heater_driver/hd44780.c at master · MateuszMielniczuk/heater_driver · GitHub

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#include<avr/io.h>
#include<util/delay.h>
#include "hd44780.h"

/*--------------------------------------------------------*/
/* Zapis danej lub instrukcji */

void WriteToLCD (unsigned char v,unsigned char  rs)
{
    unsigned char bf;

    SET_OUT_LCD_D4;
    SET_OUT_LCD_D5;
    SET_OUT_LCD_D6;
    SET_OUT_LCD_D7;

    if(v&0x10) SET_LCD_D4; else CLR_LCD_D4;
    if(v&0x20) SET_LCD_D5; else CLR_LCD_D5;
    if(v&0x40) SET_LCD_D6; else CLR_LCD_D6;
    if(v&0x80) SET_LCD_D7; else CLR_LCD_D7;

    CLR_LCD_E;
    if(rs) SET_LCD_RS;else CLR_LCD_RS;
    CLR_LCD_RW;

    LCD_NOP;
    SET_LCD_E;
    LCD_NOP;
    CLR_LCD_E;
    LCD_NOP;

    if(v&0x01) SET_LCD_D4; else CLR_LCD_D4;
    if(v&0x02) SET_LCD_D5; else CLR_LCD_D5;
    if(v&0x04) SET_LCD_D6; else CLR_LCD_D6;
    if(v&0x08) SET_LCD_D7; else CLR_LCD_D7;

    LCD_NOP;
    SET_LCD_E;
    LCD_NOP;
    CLR_LCD_E;
    LCD_NOP;

    SET_IN_LCD_D4;
    SET_IN_LCD_D5;
    SET_IN_LCD_D6;
    SET_IN_LCD_D7;

    CLR_LCD_RS;
    SET_LCD_RW;
    SET_LCD_D7;


/* Przyda?by si? pe?ny odczyt */
    do
    {
        LCD_NOP;
        SET_LCD_E;
        LCD_NOP;
        bf = IS_SET_LCD_D7;
        CLR_LCD_E;
        LCD_NOP;
        SET_LCD_E;
        LCD_NOP;
        LCD_NOP;
        CLR_LCD_E;

    }while( bf );
}


/*--------------------------------------------------------*/
/* Funkcja odczytuje adres i flage zajetosci */

unsigned char ReadAddressLCD ( void)
{
    unsigned char g = 0 ;

    CLR_LCD_RS;
    SET_LCD_RW;

    SET_IN_LCD_D4;
    SET_IN_LCD_D5;
    SET_IN_LCD_D6;
    SET_IN_LCD_D7;

    LCD_NOP;
    SET_LCD_E;
    LCD_NOP;

    if(IS_SET_LCD_D4) g+=16;
    if(IS_SET_LCD_D4) g+=32;
    if(IS_SET_LCD_D4) g+=64;
    if(IS_SET_LCD_D4) g+=128;

    CLR_LCD_E;
    LCD_NOP;
    SET_LCD_E;
    LCD_NOP;

    if(IS_SET_LCD_D4) g+=8;
    if(IS_SET_LCD_D4) g+=4;
    if(IS_SET_LCD_D4) g+=2;
    if(IS_SET_LCD_D4) g+=1;

    CLR_LCD_E;

    return  g ;
}


/*---------------------------------------------------------*/
/* Inicjalizacja wy?wietlacza */

void lcd_init(void)
{
    _delay_ms(31);

    SET_OUT_LCD_RS;
    SET_OUT_LCD_RW;
    SET_OUT_LCD_E;
    SET_OUT_LCD_D4;
    SET_OUT_LCD_D5;
    SET_OUT_LCD_D6;
    SET_OUT_LCD_D7;

    CLR_LCD_E;
    CLR_LCD_RS;
    CLR_LCD_RW;
    SET_LCD_D4;
    SET_LCD_D5;
    CLR_LCD_D6;
    CLR_LCD_D7;

    LCD_NOP;
    SET_LCD_E;
    LCD_NOP;
    CLR_LCD_E;
    LCD_NOP;
    _delay_ms(10);

    LCD_NOP;
    SET_LCD_E;
    LCD_NOP;
    CLR_LCD_E;
    LCD_NOP;
    _delay_ms(2);

    LCD_NOP;
    SET_LCD_E;
    LCD_NOP;
    CLR_LCD_E;
    LCD_NOP;
    _delay_ms(2);

    CLR_LCD_D4;
    LCD_NOP;
    SET_LCD_E;
    LCD_NOP;
    CLR_LCD_E;
    LCD_NOP;
    _delay_us(80);

    WriteToLCD (0x28 , LCDCOMMAND) ;
    LCD_DISPLAY(0) ;
    LCD_CLEAR ;
    LCD_ENTRY_MODE(LCDINCREMENT) ;
}


/*--------------------------------------------------------*/
/* Wyswietla tekst na aktualnej pozycji kursora */

void lcd_puts(char *str)
{
    unsigned char i =0;

    while( str[i])
        LCD_WRITE_DATA(str[i++]) ;
}