emWin memdev animation is very slow / needs too much memory

Discussion created by lpcware Employee on Jun 15, 2016
Latest reply on Jun 18, 2016 by lpcware
Content originally posted in LPCWare by haydnb on Mon Apr 11 23:56:49 MST 2016
I have built up a very simple application with emWin which uses GUI_MEMDEV_MoveIn/MoveOut to periodically show/hide a window containing some basic widgets.
On PC simulation everything runs fine, but on the board the animation is either very slow or the animation as such is not recognizable - there's just a blank screen and the next time it shows up the whole window without any animation in between.
I found out that the more I increase GUI_NUMBYTES in GUIConf.h, the smoother the animation becomes. Currently, the value is 6291456, which I think is very much, but the animation is still too juddery. My problem is, that I don't have more memory available.
Could anyone point me to what I'm missing here? Can it be that there is so much memory needed?

It runs on a Cortex M4, used display driver is GUIDRV_LIN_32, display size 800x480px.