Starts the procedure to calibrate a resistive touch screen.
Note
This command returns a [NACK] for a capacitive touch screen.
All iLCD panels with a touch panel are calibrated after production, but you may repeat the calibration process anytime.
When issuing this command, the iLCD panel shows intructions for calibration on the screen. After pressing two positions, the calibration is done and the calibration values are stored in the iLCD controller automatically.
Sending Reset All stops the calibration process, the previous existing values are used then.