Example Code for Arduino-Display BMP from SD Card

Hardware Preparation

• 3.5 TFT Resistive Touch Shield (SKU:DFR0348) × 1
• Arduino Compatible Board × 1

Software Preparation

• Arduino IDE (Latest Version), Download Link: https://www.arduino.cc/en/software
• DmTftLibrary, Download Link: https://bitbucket.org/displaymodule/dmtftlibrary/get/master.zip
• DmImageConverter (for 16-bit BMP conversion), Download Link: https://bitbucket.org/displaymodule/dmtftlibrary/downloads/DmImageConverter.msi
• Arduino Library Installation Guide: https://docs.arduino.cc/software/ide-v1/tutorials/installing-libraries

Wiring Diagram

1. The 3.5 TFT Resistive Touch Shield connects directly on top of an Arduino pin compatible device.
2. Insert the micro-SD card into the shield’s SD card slot.

Other Preparation Work

It requires a special format for the displaying picture: 16bit RGBRGB bmp
You could download the convert tool here：ImageConverter

Anyway, there is converted picture in the library folder (DmTftLibrary\examples\DM-TFT35-107). You could have a try with it first.

1. Copy the converted picture to the SD.
2. Plug SD card in the touch screen.
3. Download the following program

Sample Code

 #include <SPI.h>
 #include <SPIFlash.h>
 #include <SD.h>
 #include <DmTftSsd2119.h>
 #include <DmDrawBmpFromSdCard.h>
 #define TFT_CS  10
 #define SD_CS   8
 #define F_CS    6
 #define T_CS    4
 DmTftSsd2119 tft = DmTftSsd2119(10, 9);
 DmDrawBmpFromSdCard drawImage = DmDrawBmpFromSdCard();
 void setup()
 {
  pinMode(TFT_CS, OUTPUT); // Set CS SPI pin HIGH for all SPI units, so they don't interfere
  digitalWrite(TFT_CS, HIGH);
  pinMode(T_CS, OUTPUT);
  digitalWrite(T_CS, HIGH);
  pinMode(SD_CS, OUTPUT);
  digitalWrite(SD_CS, HIGH);
  pinMode(F_CS, OUTPUT);
  digitalWrite(F_CS, HIGH);
  Serial.begin(9600);
  tft.init();
  SD.begin(SD_CS);
 }
 void loop() {
  drawImage.drawImage("logol565.bmp", tft, 0, 0);//Display picture
  delay(6000);
  drawImage.drawImage("logo1888.bmp", tft, 0, 0);
  delay(6000);
  }

Result

The shield will display the BMP images from the SD card in a loop (each image shown for 6 seconds).