// After sending a bitmap to both displays,
// one display can be filled with a color,
// but the other can not.
// It is regardless of the order, if the
// the second display is filled with a color first,
// then the first display does not work.
//
// Do two display use too much SRAM memory ?
// Or is it a bug in the library ?
//
// It happens with the hardware and the software SPI bus.
//
// When the bitmap is send twice to the first display,
// then it is no problem.
// When the bitmap is send twice to the second display,
// then the bug occurs.


#include <Adafruit_GFX.h>
#include <Adafruit_ILI9341.h>
#include "bitmaps.h"

#define TFT1_CS   10
#define TFT1_DC   9
#define TFT1_RST  8

#define TFT2_CS   6
#define TFT2_DC   13
#define TFT2_RST  5

// Hardware SPI bus
Adafruit_ILI9341 tft1 = Adafruit_ILI9341(TFT1_CS, TFT1_DC, TFT1_RST);
Adafruit_ILI9341 tft2 = Adafruit_ILI9341(TFT2_CS, TFT2_DC, TFT2_RST);

// Software SPI bus
// Adafruit_ILI9341 tft1 = Adafruit_ILI9341(TFT1_CS, TFT1_DC, MOSI, SCK, TFT1_RST, MISO);
// Adafruit_ILI9341 tft2 = Adafruit_ILI9341(TFT2_CS, TFT2_DC, MOSI, SCK, TFT2_RST, MISO);

void setup() 
{
  Serial.begin(115200);
  Serial.println("Hello");

  Serial.println("begin both");
  tft1.begin(); 
  tft2.begin();
  
  tft1.setRotation(0); 
  tft2.setRotation(0);

  Serial.println("colors both");
  tft1.fillScreen(ILI9341_GREEN); 
  delay(500);
  tft1.fillScreen(ILI9341_RED); 
  delay(500);
  tft1.fillScreen(ILI9341_BLUE); 
  delay(500);
  tft2.fillScreen(ILI9341_GREEN); 
  delay(500);
  tft2.fillScreen(ILI9341_RED); 
  delay(500);
  tft2.fillScreen(ILI9341_BLUE); 
  delay(500);

  // Remove the bitmap and the colors will
  // be written.
  // Use the bitmap, and the second tft display
  // does not get a color.  
  Serial.println("bitmap both");
  tft1.drawBitmap(70, 120, LAMBDA, 100, 100, ILI9341_ORANGE);
  tft2.drawBitmap(70, 120, LAMBDA, 100, 100, ILI9341_ORANGE);
  delay(1000);

  Serial.println("color tft1");
  tft1.fillScreen(ILI9341_PURPLE); 
  delay(500);

  Serial.println("color tft2");
  tft2.fillScreen(ILI9341_PURPLE); 
  delay(500);

  Serial.println("color tft1");
  tft1.fillScreen(ILI9341_CYAN); 
  delay(500);

  Serial.println("color tft2");
  tft2.fillScreen(ILI9341_CYAN); 
  delay(500);

  Serial.println("End of setup()");
}

void loop() 
{
  delay(10);  
}