LCD HD44780 Atmega16 und PCF8574

/*

 * GccApplication1.c

 *

 * Created: 26.05.2016 20:58:27

 * Author : creme

 * LCD Pin Description

 * 1 - Vss (GND)

 * 2 - Vcc (+5V)

 * 3 - Vee (poti Kontrasteinstellung)

 * 4 - RS

 * 5 - R/W

 * 6 - E

 * 7 - DB0

 * 8 - DB1

 * 9 - DB2

 * 10 - DB3

 * 11 - DB4

 * 12 - DB5

 * 13 - DB6

 * 14 - DB7

 * PCF8574 Pin Description

 * P0 - DB4

 * P1 - DB5

 * P2 - DB6

 * P3 - DB7

 * P4 - RS

 * P5 - E

 * R/W - GND

 */ 

#include <avr/io.h>

#include <avr/interrupt.h>

//#include <avr/iom16.h> //ISR Vektoradresse mit Variablenbezeichnung

//#include "lcd-routines.h"

#include "i2clcd.h"

#include "i2cmaster.h"

//#define F_CPU 1000000UL

//#include "lcd.h"

//#include <avr/i2c>

#define DevPCF8457 0x40

uint8_t PCFPort = 0x00;

#define PC0 0

#define PC1 1

#define PC2 2

#define PC3 3

#define PC4 4

#define PC5 5

#define PC6 6

#define PC7 7

#define RS (1<<PC0)

#define RW (1<<PC1)

#define E (1<<PC2)

//#define PC3 (1<<3)

#define D4 (1<<PC4)

#define D5 (1<<PC5)

#define D6 (1<<PC6)

#define D7 (1<<PC7)

#define PX (1<<0)

#define SetDisplay 0x08

#define DisplayOn 0x04

#define CursorOn 0x02

#define CursorOff 0x00

#define CursorBlinkOn 0x01

#define CursorBlinkOff 0x00

#define LCDSetEntry 0x10

#define LCDEntryIncrease 0x04

#define LCDEntryDecrease 0x00

#define LCDShift 0x01

#define LCDNoShift 0x00

#define DisplayCursorShift 0x10

#define ClearDisp 0x01

#define FuncionSet 0x20

#define LCD4Bit 0x00

#define LCD2Lines 0x08

#define LCD5x7 0x00

uint16_t cnt=0;

uint8_t fin=0;

ISR(TIMER0_COMP_vect)

//Aufruf alle 2,04ms

{

  cnt++;

  if(cnt<=2451) //~5sec

  {  

    fin=1;

    cnt=0;

  }

  TCNT0 = 0;

}

void lcd_init_pcf(void)

{

  _delay_ms(16);

}

void LCD_Command_PCF(uint8_t data)

{

  //RS auf 0 setzen

  //i2c_start_wait(LCD_I2C_DEVICE+I2C_WRITE);

  //i2c_write((!RS));

  //i2c_stop();

  //for(uint8_t i=0; i<=12;i++)_delay_ms(500);

  i2c_start_wait(LCD_I2C_DEVICE+I2C_WRITE);

  //i2c_write((!RS) | (data&0xF0)); //first high byte

  i2c_write((data&0xF0)); //first high byte

  i2c_stop();

  _delay_us(20);for(uint8_t i=0; i<=12;i++)_delay_ms(500); 

  i2c_start_wait(LCD_I2C_DEVICE+I2C_WRITE);

  //i2c_write((!RS) | (data<<4) ); //low byte

  i2c_write((data<<4) ); //low byte

  i2c_stop();

  _delay_us(84); //42

  //for(uint8_t i=0; i<=12;i++)_delay_ms(500);

}

void LCD_Data_PCF(uint8_t data)

{

    //RS auf 1 setzen

    i2c_start_wait(LCD_I2C_DEVICE+I2C_WRITE);

    i2c_write(RS);

    i2c_stop();

    //for(uint8_t i=0; i<=12;i++)_delay_ms(500);

    i2c_start_wait(LCD_I2C_DEVICE+I2C_WRITE);

    i2c_write(RS | (data&0xF0)); //first high bytes

    i2c_stop();

    //20 //for(uint8_t i=0; i<=12;i++)_delay_ms(500);

    i2c_start_wait(LCD_I2C_DEVICE+I2C_WRITE);

    i2c_write(RS | (data<<4) ); //low bytes

    i2c_stop();

    _delay_us(92); //46

}

void LCD_Clear_PCF(void)

{

  LCD_Command_PCF(0x01);

  _delay_ms(6); //3

}

void pause(void)

{

}

int main(void)

{

  //Test

  DDRD |= (1<<PD6);

  PORTD &= ~(1<<PD6);

  //

  DDRC |= (1<<PC0) | (1<<PC1);

  i2c_init();

  _delay_ms(100); //16

    i2c_start_wait(LCD_I2C_DEVICE+I2C_WRITE);

    i2c_write(0x00);

    i2c_stop();

  //for(uint8_t i=0; i<=12;i++)_delay_ms(500);

  _delay_us(20);

  //LCD Software Reset

  i2c_start_wait(LCD_I2C_DEVICE+I2C_WRITE);

  i2c_write(FuncionSet | D4); //1

  i2c_stop();  

  _delay_ms(10);//5 for(uint8_t i=0; i<=12;i++)_delay_ms(500);

  //Enable Pulse Signal

  i2c_start_wait(LCD_I2C_DEVICE+I2C_WRITE);

  i2c_write(FuncionSet | D4 | E); //2

  i2c_stop();

  _delay_us(40);// 20 for(uint8_t i=0; i<=12;i++) _delay_ms(500);

  i2c_start_wait(LCD_I2C_DEVICE+I2C_WRITE);

  i2c_write(FuncionSet | D4); //3

  i2c_stop();

  _delay_ms(2);//1for(uint8_t i=0; i<=12;i++)_delay_ms(500); 

  //Enable Pulse Signal

  i2c_start_wait(LCD_I2C_DEVICE+I2C_WRITE);

  i2c_write(FuncionSet | D4 | E); //4

  i2c_stop();  

  _delay_us(40);//20for(uint8_t i=0; i<=12;i++)_delay_ms(500); 

  i2c_start_wait(LCD_I2C_DEVICE+I2C_WRITE);

  i2c_write(FuncionSet | D4); //5

  i2c_stop();

  _delay_ms(2);//1 for(uint8_t i=0; i<=12;i++)_delay_ms(500); 

  //4-Bit Modus aktivieren

  i2c_start_wait(LCD_I2C_DEVICE+I2C_WRITE);

  i2c_write(FuncionSet | LCD4Bit); //6

  i2c_stop();

  _delay_ms(20);//5//for(uint8_t i=0; i<=12;i++)_delay_ms(500);  

  LCD_Command_PCF(FuncionSet | LCD4Bit | LCD2Lines | LCD5x7); //7, 8

  //for(uint8_t i=0; i<=12;i++)_delay_ms(500);

  LCD_Command_PCF(SetDisplay | DisplayOn | CursorOff | CursorBlinkOff); //9,10

  //for(uint8_t i=0; i<=12;i++)_delay_ms(500);

  LCD_Command_PCF(LCDSetEntry | LCDEntryIncrease | LCDNoShift);

  //for(uint8_t i=0; i<=12;i++)_delay_ms(500);

  LCD_Clear_PCF();

  //for(uint8_t i=0; i<=12;i++)_delay_ms(500);

  LCD_Data_PCF('T');

  //PORTD &= ~(1<<PD6);

    while (1) 

    {

    }

}