CmdCalibrate

Action

Execute the touch screen calibration routine.

 

 

Syntax

CmdCalibrate 

 

 

Remarks

The calibration procedure collects three touches from the touch screen, then computes and loads an appropriate matrix into REG_TOUCH_TRANSFORM_A-F.

To use it, create a display list and then use CmdCalibrate . The co-processor engine overlays the touch targets on the current Display List, gathers the calibration input and updates REG_TOUCH_TRANSFORM_A-F.

 

The  completion of this function is detected when the value of REG_CMD_READ is equal to REG_CMD_WRITE.

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