I have used the BSP named L3.0.35_4.1.0_ER_SOURCE_BSP for driving a Touch Screen. The driver IC of Touch Screen is MAX11801. After modifying the file named max11801_ts.c according to the method 3 provided by wj chen on the website https://community.freescale.com/message/373694#373694, I could open a folder or file by touching the screen.
However, the position I touched on the screen was much different from the position of arrow-shaped pointer. To solve this problem, I have tried to use tslib. After running the file named ts_calibrate for several times and when the file named ts_test is running, the position I touched on the screen was nearly the same as the position of the cross icon generated by tslib. But there was still a big difference between the position I touched on the screen and the position of arrow-shaped pointer. The attached file is the image.
How should I do to reduce the difference? Can tslib be used to reduce the difference?