How to change (0,0) Top Left Corner to (0,0) Down Left Corner for the display

General discussion
1

Hi

Touch screen on display taking values (0,0) as Down Left Corner and Display was taking (0,0) as Top Left Corner. How to change display to Down Left Corner as (0,0). I am running my project on uclinux for Cortex M7. Please do the needful.

Thank you
Mahesh

2

The simplest is to transform output from touchscreen, i.e. in function you’ve registered as callback for LV_INDEV_TYPE_POINTER input device, you do something like

data->point.x = touchpad_x;
data->point.y =  LV_VER_RES_MAX - touchpad_y;

JW

1 Like
3

Hi
Can I get the code that reads touch screen data?

Thank you
Mahesh

4

Hi

I need to rotate the display to -90 degrees so that the values of the touch screen will match. Is there any possibility to do that? Please help me in this.

Thank you
Mahesh

5

Are you trying to rotate the display to match the touchscreen, or vice versa?

6

Yes, I am trying to rotate the display to match the touchscreen to -90 degrees.