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	- Project: "Button-Controlled Trafficlight"
	- Source Code NOT compiled for: Arduino Uno
	- Source Code created on: 2024-06-08 13:29:02

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/****** SYSTEM REQUIREMENTS *****/
/****** SYSTEM REQUIREMENT 1 *****/
	/* Develop a car and pedestrian traffic light */
	/* simulation with EasyButton. Utilize pin D2 for */
	/* button input, and pins D3, D4, D5, and D6 for LED */
	/* outputs. Ensure LEDs change states correctly in */
	/* the loop function, reflecting typical traffic */
	/* light behavior. */
/****** END SYSTEM REQUIREMENTS *****/

/****** DEFINITION OF LIBRARIES *****/
#include   // https://github.com/evert-arias/EasyButton

/****** FUNCTION PROTOTYPES *****/
void setup(void);
void loop(void);
void onButtonPressed(void);
void updateOutputs(void);

/***** DEFINITION OF DIGITAL INPUT PINS *****/
const uint8_t Button_PushButton_PIN_D2 = 2;

/***** DEFINITION OF DIGITAL OUTPUT PINS *****/
const uint8_t Red_LED_PIN_D3 = 3;
const uint8_t Green_LED_PIN_D4 = 4;
const uint8_t Red_LED_PIN_D5 = 5;
const uint8_t Green_LED_PIN_D6 = 6;

/***** DEFINITION OF OUTPUT RAW VARIABLES *****/
/***** used to store raw data *****/
bool Red_LED_PIN_D3_rawData = 0;
bool Green_LED_PIN_D4_rawData = 0;
bool Red_LED_PIN_D5_rawData = 0;
bool Green_LED_PIN_D6_rawData = 0;

/***** DEFINITION OF OUTPUT PHYSICAL VARIABLES *****/
/***** used to store data after characteristic curve transformation *****/
float Red_LED_PIN_D3_phyData = 0.0;
float Green_LED_PIN_D4_phyData = 0.0;
float Red_LED_PIN_D5_phyData = 0.0;
float Green_LED_PIN_D6_phyData = 0.0;

/****** DEFINITION OF LIBRARIES CLASS INSTANCES*****/
EasyButton button(Button_PushButton_PIN_D2);  // Initialize EasyButton object

/****** TRAFFIC LIGHT STATES *****/
enum TrafficLightState {
  CAR_GREEN_PEDESTRIAN_RED,
  CAR_YELLOW_PEDESTRIAN_RED,
  CAR_RED_PEDESTRIAN_GREEN
};

TrafficLightState currentState = CAR_GREEN_PEDESTRIAN_RED;

void setup(void)
{
  // put your setup code here, to run once:

  Serial.begin(115200);  // Initialize Serial for debugging
  Serial.println();
  Serial.println(">>> EasyButton example <<<");

  pinMode(Button_PushButton_PIN_D2, INPUT_PULLUP);

  pinMode(Red_LED_PIN_D3, OUTPUT);
  pinMode(Green_LED_PIN_D4, OUTPUT);
  pinMode(Red_LED_PIN_D5, OUTPUT);
  pinMode(Green_LED_PIN_D6, OUTPUT);

  button.begin();  // Initialize the button
  button.onPressed(onButtonPressed);  // Attach the callback function

  updateOutputs();  // Initialize the traffic light outputs
}

void loop(void)
{
  // put your main code here, to run repeatedly:

  button.read();  // Continuously read the status of the button
}

void onButtonPressed()
{
  Serial.println("Button pressed");  // Print message when button is pressed

  // Change traffic light state
  switch (currentState) {
    case CAR_GREEN_PEDESTRIAN_RED:
      currentState = CAR_YELLOW_PEDESTRIAN_RED;
      break;
    case CAR_YELLOW_PEDESTRIAN_RED:
      currentState = CAR_RED_PEDESTRIAN_GREEN;
      break;
    case CAR_RED_PEDESTRIAN_GREEN:
      currentState = CAR_GREEN_PEDESTRIAN_RED;
      break;
  }

  updateOutputs();  // Update the outputs based on the new state
}

void updateOutputs()
{
  // Update the LED outputs based on the current state
  switch (currentState) {
    case CAR_GREEN_PEDESTRIAN_RED:
      digitalWrite(Red_LED_PIN_D3, LOW);
      digitalWrite(Green_LED_PIN_D4, HIGH);
      digitalWrite(Red_LED_PIN_D5, HIGH);
      digitalWrite(Green_LED_PIN_D6, LOW);
      break;
    case CAR_YELLOW_PEDESTRIAN_RED:
      digitalWrite(Red_LED_PIN_D3, LOW);
      digitalWrite(Green_LED_PIN_D4, LOW);
      digitalWrite(Red_LED_PIN_D5, HIGH);
      digitalWrite(Green_LED_PIN_D6, LOW);
      break;
    case CAR_RED_PEDESTRIAN_GREEN:
      digitalWrite(Red_LED_PIN_D3, HIGH);
      digitalWrite(Green_LED_PIN_D4, LOW);
      digitalWrite(Red_LED_PIN_D5, LOW);
      digitalWrite(Green_LED_PIN_D6, HIGH);
      break;
  }
}

/* END CODE */