Arduino 6

#define FIRST_SEGMENT_PIN 0

#define SECOND_SEGMENT_PIN 7

#define SEGMENT_COUNT 7

byte numberSegments[10] = {

0b00111111, 0b00001010, 0b01011101, 0b01011110, 0b01101010,

0b01110110, 0b01110111, 0b00011010, 0b01111111, 0b01111110,

};

void setup()

{

for (int i = 0; i < 2 * SEGMENT_COUNT; i++)

pinMode(i, OUTPUT);

}

int firstNum;

int secondNum;

void loop(){

for(int time = 99; time >= 0; time--)

{

delay(1000);

firstNum = time % 10;

secondNum = time / 10;

Print(firstNum, FIRST_SEGMENT_PIN);

Print(secondNum, SECOND_SEGMENT_PIN);

}

}

// Функция вывода значений на экран.

void Print(int num, int startPin)

{

int mask = numberSegments[num];

for (int i = 0; i < SEGMENT_COUNT; ++i)

{

boolean enableSegment = bitRead(mask, i);

digitalWrite(i + startPin, enableSegment);

}

}