/**********************************
To display images stored on an SD card using the ILI9341 TFT display connected to an Arduino, follow these steps:

Hardware Setup:
Connect the ILI9341 TFT display to your Arduino using SPI communication.
Ensure that the SD card slot is also connected to the appropriate pins on the Arduino (usually shared with the display).
Use proper level shifters if needed to convert voltage levels between the Arduino (usually 5V) and the display/SD card (3.3V).
Library and Dependencies:
Use the Adafruit_ILI9341 library for controlling the display.
Make sure you have an SD card with image files (e.g., BMP, JPEG) stored on it.
Code Implementation:
Initialize the display and SD card using the appropriate libraries.
Read image files from the SD card one by one.
Convert the image data (e.g., BMP) into a format compatible with the ILI9341 display.
Display the image on the screen.
Example Code: Below is a simplified example of how you can load and display a BMP image from an SD card using the ILI9341 display. Note that you’ll need to adjust the pins and filenames according to your setup:


**************************************************/

#include <Adafruit_ILI9341.h>
#include <Adafruit_ImageReader.h>
#include <Adafruit_SPIFlash.h>
#include <SD.h>

#define TFT_CS 10
#define TFT_DC 9
#define SD_CS 4

Adafruit_ILI9341 tft = Adafruit_ILI9341(TFT_CS, TFT_DC);
Adafruit_ImageReader reader(SD_CS);

void setup() {
  tft.begin();
  SD.begin(SD_CS);
  reader.begin(SD_CS);
}

void loop() {
  // Load and display an image (e.g., "image.bmp")
  if (reader.open("image.bmp")) {
    tft.fillScreen(ILI9341_BLACK);
    reader.draw(tft, 0, 0);
    reader.close();
  }

  // Add a delay or button press to display the next image
  delay(2000);
}
/**********************************************
Customization:
Modify the code to handle different image formats (e.g., JPEG, PNG).
Implement a mechanism (button press, timer, etc.) to cycle through multiple images.
Remember to adjust the pin numbers, filenames, and other parameters according to your specific hardware configuration. Happy coding! 🎨🖼️

Learn more
1
forum.arduino.cc
2
youtube.com
3

projecthub.arduino.cc
4
forum.arduino.cc
+3 more


How do I convert BMP to ILI9341-compatible format?
What other image formats are supported?
Can you provide a more detailed example?





To convert a BMP image to a format compatible with the ILI9341 TFT display, you’ll need to follow these steps:

Choose an Image:
Start by selecting a BMP image that you want to display on the ILI9341 screen.
Convert to 16-Bit Color Format:
The ILI9341 display typically uses a 16-bit color format (565 RGB).
BMP images are usually in 24-bit color format (888 RGB).
You’ll need to convert the BMP image to the 16-bit format.
Tools for Conversion:
There are several tools and scripts available for this purpose:
bmp2c: A Python script that converts 24-bit BMP images to 565 format byte arrays suitable for ILI9341 displays. You can find it on GitHub1.
Custom Script: You can write your own script to read the BMP file, extract pixel data, and convert it to the 16-bit format.
Python Script Example (bmp2c):
The bmp2c script mentioned above is straightforward to use:
Provide your 24-bit BMP image as input.
It will generate a 565 format byte array that you can include in your Arduino sketch.
Follow the instructions in the GitHub repository to run the script and obtain the converted data.
Arduino Sketch Integration:
Once you have the converted data, integrate it into your Arduino sketch.
Use the pushColors function (or similar) to display the image on the ILI9341 screen.
Adjust Display Parameters:
Make sure your ILI9341 display is properly initialized with the correct settings (SPI communication, resolution, etc.).
Adjust the pins and other parameters in your sketch to match your hardware setup.

*****************************************/