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→Exemple: le Paint tactile
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'''!
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'''!
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== Images depuis la Carte SD ==
There is a built in microSD card slot into the shield, and we can use that to load bitmap images! You will need a microSD card '''formatted FAT16 or FAT32''' (they almost always are by default)
{{tmbox
| type = speedy
| text = The SD card socket shares pins with the TFT, so many of the 'default' example sketches for the SD card will not work without following the initialization steps in this sketch. Before assuming that the TFT shield is broken because the default SD examples wont work, run this BMP drawing sketch. If you need to use the microSD card holder look carefully at the example sketch to see the steps to initialize the card and TFT in order }}
You'll also need to download our SD library modifyied to allow faster reads (these changes will be added to arduino v23) but for [https://github.com/adafruit/SD now you can download the new library here]. Download the library by clicking the '''Downloads''' button and uncompressing the folder. Replace the files in your '''ArduinoIDE/libraries/SD''' folder and restart the IDE.
'''FOR MEGA ARDUINOS''' edit the '''SD/utility/Sd2Card.h''' file after installing and uncomment the line that says '''#define MEGA_SOFT_SPI 1''' to allow the Mega to use the same pinout for SD cards as the Classic Arduinos
[http://www.ladyada.net/images/tftshield/tiger.bmp Download this tiger bitmap and save it to the microsd card!] (Image by [http://www.flickr.com/photos/shanegorski/2515009456/in/photostream/ Shane Gorski] )
Start up the IDE and select the '''tftbmp_shield''' sketch. Upload it to your Arduino to see the tiger!
Start up the IDE and select the tftbmp_shield sketch. Upload it to your Arduino to see the tiger!
[[Fichier:TftTouch-Tiger.jpg]]
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. You can rotate images using the '''setRotation()''' procedure.
== Contrôler le rétro-éclairage ==
By default, we assume you'll want the backlight on all the time. However, you may want to PWM control or otherwise turn off the LED backlight to save power. You can do this with a simple hack. On the back, look for the two '''backlight''' jumpers. Cut the trace between the '''VCC''' jumper using a sharp knife and then solder the jumper labeled '''Pin 3'''. Then you can use Digital 3 to control the backlight
[[Fichier:TftTouch-BackLight.jpg]]
== Références ==
== Références ==