//BY CH.SC.U4CSE24049

#include <Keypad.h>

char keys[4][4]=
{
{'1','2','3','A'},  
{'4','5','6','B'},
{'7','8','9','C'},
{'*','0','#','D'}
};

int nums[10][7]=
{
{1,1,1,1,1,1,0}, //0
{0,1,1,0,0,0,0}, //1
{1,1,0,1,1,0,1}, //2
{1,1,1,1,0,0,1}, //3 
{0,1,1,0,0,1,1}, //4
{1,0,1,1,0,1,1}, //5
{1,0,1,1,1,1,1}, //6
{1,1,1,0,0,0,0}, //7
{1,1,1,1,1,1,1}, //8
{1,1,1,1,0,1,1}  //9
};

int alphs[4][7]=
{
{1,1,1,0,1,1,1}, //A
{1,1,1,1,1,1,1}, //B
{1,0,0,1,1,1,0}, //C
{1,1,1,1,0,0,0}  //D
};

uint8_t rowP[4]={9,8,7,6};
uint8_t colP[4]={5,4,3,2};

Keypad keypad = Keypad(makeKeymap(keys), rowP, colP, 4, 4);

void setup() {
  for(int i=10;i<17;i++){
    pinMode(i, OUTPUT);
  }
}

void loop() {
  char key= keypad.getKey();
  if(key!= NO_KEY){
    if((int)key>47 && (int)key<58){
      displayNum(((int)key)-48);
    }
    if((int)key>64 && (int)key<69){
      displayAlph(((int)key)-65);
    }
}
delay(1);
}

void displayNum(int num){
  for(int c=0;c<7;c++){
    digitalWrite(c+10,nums[num][c]);
  }
}

void displayAlph(int intAlph){
  for(int c=0;c<7;c++){
    digitalWrite(c+10,alphs[intAlph][c]);
  }
}