AtTiny_alarm_clock/main.c

/*
 * AtTiny_alarm_clock.c
 *
 * Created: 16.07.2018 13:55:13
 * Author : dozed
 */ 

#include <avr/io.h>
#include <stdlib.h>
#include "lcd4.h"

#define butt1 0

typedef enum {CLOCK_INIT = 0, CLOCK_IDLE, CLOCK_ALARM, CLOCK_STOPWATCH_RUNNING, CLOCK_STOPWATCH_STOPPED, CLOCK_STOPWATCH_NOT_SET, CLOCK_USER_INPUT, CLOCK_SET_TIME} clock_state_e;

clock_state_e clock_old_state;
clock_state_e clock_state = CLOCK_INIT;
clock_state_e clock_new_state = CLOCK_INIT;

uint8_t t1[] = {' ','H','a','l','l','o','_','_','_','_','_','_','_','_','_','_','_'};
int counter = 0;

uint8_t flags;

int main(void)
{
	DDRD = 0x00;
	
	
	
    /* Replace with your application code */
    while (1) 
    {
		clock_state = clock_new_state;
		switch(clock_state){
			case CLOCK_INIT:
				//do some init stuff...
				lcd_init(); //I know, it's just c but I don't care
				lcd_instruct(lcd_DISPLAY_CLEAR);
				//INIT done -> change to IDLE
				clock_new_state = CLOCK_IDLE;

				break;

			case CLOCK_IDLE:
				//IDLE MODE

				//print the IDLE Screen
				
				lcd_write_text(0,0,t1);
				
				if(((PIND & 0x03) == 3) != (flags & 1<<butt1)){
					
					if((PIND & 0x03) == 3){
						flags |= 1<<butt1;
						counter++;
					}
					else{
						flags &= ~(1<<butt1);
					}	
				}
				
				
					t1[0] = counter + 48;
				
			break;
		}
    }
}

void lcd_write_text(int row, int col, uint8_t text[16])
{
	switch(row){
		case 0:
			row = line1;
			break;
		case 1:
			row = line2;
			break;
	}
	int i=0;
	while(text[i] != 0x5F){
		lcd_write(row, text[i], 0+i);
		i++;
	}
}