ปฏิบัติ สป.10

โค้ดโปรแกรม

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);
// Pin 8->DIN, 10->CLK, 9->CS(LOAD), 1 = No.of devices
int m=3;
char num[4]; //num[0] to num[3]
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==3)
        lc.clearDisplay(0);
     lc.setChar(0,m,key,false);
     num[m]=key;
     m = m-1;
     if (m < 0)
     {
 if ((num[3]=='4')&&(num[2]=='0')&&(num[1]=='6')&&(num[0]=='9'))
  {
  lc.setChar(0,7,'0',false);
  lc.setChar(0,6,'P',false);
  }
 else
 {
  lc.setChar(0,7,'-',false);
   lc.setChar(0,6,'-',false);
   }
   m = 3;
    }
  }
}

คำอธิบาย
ถ้ากดรหัสใส่ KeyPad ถูกต้องโปรแกรมจะทำงาน