QNX RTOS v4 Knowledge Base
QNX RTOS v4 Knowledge Base
| Title |
X and Y Coordinates reversed on a touch screen |
| Ref. No. |
QNX.000010190 |
| Category(ies) |
Input Devices |
| Issue |
The latest Elo touch screens which are being sent to us have the membrane installed differently. Whenever we do a calibration, the x and y axis are reversed. As I move left to right in the x direction, the cursor moves up and down. |
| Solution |
The first step that you want to do is boot the board and after you have run the calibration program then slay the input driver and rerun it. There seems to be a problem sometimes with the last bit in the calibration file. This bit is the one that tells the screen wether or not to flip the x and y coordinates. If after trying this above method you still can't get the screen to work correctly then try flipping the last bit in the calibration file. |
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