AnsweredAssumed Answered

Touch screen Calibration values and evtest in Yocto

Question asked by Anjalik Krishna on Nov 24, 2018
Latest reply on Nov 26, 2018 by igorpadykov

Hi all,

    I have few doubts regarding the values obtained after calibrating an Yocto based system and running the evtest program running on the same system.


I calibrated the touch screen using the xinput_calibrator and obtained the following values:


        Option  "Calibration"   "219   3879   172   4087"

Here Minimum x is 219, Maximum x is 3879 ,Minimum y is 172 and Maximum y is 4087


After that I executed the evtest and obtained the following values


Event type 0 (EV_SYN)
Event type 1 (EV_KEY)
Event code 330 (BTN_TOUCH)
Event type 3 (EV_ABS)
Event code 0 (ABS_X)
Value 2059
Min 0
Max 4095
Event code 1 (ABS_Y)
Value 2137
Min 0
Max 4095
Event code 24 (ABS_PRESSURE)
Value 0
Min 0
Max 255


Both the tests give  the values for Minimum and maximum X and Y values. But both results are entirely different.


Any one who can help on this?