tft lcd shield 9341 brands

The shield connects ILI9341"s data pins 0-7 to Arduino digital pins 2-8 (allowing parallel communication, not SPI). ILI"s RESET goes to pin to Arduino analog pin A4.CS (chip select) to A3. RS (CD command/data) to A2. WR and RD to A1 and A0.

ILI9341 is integrated inside the display. It drives the display and has nothing to do with touchscreen (Although the shield connects some pins of ILI9341 together with pins of the touchscreen).

To read a byte from ILI after sending a read command (e.g. 09h - Read Display Status) set RD from HIGH to LOW, so ILI9341 outputs data until RD returns HIGH. (see code)

The touch screen is attached on the surface of the display. It connects through 4 wires, which share arduino pins 8, 9, A2, A3 with ILI. So you can"t write to LCD display and read the touch screen in the same time.

Then we need to read a position of a touch. So we set one of the X wires to HIGH (which one depends on on which side of touch screen we want to read min/max value; see variant A/B in the code) and we read analog value on Y. The value should be in the range 0-1023, but touchscreen I tested returns 110-910 (So it need to be calibrated - run ILI9341_7.ino). Then we apply LOW-HIGH on Y layer and read analog value on X.

Features:2.4" diagonal LCD TFT Touch Panel displayBright, 4 white-LED backlight, on by default but you can connect the transistor to a digital pin for backlight controlColorful, 18-bit 262,000 different shades4-wire resistive touchscreen8 bit digital interface, plus 4 control linesUses digital pins 5-13 and analog 0-3. That means you can use digital pins 2, 3 and analog 4 and 5. Pin 12 is available if not using the micro SD5V compatible, use with 3.3V or 5V logicFor Arduino UNO R3 MEGA2560

With four bright white LED backlight and 240 x 320 pixels with individual RGB pixel control, this colour 2.8in. TFT display features a resistive touchscreen for fingertip detection across the entire screen surface. The workload is lifted from the microcontroller by a built-in controller equipped with RAM buffering, and the display board has two modes: 8-bit and SPI.

Put the screen(3.2 inch screen schematic) into shield (TFT01-3.2 shield schematic) first, then connect the shield to Arduino, it is quite straight forward.

3)Download and install UTFT ,URTouch ,SdFat,UTFT_Buttons and UTFT_SdRaw library file from following link and copy them into Arduino library folder. ( i.e. D:\arduino ide\Arduino 1.6.9\libraries )

You will see the code in each sketch: UTFT myGLCD(CTE32_R2, 38, 39, 40, 41).The first value of code refer to the mode of LCD screen. Please write CTE32_R2 or ILI9341_16 if you LCD screen is ILI9341; Please write CTE32 if you LCD screen is SSD1289;

When you use the others LCD screen from the others seller, you could check the PDF instruction in documentation file or open the UTFT.h file to find the correct code.The controller mode could be identifitied by the back mark as the following pictures.

Note: In the project of testing the SD card，please insert the SD card into the slot in back of the 3.2’’ LCD screen. The format of files in SD card must be the FAT32, you need to put the test files(i.e. ICONS.RAW,WAIT4GPS.RAW,SK45) into the SD card root directory.

You can check out http://www.elecfreaks.com/estore/displays/lcds/tft. They have adapters for both the UNO and Mega boards. I only use Mega 2560 boards when using displays since shields of 3.2 and larger require more resources. I can get Mega 2560 boards for between $8.00-$9.50 US. You should have no problem migrating to the Mega since the Arduino programming language is used for both the UNO and Mega. The only difference is the pin designations since the Mega has more pins than the UNO. I only use displays similar to what you find here:

These display units are themselves actual computers that are programmable using a drag and drop IDE interface. They interface well with the UNO and Mega (along with the Raspberry Pi) and use less resources than the ITDB Series. On the negative side, I feel that programming them with the Nextion IDE is less flexible than programming the ITDB series using UTFT and URTouch libraries.

Only get the white version 2.X boards. This shield uses less pin resources than some other shields. Like the display, I have used several knockoffs but with more than an occasional being defective.