Datasheet
This design uses the hardware SPI pins (SCK, MOSI, MISO, CE0, CE1) as well as GPIO #25 and #24. All other GPIO are
unused. Since we had a tiny bit of space, there's 4 spots for optional slim tactile switches wired to four GPIOs, that you
can use if you want to make a basic user interface. For example, you can use one as a power on/off button.
We bring out GPIO #23, #22, #21, and #18 to the four switch locations!
To make it super easy for use: we've created a custom kernel package based of off Notro's awesome framebuffer
work, so you can install it over your existing Raspbian (or derivative) images in just a few commands.
© Adafruit Industries
https://learn.adafruit.com/adafruit-pitft-28-inch-resistive-touchscreen-display-raspberry-
pi
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