Added helper functions for the display

+ init func.
+ update distance.
+ update direction.
+ update battery state.
+ reset func.

src/multi-tracker.cpp

@@ -28,6 +28,10 @@ static int prevHeading = -1;         // Store previous heading to avoid frequent
 unsigned long lastUpdate = 0;        // Time tracking for updates
 const int updateInterval = 500;      // Update interval in milliseconds (500ms = 0.5s)
 
+const uint8_t MAX_BATT_PERCENTAGE = 100;
+const uint8_t MIN_BATT_PERCENTAGE = 0;
+
+
 typedef struct MSG{
   uint8_t id;
   double latitude;
@@ -168,9 +172,7 @@ void setup(void) {
   // Initialize Serial Communication for debugging
   Serial.begin(SERIAL_BUADRATE);
 
-  // Display Setup
-  tft.init(TFT_X, TFT_Y);                // Initialize the display with a resolution of 240x280 pixels
-  tft.fillScreen(ST77XX_BLACK);      // Set the screen background to black
+  TFT_Init();
 
   // Magnetometer Setup
   if (!lis2mdl.begin()) {            // Initialize the magnetometer
@@ -262,6 +264,48 @@ void updateLEDs(int heading) {
   }
 }
 
+// Updates the distance part of the display
+void TFT_UpdateDistance(uint16_t meters) {
+
+}
+
+// Updates the direction part of the display
+void TFT_UpdateDirection() {
+
+}
+
+// Updates the batter/voltage state.
+uint8_t TFT_UpdateBatteryState(uint8_t percentage) {
+    if(percentage > MAX_BATT_PERCENTAGE || percentage < MIN_BATT_PERCENTAGE){
+        return Err;
+    }
+ 
+    return Ok;
+}
+
+// Displays the specifications of the node.
+void TFT_DisplaySpecs(void) {
+
+}
+
+
+// Resets the the display
+uint8_t TFT_Reset() {
+
+}
+
+// Initalizes the Screen with default startup screen.
+uint8_t TFT_Init(void) {
+  // Display Setup
+  tft.init(TFT_X, TFT_Y);           // Initialize the display with a resolution of 240x280 pixels
+  tft.fillScreen(ST77XX_BLACK);     // Set the screen background to black
+
+  TFT_UpdateDistance(0);
+  TFT_UpdateDirection(0);
+  TFT_UpdateBatteryState(100);
+}
+
+
 // Placeholder for updating the TFT display with GPS data
 void updateDisplay() {
     // Disable interrupts while using the dispaly.