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// PIC24FJ128GA010 Configuration Bit Settings
// For more on Configuration Bits
// consult your device data sheet
// CONFIG2
#pragma config POSCMOD = XT // XT Oscillator mode selected
#pragma config OSCIOFNC = ON // OSC2/CLKO/RC15 as port I/O (RC15)
#pragma config FCKSM = CSDCMD // Clock Switching and Monitor disabled
#pragma config FNOSC = PRI // Primary Oscillator (XT, HS, EC)
#pragma config IESO = ON // Int Ext Switch Over Mode enabled
// CONFIG1
#pragma config WDTPS = PS32768 // Watchdog Timer Postscaler (1:32,768)
#pragma config FWPSA = PR128 // WDT Prescaler (1:128)
#pragma config WINDIS = ON // Watchdog Timer Window Mode disabled
#pragma config FWDTEN = OFF // Watchdog Timer disabled
#pragma config ICS = PGx2 // Emulator/debugger uses EMUC2/EMUD2
#pragma config GWRP = OFF // Writes to program memory allowed
#pragma config GCP = OFF // Code protection is disabled
#pragma config JTAGEN = OFF // JTAG port is disabled
// #pragma config statements should precede project file includes.
// Use project enums instead of #define for ON and OFF.
#include "buttons.h"
#include <math.h>
#include <xc.h>

int main(void) {
    unsigned char portValue;
    
    // Konfiguracja portów
    AD1PCFG = 0xFFFF;
    TRISA = 0x0000;
    portValue = 0x00;
    
    int program = 0;
    unsigned char snakePosition = 0b00000111;
    int direction = 1;
    
    unsigned char wynik = 0;
    unsigned char pom = 1;
    unsigned char pom2 = 1;
    unsigned char pom3 = 1;
    unsigned char pom4 = 1;
    unsigned char pom5 = 1;
    unsigned char pom6 = 1;
    unsigned char pom7 = 1;
    
    
    while(1){
        if(BUTTON_IsPressed(BUTTON_S3)){
            if(program==0){
                program=9;
            }else{
                program--;
                __delay32(1500000);
            }
        }
        if(BUTTON_IsPressed(BUTTON_S4)){
            if(program==9){
                program=0;
            }else{
                program++;
                __delay32(1500000);
            }
        }
        
        switch(program){
            case 0:
                for(int i=0;i<=255;i++){
                    LATA = i;
                    __delay32(500000);
                    if(BUTTON_IsPressed(BUTTON_S4) || BUTTON_IsPressed(BUTTON_S3)) break;
                }
                break;
            case 1:
                for(int i=255;i>=0;i--){
                    LATA = i;
                    __delay32(500000);
                    if(BUTTON_IsPressed(BUTTON_S4) || BUTTON_IsPressed(BUTTON_S3)) break;
                }
                break;
            case 2:
                for (int i = 0; i <= 255; i++) {
                    unsigned char gray = i ^ (i >> 1);
                    LATA = gray;
                    __delay32(500000);
                    if (BUTTON_IsPressed(BUTTON_S4) || BUTTON_IsPressed(BUTTON_S3)) break;
                }
                break;
            case 3:
                for (int i = 255; i >= 0; i--) {
                    unsigned char gray = i ^ (i >> 1);
                    LATA = gray;
                    __delay32(500000);
                    if (BUTTON_IsPressed(BUTTON_S4) || BUTTON_IsPressed(BUTTON_S3)) break;
                }
                break;
            case 4:
                for (int i = 0; i <= 99; i++) {
                    unsigned char tens = i / 10;
                    unsigned char ones = i % 10;
                    LATA = (tens << 4) | ones;
                    __delay32(500000);
                    if (BUTTON_IsPressed(BUTTON_S4) || BUTTON_IsPressed(BUTTON_S3)) break;
                }
                break;
            case 5:
                for (int i = 99; i >= 0; i--) {
                    unsigned char tens = i / 10;
                    unsigned char ones = i % 10;
                    LATA = (tens << 4) | ones;
                    __delay32(500000);
                    if (BUTTON_IsPressed(BUTTON_S4) || BUTTON_IsPressed(BUTTON_S3)) break;
                }
                break;
            case 6:
                while(1) {
                    LATA = snakePosition;
                    __delay32(500000);
                    if (BUTTON_IsPressed(BUTTON_S4) || BUTTON_IsPressed(BUTTON_S3)) break;
                    if (snakePosition == 0b11100000) {
                        direction = -1;
                    } else if (snakePosition == 0b00000111) {
                        direction = 1;
                    }
                    if (direction == 1) {
                        snakePosition = (snakePosition << 1); 
                    } else {
                        snakePosition = (snakePosition >> 1);
                    }
                }
                break;
            case 7:
                while(1){
                    for(int i = 0;i < 7;i++){
                        wynik = pom;
                        pom = pom << 1;
                        __delay32(500000);
                        LATA = wynik;
                    }
                    if(BUTTON_IsPressed(BUTTON_S4) || BUTTON_IsPressed(BUTTON_S3)) break;

                    for(int i = 0;i < 6;i++){
                        wynik = pom + pom2;
                        pom2 = pom2 << 1;
                         __delay32(500000);
                        LATA = wynik;
                    }
                    if(BUTTON_IsPressed(BUTTON_S4) || BUTTON_IsPressed(BUTTON_S3)) break;

                    for(int i = 0;i < 5;i++){
                        wynik = pom + pom2+ pom3;
                        pom3 = pom3 << 1;
                         __delay32(500000);
                        LATA = wynik;
                    }
                    if(BUTTON_IsPressed(BUTTON_S4) || BUTTON_IsPressed(BUTTON_S3)) break;

                    for(int i = 0;i < 4;i++){
                        wynik = pom + pom2 + pom3 + pom4;
                        pom4 = pom4 << 1;
                         __delay32(500000);
                        LATA = wynik;
                    }
                    if(BUTTON_IsPressed(BUTTON_S4) || BUTTON_IsPressed(BUTTON_S3)) break;

                    for(int i = 0;i < 3;i++){
                        wynik = pom + pom2 + pom3 + pom4 + pom5;
                        pom5 = pom5 << 1;
                         __delay32(500000);
                        LATA = wynik;
                    }

                    for(int i = 0;i < 2;i++){
                        wynik = pom + pom2 + pom3 + pom4+ pom5 + pom6;
                        pom6 = pom6 << 1;
                         __delay32(500000);
                        LATA = wynik;
                    }
                    if(BUTTON_IsPressed(BUTTON_S4) || BUTTON_IsPressed(BUTTON_S3)) break;

                    for(int i = 0;i < 1;i++){
                        wynik = pom + pom2 + pom3 + pom4+ pom5 + pom6 + pom7;
                        pom7 = pom7 << 1;
                         __delay32(500000);
                        LATA = wynik;
                    }
                    if(BUTTON_IsPressed(BUTTON_S4) || BUTTON_IsPressed(BUTTON_S3)) break;

                    wynik = wynik + 1;
                     __delay32(500000);
                        LATA = wynik;

                    wynik = wynik + 1;
                     __delay32(500000);
                        LATA = wynik;
                     
                        
                       wynik = 0;
                       pom = 1;
                       pom2 = 1;
                       pom3 = 1;
                       pom4 = 1;
                       pom5 = 1;
                       pom6 = 1;
                       pom7 = 1;
                        


                if(BUTTON_IsPressed(BUTTON_S4) || BUTTON_IsPressed(BUTTON_S3)) break;
                }
                break;
            case 8:
                
                break;
            default:
                break;
        }
    }
    return -1;
    }