PTM2 regulator

/**************************************/
/*              ARE 2008              */
/*      e-mail: biuro@are.net.pl      */
/*      www   : are.net.pl            */
/**************************************/

#define F_CPU 8000000UL  // 1 MHz
//#define F_CPU 14.7456E6
#include <avr/io.h>
#include <stdio.h>
#include <util/delay.h>
#include <string.h>

void delay_ms(int ms)
    {
    volatile long unsigned int i;
    for(i=0;i<ms;i++)
        _delay_ms(1);
    }

void delay_us(int us)
    {
    volatile long unsigned int i;
    for(i=0;i<us;i++)
        _delay_us(1);
    }

//RS PA0
//RW PA1
//E  PA2
//DATA PD

#define RS 0
#define RW 1
#define E  2

void LCD2x16_init(void)
{
PORTC &= ~(1<<RS);
PORTC &= ~(1<<RW);

PORTC |= (1<<E);
PORTD = 0x38;   // dwie linie, 5x7 punktow
PORTC &=~(1<<E);
_delay_us(120);

PORTC |= (1<<E);
PORTD = 0x0e;   // wlacz wyswietlacz, kursor, miganie
PORTC &=~(1<<E);
_delay_us(120);

PORTC |= (1<<E);
PORTD = 0x06;
PORTC &=~(1<<E);
_delay_us(120);
}

void LCD2x16_clear(void){
PORTC &= ~(1<<RS);
PORTC &= ~(1<<RW);

PORTC |= (1<<E);
PORTD = 0x01;
PORTC &=~(1<<E);
delay_ms(120);
}

void LCD2x16_putchar(int data)
{
PORTC |= (1<<RS);
PORTC &= ~(1<<RW);

PORTC |= (1<<E);
PORTD = data;
PORTC &=~(1<<E);
_delay_us(120);
}

void LCD2x16_pos(int wiersz, int kolumna)
{
PORTC &= ~(1<<RS);
PORTC &= ~(1<<RW);

PORTC |= (1<<E);
delay_ms(1);
PORTD = 0x80+(wiersz-1)*0x40+(kolumna-1);
delay_ms(1);
PORTC &=~(1<<E);
_delay_us(120);
}



int main(void){
char www[16] = "www-> are.net.pl";
char email[16] = "biuro@are.net.pl";
char tmp[17];
char tmp1[17];
int sp=60;
int h= 8;
int pv=51;
int e=0;




int i;
int j=4;

DDRD = 0xff;
PORTD = 0x00;
DDRC = 0xff;
PORTC = 0x00;
DDRB = 0xff;
PORTB = 0xff;

ADMUX=0x40;


_delay_ms(200);


LCD2x16_init();
LCD2x16_clear();

delay_ms(20);




   /* for(i=0;i < 16;i++)
        LCD2x16_putchar(www[i]);
    LCD2x16_pos(2,1);
    for(i=0;i < 16;i++)
        LCD2x16_putchar(email[i]);

delay_ms(3000);
LCD2x16_clear();
for(i=0;i < 16;i++)
    LCD2x16_putchar(www[i]);*/

while(1)
    {

    if(~PINB & 0x01)
            sp=50;
        if(~PINB & 0x02)
            sp=40;
        if(~PINB & 0x04)
            h=4;
        if(~PINB & 0x08)
            h=10;
    //LCD2x16_clear();

    e=sp-pv;
    sprintf(tmp1,"SP=%2dp    PV=%2dC", sp, pv);
    LCD2x16_pos(2,1);
    sprintf(tmp,"H=%2dp     E=%3dC",h, e);
    for(i=0;i < 16;i++)
        LCD2x16_putchar(tmp[i]);
    LCD2x16_pos(1,1);
    for(i=0;i < 16;i++)
    LCD2x16_putchar(tmp1[i]);
    delay_ms(100);
    }

return 0;
}