File content as of revision 1:dd048edb2716:

#include "mbed.h"
#include <string>
#include <vector>
#include <iostream>
#include <sstream>
#include <iterator>
#include <stdio.h>
#include <ctype.h>
#include "uLCD_4DGL.h"

LocalFileSystem local("local");

DigitalOut myled(LED1);
Serial pc(USBTX,USBRX);
uLCD_4DGL lcd(p28,p27,p30); // serial tx, serial rx, reset pin;


vector<char> im;
vector<char> vec;
vector<char> name;
vector<char> final;


int i = 0;

void checkResult(vector<char> vec, vector<char> name)
{
    // This function will check the keypad values and check if the passcode exists or not

    vector<char> ans; //This vector should be the values coming from keypad
    ans.push_back('1');
    ans.push_back('2');
    ans.push_back('3');
    ans.push_back('4');
    ans.push_back('5');
    ans.push_back('6');
    if (vec.size()==6) {
        i++; //use "i" to find which person logged in.
        if (ans == vec) {
//            pc.printf("Found");
            lcd.printf("\nFound\n");
            final = name;
            final.insert(name.end(),vec.begin(),vec.end());

        } else {
//            pc.printf("not found");
            lcd.printf("\nnot found\n");
            final.clear();
        }
    }
}


void checkKeyboard(char c)
{
    if (c ==' ') {
        checkResult(vec,name);
        vec.clear();
        name.clear();
        final.clear();
//        pc.printf("clear");
        lcd.printf("clear");
    } else {
        if (isdigit(c)) {
            // write numbers (char) to vector vec
            vec.push_back(c);
//            pc.printf("\nnumber %c\n",c);
        } else if (isalpha(c)) {
            // write letters (char) to vector name
            name.push_back(c);
//            pc.printf("\nname %c\n",c);
        }
    }
}



int main()
{
    load_from_file();
    
    //interupt driven read from serial port
    // calls save_to_file();
    while(1) {
        char c = pc.getc();
        if (c!='#') {
            im.push_back(c); //writing all the characters into vector
            checkKeyboard(c);
        } else {
            for (int cnt = 0; cnt<im.size(); cnt++) {
                pc.printf("%c",im[cnt]);
                lcd.printf("%c",im[cnt]);
            }
        }
    }

}