**Clock Display** rev_07

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    - Project: **Clock Display**
    - Source Code compiled for: Arduino Uno
    - Source Code created on: 2024-12-09 11:34:36

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/****** SYSTEM REQUIREMENTS *****/
/****** SYSTEM REQUIREMENT 1 *****/
    /* print a clock on display and each number is within */
    /* a circle. */
/****** END SYSTEM REQUIREMENTS *****/

/* START CODE */

/****** DEFINITION OF LIBRARIES *****/
#include <SPI.h>
#include <ILI9488.h>    //https://github.com/jaretburkett/ILI9488
#include <U8g2_for_Adafruit_GFX.h>  //https://github.com/olikraus/U8g2_for_Adafruit_GFX
#include <RTClib.h> // Include the RTC library

/****** FUNCTION PROTOTYPES *****/
void setup(void);
void loop(void);
void drawClock();

/***** DEFINITION OF DIGITAL OUTPUT PINS *****/
const uint8_t display_ILI9488_TFT_RST_PIN_D2        = 2;
const uint8_t display_ILI9488_TFT_DC_PIN_D3     = 3;

/***** DEFINITION OF SPI PINS *****/
const uint8_t display_ILI9488_TFT_SPI_PIN_MOSI_D11      = 11;
const uint8_t display_ILI9488_TFT_SPI_PIN_MISO_D12      = 12;
const uint8_t display_ILI9488_TFT_SPI_PIN_SCLK_D13      = 13;
const uint8_t display_ILI9488_TFT_SPI_PIN_CS_D10        = 10;

/***** DEFINITION OF OUTPUT RAW VARIABLES *****/
/***** used to store raw data *****/
bool    display_ILI9488_TFT_RST_PIN_D2_rawData      = 0;
bool    display_ILI9488_TFT_DC_PIN_D3_rawData       = 0;

/***** DEFINITION OF OUTPUT PHYSICAL VARIABLES *****/
/***** used to store data after characteristic curve transformation *****/
float   display_ILI9488_TFT_RST_PIN_D2_phyData      = 0.0;
float   display_ILI9488_TFT_DC_PIN_D3_phyData       = 0.0;

/****** DEFINITION OF LIBRARIES CLASS INSTANCES*****/
// Create display object
ILI9488 tft(display_ILI9488_TFT_SPI_PIN_CS_D10, display_ILI9488_TFT_DC_PIN_D3, display_ILI9488_TFT_RST_PIN_D2);
U8G2_FOR_ADAFRUIT_GFX u8g2;
RTC_DS1307 rtc; // Create an RTC object

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

    pinMode(display_ILI9488_TFT_RST_PIN_D2,  OUTPUT);
    pinMode(display_ILI9488_TFT_DC_PIN_D3,   OUTPUT);
    pinMode(display_ILI9488_TFT_SPI_PIN_CS_D10,  OUTPUT);

    // start the SPI library:
    SPI.begin();

    // Initialize the display
    tft.begin();
    tft.setRotation(3); // Set rotation if needed
    tft.fillScreen(ILI9488_BLACK); // Clear screen
    u8g2.begin(tft); // Initialize U8g2 with the display

    // Initialize the RTC
    if (!rtc.begin()) {
        // RTC not found, handle error
        while (1);
    }
}

void loop(void)
{
    // put your main code here, to run repeatedly:
    drawClock(); // Call function to draw clock
    delay(1000); // Update every second
}

void drawClock() {
    // Get current hour and minute
    DateTime now = rtc.now(); // Get current time from RTC
    int hour = now.hour(); // Get the current hour
    int minute = now.minute(); // Get the current minute

    // Clear the previous clock
    tft.fillScreen(ILI9488_BLACK);

    // Draw clock face
    int centerX = tft.width() / 2;
    int centerY = tft.height() / 2;
    int radius = 100;

    // Draw circles for each hour
    for (int i = 0; i < 12; i++) {
        float angle = (i * 30) * (PI / 180); // 30 degrees for each hour
        int x = centerX + radius * cos(angle);
        int y = centerY + radius * sin(angle);
        tft.drawCircle(x, y, 20, ILI9488_WHITE); // Draw circle for hour
        u8g2.setFont(u8g2_font_ncenB08_tr); // Set font for hour numbers
        u8g2.setCursor(x - 5, y + 5); // Position cursor
        u8g2.print(i + 1); // Print hour number
    }

    // Draw hands for the current time
    float hourAngle = (hour % 12 + minute / 60.0) * 30; // Hour hand
    float minuteAngle = minute * 6; // Minute hand

    // Draw hour hand
    int hourX = centerX + (radius - 40) * cos(hourAngle * (PI / 180));
    int hourY = centerY + (radius - 40) * sin(hourAngle * (PI / 180));
    tft.drawLine(centerX, centerY, hourX, hourY, ILI9488_WHITE);

    // Draw minute hand
    int minuteX = centerX + (radius - 20) * cos(minuteAngle * (PI / 180));
    int minuteY = centerY + (radius - 20) * sin(minuteAngle * (PI / 180));
    tft.drawLine(centerX, centerY, minuteX, minuteY, ILI9488_WHITE);
}

/* END CODE */