Debounced Blink rev_01

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    - Project: Debounced Blink
    - Source Code NOT compiled for: Arduino Uno
    - Source Code created on: 2025-09-21 07:02:56

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/****** SYSTEM REQUIREMENTS *****/
/****** SYSTEM REQUIREMENT 1 *****/
    /* ensure all functions are working properly */
/****** END SYSTEM REQUIREMENTS *****/


/* START CODE */

/****** DEFINITION OF LIBRARIES *****/

/****** FUNCTION PROTOTYPES *****/
void setup(void);
void loop(void);
void initSystem(void);
bool isButtonPressed(void);
void updateLED(void);

// Pin definitions
const int LED_PIN = 13;
const int BUTTON_PIN = 2;

// LED blink control
unsigned long lastToggleTime = 0;
unsigned int blinkInterval = 500; // milliseconds
bool ledState = false;

void initSystem(void)
{
    // Initialize system components and state
    // (Currently handled in setup; this function reserved for future expansion)
}

void updateLED(void)
{
    unsigned long now = millis();
    if (now - lastToggleTime >= blinkInterval) {
        lastToggleTime = now;
        ledState = !ledState;
        digitalWrite(LED_PIN, ledState ? HIGH : LOW);
    }
}

bool isButtonPressed(void)
{
    // Simple debounce: detect a press and wait for release
    if (digitalRead(BUTTON_PIN) == LOW) {
        delay(50); // simple debounce
        if (digitalRead(BUTTON_PIN) == LOW) {
            // Wait for button release
            while (digitalRead(BUTTON_PIN) == LOW) {
                // busy wait
            }
            return true;
        }
    }
    return false;
}

void setup(void)
{
    // put your setup code here, to run once:
    pinMode(LED_PIN, OUTPUT);
    pinMode(BUTTON_PIN, INPUT_PULLUP);
    digitalWrite(LED_PIN, LOW);
    // Initialize last toggle time to current time
    lastToggleTime = millis();
    initSystem();
}


void loop(void)
{
    // Debounced button press changes blink interval
    if (isButtonPressed()) {
        // Toggle between two speeds for visibility
        blinkInterval = (blinkInterval == 500) ? 200 : 500;
    }

    // Update LED state based on current interval
    updateLED();

    // Other tasks can be added here
}

/* END CODE */