Datasheet

To make new bitmaps, make sure they are less than 240 by 320 pixels and save them in 24-bit BMP format! They

must be in 24-bit format, even if they are not 24-bit color as that is the easiest format for the Arduino to decode. You

can rotate images using the setRotation() procedure.

The ShieldILI9341 example sketch shows everything you need to work with BMP images. Here’s just the vital bits

broken out…

Several header files are included at the top of the sketch. All of these are required…they let us access the SD card and

the display, and provide the image-reading functions:

Several #defines relate to hardware pin numbers, all fixed values when using the shield.

Then we declare the tft screen object, and the image-reader object like so:

After the SD and TFT’s begin() functions have been called (see the example sketch again, in the setup() function), you

can then call reader.drawBMP() to load an image from the card to the screen:

#include <SPI.h>

#include <SD.h>

#include <Adafruit_GFX.h> // Core graphics library

#include <Adafruit_ILI9341.h> // Hardware-specific library

#include <Adafruit_ImageReader.h> // Image-reading functions

#define SD_CS 4 // SD card select pin

#define TFT_CS 10 // TFT select pin

#define TFT_DC 9 // TFT display/command pin

Adafruit_ILI9341 tft = Adafruit_ILI9341(TFT_CS, TFT_DC);

Adafruit_ImageReader reader; // Class w/image-reading functions