Arduino with max7219 error display

[maxim10373]

Hello

This is a Arduino Nano with Max7219 Eight digit display stop watch project;

I got this sketch from the net. There is a small problem in this that it works only after two or three resets after turning on the power.
Sometimes it doesn't work at all. Tried many displays of max7219 and it is still the same.
Other sketches are working fine with this Arduino and display.
Can anyone help?

#define RB5  5  // CS
#define RB6  4  // DATA
#define RB7  6  // CLK

#define SW1  2 // white PB
#define SW2  3 // red PB

void setup()   {

  pinMode(RB5, OUTPUT);
  pinMode(RB6, OUTPUT);
  pinMode(RB7, OUTPUT);

  pinMode(SW1, INPUT);
  pinMode(SW2, INPUT);
  //pullups
  digitalWrite(SW1, HIGH);
  digitalWrite(SW2, HIGH);

  digitalWrite(RB5, 0);
  init_MAX7219();

}

int digit;
unsigned int count;
char array1[10];

void loop()   {

  if (!digitalRead(SW1))   {
    count = 99999;
    for (int i = 0; i <= count; i++)   {
      bcdOut(i);
      delay(100);
      if (!digitalRead(SW2)) break;
    } // end for
  } //end if

}



int bcdOut(int j)   {

  // convert to BCD send to MAX7219

  // get 1st digit of j
  digit = j % 10; // MOD J
  writeMAX7219(1, digit);

  // get 2nd digit of j
  j = j / 10;
  digit = j % 10; // MOD j
  //  if (j == 0) digit = 0x0f;
  writeMAX7219(2, digit + 0x80);

  // get 3rd digit of j
  j = j / 10;
  digit = j % 10; // MOD j
  if (j == 0) digit = 0x0f;
  writeMAX7219(3, digit);

  // get 4th digit of j
  j = j / 10;
  digit = j % 10; // MOD j
  if (j == 0) digit = 0x0f;
  writeMAX7219(4, digit);

  // get 5th digit of j
  j = j / 10;
  digit = j % 10; // MOD j
  if (j == 0) digit = 0x0f;
  writeMAX7219(5, digit);

}


// note used reference only
// location is place on LCD display.
void typeInt(int k)   {
  char array1[10];
  itoa(k, array1, 10); // int to string
  // typeln(array1, location);
}



// shift data to MAX7219
// RB7 -> CLK, RB6 -> DATA, RB5 -> CS not
void ssrOut(unsigned char val)  {
  int j;
  for (j = 1; j <= 8; j++)  { // shift out MSB first
    unsigned char  temp = val & 0x80; // MSB out first
    if (temp == 0x80) digitalWrite(RB6, 1); // RB6 DATA
    else digitalWrite(RB6, 0);
    digitalWrite(RB7, 1);
    // delay(1);
    digitalWrite(RB7, 0);
    val = val << 1; // shift one place left
  }  // next j
}


void pulseCS(void)   {
  digitalWrite(RB5, 1);
  // delay(2);
  digitalWrite(RB5, 0);
}


void init_MAX7219(void)   {
  digitalWrite(RB5, 0); // CS NOT

  // set decode mode
  ssrOut(0x09); // address
  //  ssrOut(0x00); // no decode
  ssrOut(0xFF); // 4-bit BCD decode eight digits
  pulseCS();

  // set intensity 0x00 to 0x0f
  ssrOut(0x0A); // address
  ssrOut(0x08); // 7/32
  pulseCS();

  // set scan limit 0-7
  ssrOut(0x0B); // address
  // ssrOut(0x07); // 8 digits
  ssrOut(0x07); // 4 digits
  pulseCS();

  // clear MAX7219
  for (int i = 1; i <= 8; i++)   {
    ssrOut(i);
    ssrOut(0x0F);
    pulseCS();
  }

  // set for normal operation
  ssrOut(0x0C); // address
  // ssrOut(0x00); // Off
  ssrOut(0x01);  // On
  pulseCS();

}

void writeMAX7219(char address, char data)   {
  if ((address < 1) || (address > 8)) return;
  ssrOut(address); // valid numbers 1-8
  ssrOut(data);
  pulseCS();
}