งานปฏิบัติ5

#include "LedControl.h"

#include "Keypad.h"

#define C4  262

#define D4  294

#define E4  330

#define F4  349

#define G4  392

#define A4  440

#define B4  494

#define C5  523

char keys[4][4]={

  {7,8,9,0},

  {4,5,6,0},

  {1,2,3,0},

  {0,0,0,0}};

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

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

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

int melody[] = {C4,D4,E4,F4,G4,A4,B4,C5};

int dl = 300;

int buzzerpin = 11;

LedControl lc=LedControl(8,10,9,1); 

// Pin 8->DIN, 10->CLK, 9->CS(LOAD), 1 = No.of devices

void setup() 

{

  lc.shutdown(0,false);  

  lc.setIntensity(0,5); 

  lc.clearDisplay(0);

  pinMode(buzzerpin,OUTPUT);

  digitalWrite(buzzerpin,HIGH);

}

void loop() 

{

  char key = keypad.getKey();

  if ((key != NO_KEY) && (key < 9))

  {

    lc.setDigit(0,0,key,false);

    tone(buzzerpin, melody[key-1],dl);

    delay(dl);

    digitalWrite(buzzerpin,HIGH);

  }

}