#include <Arduino.h>

byte pin[] = {5, 18, 19, 3, 1, 22, 23, 21}; // a, b, c, d, e, f, g, dp
const int button_up = 26;
const int button_down = 12;
int count_index = 0;

const byte count[10] = {
    // ma du lieu cho led 7 doan
    // dpGFEDCBA
    B01000000, // 0
    B11111001, // 1
    B00100100, // 2
    B10110000, // 3
    B00011001, // 4
    B10010010, // 5
    B00000010, // 6
    B11111000, // 7
    B00000000, // 8
    B10010000, // 9  
};

void sevenSeg(byte Bit) {
    for(int i = 0; i < 8; i++) {
        digitalWrite(pin[i], bitRead(Bit, i));
    }
}

void IRAM_ATTR up_count_index() {
    if (count_index < 9) {
        count_index++;
    }
}

void IRAM_ATTR down_count_index() {
    if (count_index > 0) {
        count_index--;
    }
}

void setup() {
    for (int i = 0; i < 8; i++) {
        pinMode(pin[i], OUTPUT);
    }
    
    pinMode(button_up, INPUT_PULLUP);
    pinMode(button_down, INPUT_PULLUP);

    attachInterrupt(digitalPinToInterrupt(button_up), up_count_index, FALLING);
    attachInterrupt(digitalPinToInterrupt(button_down), down_count_index, FALLING);
}

void loop() {
    sevenSeg(count[count_index]);
    delay(100); // Delay để giảm tần suất cập nhật và tăng ổn định
}