operations.h

#include "TM4C123.h"
#include "stdio.h"
#include "Io.h"
#include "delays.h"
#include "keypad.h"
#include "lcd.h"
#include "switches.h"
#include "stdlib.h"

#define NVIC_ST_CTRL_R          (*((volatile unsigned long *)0xE000E010))
#define NVIC_ST_RELOAD_R        (*((volatile unsigned long *)0xE000E014))
#define NVIC_ST_CURRENT_R       (*((volatile unsigned long *)0xE000E018))

void start_reading(unsigned char key);
void beef_cooking(unsigned char weight);
void chicken_cooking(unsigned char weight);


enum States {idle, prep, cooking, finish} mystate;
void RGB_Init(void);
void RGB_Output(unsigned char data);
void Blink (void);
enum States countdown(int min, int sec);
enum States cooking_time(void);
void SW3_Init(void);
unsigned sw3_Input(void);
unsigned char button_in;
unsigned char door_button;
unsigned char key;
unsigned char weight;
int seconds;
int minutes;
char c;
int min;
int  sec;


void RGB_Init()
{
  SYSCTL_RCGCGPIO_R |= 0x20; //for all bits in port f
	  while((SYSCTL_PRGPIO_R &= 0x20)== 0){} //delay
		GPIO_PORTF_LOCK_R = 0x4C4F434B;
		GPIO_PORTF_CR_R |= 0x0E;
		GPIO_PORTF_AMSEL_R &=~ 0x0E;
		GPIO_PORTF_AFSEL_R &=~ 0x0E;
		GPIO_PORTF_DIR_R |= 0x0E;
		GPIO_PORTF_DEN_R |= 0x1F;
		GPIO_PORTF_PCTL_R &=~0x0000FFF0;
		GPIO_PORTF_DATA_R &=~0x0E;
}


void RGB_Output(unsigned char data)
{
	GPIO_PORTF_DATA_R &=~ 0x0E;
	GPIO_PORTF_DATA_R |= data;
}

void Blink (void){
		RGB_Output(0x0E);
		delayMs(1000);
		RGB_Output(0x00);
		delayMs(1000);	
}

int8_t i;
void start_reading(unsigned char key)
{
		
LCD_command(0x80); /* LCD cursor location */
switch (key)
{
  case ('A'):

			LCD_command(0x01);//clearing lcd
			LCD_String("Popcorn"); 
			delayMs(2000);//delay 2 seconds
			LCD_command(0x01);//clearing lcd
			LCD_command(0x02);//returing cursor to its initial position
			break; 
	 
	 case ('B')://miffro -->case B
			LCD_String ("Beef");
			delayMs(2000);//delay 2 seconds
			LCD_command(0x01);//clearing lcd
	 		LCD_command(0x02);//returing cursor to its initial position
			break;

	 case ('C'):
			LCD_String ("chicken");
			delayMs(2000);//delay 2 seconds
			LCD_command(0x01);//clearing lcd
	 		LCD_command(0x02);//returing cursor to its initial position
			break;
	 
	 case('D'):
			LCD_String("Cooking Time?");
			delayMs(2000);
			LCD_command(0xC0);
			mystate =cooking;
			break;
}
return;
}

void beef_cooking(unsigned char weight){ 
		
		
		if(weight== 'A'||weight=='B'||weight=='C'||weight=='D'||weight=='*'||weight=='#'||weight=='0'){
		LCD_command(0x01);//clearing lcd
		LCD_String("Err");
		delayMs(2000);
		LCD_command(0x01);//clearing lcd
		LCD_command(0x02);//returing cursor to its initial position
		}
		else{
			int x = weight -48;
			x=x*30;
			minutes = x/60;
			seconds = x-(minutes *60);
      mystate=countdown( minutes,  seconds);
			
		}
		LCD_command(0x01);//clearing lcd
		LCD_command(0x02);//returing cursor to its initial position
		
      
	}

	void chicken_cooking(unsigned char weight){ 
		
		
		if(weight== 'A'||weight=='B'||weight=='C'||weight=='D'||weight=='*'||weight=='#'||weight=='0'){
		LCD_command(0x01);//clearing lcd
		LCD_String("Err");
		delayMs(2000);
		LCD_command(0x01);//clearing lcd
		LCD_command(0x02);//returing cursor to its initial position
		}
		else{
			int x = weight -48;
			x=x*12;
			minutes = x/60;
			seconds = x-(minutes *60);
      mystate=countdown( minutes,  seconds);
			
		}
		LCD_command(0x01);//clearing lcd
		LCD_command(0x02);//returing cursor to its initial position
      
	}
	
enum States cooking_time(void){
		char arr[4]= {'0','0','0','0'};
		int j;
	  LCD_command(0x01);
	  LCD_String("00:00");  
			
					while(1){
         	while (keypad_getkey() == 0xFF && sw_Input() != 0x11){};//waiting to enter a char or pressing a switch
				
						if (keypad_getkey() != 0xFF){
          c = keypad_getkey();//taking characters from user
						
						if(c== 'A'||c=='B'||c=='C'||c=='D'||c=='*'||c=='#'){//if input is not a number display an error
							  LCD_command(0x01);//clearing lcd
								LCD_String("Err");
								delayMs(2000);
								LCD_command(0x02);
							mystate =idle;//returing cursor to its initial position
									}
						else{
                for( j=0; j<3 ; j++){//taking numbers from user and store it in an array
                arr[j] = arr[j+1];
								}
                arr[3] = c;
              min = ((arr[0])-48)*10+ (arr[1]-48);//calculating minutes from 1st 2 elements in the array
              sec = ((arr[2])-48)*10+ (arr[3]-48);//calculating secondes from 2nd 2 elements in the array
              LCD_Display(min, sec);
							//mystate=cooking;
								
	             }
						 }
						 delayMs(2000);
						while(sw_Input()== 0x01 ){
							LCD_command(0x01);//clearing lcd
							return idle;
							
						}
							 while (sw_Input() == 0x10){ //switch 2 is pressed
						 if((min == 30 && sec == 0)|| (min<30 && sec <= 59 && sec > 0)) // check input time conditions
						{
				    mystate=countdown(min,sec );	//start countdown 
							if(mystate==idle)return idle;
							else {
							LCD_command(0x01);//clearing lcd
							return finish;}
						}
           else{
								LCD_command(0x01);//clearing lcd
								LCD_String("Err");
								delayMs(2000);
								LCD_command(0x02);//returing cursor to its initial position
           return idle;    
					 }
						 }
					 }
				 }

enum States countdown(int min, int sec){
	
while (min != -1){
				RGB_Output(0x0E);
	      LCD_Display(min,sec);//displays minutes and secondes on lcd
							delayMs(290);
                 sec--;
	         while(sw3_Input()==1){ Blink();}//While door open pause
			while(1){
				while(sw_Input()==0x01){//switch 1 pressed for 1st time and pause
					delayMs(3000);
					while(sw_Input()!=0x10){//switch 2 pressed after switch 1 (continue cooking)
						Blink();	
						if(sw_Input()==0x01){//switch 1 pressed for 2nd time clear lcd
						LCD_command(0x01);
						LCD_String("lcd clear!");
						delayMs(500);
						LCD_command(0x01);
						return idle;
						
						}
					}
				}	
				break;
			}
                 if(sec == -1){
                     min--;
                     sec = 59;
									 	
                 }
             }
return finish;
}