Add UART1 Handler for as per NMEA sentence

main.c

@@ -61,5 +61,21 @@ void control_leds_based_on_speed(float speed_kmh) {
     }
 }
 
-
+void UART1_Handler(void)
+{
+    char data = UART1_DR_R & 0xFF;
+    if (data == '\n' || data == '\r')
+    {
+        nmea_sentence[nmea_index] = '\0';
+        if (strncmp((const char *)nmea_sentence, "$GPRMC", 6) == 0)
+        {
+        nmea_ready = true;
+        }
+        nmea_index = 0;
+    }
+    else if (nmea_index < MAX_FIELD_SIZE - 1)
+    {
+        nmea_sentence[nmea_index++] = data;
+    }
+}