I2C_Character_LCD

What is this?

I²C character LCD class drivers for AE-AQM0802, ACM2004D-FLW-FBW-IIC and ACM1602NI-FLW-FBW-M01

The code runs on MicroPython, operation is checked on Raspberry Pi Pico, MIMXRT1050-EVKB and MIMXRT1010-EVK.

A video is available to show how are those can be looked like.

How can it be used?

Refer to sample code. Sample code available for each MCUs and LCDs.
Before trying the example code, upload I2C_Character_LCD.py into flash storage area of target microcontroller board.

Next code shows a sample of using ACM2004: 20 characters x 4 lines LCD.
The sample is available as example/RaspberryPiPico/ACM2004.py.

from machine	import	I2C, Pin
from time		import	sleep
from I2C_Character_LCD	import	ACM2004

i2c	= I2C( 0, sda = Pin( 0 ), scl = Pin( 1 ), freq = 400_000 )
lcd	= ACM2004( i2c )

while True:
	lcd.print( "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz01234567890!@#$%^&" )
	sleep( 1 )

	lcd.print( [ "ABCDEFGHIJKLMNOPQRST", "abcdefghijklmnopqrst", "01234567890123456789", "!@#$%^&*()!@#$%^&*()" ] )
	sleep( 1 )
	
	lcd.clear()
	sleep( 1 )

functions

print()

print() function is available to print the characters.
The print() can take two types of argument.

• If an string is given as the argument, the text wraps and is displayed on the next line.
• If a list of strings is given, each strings will be shown in lines. If the item in the list is None, the line will be kept as it is.

clear()

Another function: clear() is available to clear the screen.

Connecting hardware

MCU

Signal	Raspberry Pi Pico	MIMXRT1050	MIMXRT1010
SDA	Pin1(GP0)	A4/ADC4/SDA	D14/I2C_SDA
SCL	Pin2(GP1)	A5/ADC5/SCL	D15/I2C_SCL

LCD

AE-AQM0802

Pin#	Name
1	VDD(3.3V)
2	nRESET
3	I2C_SCL
4	I2C_SDA
5	GND

ACM2004D-FLW-FBW-IIC

Pin#	Name
1	VSS(GND)
2	VDD(5V)
3	V0(NC)
4	I2C_SDA
5	I2C_SCL
6	Backlight+(5V)
7	Backlight-(0V)

ACM1602NI-FLW-FBW-M01

Pin#	Name
1	VSS(GND)
2	VDD(3.3V)
3	V0(contrast adj)
4	I2C_SCL
5	I2C_SDA
6	Backlight+(3.3V)
7	Backlight-(0V)

scenes

AE-AQM0802

ACM2004D-FLW-FBW-IIC

ACM1602NI-FLW-FBW-M01