CmdCalibrate
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| − | The calibration procedure collects three touches from the touch screen, then computes and loads an appropriate matrix into <span style="color: | + | The calibration procedure collects three touches from the touch screen, then computes and loads an appropriate matrix into <span style="color:#ff0000;">REG_TOUCH_TRANSFORM_A-F</span>. |
| − | To use it, create a display list and then use | + | 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 <span style="color:#ff0000;">REG_TOUCH_TRANSFORM_A-F</span>. |
<span style="font-family: Arial;"> </span> | <span style="font-family: Arial;"> </span> | ||
| − | The completion of this function is detected when the value of <span style="color: | + | The completion of this function is detected when the value of <span style="color:#ff0000;">REG_CMD_READ</span> is equal to <span style="color:#ff0000;">REG_CMD_WRITE</span><span style="color: rgb(128, 0, 128);">.</span> |
Latest revision as of 14:20, 12 December 2014
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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