LiquidCrystal_I2C V1.0
The LiquidCrystal_I2C library is a modified version of the standard LiquidCrystal library as found on
the Arduino website.
This library is intended to be used when a parallel HD44780 compatible LCD is controlled over I2C using
a PCF8574 extender (see datasheet for details).
4 of the 8 outputs are used for LDC data lines 4 to 7.
3 outputs are used for the Enable, register-select and Read/Write lines.
The one output left can be used to control the backlight of the LCD (if available).
For backlight control some extra resistors and a pnp-type transistor are required (for details see
schematic diagram).
The PCF8574 extender is available in two versions, the PCF8574 and the PCF8574A.
The only difference between the two is the I2C base address.
The base address for the PCF8574=0x20 and the base address for the PCF8574A is 0x38.
The examples included in this zip file assume the use of an PCF8574 set for address 0x20
(A0, A1 and A3 grounded).
For compatibility reasons this library contains some aliases for functions that are known under different
names in other libraries. This should make it fairly easy to implement the library in existing sketches
without changing to much code.
Functions not supported by this library will return nothing at all and in case a return value is expected
the function will return 0.
Currently (sept. 2009) the library is tested with Arduino Duemilanove & IDE 0016.
LCD's tested:
TRI-T CG046-3007 A00 (2 x 16 with 20mA backlight)
Sure DE-LM220 (4 x 20 with 10mA backlight)
Update:
User submitted compatibility notifications:
AV-DISPLAY LCD 0802 (2 X 8 with LED (GREEN/K) Negative) on Duemilanove & IDE 0017. By Federico Galli
Download latest version from:
http://www.xs4all.nl/~hmario/arduino/LiquidCrystal_I2C/LiquidCrystal_I2C.zip
Mario H.
atmega@xs4all.nl
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2017-11-21
16:30:04
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LiquidCrystal_I2C.rar （71个子文件） 
LiquidCrystal_I2C 
LiquidCrystal_I2C.cpp 8KB
keywords.txt 1KB info 
Schematic_diagram.jpg 192KB
PCF8574P.pdf 815KB BC557.pdf 90KB Image.jpg 61KB readme.txt 2KB examples hello 2004 hello 2004.pde 528B applet wiring.c.o 9KB HelloWorld.cpp.eep 13B HelloWorld.cpp 477B WMath.cpp.o 7KB HelloWorld.cpp.elf 48KB HardwareSerial.cpp.o 16KB HelloWorld.cpp.o 5KB wiring_digital.c.o 8KB core.a 91KB Print.cpp.o 25KB wiring_analog.c.o 6KB WInterrupts.c.o 5KB Wire Wire.cpp.o 22KB utility twi.c.o 16KB wiring_pulse.c.o 6KB LiquidCrystal_I2C LiquidCrystal_I2C.cpp.o 41KB utility wiring_shift.c.o 4KB HelloWorld.cpp.hex 9KB pins_arduino.c.o 3KB hello world hello world.pde 429B HelloWorld HelloWorld.pde 345B CustomChars CustomChars.pde 1KB applet wiring.c.o 9KB CustomChars.cpp.eep 13B CustomChars.cpp.o 9KB WMath.cpp.o 7KB CustomChars.cpp.elf 51KB HardwareSerial.cpp.o 16KB wiring_digital.c.o 8KB core.a 91KB Print.cpp.o 25KB wiring_analog.c.o 6KB WInterrupts.c.o 5KB CustomChars.cpp.hex 12KB Wire Wire.cpp.o 22KB utility twi.c.o 16KB wiring_pulse.c.o 6KB LiquidCrystal_I2C LiquidCrystal_I2C.cpp.o 41KB utility wiring_shift.c.o 4KB CustomChars.cpp 2KB pins_arduino.c.o 3KB SerialDisplay SerialDisplay.pde 733B applet wiring.c.o 9KB SerialDisplay.cpp 890B WMath.cpp.o 7KB SerialDisplay.cpp.o 6KB HardwareSerial.cpp.o 16KB SerialDisplay.cpp.hex 12KB wiring_digital.c.o 8KB core.a 91KB Print.cpp.o 25KB wiring_analog.c.o 6KB WInterrupts.c.o 5KB SerialDisplay.cpp.elf 56KB SerialDisplay.cpp.eep 13B Wire Wire.cpp.o 22KB utility twi.c.o 16KB wiring_pulse.c.o 6KB LiquidCrystal_I2C LiquidCrystal_I2C.cpp.o 41KB utility wiring_shift.c.o 4KB pins_arduino.c.o 3KB LiquidCrystal_I2C.h 3KB LiquidCrystal_I2C.o 41KB资源评论
