งานที่ 6

#include "LedControl.h"

#include "Keypad.h"

char keys[4][4]={

  {'7','8','9','A'},

  {'4','5','6','B'},

  {'1','2','3','C'},

  {'*','0','#','D'}};

byte rowPins[] = {7,6,5,4};

byte colPins[] = {3,2,1,0};

Keypad keypad = Keypad(makeKeymap(keys),rowPins,colPins,4,4);

LedControl lc=LedControl(8,10,9,1);

int m=7;

void setup()

{

  lc.shutdown(0,false); 

  lc.setIntensity(0,5);

  lc.clearDisplay(0);     

}

void loop()

{

  char key = keypad.getKey();

  if (key != NO_KEY)

  {

     if (m==7)

        lc.clearDisplay(0);

     lc.setChar(0,m,key,false);

     m = m-1;

     if (m < 0)

        m = 7;

  }

}