/**
Program to create a car monitor display using:
    - Arduino Due
    - a TFT display (https://www.tinytronics.nl/shop/en/displays/tft/3.5-inch-tft-display-320*480-pixels-mega-compatible-ili9486)
    - ELM327 Bluetooth OBD2 scanner
    - FSC-DB004 (BT 836B) bluetooth module
*/

/* include UTFT library */
#include <UTFT.h>

#define DEBUG 1

/* pins */
#define PIN_BT_RX 19
#define PIN_BT_TX 18
#define PIN_BT_STATE 3 /* connected/disconnected state of BT */

/* display size */
#define LCD_W 480
#define LCD_H 320

extern uint8_t BigFont[];
extern uint8_t SmallFont[];

char should_clear = 1;

/* Set the pins for the display and dev board                                */
/* Standard Arduino Mega/Due shield            : <display model>,38,39,40,41 */
UTFT display(ILI9486,38,39,40,41);

void setup() {
  randomSeed(analogRead(0));

  #if (DEBUG == 1)
  Serial.begin(9600);
  #endif
  /* Serial1 is bluetooth module, pin 18 and 19. */
  Serial1.begin(115200);

  /* Init display */
  display.InitLCD();
  display.setFont(BigFont);

  #if (DEBUG == 1)
  Serial.println("Starting");
  #endif
}

void loop() {
  // put your main code here, to run repeatedly:
  while (Serial1.available()) {
    char rec = Serial1.read();
    #if (DEBUG == 1)
    Serial.println(rec);
    #endif
  }

  if (should_clear) 
  {
    display.clrScr();
    display.setColor(255, 0, 166);
    display.fillRect(LCD_W/2-200,LCD_H/2-100,LCD_W/2+200,LCD_H/2+100);
    display.setColor(0, 247, 255);
    display.print("OBD2 display yeet",CENTER,LCD_H/2);
    delay(10);
    should_clear = 0;
  }


}