ปฏิบัติ7

#include "LedControl.h"
#include "Keypad.h"
เป็นการเรียกใช้เพื่อที่จะใช้ฟังก์ชั่นพิเศษได้
char keys[4][4]={
  {'7','8','9','A'},
  {'4','5','6','B'},
  {'1','2','9','c'},
  {'E','0','F','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);
//Pin 8->DIN, 10->CLK, 9-CS(LOAD), 1=No.of devices

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;
}
}