Datasheet

15,625,000 (a.k.a 16000000 = 16 MHz)

17,857,142 (a.k.a. 18000000 = 18 MHz)

20,833,333 (a.k.a 21000000 = 21 MHz)

25,000,000 (= 25 MHz)

31,250,000 (a.k.a 32000000 = 32MHz)

41,666,666 (a.k.a 42000000 = 42MHz)

62,500,000 (a.k.a 62000000 = 62MHz)

So if you put in 48000000 for the speed, you won't actually get 48MHz, you'll actually only get about 42MHz

because it gets rounded down. We tested this display nicely with 32MHz and we suggest that. But you can put in

42MHz or even try 62MHz and it will update faster

You can tweak fps (frames per second) from 20 to 60 and frequency up to 62MHz for tradeoffs in performance and

speed. Reboot after each edit to make sure the settings are loaded properly. There's a trade off that if you ask for

higher FPS you're going to load the kernel more because it's trying to keep the display updated.

How can I take screenshots of the little screen?

We took the screenshots for this tutorial with fbgrab

wget http://fbgrab.monells.se/fbgrab-1.2.tar.gz

tar -zxvf fbgrab*gz

cd fbgrab/

make

./fbgrab screenshot.png

How do I automatically boot to X windows on the PiTFT?

https://learn.adafruit.com/adafruit-pitft-28-inch-resistive-touchscreen-display-raspberry-

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