LED Audio rev_03

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    - Project: LED Audio
    - Source Code NOT compiled for: Arduino Nano
    - Source Code created on: 2024-08-01 22:41:19

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/****** SYSTEM REQUIREMENTS *****/
/****** SYSTEM REQUIREMENT 1 *****/
    /* on button, flash the led 3x and play an mp3. user */
    /* internal pull-up */
/****** END SYSTEM REQUIREMENTS *****/

/****** DEFINITION OF LIBRARIES *****/
#include <SoftwareSerial.h>
#include <DFRobotDFPlayerMini.h>    //https://github.com/DFRobot/DFRobotDFPlayerMini

/****** FUNCTION PROTOTYPES *****/
void setup(void);
void loop(void);
void updateOutputs(void);
void handleButtonPress(void); // Function to handle button press

/***** DEFINITION OF DIGITAL INPUT PINS *****/
const uint8_t tt_PushButton_PIN_D2      = 2;

/***** DEFINITION OF DIGITAL OUTPUT PINS *****/
const uint8_t hh_LED_PIN_D3     = 3;

/***** DEFINITION OF Software Serial *****/
const uint8_t gg_DFPlayerMini_Serial_PIN_SERIAL_TX_A0       = A0;
const uint8_t gg_DFPlayerMini_Serial_PIN_SERIAL_RX_A1       = A1;
SoftwareSerial gg_DFPlayerMini_Serial(gg_DFPlayerMini_Serial_PIN_SERIAL_RX_A1, gg_DFPlayerMini_Serial_PIN_SERIAL_TX_A0);

/***** DEFINITION OF OUTPUT RAW VARIABLES *****/
/***** used to store raw data *****/
bool    hh_LED_PIN_D3_rawData       = 0;

/***** DEFINITION OF OUTPUT PHYSICAL VARIABLES *****/
/***** used to store data after characteristic curve transformation *****/
float   hh_LED_PIN_D3_phyData       = 0.0;

/****** DEFINITION OF LIBRARIES CLASS INSTANCES *****/
DFRobotDFPlayerMini myDFPlayer; // Instance of the DFPlayer Mini class

void setup(void)
{
    // put your setup code here, to run once:
    pinMode(tt_PushButton_PIN_D2, INPUT_PULLUP); // Set button pin as input with internal pull-up
    pinMode(hh_LED_PIN_D3, OUTPUT); // Set LED pin as output

    gg_DFPlayerMini_Serial.begin(9600); // Initialize software serial for DFPlayer
    Serial.begin(115200); // Initialize serial for debugging

    // Initialize DFPlayer
    if (!myDFPlayer.begin(gg_DFPlayerMini_Serial, true, true)) { // Use serial to communicate with mp3.
        Serial.println(F("Unable to begin:"));
        Serial.println(F("1. Please recheck the connection!"));
        Serial.println(F("2. Please insert the SD card!"));
        while (true); // Stop execution if initialization fails
    }
    Serial.println(F("DFPlayer Mini online."));
    myDFPlayer.volume(10); // Set volume value (0~30)
}

void loop(void)
{
    // put your main code here, to run repeatedly:
    updateOutputs(); // Refresh output data
    handleButtonPress(); // Check for button press

    if (myDFPlayer.available()) {
        // Handle DFPlayer messages
        printDetail(myDFPlayer.readType(), myDFPlayer.read());
    }
}

void updateOutputs()
{
    digitalWrite(hh_LED_PIN_D3, hh_LED_PIN_D3_rawData);
}

void handleButtonPress() {
    // Check if the button is pressed (LOW because of pull-up)
    if (digitalRead(tt_PushButton_PIN_D2) == LOW) {
        // Flash the LED 3 times
        for (int i = 0; i < 3; i++) {
            digitalWrite(hh_LED_PIN_D3, HIGH); // Turn LED on
            delay(250); // Wait for 250 ms
            digitalWrite(hh_LED_PIN_D3, LOW); // Turn LED off
            delay(250); // Wait for 250 ms
        }
        // Play an MP3 file (e.g., the first file)
        myDFPlayer.play(1); // Play the first MP3 file
        delay(1000); // Delay to avoid multiple triggers
    }
}

void printDetail(uint8_t type, int value) {
    // Function to print the details of DFPlayer state and errors
    switch (type) {
        case TimeOut:
            Serial.println(F("Time Out!"));
            break;
        case WrongStack:
            Serial.println(F("Stack Wrong!"));
            break;
        case DFPlayerCardInserted:
            Serial.println(F("Card Inserted!"));
            break;
        case DFPlayerCardRemoved:
            Serial.println(F("Card Removed!"));
            break;
        case DFPlayerCardOnline:
            Serial.println(F("Card Online!"));
            break;
        case DFPlayerUSBInserted:
            Serial.println(F("USB Inserted!"));
            break;
        case DFPlayerUSBRemoved:
            Serial.println(F("USB Removed!"));
            break;
        case DFPlayerPlayFinished:
            Serial.print(F("Number:"));
            Serial.print(value);
            Serial.println(F(" Play Finished!"));
            break;
        case DFPlayerError:
            Serial.print(F("DFPlayerError:"));
            switch (value) {
                case Busy:
                    Serial.println(F("Card not found"));
                    break;
                case Sleeping:
                    Serial.println(F("Sleeping"));
                    break;
                case SerialWrongStack:
                    Serial.println(F("Get Wrong Stack"));
                    break;
                case CheckSumNotMatch:
                    Serial.println(F("Check Sum Not Match"));
                    break;
                case FileIndexOut:
                    Serial.println(F("File Index Out of Bound"));
                    break;
                case FileMismatch:
                    Serial.println(F("Cannot Find File"));
                    break;
                case Advertise:
                    Serial.println(F("In Advertise"));
                    break;
                default:
                    break;
            }
            break;
        default:
            break;
    }
}

/* END CODE */