Saving Rotated Touch Orientation

[craigb]

Anybody know if there is a way to save the touchscreen orientation when rotating the screen?

I have, so far, successfully rotated the screen 180 deg. with the GD.wr(REG_ROTATE, 1); command, and then running GD.cmd_calibrate();
But, I am trying to write a standalone interface application and I don't want the calibration routine to run every time I boot up.

Thanks,

[Pix-OS]

you could use the EEPROM for that and load the values in on startup of your application

[jamesbowman]

Currently this isn't as easy as it could be using the GD library.

Here is one solution: rotate the screen, do a recalibration, then write the values back to EEPROM so the GD2 library just uses them each time it starts.  Something like:


GD.self_calibrate();
for (int i = 0; i < 24; i++)
 EEPROM.write(1 + i, GDTR.rd(REG_TOUCH_TRANSFORM_A + i));