lab3_sobreA_1_1.c

/* Main.c file generated by New Project wizard
 *
 * Created:   Sat Mar 12 2022
 * Processor: PIC18F45K22
 * Compiler:  MPLAB XC8
 */
#include <xc.h>
#include <stdbool.h>
#include "config.h"

#define LOGIC_HIGH 1
#define LOGIC_LOW 0
#define _XTAL_FREQ 8000000

#define DIS0 PORTAbits.RA0
#define DIS1 PORTAbits.RA1
#define DIS2 PORTAbits.RA2
#define DIS3 PORTAbits.RA3

enum status {RUNNING, STOPPED};

const char NUMBERS[] = {0b00111111, 0b00000110,
                        0b01011011, 0b01001111,
                        0b01100110, 0b01101101,
                        0b01111101, 0b00000111,
                        0b01111111, 0b01101111};

//Print number to 7SEG displays
//pointPos > 0
void imprimir_segments(int number, bool is_decimal, char pointPos)
{   
    for (int currDisplay = 0; currDisplay < 4; ++currDisplay)
    {
        int value = number % 10;
        //If decimal NUMBERS[] or 0b10000000 (8th bit is dp bit)
        //Otherwise just print value loaded from array
        if (is_decimal)
        {
            if (currDisplay == pointPos) LATD = NUMBERS[value] | 0x80;
            else LATD = NUMBERS[value];
        } 
        else LATD = NUMBERS[value];

        switch (currDisplay)
        {
            case 0: DIS0 = LOGIC_HIGH; break;
            case 1: DIS1 = LOGIC_HIGH; break;
            case 2: DIS2 = LOGIC_HIGH; break;
            case 3: DIS3 = LOGIC_HIGH; break;
        }
    
        __delay_us(50);

        DIS0 = DIS1 = DIS2 = DIS3 = 0x0;
        number = number / 10;
    }
}

//Muestra digito "digit" por la pantalla
//"display" del set de pantallas de 7-Segmentos
void displayDigit(char display, int digit)
{
        //If decimal NUMBERS[] or 0b10000000 (8th bit is dp bit)
        //Otherwise just print value loaded from array
        LATD = NUMBERS[digit];

        switch (display)
        {
            case 0: DIS0 = LOGIC_HIGH; break;
            case 1: DIS1 = LOGIC_HIGH; break;
            case 2: DIS2 = LOGIC_HIGH; break;
            case 3: DIS3 = LOGIC_HIGH; break;
        }
    
        __delay_us(50);

        DIS0 = DIS1 = DIS2 = DIS3 = 0x0;
}

//Muestra cuatro cifras de menor peso
//de un número decimal por pantalla 
//de 7-Segmentos
void displayNumber(int number)
{
    for (int currDisplay = 0; currDisplay < 4; ++currDisplay)
    {
        int value = number % 10;
        displayDigit(currDisplay, value);
        number = number / 10;
    }
}

//increase contador according to pin_number value
void addPORTB(int *counter, char pin_number)
{
    switch(pin_number)
    {
        case 0: *counter = *counter + 1; break;
        case 1: *counter = *counter + 10; break;
        case 2: *counter = *counter + 100; break;
        case 3: *counter = *counter + 1000; break;
    }
}

// setup PORTs for I/O
void config_PIC(void)
{
    ANSELA = 0b00000000; // Set pins for digital I/O
    ANSELB = 0b00000000; // Set pins for digital I/O
    ANSELC = 0b00000000; // Set pins for digital I/O
    ANSELD = 0b00000000; // Set pins for digital I/O
    ANSELE = 0b00000000; // Set pins for digital I/O

    TRISBbits.RB0 = LOGIC_HIGH; // Set pin as input
    TRISBbits.RB1 = LOGIC_HIGH; // Set pin as input
    TRISBbits.RB2 = LOGIC_HIGH; // Set pin as input
    TRISBbits.RB3 = LOGIC_HIGH; // Set pin as input

    TRISCbits.RC0 = LOGIC_LOW; // Set pin as output
    TRISCbits.RC1 = LOGIC_LOW; // Set pin as output

    TRISAbits.RA0 = LOGIC_LOW; // Set pin as output
    TRISAbits.RA1 = LOGIC_LOW; // Set pin as output
    TRISAbits.RA2 = LOGIC_LOW; // Set pin as output
    TRISAbits.RA3 = LOGIC_LOW; // Set pin as output

    TRISEbits.RE0 = LOGIC_HIGH; // Set pin as input
    TRISEbits.RE1 = LOGIC_HIGH; // Set pin as input
    TRISEbits.RE2 = LOGIC_HIGH; // Set pin as input

    TRISD = 0x00; // Set all pins from PORTD as output
    LATD = 0x00;
    LATA = 0x00; //7SEG displays are turned off at start
}

//setup interrupts for PIC18
void setupInterruptions(void)
{

}

//DISPLAY binary 1  if players wins the game
int winner() { return 0b00000001; }

//DISPLAY binary 2  if players loses the game
int loser() { return 0b00000010; }

//start game
void game_start(int *_game_stat) {*_game_stat = RUNNING;}

//stop game
void game_stop(int *_game_stat) {*_game_stat = STOPPED;}

void main(void)
{
    config_PIC();
    setupInterruptions();

    bool is_pressed = false;
    int contador = 0;
    int random_number = 0;
    int GAME_STATUS = STOPPED;
    // Write your code here
    while (1)
    {       
        //game entry point
        if (PORTEbits.RE0)
        {
            random_number = rand() % 10000;
            
            //busy wait until user press RE1 
            //input button to start the game
            while (!PORTEbits.RE1 && GAME_STATUS == STOPPED) displayNumber(random_number);

            contador = 0;
            game_start(&GAME_STATUS);
            bool RB0, RB1, RB2, RB3;
            RB0 = RB1 = RB2 = RB3 = false;

            bool can_stop = false;
            bool RE2_down = false;
            while (GAME_STATUS == RUNNING)
            {
                //Increase counter by 1 on RB0 falling edge
                if (PORTBbits.RB0) RB0 = true;
                else if (!PORTBbits.RB0 && RB0) {RB0=false; addPORTB(&contador, 0);}
                //Increase counter by 10 on RB1 falling edge
                if (PORTBbits.RB1) RB1 = true;
                else if (!PORTBbits.RB1 && RB1) {RB1=false; addPORTB(&contador, 1);}
                //Increase counter by 100 on RB2 falling edge
                if (PORTBbits.RB2) RB2 = true;
                else if (!PORTBbits.RB2 && RB2) {RB2=false; addPORTB(&contador, 2);}
                //Increase counter by 1000 on RB3 falling edge
                if (PORTBbits.RB3) RB3 = true;
                else if (!PORTBbits.RB3 && RB3) {RB3=false; addPORTB(&contador, 3);}
                
                if (PORTEbits.RE2) RE2_down = true;
                else if (!PORTEbits.RE2 && RE2_down) can_stop = true;

                if (can_stop && !PORTEbits.RE2) {game_stop(&GAME_STATUS);}

                displayNumber(contador);
            }

            //check if player won
            PORTC = (contador == random_number) ? winner() : loser();

            //Display correct number
            for (int i = 0; i < 300; ++i) displayNumber(random_number);

        }

        PORTD = 0;
        DIS0 = DIS1 = DIS2 = DIS3 = 0x0;
    }
}