//Program: SevenSegment_Project1.ino
uint32_t previousMillis_1; 
uint32_t previousMillis_2; 

uint32_t task1Time = 1000; 
uint32_t task2Time = 1000; 

uint32_t currentTime;
int i = 0; // Index for the 7-segment display
bool flag_LED1 = 0;
bool SSM = 0; //check if display
int SW1 = 16;

// 7-segment display patterns for 0-3
int LEDs[] = { 0b00111111, // 0
               0b00000110, // 1
               0b01011011, // 2
               0b01001111  // 3
             };

uint32_t *gpioOUT_SET = (uint32_t *)(0xD0000014);
uint32_t *gpioOUT_CLR = (uint32_t *)(0xD0000018);

void ISR_SW1() {
    SSM = 1;
    i = 0; //start from 0
}

void setup() {
    for(int pin = 0; pin < 8; pin++) { 
        pinMode(pin, OUTPUT); //7-SM OUTPUT
    }
    pinMode(LED_BUILTIN, OUTPUT);
    attachInterrupt(SW1, ISR_SW1, FALLING);
}

void loop() {
    currentTime = millis();

//Task 1 LED_BUILTIN 1s
    if (currentTime - previousMillis_1 >= task1Time) {
        previousMillis_1 = currentTime;
        if(!flag_LED1){
      digitalWrite(LED_BUILTIN,LOW);
    }
      else{
      digitalWrite(LED_BUILTIN,HIGH);
      }
       flag_LED1 = !flag_LED1; // Set LED state
    }

// Task 2 7-segment
    if (SSM) {
        if (i < 4) {
            *gpioOUT_SET = 0b00111111; // Turn on all segments
            *gpioOUT_CLR = LEDs[i]; // Clear to show the current number
            i++; // Move to the next number
            delay(1000); // Wait for 1 second to show the number
        } else {
            SSM = 0; // Reset the display state
            *gpioOUT_SET = 0b11111111; // Turn off all segments
        }
    }
}