#define LED_ON  LOW
#define LED_OFF  HIGH
#define DG1 23
#define DG2 25 
#define DG3 18 
#define DG4 14
#define A 32
#define B 13 
#define C 5 
#define D 22 
#define E 19 
#define F 33 
#define G 27 
#define DP 21 
#define DPColon 26 

hw_timer_t *timer1 = NULL; 
unsigned int number = 0; 
unsigned int tmpnumber1, tmpnumber2, tmpnumber3, tmpnumber4; 
int status7Seg = 1; 

void timer1_callback( void ); 
void showNumber(int num); 


void setup() { 
  number = 1201; 
  tmpnumber1 = number / 1000; 
  tmpnumber2 = (number - ((tmpnumber1) * 1000)) / 100; 
  tmpnumber3 = (number - (tmpnumber1 * 1000) - (tmpnumber2 * 100)) / 10; 
  tmpnumber4 = (number - (tmpnumber1 * 1000) - (tmpnumber2 * 100) - (tmpnumber3 * 10)); 
  Serial.begin( 115200 ); 
  Serial.printf( "\nShow Number : %d\n", number); 
  Serial.printf( "\nDG1:%d DG2:%d DG3:%d DG4:%d\n", tmpnumber1, tmpnumber2, tmpnumber3, tmpnumber4); 
  
  pinMode(DG1,OUTPUT); 
  pinMode(DG2, OUTPUT); 
  pinMode(DG3, OUTPUT); 
  pinMode(DG4, OUTPUT); 
  pinMode(DPColon, OUTPUT); 
  pinMode(A, OUTPUT); 
  pinMode(B, OUTPUT); 
  pinMode(C, OUTPUT); 
  pinMode(D, OUTPUT); 
  pinMode(E, OUTPUT); 
  pinMode(F, OUTPUT); 
  pinMode(G, OUTPUT); 
  pinMode(DP, OUTPUT); 
  timer1 = timerBegin(1000000); 
  timerAttachInterrupt( timer1, &timer1_callback ); 
  timerAlarm( timer1, 1000 , true, 0 ); //-> 100
} 

void loop() { 

}

void IRAM_ATTR timer1_callback( void ) 
{ 
 
  showNumber(10); 
    digitalWrite( DG1, HIGH ); 
    digitalWrite( DG2, HIGH); 
    digitalWrite( DG3, HIGH); 
    digitalWrite( DG4, HIGH); 

  if (status7Seg == 1) 
  { 
    showNumber(tmpnumber1); 
    digitalWrite( DG1, LOW ); 
    digitalWrite( DG2, HIGH ); 
    digitalWrite( DG3, HIGH ); 
    digitalWrite( DG4, HIGH ); 
    status7Seg = 2; 
  } 
  else if (status7Seg == 2) 
  { 
    showNumber(tmpnumber2); 
    digitalWrite( DG1, HIGH ); 
    digitalWrite( DG2, LOW); 
    digitalWrite( DG3, HIGH); 
    digitalWrite( DG4, HIGH); 
    status7Seg = 3; 
  } 
  else if (status7Seg == 3) 
  { 
    showNumber(tmpnumber3); 
    digitalWrite( DG1, HIGH ); 
    digitalWrite( DG2, HIGH ); 
    digitalWrite( DG3, LOW ); 
    digitalWrite( DG4, HIGH ); 
    status7Seg = 4; 
  } 
  else if (status7Seg == 4) 
  { 
    showNumber(tmpnumber4); 
    digitalWrite( DG1, HIGH ); 
    digitalWrite( DG2, HIGH ); 
    digitalWrite( DG3, HIGH ); 
    digitalWrite( DG4, LOW ); 
    status7Seg = 1; 
  } 
  else 
  { 
    status7Seg = 1; 
  } 
 
} 
 
void showNumber(int num) 
{ 
  if (num == 0) 
  { 
    digitalWrite( A, HIGH ); 
    digitalWrite( B, HIGH );
    digitalWrite( C, HIGH ); 
    digitalWrite( D, HIGH );
    digitalWrite( E, HIGH );  
    digitalWrite( F, HIGH ); 
    digitalWrite( G, LOW ); 
  } 
  else if (num == 1) { 
    digitalWrite( A, LOW ); 
    digitalWrite( B, HIGH ); 
    digitalWrite( C, HIGH ); 
    digitalWrite( D, LOW ); 
    digitalWrite( E, LOW );  
    digitalWrite( F, LOW ); 
    digitalWrite( G, LOW ); 
  } 
  else if (num == 2) { 
    digitalWrite( A, HIGH ); 
    digitalWrite( B, HIGH ); 
    digitalWrite( C, LOW ); 
    digitalWrite( D, HIGH ); 
    digitalWrite( E, HIGH );  
    digitalWrite( F, LOW ); 
    digitalWrite( G, HIGH ); 
  } 
  else { 
    digitalWrite( A, LOW ); 
    digitalWrite( B, LOW ); 
    digitalWrite( C, LOW ); 
    digitalWrite( D, LOW ); 
    digitalWrite( E, LOW );  
    digitalWrite( F, LOW ); 
    digitalWrite( G, LOW ); 
  } 
  
}