cofre.c v1.0

/* -----------------------------------------------------------------------------
 * File:            cofre.c
 * Project:         exemplo de cofre
 * Author:          Leandro Schwarz
 * Last modified:   22/08/2014
 * -------------------------------------------------------------------------- */

// System definitions
#define F_CPU   16000000UL
#define MCU_8_BITS

// Header files
#include "LS_defines.h"
#include "LS_ATmega328.h"
#include "LS_keypad.h"
#include "LS_HD44780.h"

// Constant definitions

#define STATE_IDLE          0
#define STATE_READ_PASS     1
#define STATE_CHECK_PASS    2

// Function declaration
void updateScreen(void);

// Global variables
uint8 state = STATE_IDLE;
uint8 passwordIndex = 0;
uint16 entry = 0;

// main function
int main()
{
    uint8 key;
    uint16 password = 1802;

    usartDisableTransmitter();
    usartDisableReceiver();

    // LCD configuration
    lcdInit();
    lcdStdio();
    printf(" Projeto Cofre  \n   Versao 1.0   \n");
    _delay_ms(2000);
    lcdClearScreen();

    // Keypad configuration
    keypadInit( 0x07, 0x08, 0x09, 0x0A,
                0x04, 0x05, 0x06, 0x0B,
                0x01, 0x02, 0x03, 0x0C,
                0x0E, 0x00, 0x0F, 0x0D);

    state = STATE_READ_PASS;
    updateScreen();

    while(1){

        // States machine
        switch(state){

        // IDLE STATE
        case STATE_IDLE:
            break;

        // READ PASS STATE
        case STATE_READ_PASS:
            key = keypadRead();
            if(key != 0xFF){
                if(key < 0x0A){
                    entry *= 10;
                    entry += key;
                    passwordIndex++;
                    if(passwordIndex == 4)
                        state = STATE_CHECK_PASS;
                    updateScreen();
                }
            }
            break;

        // CHECK PASS STATE
        case STATE_CHECK_PASS:
            if(password == entry){
                lcdCursorMoveFirstLine();
                printf("    ACERTOU!    \n\n");
                _delay_ms(3000);
            }else{
                lcdCursorMoveFirstLine();
                printf("     ERROU!     \n\n");
                _delay_ms(3000);
            }
            entry = 0;
            passwordIndex = 0;
            state = STATE_READ_PASS;
            updateScreen();
            break;
        }
    }
    return 0;
}

// Function updateScreen()
void updateScreen(void)
{
    uint8 i;

    lcdCursorMoveFirstLine();
    printf(" Senha: ");
    for(i = 0;i < passwordIndex;i++)
        printf("*");
    for(;i < 4;i++)
        printf("-");
    printf("\n%d\n", entry);

    return;
}