i2clcd Documentation

i2clcd.h - LCD over I2C library

Designed for HD44870 based LCDs with I2C expander PCF8574X on Atmels AVR MCUs

Author:

Nico Eichelmann, Thomas Eichelmann

Version:

0.1

License:

GNU Lesser General Public License

Files:

i2clcd.h
i2clcd.c

Note:

Requires I2C-Library from Peter Fleury http://jump.to/fleury

Only testet with the following configuration:

2x16 Display (KS0070B), PCF8574P, ATMega32 @ 16 Mhz
avr-gcc (GCC) 4.1.0

PIN-Assignment:

 PCF8574	<->		LCD
 ----------------------------------------------
 P0		<->		DB4
 P1		<->		DB5
 P2		<->		DB6
 P3		<->		DB7
 P4		<->		RS
 P5		<->		R/W
 P6		<->		-
 P7		<->		Enable 

Example:

 #include "i2clcd.h"
        
 int main(void)
 {
        ...
        lcd_init();                                             //-     Display initialization
        ...
        char string[] = "Hi World";
        lcd_print(string);                                      //-     Print a string
        lcd_gotolr(2,4);                                        //-     Move to position (line 2, row 4)
        
        //-     Turn cursor off and activate blinking
        lcd_command(LCD_DISPLAYON | LCD_CURSOROFF | LCD_BLINKINGON);
        ...
 } 

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