[] charmap - byte array for character
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def createChar(self, location, charmap):
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"""
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Create a customer character
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:param location: character number 0 to 7
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:param charmap: byte array for character
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:return: Returns true if the I2C write was successful, otherwise False.
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:rtype: bool
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"""
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location &= 0x7 # we only have 8 locations 0-7
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# create a block of data bytes to send to the screen
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# This will include the location (with the addition of 27 to let the screen know)
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# and the 8 bytes of charmap
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block = [0,1,2,3,4,5,6,7,8,9]
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block[0] = (27 + location) # command type/location
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for i in range(1,9):
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block[i] = charmap[i-1]
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# send the complete bytes (address, settings command , write char command (includes location), charmap)
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result = self._i2c.writeBlock(self.address, SETTING_COMMAND, block)
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time.sleep(0.05)
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return result
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# ----------------------------------
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# writeChar()
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#
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# Write a customer character to the display
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# byte location - character number 0 to 7
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def writeChar(self, location):
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"""
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Write a customer character to the display
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:param location: character number 0 to 7
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:return: Returns true if the I2C write was successful, otherwise False.
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:rtype: bool
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"""
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location &= 0x7 # we only have 8 locations 0-7
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# send command
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result = self.command(35 + location)
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time.sleep(0.05)
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return result

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