Datasheet

Resistive Touchscreen Paint Demo

The LCD has a 2.8" 4-wire resistive touch screen glued onto it. You can use this for detecting finger-presses, stylus',

etc. Normally, you'll need 4 pins to talk to the touch panel but we decided to go all snazzy and put a dedicated touch

screen driver onto the shield. The driver shares the SPI pins with the TFT and SD card, so only one extra pin is needed

(digital #8) This allows you to query the controller when you're ready to read touchscreen data, and saves 3 pins.

To control the touchscreen you'll need one more library (https://adafru.it/d4f) - the STMPE610 controller library which

does all the low level chatting with the STMPE610 driver chip.

Once you have the library installed, restart the IDE. Now from the examples->Adafruit_ILI9341 menu select touchpaint

and upload it to your Arduino.

This page is for the Resistive Touch Screen version of the Shield!

The touch screen is made of a thin glass sheet, and its very fragile - a small crack or break will make the

entire touch screen unusable. Don't drop or roughly handle the TFT and be especially careful of the corners

and edges. When pressing on the touchscreen, sometimes people can use the tip of their fingers, or a

fingernail. If you don't find the touchscreen responds well to your fingers, you can use a rounded stylus which

will certainly work. Do not press harder and harder until the screen cracks!